Add image resizing support #225

Cargo.lock

@@ -1,3 +1,8 @@
+[[package]]
+name = "adler32"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "aho-corasick"
 version = "0.6.4"
@@ -183,6 +188,11 @@ dependencies = [
  "cc 1.0.17 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "color_quant"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "config"
 version = "0.1.0"
@@ -204,6 +214,7 @@ dependencies = [
  "errors 0.1.0",
  "front_matter 0.1.0",
  "globset 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "imageproc 0.1.0",
  "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rendering 0.1.0",
  "serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -254,6 +265,15 @@ dependencies = [
  "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "deflate"
+version = "0.7.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "dtoa"
 version = "0.4.2"
@@ -290,6 +310,14 @@ dependencies = [
  "strum_macros 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "enum_primitive"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "error-chain"
 version = "0.11.0"
@@ -303,6 +331,7 @@ name = "errors"
 version = "0.1.0"
 dependencies = [
  "error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "image 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tera 0.11.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -401,6 +430,15 @@ name = "getopts"
 version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "gif"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "color_quant 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lzw 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "glob"
 version = "0.2.11"
@@ -500,6 +538,44 @@ dependencies = [
  "unicode-normalization 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "image"
+version = "0.18.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "gif 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "jpeg-decoder 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-rational 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "png 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "imageproc"
+version = "0.1.0"
+dependencies = [
+ "errors 0.1.0",
+ "image 0.18.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "lazy_static 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "regex 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tera 0.11.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "twox-hash 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "utils 0.1.0",
+]
+
+[[package]]
+name = "inflate"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "inotify"
 version = "0.3.0"
@@ -537,6 +613,15 @@ name = "itoa"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "jpeg-decoder"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "kernel32-sys"
 version = "0.2.2"
@@ -587,6 +672,11 @@ dependencies = [
  "cfg-if 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "lzw"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "mac"
 version = "0.1.1"
@@ -810,6 +900,32 @@ dependencies = [
  "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "num-iter"
+version = "0.1.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-integer 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.1.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.5"
@@ -948,6 +1064,17 @@ dependencies = [
  "typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "png"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "bitflags 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "deflate 0.7.18 (registry+https://github.com/rust-lang/crates.io-index)",
+ "inflate 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-iter 0.1.37 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "precomputed-hash"
 version = "0.1.1"
@@ -999,6 +1126,16 @@ dependencies = [
  "proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand"
+version = "0.3.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "fuchsia-zircon 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.42 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.4.2"
@@ -1009,6 +1146,15 @@ dependencies = [
  "winapi 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rayon"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rayon-core 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rayon"
 version = "1.0.1"
@@ -1175,6 +1321,11 @@ dependencies = [
  "pkg-config 0.3.11 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "scoped_threadpool"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "scopeguard"
 version = "0.3.3"
@@ -1250,6 +1401,7 @@ dependencies = [
  "errors 0.1.0",
  "front_matter 0.1.0",
  "glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "imageproc 0.1.0",
  "pagination 0.1.0",
  "rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "sass-rs 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1441,6 +1593,7 @@ dependencies = [
  "config 0.1.0",
  "content 0.1.0",
  "errors 0.1.0",
+ "imageproc 0.1.0",
  "lazy_static 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "pulldown-cmark 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "taxonomies 0.1.0",
@@ -1544,6 +1697,14 @@ name = "traitobject"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "twox-hash"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "typeable"
 version = "0.1.2"
@@ -1750,6 +1911,7 @@ dependencies = [
 ]
 
