mirror of
https://github.com/nushell/nushell
synced 2024-12-27 05:23:11 +00:00
Add 'detect columns' command (#4127)
* Add 'detect columns' command * Fix warnings
This commit is contained in:
JT
GitHub
parent
f2f01b8a4d
commit
df87d90b8c
5 changed files with 326 additions and 128 deletions
165
Cargo.lock
generated
165
Cargo.lock
generated
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@ -109,7 +109,7 @@ checksum = "47044a1809e2953fe6d084312b81dcb7d9ffc24fee45aa39e5b938f66f75b8a8"
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dependencies = [
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"clipboard-win",
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"core-graphics",
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"image 0.23.14",
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"image",
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"log",
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"objc",
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"objc-foundation",
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@ -168,18 +168,6 @@ dependencies = [
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"strength_reduce",
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]
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[[package]]
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name = "as-slice"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "45403b49e3954a4b8428a0ac21a4b7afadccf92bfd96273f1a58cd4812496ae0"
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dependencies = [
|
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"generic-array 0.12.4",
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"generic-array 0.13.3",
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"generic-array 0.14.4",
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"stable_deref_trait",
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]
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[[package]]
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name = "async-stream"
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version = "0.3.2"
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@ -355,7 +343,7 @@ version = "0.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
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dependencies = [
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"generic-array 0.14.4",
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"generic-array",
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]
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[[package]]
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@ -381,21 +369,21 @@ dependencies = [
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[[package]]
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name = "bson"
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version = "0.14.1"
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version = "2.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3c177ed0122f24ce5e0f05bf9b29e79f3ac1a359bc504e0e14c3b34896c71c00"
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checksum = "ff58d466782b57e0001c8e97c6a70c01c2359d7e13e257a83654c0b783ecc139"
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dependencies = [
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"byteorder",
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"ahash",
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"base64",
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"chrono",
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"decimal",
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"hex 0.3.2",
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"libc",
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"linked-hash-map",
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"md5 0.6.1",
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"rand 0.7.3",
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"hex