 [metadata]
+"checksum adler32 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7e522997b529f05601e05166c07ed17789691f562762c7f3b987263d2dedee5c"
 "checksum aho-corasick 0.6.4 (registry+https://github.com/rust-lang/crates.io-index)" = "d6531d44de723825aa81398a6415283229725a00fa30713812ab9323faa82fc4"
 "checksum ammonia 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fd4c682378117e4186a492b2252b9537990e1617f44aed9788b9a1149de45477"
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@@ -1773,14 +1935,17 @@ dependencies = [
 "checksum chrono 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "6962c635d530328acc53ac6a955e83093fedc91c5809dfac1fa60fa470830a37"
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 "checksum cmake 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "95470235c31c726d72bf2e1f421adc1e65b9d561bf5529612cbe1a72da1467b3"
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 "checksum either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3be565ca5c557d7f59e7cfcf1844f9e3033650c929c6566f511e8005f205c1d0"
 "checksum elasticlunr-rs 2.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "4837d77a1e157489a3933b743fd774ae75074e0e390b2b7f071530048a0d87ee"
+"checksum enum_primitive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "be4551092f4d519593039259a9ed8daedf0da12e5109c5280338073eaeb81180"
 "checksum error-chain 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ff511d5dc435d703f4971bc399647c9bc38e20cb41452e3b9feb4765419ed3f3"
 "checksum filetime 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)" = "714653f3e34871534de23771ac7b26e999651a0a228f47beb324dfdf1dd4b10f"
 "checksum flate2 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "9fac2277e84e5e858483756647a9d0aa8d9a2b7cba517fd84325a0aaa69a0909"
@@ -1793,6 +1958,7 @@ dependencies = [
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 "checksum gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)" = "5e33ec290da0d127825013597dbdfc28bee4964690c7ce1166cbc2a7bd08b1bb"
 "checksum getopts 0.2.17 (registry+https://github.com/rust-lang/crates.io-index)" = "b900c08c1939860ce8b54dc6a89e26e00c04c380fd0e09796799bd7f12861e05"
+"checksum gif 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)" = "e2e41945ba23db3bf51b24756d73d81acb4f28d85c3dccc32c6fae904438c25f"
 "checksum glob 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)" = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
 "checksum globset 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "142754da2c9b3722affd909f9e27f2a6700a7a303f362971e0a74c652005a43d"
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@@ -1800,10 +1966,13 @@ dependencies = [
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 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
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 "checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
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@@ -1812,6 +1981,7 @@ dependencies = [
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@@ -1835,6 +2005,9 @@ dependencies = [
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+"checksum num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)" = "92e5113e9fd4cc14ded8e499429f396a20f98c772a47cc8622a736e1ec843c31"
 "checksum num-traits 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)" = "630de1ef5cc79d0cdd78b7e33b81f083cbfe90de0f4b2b2f07f905867c70e9fe"
 "checksum num_cpus 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c51a3322e4bca9d212ad9a158a02abc6934d005490c054a2778df73a70aa0a30"
 "checksum onig 3.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f5eeb268a4620c74ea5768c6d2ccd492d60a47a8754666b91a46bfc35cd4d1ba"
@@ -1850,6 +2023,7 @@ dependencies = [
 "checksum pkg-config 0.3.11 (registry+https://github.com/rust-lang/crates.io-index)" = "110d5ee3593dbb73f56294327fe5668bcc997897097cbc76b51e7aed3f52452f"
 "checksum plist 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)" = "c61ac2afed2856590ae79d6f358a24b85ece246d2aa134741a66d589519b7503"
 "checksum plugin 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)" = "1a6a0dc3910bc8db877ffed8e457763b317cf880df4ae19109b9f77d277cf6e0"
+"checksum png 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "f0b0cabbbd20c2d7f06dbf015e06aad59b6ca3d9ed14848783e98af9aaf19925"
 "checksum precomputed-hash 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 "checksum proc-macro2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1b06e2f335f48d24442b35a19df506a835fb3547bc3c06ef27340da9acf5cae7"
 "checksum proc-macro2 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "effdb53b25cdad54f8f48843d67398f7ef2e14f12c1b4cb4effc549a6462a4d6"
@@ -1857,7 +2031,9 @@ dependencies = [
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 "checksum quote 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9949cfe66888ffe1d53e6ec9d9f3b70714083854be20fd5e271b232a017401e8"
 "checksum quote 0.6.3 (registry+https://github.com/rust-lang/crates.io-index)" = "e44651a0dc4cdd99f71c83b561e221f714912d11af1a4dff0631f923d53af035"
+"checksum rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)" = "15a732abf9d20f0ad8eeb6f909bf6868722d9a06e1e50802b6a70351f40b4eb1"
 "checksum rand 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)" = "eba5f8cb59cc50ed56be8880a5c7b496bfd9bd26394e176bc67884094145c2c5"
+"checksum rayon 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ed02d09394c94ffbdfdc755ad62a132e94c3224a8354e78a1200ced34df12edf"
 "checksum rayon 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "80e811e76f1dbf68abf87a759083d34600017fc4e10b6bd5ad84a700f9dba4b1"
 "checksum rayon-core 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "9d24ad214285a7729b174ed6d3bcfcb80177807f959d95fafd5bfc5c4f201ac8"
 "checksum redox_syscall 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "c214e91d3ecf43e9a4e41e578973adeb14b474f2bee858742d127af75a0112b1"
@@ -1874,6 +2050,7 @@ dependencies = [
 "checksum same-file 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)" = "cfb6eded0b06a0b512c8ddbcf04089138c9b4362c2f696f3c3d76039d68f3637"
 "checksum sass-rs 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "90f8cf6e645aa843ffffcbdc1e8752b1f221dfa314c81895aeb229a77aea7e05"
 "checksum sass-sys 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "bae88baa915f59c39820e544cfd9296d815a6b8efc3f276a78a0505866d2b4e9"
+"checksum scoped_threadpool 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)" = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
 "checksum sequence_trie 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)" = "32157204e5c9d3c04007bd7e56e96e987635ce0e8e23c085b1e403861b76c351"
 "checksum serde 1.0.66 (registry+https://github.com/rust-lang/crates.io-index)" = "e9a2d9a9ac5120e0f768801ca2b58ad6eec929dc9d1d616c162f208869c2ce95"
@@ -1909,6 +2086,7 @@ dependencies = [
 "checksum time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)" = "d825be0eb33fda1a7e68012d51e9c7f451dc1a69391e7fdc197060bb8c56667b"
 "checksum toml 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "a0263c6c02c4db6c8f7681f9fd35e90de799ebd4cfdeab77a38f4ff6b3d8c0d9"
 "checksum traitobject 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "efd1f82c56340fdf16f2a953d7bda4f8fdffba13d93b00844c25572110b26079"
+"checksum twox-hash 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "475352206e7a290c5fccc27624a163e8d0d115f7bb60ca18a64fc9ce056d7435"
 "checksum typeable 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "1410f6f91f21d1612654e7cc69193b0334f909dcf2c790c4826254fbb86f8887"
 "checksum typemap 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "653be63c80a3296da5551e1bfd2cca35227e13cdd08c6668903ae2f4f77aa1f6"
 "checksum ucd-util 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "fd2be2d6639d0f8fe6cdda291ad456e23629558d466e2789d2c3e9892bda285d"

Cargo.toml

@@ -53,4 +53,5 @@ members = [
     "components/templates",
     "components/utils",
     "components/search",
+    "components/imageproc",
 ]

components/content/Cargo.toml

@@ -14,6 +14,7 @@ config = { path = "../config" }
 utils = { path = "../utils" }
 rendering = { path = "../rendering" }
 front_matter = { path = "../front_matter" }
+imageproc = { path = "../imageproc" }
 
 [dev-dependencies]
 tempfile = "3"

components/content/src/lib.rs

@@ -7,6 +7,7 @@ extern crate errors;
 extern crate config;
 extern crate front_matter;
 extern crate rendering;
+extern crate imageproc;
 extern crate utils;
 
 #[cfg(test)]

components/content/src/page.rs

@@ -15,6 +15,7 @@ use utils::site::get_reading_analytics;
 use utils::templates::render_template;
 use front_matter::{PageFrontMatter, InsertAnchor, split_page_content};
 use rendering::{RenderContext, Header, render_content};
+use imageproc;
 
 use file_info::FileInfo;
 
@@ -162,13 +163,16 @@ impl Page {
     /// We need access to all pages url to render links relative to content
     /// so that can't happen at the same time as parsing
     pub fn render_markdown(&mut self, permalinks: &HashMap<String, String>, tera: &Tera, config: &Config, anchor_insert: InsertAnchor) -> Result<()> {
-        let context = RenderContext::new(
+        let mut context = RenderContext::new(
             tera,
             config,
             &self.permalink,
             permalinks,
             anchor_insert
         );
+
+        context.teracontext.add("page", self);
+
         let res = render_content(
             &self.raw_content.replacen("<!-- more -->", "<a name=\"continue-reading\"></a>", 1),
             &context
@@ -202,6 +206,23 @@ impl Page {
         render_template(&tpl_name, tera, &context, &config.theme)
             .chain_err(|| format!("Failed to render page '{}'", self.file.path.display()))
     }
+
+    /// Creates two vectors of asset URLs. The first one contains all asset files,
+    /// the second one that which appear to be an image file.
+    fn serialize_assets(&self) -> (Vec<String>, Vec<String>) {
+        let mut assets = vec![];
+        let mut images = vec![];
+        for asset in self.assets.iter() {
+            if let Some(filename) = asset.file_name().and_then(|f| f.to_str()) {
+                let url = self.path.clone() + filename;
+                if imageproc::file_is_img(&asset) {
+                    images.push(url.clone());
+                }
+                assets.push(url);
+            }
+        }
+        (assets, images)
+    }
 }
 
 impl Default for Page {
@@ -246,6 +267,9 @@ impl ser::Serialize for Page {
         state.serialize_field("next", &self.next)?;
         state.serialize_field("toc", &self.toc)?;
         state.serialize_field("draft", &self.is_draft())?;
+        let (assets, assets_imgs) = self.serialize_assets();
+        state.serialize_field("assets", &assets)?;
+        state.serialize_field("assets_imgs", &assets_imgs)?;
         state.end()
     }
 }

components/content/src/section.rs

@@ -98,13 +98,16 @@ impl Section {
     /// We need access to all pages url to render links relative to content
     /// so that can't happen at the same time as parsing
     pub fn render_markdown(&mut self, permalinks: &HashMap<String, String>, tera: &Tera, config: &Config) -> Result<()> {
-        let context = RenderContext::new(
+        let mut context = RenderContext::new(
             tera,
             config,
             &self.permalink,
             permalinks,
             self.meta.insert_anchor_links,
         );
+
+        context.teracontext.add("section", self);
+
         let res = render_content(&self.raw_content, &context)
             .chain_err(|| format!("Failed to render content of {}", self.file.path.display()))?;
         self.content = res.0;

components/errors/Cargo.toml

@@ -7,3 +7,4 @@ authors = ["Vincent Prouillet <prouillet.vincent@gmail.com>"]
 error-chain = "0.11"
 tera = "0.11"
 toml = "0.4"
+image = "0.18.0"

components/errors/src/lib.rs

@@ -4,6 +4,7 @@
 extern crate error_chain;
 extern crate tera;
 extern crate toml;
+extern crate image;
 
 error_chain! {
     errors {}
@@ -15,6 +16,7 @@ error_chain! {
     foreign_links {
         Io(::std::io::Error);
         Toml(toml::de::Error);
+        Image(image::ImageError);
     }
 }
 

components/imageproc/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "imageproc"
+version = "0.1.0"
+authors = ["Vojtěch Král <vojtech@kral.hk>"]
+
+[dependencies]
+lazy_static = "1"
+regex = "0.2"
+tera = "0.11.0"
+image = "0.18.0"
+rayon = "0.9"
+twox-hash = "1.1"
+
+errors = { path = "../errors" }
+utils = { path = "../utils" }

components/imageproc/src/lib.rs

@@ -0,0 +1,327 @@
+#[macro_use]
+extern crate lazy_static;
+extern crate regex;
+extern crate image;
+extern crate rayon;
+extern crate twox_hash;
+
+extern crate utils;
+extern crate errors;
+
+use std::path::{Path, PathBuf};
+use std::hash::{Hash, Hasher};
+use std::collections::HashMap;
+use std::collections::hash_map::Entry as HEntry;
+use std::fs::{self, File};
+
+use regex::Regex;
+use image::{GenericImage, FilterType};
+use image::jpeg::JPEGEncoder;
+use rayon::prelude::*;
+use twox_hash::XxHash;
+
+use utils::fs as ufs;
+use errors::{Result, ResultExt};
+
+
+static RESIZED_SUBDIR: &'static str = "_resized_images";
+lazy_static!{
+    pub static ref RESIZED_FILENAME: Regex = Regex::new(r#"([0-9a-f]{16})([0-9a-f]{2})[.]jpg"#).unwrap();
+}
+
+/// Describes the precise kind of a resize operation
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ResizeOp {
+    /// A simple scale operation that doesn't take aspect ratio into account
+    Scale(u32, u32),
+    /// Scales the image to a specified width with height computed such that aspect ratio is preserved
+    FitWidth(u32),
+    /// Scales the image to a specified height with width computed such that aspect ratio is preserved
+    FitHeight(u32),
+    /// Scales the image such that it fits within the specified width and height preserving aspect ratio.
+    /// Either dimension may end up being smaller, but never larger than specified.
+    Fit(u32, u32),
+    /// Scales the image such that it fills the specified width and height. Output will always have the exact dimensions specified.
+    /// The part of the image that doesn't fit in the thumbnail due to differing aspect ratio will be cropped away, if any.
+    Fill(u32, u32),
+}
+
+impl ResizeOp {
+    pub fn from_args(op: &str, width: Option<u32>, height: Option<u32>) -> Result<ResizeOp> {
+        use ResizeOp::*;
+
+        // Validate args:
+        match op {
+            "fitwidth" => if width.is_none() { return Err(format!("op=fitwidth requires a `width` argument").into()) },
+            "fitheight" => if height.is_none() { return Err(format!("op=fitwidth requires a `height` argument").into()) },
+            "scale" | "fit" | "fill" => if width.is_none() || height.is_none() {
+                return Err(format!("op={} requires a `width` and `height` argument", op).into())
+            },
+            _ => return Err(format!("Invalid image resize operation: {}", op).into())
+        };
+
+        Ok(match op {
+            "scale" => Scale(width.unwrap(), height.unwrap()),
+            "fitwidth" => FitWidth(width.unwrap()),
+            "fitheight" => FitHeight(height.unwrap()),
+            "fit" => Fit(width.unwrap(), height.unwrap()),
+            "fill" => Fill(width.unwrap(), height.unwrap()),
+            _ => unreachable!(),
+        })
+    }
+
+    pub fn width(self) -> Option<u32> {
+        use ResizeOp::*;
+
+        match self {
+            Scale(w, _) => Some(w),
+            FitWidth(w) => Some(w),
+            FitHeight(_) => None,
+            Fit(w, _) => Some(w),
+            Fill(w, _) => Some(w),
+        }
+    }
+
+    pub fn height(self) -> Option<u32> {
+        use ResizeOp::*;
+
+        match self {
+            Scale(_, h) => Some(h),
+            FitWidth(_) => None,
+            FitHeight(h) => Some(h),
+            Fit(_, h) => Some(h),
+            Fill(_, h) => Some(h),
+        }
+    }
+}
+
+impl From<ResizeOp> for u8 {
+    fn from(op: ResizeOp) -> u8 {
+        use ResizeOp::*;
+
+        match op {
+            Scale(_, _) => 1,
+            FitWidth(_) => 2,
+            FitHeight(_) => 3,
+            Fit(_, _) => 4,
+            Fill(_, _) => 5,
+        }
+    }
+}
+
+impl Hash for ResizeOp {
+    fn hash<H: Hasher>(&self, hasher: &mut H) {
+        hasher.write_u8(u8::from(*self));
+        if let Some(w) = self.width()  { hasher.write_u32(w); }
+        if let Some(h) = self.height() { hasher.write_u32(h); }
+    }
+}
+
+/// Holds all data needed to perform a resize operation
+#[derive(Debug, PartialEq, Eq)]
+pub struct ImageOp {
+    source: String,
+    op: ResizeOp,
+    quality: u8,
+    hash: u64,
+    collision: Option<u32>,
+}
+
+impl ImageOp {
+    pub fn new(source: String, op: ResizeOp, quality: u8) -> ImageOp {
+        let mut hasher = XxHash::with_seed(0);
+        hasher.write(source.as_ref());
+        op.hash(&mut hasher);
+        hasher.write_u8(quality);
+        let hash = hasher.finish();
+
+        ImageOp { source, op, quality, hash, collision: None }
+    }
+
+    pub fn from_args(source: String, op: &str, width: Option<u32>, height: Option<u32>, quality: u8) -> Result<ImageOp> {
+        let op = ResizeOp::from_args(op, width, height)?;
+        Ok(Self::new(source, op, quality))
+    }
+
+    fn num_colli(&self) -> u32 { self.collision.unwrap_or(0) }
+
+    fn perform(&self, content_path: &Path, target_path: &Path) -> Result<()> {
+        use ResizeOp::*;
+
+        let src_path = content_path.join(&self.source);
+        if !ufs::file_stale(&src_path, target_path) {
+            return Ok(())
+        }
+
+        let mut img = image::open(&src_path)?;
+        let (img_w, img_h) = img.dimensions();
+
+        const RESIZE_FILTER: FilterType = FilterType::Gaussian;
+        const RATIO_EPSILLION: f32 = 0.1;
+
+        let img = match self.op {
+            Scale(w, h) => img.resize_exact(w, h, RESIZE_FILTER),
+            FitWidth(w) => img.resize(w, u32::max_value(), RESIZE_FILTER),
+            FitHeight(h) => img.resize(u32::max_value(), h, RESIZE_FILTER),
+            Fit(w, h) => img.resize(w, h, RESIZE_FILTER),
+            Fill(w, h) => {
+                let fw = img_w as f32 / w as f32;
+                let fh = img_h as f32 / h as f32;
+
+                if (fw - fh).abs() <= RATIO_EPSILLION {
+                    // The aspect is similar enough that there's not much point in cropping
+                    img.resize_exact(w, h, RESIZE_FILTER)
+                } else {
+                    // We perform the fill such that a crop is performed first and then resize_exact can be used,
+                    // which should be cheaper than resizing and then cropping (smaller number of pixels to resize).
+                    let (crop_w, crop_h) = match fw < fh {
+                        true  => (img_w, (fw * h as f32).round() as u32),
+                        false => ((fh * w as f32).round() as u32, img_h),
+                    };
+                    let (off_w, off_h) = match fw < fh {
+                        true  => (0, (img_h - crop_h) / 2),
+                        false => ((img_w - crop_w) / 2, 0),
+                    };
+                    img.crop(off_w, off_h, crop_w, crop_h).resize_exact(w, h, RESIZE_FILTER)
+                }
+            },
+        };
+
+        let mut f = File::create(target_path)?;
+        let mut enc = JPEGEncoder::new_with_quality(&mut f, self.quality);
+        let (img_w, img_h) = img.dimensions();
+        enc.encode(&img.raw_pixels(), img_w, img_h, img.color())?;
+        Ok(())
+    }
+}
+
+
+/// A strcture into which image operations can be enqueued and then performed.
+/// All output is written in a subdirectory in `static_path`,
+/// taking care of file stale status based on timestamps and possible hash collisions.
+#[derive(Debug)]
+pub struct Processor {
+    content_path: PathBuf,
+    resized_path: PathBuf,
+    resized_url: String,
+    img_ops: HashMap<u64, ImageOp>,
+    // Hash collisions go here:
+    img_ops_colls: Vec<ImageOp>,
+}
+
+impl Processor {
+    pub fn new(content_path: PathBuf, static_path: &Path, base_url: &str) -> Processor {
+        Processor {
+            content_path,
+            resized_path: static_path.join(RESIZED_SUBDIR),
+            resized_url: Self::resized_url(base_url),
+            img_ops: HashMap::new(),
+            img_ops_colls: Vec::new(),
+        }
+    }
+
+    fn resized_url(base_url: &str) -> String {
+        match base_url.ends_with('/') {
+            true  => format!("{}{}", base_url, RESIZED_SUBDIR),
+            false => format!("{}/{}", base_url, RESIZED_SUBDIR),
+        }
+    }
+
+    pub fn set_base_url(&mut self, base_url: &str) {
+        self.resized_url = Self::resized_url(base_url);
+    }
+
+    pub fn source_exists(&self, source: &str) -> bool {
+        self.content_path.join(source).exists()
+    }
+
+    pub fn num_img_ops(&self) -> usize {
+        self.img_ops.len() + self.img_ops_colls.len()
+    }
+
+    fn insert_with_colls(&mut self, mut img_op: ImageOp) -> u32 {
+        match self.img_ops.entry(img_op.hash) {
+            HEntry::Occupied(entry) => if *entry.get() == img_op { return 0; },
+            HEntry::Vacant(entry) => {
+                entry.insert(img_op);
+                return 0;
+            },
+        }
+
+        // If we get here, that means a hash collision.
+        let mut num = 1;
+        for op in self.img_ops_colls.iter().filter(|op| op.hash == img_op.hash) {
+            if *op == img_op {
+                return num;
+            } else {
+                num += 1;
+            }
+        }
+
+        if num == 1 {
+            self.img_ops.get_mut(&img_op.hash).unwrap().collision = Some(0);
+        }
+        img_op.collision = Some(num);
+        self.img_ops_colls.push(img_op);
+        num
+    }
+
+    fn op_filename(hash: u64, colli_num: u32) -> String {
+        // Please keep this in sync with RESIZED_FILENAME
+        assert!(colli_num < 256, "Unexpectedly large number of collisions: {}", colli_num);
+        format!("{:016x}{:02x}.jpg", hash, colli_num)
+    }
+
+    fn op_url(&self, hash: u64, colli_num: u32) -> String {
+        format!("{}/{}", &self.resized_url, Self::op_filename(hash, colli_num))
+    }
+
+    pub fn insert(&mut self, img_op: ImageOp) -> String {
+        let hash = img_op.hash;
+        let num_colli = self.insert_with_colls(img_op);
+        self.op_url(hash, num_colli)
+    }
+
+    pub fn prune(&self) -> Result<()> {
+        ufs::ensure_directory_exists(&self.resized_path)?;
+        let entries = fs::read_dir(&self.resized_path)?;
+        for entry in entries {
+            let entry_path = entry?.path();
+            if entry_path.is_file() {
+                let filename = entry_path.file_name().unwrap().to_string_lossy();
+                if let Some(capts) = RESIZED_FILENAME.captures(filename.as_ref()) {
+                    let hash = u64::from_str_radix(capts.get(1).unwrap().as_str(), 16).unwrap();
+                    let num_colli = u32::from_str_radix(capts.get(2).unwrap().as_str(), 16).unwrap();
+                    if num_colli > 0 || !self.img_ops.contains_key(&hash) {
+                        fs::remove_file(&entry_path)?;
+                    }
+                }
+            }
+        }
+        Ok(())
+    }
+
+    pub fn do_process(&mut self) -> Result<()> {
+        self.img_ops.par_iter().map(|(hash, op)| {
+            let target = self.resized_path.join(Self::op_filename(*hash, op.num_colli()));
+            op.perform(&self.content_path, &target)
+                .chain_err(|| format!("Failed to process image: {}", op.source))
+        })
+        .fold(|| Ok(()), Result::and)
+        .reduce(|| Ok(()), Result::and)
+    }
+}
+
+
+/// Looks at file's extension and returns whether it's a supported image format
+pub fn file_is_img<P: AsRef<Path>>(p: P) -> bool {
+    p.as_ref().extension().and_then(|s| s.to_str()).map(|ext| {
+        match ext.to_lowercase().as_str() {
+            "jpg" | "jpeg" => true,
+            "png" => true,
+            "gif" => true,
+            "bmp" => true,
+            _ => false,
+        }
+    }).unwrap_or(false)
+}

components/rendering/src/context.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use tera::Tera;
+use tera::{Tera, Context};
 use front_matter::InsertAnchor;
 use config::Config;
 
@@ -10,6 +10,7 @@ use config::Config;
 pub struct RenderContext<'a> {
     pub tera: &'a Tera,
     pub config: &'a Config,
+    pub teracontext: Context,
     pub current_page_permalink: &'a str,
     pub permalinks: &'a HashMap<String, String>,
     pub insert_anchor: InsertAnchor,
@@ -23,8 +24,11 @@ impl<'a> RenderContext<'a> {
         permalinks: &'a HashMap<String, String>,
         insert_anchor: InsertAnchor,
     ) -> RenderContext<'a> {
+        let mut teracontext = Context::new();
+        teracontext.insert("config", config);
         RenderContext {
             tera,
+            teracontext,
             current_page_permalink,
             permalinks,
             insert_anchor,

components/rendering/src/lib.rs

@@ -34,7 +34,7 @@ pub use context::RenderContext;
 pub fn render_content(content: &str,  context: &RenderContext) -> Result<(String, Vec<Header>)> {
     // Don't do anything if there is nothing like a shortcode in the content
     if content.contains("{{") || content.contains("{%") {
-        let rendered = render_shortcodes(content, context.tera, context.config)?;
+        let rendered = render_shortcodes(content, context)?;
         return markdown_to_html(&rendered, context);
     }
 

components/rendering/src/shortcode.rs

@@ -1,9 +1,9 @@
 use pest::Parser;
 use pest::iterators::Pair;
-use tera::{Tera, Map, Context, Value, to_value};
+use tera::{Map, Context, Value, to_value};
 
 use errors::{Result, ResultExt};
-use config::Config;
+use ::context::RenderContext;
 
 // This include forces recompiling this source file if the grammar file changes.
 // Uncomment it when doing changes to the .pest file
@@ -84,20 +84,20 @@ fn parse_shortcode_call(pair: Pair<Rule>) -> (String, Map<String, Value>) {
 }
 
 
-fn render_shortcode(name: String, args: Map<String, Value>, tera: &Tera, config: &Config, body: Option<&str>) -> Result<String> {
+fn render_shortcode(name: String, args: Map<String, Value>, context: &RenderContext, body: Option<&str>) -> Result<String> {
-    let mut context = Context::new();
+    let mut teracontext = Context::new();
     for (key, value) in args.iter() {
-        context.insert(key, value);
+        teracontext.insert(key, value);
     }
     if let Some(ref b) = body {
         // Trimming right to avoid most shortcodes with bodies ending up with a HTML new line
-        context.insert("body", b.trim_right());
+        teracontext.insert("body", b.trim_right());
     }
-    context.insert("config", config);
+    teracontext.extend(context.teracontext.clone());
     let tpl_name = format!("shortcodes/{}.html", name);
 
-    let res = tera
+    let res = context.tera
-        .render(&tpl_name, &context)
+        .render(&tpl_name, &teracontext)
         .chain_err(|| format!("Failed to render {} shortcode", name))?;
 
     // We trim left every single line of a shortcode to avoid the accidental
@@ -105,7 +105,7 @@ fn render_shortcode(name: String, args: Map<String, Value>, tera: &Tera, config:
     Ok(res.lines().map(|s| s.trim_left()).collect())
 }
 
-pub fn render_shortcodes(content: &str, tera: &Tera, config: &Config) -> Result<String> {
+pub fn render_shortcodes(content: &str, context: &RenderContext) -> Result<String> {
     let mut res = String::with_capacity(content.len());
 
     let mut pairs = match ContentParser::parse(Rule::page, content) {
@@ -138,7 +138,7 @@ pub fn render_shortcodes(content: &str, tera: &Tera, config: &Config) -> Result<
             Rule::text | Rule::text_in_ignored_body_sc | Rule::text_in_body_sc => res.push_str(p.into_span().as_str()),
             Rule::inline_shortcode => {
                 let (name, args) = parse_shortcode_call(p);
-                res.push_str(&render_shortcode(name, args, tera, config, None)?);
+                res.push_str(&render_shortcode(name, args, context, None)?);
             },
             Rule::shortcode_with_body => {
                 let mut inner = p.into_inner();
@@ -146,7 +146,7 @@ pub fn render_shortcodes(content: &str, tera: &Tera, config: &Config) -> Result<
                 // we don't care about the closing tag
                 let (name, args) = parse_shortcode_call(inner.next().unwrap());
                 let body = inner.next().unwrap().into_span().as_str();
-                res.push_str(&render_shortcode(name, args, tera, config, Some(body))?);
+                res.push_str(&render_shortcode(name, args, context, Some(body))?);
             },
             Rule::ignored_inline_shortcode => {
               res.push_str(
@@ -179,6 +179,10 @@ pub fn render_shortcodes(content: &str, tera: &Tera, config: &Config) -> Result<
 
 #[cfg(test)]
 mod tests {
+    use std::collections::HashMap;
+    use tera::Tera;
+    use config::Config;
+    use front_matter::InsertAnchor;
     use super::*;
 
     macro_rules! assert_lex_rule {
@@ -195,6 +199,13 @@ mod tests {
         };
     }
 
+    fn render_shortcodes(code: &str, tera: &Tera) -> String {
+        let config = Config::default();
+        let permalinks = HashMap::new();
+        let context = RenderContext::new(&tera, &config, "", &permalinks, InsertAnchor::None);
+        super::render_shortcodes(code, &context).unwrap()
+    }
+
     #[test]
     fn lex_text() {
         let inputs = vec!["Hello world", "HEllo \n world", "Hello 1 2 true false 'hey'"];
@@ -281,26 +292,22 @@ mod tests {
 
     #[test]
     fn does_nothing_with_no_shortcodes() {
-        let res = render_shortcodes("Hello World", &Tera::default(), &Config::default());
+        let res = render_shortcodes("Hello World", &Tera::default());
-        assert_eq!(res.unwrap(), "Hello World");
+        assert_eq!(res, "Hello World");
     }
 
     #[test]
     fn can_unignore_inline_shortcode() {
-        let res = render_shortcodes(
+        let res = render_shortcodes("Hello World {{/* youtube() */}}", &Tera::default());
-            "Hello World {{/* youtube() */}}",
+        assert_eq!(res, "Hello World {{ youtube() }}");
-            &Tera::default(),
-            &Config::default(),
-        );
-        assert_eq!(res.unwrap(), "Hello World {{ youtube() }}");
     }
 
     #[test]
     fn can_unignore_shortcode_with_body() {
         let res = render_shortcodes(r#"
 Hello World
-{%/* youtube() */%}Some body {{ hello() }}{%/* end */%}"#, &Tera::default(), &Config::default());
+{%/* youtube() */%}Some body {{ hello() }}{%/* end */%}"#, &Tera::default());
-        assert_eq!(res.unwrap(), "\nHello World\n{% youtube() %}Some body {{ hello() }}{% end %}");
+        assert_eq!(res, "\nHello World\n{% youtube() %}Some body {{ hello() }}{% end %}");
     }
 
     #[test]
@@ -343,7 +350,7 @@ Hello World
     fn can_render_inline_shortcodes() {
         let mut tera = Tera::default();
         tera.add_raw_template("shortcodes/youtube.html", "Hello {{id}}").unwrap();
-        let res = render_shortcodes("Inline {{ youtube(id=1) }}.", &tera, &Config::default()).unwrap();
+        let res = render_shortcodes("Inline {{ youtube(id=1) }}.", &tera);
         assert_eq!(res, "Inline Hello 1.");
     }
 
@@ -351,7 +358,7 @@ Hello World
     fn can_render_shortcodes_with_body() {
         let mut tera = Tera::default();
         tera.add_raw_template("shortcodes/youtube.html", "{{body}}").unwrap();
-        let res = render_shortcodes("Body\n {% youtube() %}Hey!{% end %}", &tera, &Config::default()).unwrap();
+        let res = render_shortcodes("Body\n {% youtube() %}Hey!{% end %}", &tera);
         assert_eq!(res, "Body\n Hey!");
     }
 }

components/site/Cargo.toml

@@ -20,6 +20,7 @@ pagination = { path = "../pagination" }
 taxonomies = { path = "../taxonomies" }
 content = { path = "../content" }
 search = { path = "../search" }
+imageproc = { path = "../imageproc" }
 
 [dev-dependencies]
 tempfile = "3"

components/site/src/lib.rs

@@ -16,6 +16,7 @@ extern crate pagination;
 extern crate taxonomies;
 extern crate content;
 extern crate search;
+extern crate imageproc;
 
 #[cfg(test)]
 extern crate tempfile;
@@ -24,6 +25,7 @@ use std::collections::HashMap;
 use std::fs::{create_dir_all, remove_dir_all, copy};
 use std::mem;
 use std::path::{Path, PathBuf};
+use std::sync::{Arc, Mutex};
 
 use glob::glob;
 use tera::{Tera, Context};
@@ -66,9 +68,11 @@ pub struct Site {
     pub pages: HashMap<PathBuf, Page>,
     pub sections: HashMap<PathBuf, Section>,
     pub tera: Tera,
+    imageproc: Arc<Mutex<imageproc::Processor>>,
     // the live reload port to be used if there is one
     pub live_reload: Option<u16>,
     pub output_path: PathBuf,
+    content_path: PathBuf,
     pub static_path: PathBuf,
     pub tags: Option<Taxonomy>,
     pub categories: Option<Taxonomy>,
@@ -109,15 +113,21 @@ impl Site {
         // the `extend` above already does it but hey
         tera.build_inheritance_chains()?;
 
+        let content_path = path.join("content");
+        let static_path = path.join("static");
+        let imageproc = imageproc::Processor::new(content_path.clone(), &static_path, &config.base_url);
+
         let site = Site {
             base_path: path.to_path_buf(),
             config,
             tera,
             pages: HashMap::new(),
             sections: HashMap::new(),
+            imageproc: Arc::new(Mutex::new(imageproc)),
             live_reload: None,
             output_path: path.join("public"),
-            static_path: path.join("static"),
+            content_path,
+            static_path,
             tags: None,
             categories: None,
             permalinks: HashMap::new(),
@@ -128,7 +138,7 @@ impl Site {
 
     /// The index section is ALWAYS at that path
     pub fn index_section_path(&self) -> PathBuf {
-        self.base_path.join("content").join("_index.md")
+        self.content_path.join("_index.md")
     }
 
     pub fn enable_live_reload(&mut self) {
@@ -153,6 +163,12 @@ impl Site {
         orphans
     }
 
+    pub fn set_base_url(&mut self, base_url: String) {
+        let mut imageproc = self.imageproc.lock().unwrap();
+        imageproc.set_base_url(&base_url);
+        self.config.base_url = base_url;
+    }
+
     pub fn set_output_path<P: AsRef<Path>>(&mut self, path: P) {
         self.output_path = path.as_ref().to_path_buf();
     }
@@ -217,7 +233,7 @@ impl Site {
         if !self.sections.contains_key(&index_path) {
             let mut index_section = Section::default();
             index_section.permalink = self.config.make_permalink("");
-            index_section.file.parent = self.base_path.join("content");
+            index_section.file.parent = self.content_path.clone();
             index_section.file.relative = "_index.md".to_string();
             self.sections.insert(index_path, index_section);
         }
@@ -229,10 +245,10 @@ impl Site {
             self.add_page(p, false)?;
         }
 
+        self.register_early_global_fns();
         self.render_markdown()?;
         self.populate_sections();
         self.populate_tags_and_categories();
-
         self.register_tera_global_fns();
 
         Ok(())
@@ -270,6 +286,16 @@ impl Site {
         Ok(())
     }
 
+    /// Adds global fns that are to be available to shortcodes while rendering markdown
+    pub fn register_early_global_fns(&mut self) {
+        self.tera.register_global_function(
+            "get_url", global_fns::make_get_url(self.permalinks.clone(), self.config.clone())
+        );
+        self.tera.register_global_function(
+            "resize_image", global_fns::make_resize_image(self.imageproc.clone())
+        );
+    }
+
     pub fn register_tera_global_fns(&mut self) {
         self.tera.register_global_function("trans", global_fns::make_trans(self.config.clone()));
         self.tera.register_global_function("get_page", global_fns::make_get_page(&self.pages));
@@ -278,10 +304,6 @@ impl Site {
             "get_taxonomy_url",
             global_fns::make_get_taxonomy_url(self.tags.clone(), self.categories.clone())
         );
-        self.tera.register_global_function(
-            "get_url",
-            global_fns::make_get_url(self.permalinks.clone(), self.config.clone())
-        );
     }
 
     /// Add a page to the site
@@ -441,6 +463,17 @@ impl Site {
         Ok(())
     }
 
+    pub fn num_img_ops(&self) -> usize {
+        let imageproc = self.imageproc.lock().unwrap();
+        imageproc.num_img_ops()
+    }
+
+    pub fn process_images(&self) -> Result<()> {
+        let mut imageproc = self.imageproc.lock().unwrap();
+        imageproc.prune()?;
+        imageproc.do_process()
+    }
+
     /// Deletes the `public` directory if it exists
     pub fn clean(&self) -> Result<()> {
         if self.output_path.exists() {
@@ -510,6 +543,7 @@ impl Site {
             self.compile_sass(&self.base_path)?;
         }
 
+        self.process_images()?;
         self.copy_static_directories()?;
 
         if self.config.build_search_index {
@@ -820,7 +854,7 @@ impl Site {
     /// Used only on reload
     pub fn render_index(&self) -> Result<()> {
         self.render_section(
-            &self.sections[&self.base_path.join("content").join("_index.md")],
+            &self.sections[&self.content_path.join("_index.md")],
             false
         )
     }

components/templates/Cargo.toml

@@ -14,3 +14,4 @@ utils = { path = "../utils" }
 content = { path = "../content" }
 config = { path = "../config" }
 taxonomies = { path = "../taxonomies" }
+imageproc = { path = "../imageproc" }

components/templates/src/global_fns.rs

@@ -1,5 +1,6 @@
 use std::collections::HashMap;
-use std::path::{PathBuf};
+use std::path::PathBuf;
+use std::sync::{Arc, Mutex};
 
 use tera::{GlobalFn, Value, from_value, to_value, Result};
 
@@ -7,29 +8,41 @@ use content::{Page, Section};
 use config::Config;
 use utils::site::resolve_internal_link;
 use taxonomies::Taxonomy;
+use imageproc;
 
 
-macro_rules! required_string_arg {
+macro_rules! required_arg {
-    ($e: expr, $err: expr) => {
+    ($ty: ty, $e: expr, $err: expr) => {
         match $e {
-            Some(v) => match from_value::<String>(v.clone()) {
+            Some(v) => match from_value::<$ty>(v.clone()) {
                 Ok(u) => u,
                 Err(_) => return Err($err.into())
             },
             None => return Err($err.into())
+        }
     };
+}
+
+macro_rules! optional_arg {
+    ($ty: ty, $e: expr, $err: expr) => {
+        match $e {
+            Some(v) => match from_value::<$ty>(v.clone()) {
+                Ok(u) => Some(u),
+                Err(_) => return Err($err.into())
+            },
+            None => None
+        }
     };
 }
 
 
 pub fn make_trans(config: Config) -> GlobalFn {
     let translations_config = config.translations;
-    let default_lang = to_value(config.default_language).unwrap();
+    let default_lang = config.default_language.clone();
 
     Box::new(move |args| -> Result<Value> {
-        let key = required_string_arg!(args.get("key"), "`trans` requires a `key` argument.");
+        let key = required_arg!(String, args.get("key"), "`trans` requires a `key` argument.");
-        let lang_arg = args.get("lang").unwrap_or(&default_lang).clone();
+        let lang = optional_arg!(String, args.get("lang"), "`trans`: `lang` must be a string.").unwrap_or(default_lang.clone());
-        let lang = from_value::<String>(lang_arg).unwrap();
         let translations = &translations_config[lang.as_str()];
         Ok(to_value(&translations[key.as_str()]).unwrap())
     })
@@ -43,7 +56,7 @@ pub fn make_get_page(all_pages: &HashMap<PathBuf, Page>) -> GlobalFn {
     }
 
     Box::new(move |args| -> Result<Value> {
-        let path = required_string_arg!(args.get("path"), "`get_page` requires a `path` argument with a string value");
+        let path = required_arg!(String, args.get("path"), "`get_page` requires a `path` argument with a string value");
         match pages.get(&path) {
             Some(p) => Ok(to_value(p).unwrap()),
             None => Err(format!("Page `{}` not found.", path).into())
@@ -61,7 +74,7 @@ pub fn make_get_section(all_sections: &HashMap<PathBuf, Section>) -> GlobalFn {
     }
 
     Box::new(move |args| -> Result<Value> {
-        let path = required_string_arg!(args.get("path"), "`get_section` requires a `path` argument with a string value");
+        let path = required_arg!(String, args.get("path"), "`get_section` requires a `path` argument with a string value");
         //println!("Found {:#?}", sections.get(&path).unwrap().pages[0]);
         match sections.get(&path) {
             Some(p) => Ok(to_value(p).unwrap()),
@@ -84,7 +97,7 @@ pub fn make_get_url(permalinks: HashMap<String, String>, config: Config) -> Glob
                 from_value::<bool>(c.clone()).unwrap_or(true)
             });
 
-        let path = required_string_arg!(args.get("path"), "`get_url` requires a `path` argument with a string value");
+        let path = required_arg!(String, args.get("path"), "`get_url` requires a `path` argument with a string value");
         if path.starts_with("./") {
             match resolve_internal_link(&path, &permalinks) {
                 Ok(url) => Ok(to_value(url).unwrap()),
@@ -107,8 +120,8 @@ pub fn make_get_url(permalinks: HashMap<String, String>, config: Config) -> Glob
 
 pub fn make_get_taxonomy_url(tags: Option<Taxonomy>, categories: Option<Taxonomy>) -> GlobalFn {
     Box::new(move |args| -> Result<Value> {
-        let kind = required_string_arg!(args.get("kind"), "`get_taxonomy_url` requires a `kind` argument with a string value");
+        let kind = required_arg!(String, args.get("kind"), "`get_taxonomy_url` requires a `kind` argument with a string value");
-        let name = required_string_arg!(args.get("name"), "`get_taxonomy_url` requires a `name` argument with a string value");
+        let name = required_arg!(String, args.get("name"), "`get_taxonomy_url` requires a `name` argument with a string value");
         let container = match kind.as_ref() {
             "tag" => &tags,
             "category" => &categories,
@@ -128,6 +141,33 @@ pub fn make_get_taxonomy_url(tags: Option<Taxonomy>, categories: Option<Taxonomy
     })
 }
 
+pub fn make_resize_image(imageproc: Arc<Mutex<imageproc::Processor>>) -> GlobalFn {
+    static DEFAULT_OP: &'static str = "fill";
+    const DEFAULT_Q: u8 = 75;
+
+    Box::new(move |args| -> Result<Value> {
+        let path = required_arg!(String, args.get("path"), "`resize_image` requires a `path` argument with a string value");
+        let width = optional_arg!(u32, args.get("width"), "`resize_image`: `width` must be a non-negative integer");
+        let height = optional_arg!(u32, args.get("height"), "`resize_image`: `height` must be a non-negative integer");
+        let op = optional_arg!(String, args.get("op"), "`resize_image`: `op` must be a string").unwrap_or(DEFAULT_OP.to_owned());
+        let quality = optional_arg!(u8, args.get("quality"), "`resize_image`: `quality` must be a number").unwrap_or(DEFAULT_Q);
+        if quality == 0 || quality > 100 {
+            return Err("`resize_image`: `quality` must be in range 1-100".to_string().into());
+        }
+
+        let mut imageproc = imageproc.lock().unwrap();
+        if !imageproc.source_exists(&path) {
+            return Err(format!("`resize_image`: Cannot find path: {}", path).into());
+        }
+
+        let imageop = imageproc::ImageOp::from_args(path.clone(), &op, width, height, quality).map_err(|e| format!("`resize_image`: {}", e))?;
+        let url = imageproc.insert(imageop);
+
+        to_value(url).map_err(|err| err.into())
+    })
+}
+
+
 #[cfg(test)]
 mod tests {
     use super::{make_get_url, make_get_taxonomy_url, make_trans};

components/templates/src/lib.rs

@@ -11,6 +11,7 @@ extern crate utils;
 extern crate content;
 extern crate config;
 extern crate taxonomies;
+extern crate imageproc;
 
 pub mod filters;
 pub mod global_fns;

components/utils/src/fs.rs

@@ -93,6 +93,32 @@ pub fn copy_directory(src: &PathBuf, dest: &PathBuf) -> Result<()> {
     Ok(())
 }
 
+/// Compares source and target files' timestamps and returns true if the source file
+/// has been created _or_ updated after the target file has
+pub fn file_stale<PS, PT>(p_source: PS, p_target: PT) -> bool where PS: AsRef<Path>, PT: AsRef<Path> {
+    let p_source = p_source.as_ref();
+    let p_target = p_target.as_ref();
+
+    if ! p_target.exists() {
+        return true;
+    }
+
+    let get_time = |path: &Path| path.metadata().ok().and_then(|meta| {
+        Some(match (meta.created().ok(), meta.modified().ok()) {
+            (Some(tc), Some(tm)) => tc.max(tm),
+            (Some(tc), None) => tc,
+            (None, Some(tm)) => tm,
+            (None, None) => return None,
+        })
+    });
+
+    let time_source = get_time(p_source);
+    let time_target = get_time(p_target);
+
+    time_source.and_then(|ts| time_target.map(|tt| ts > tt)).unwrap_or(true)
+}
+
+
 #[cfg(test)]
 mod tests {
     use std::fs::File;

docs/content/documentation/content/image-resizing/index.md

@@ -0,0 +1,8 @@
++++
+title = "Image Resizing"
+weight = 120
++++
+
+TODO: talk about resize_image
+
+{{ gallery() }}

docs/content/documentation/templates/pages-sections.md

@@ -37,6 +37,7 @@ previous: Page?;
 next: Page?;
 // See the Table of contents section below for more details
 toc: Array<Header>;
+// TODO: add assets & assets_imgs   (also draft is missing?)
 ```
 
 ## Section variables

docs/templates/shortcodes/gallery.html

@@ -0,0 +1,6 @@
+{% for img in page.assets_imgs %}
+  <a href="{{ config.base_url }}/{{ img }}">
+    <img src="{{ resize_image(path=img, width=240, height=180, op="fill") }}" />
+  </a>
+  &ensp;
+{% endfor %}

docs/templates/shortcodes/resize_image.html

@@ -0,0 +1 @@
+<img src="{{ resize_image(path=path, width=width, height=height, op=op) }}" />

src/cmd/serve.rs

@@ -86,13 +86,13 @@ fn create_new_site(interface: &str, port: &str, output_dir: &str, base_url: &str
 
     let base_address = format!("{}:{}", base_url, port);
     let address = format!("{}:{}", interface, port);
-
+    let base_url = if site.config.base_url.ends_with('/') {
-    site.config.base_url = if site.config.base_url.ends_with('/') {
         format!("http://{}/", base_address)
     } else {
         format!("http://{}", base_address)
     };
 
+    site.set_base_url(base_url);
     site.set_output_path(output_dir);
     site.load()?;
     site.enable_live_reload();

src/console.rs

@@ -27,10 +27,11 @@ pub fn error(message: &str) {
 /// Display in the console the number of pages/sections in the site
 pub fn notify_site_size(site: &Site) {
     println!(
-        "-> Creating {} pages ({} orphan) and {} sections",
+        "-> Creating {} pages ({} orphan), {} sections, and processing {} images",
         site.pages.len(),
         site.get_all_orphan_pages().len(),
         site.sections.len() - 1, // -1 since we do not the index as a section
+        site.num_img_ops(),
     );
 }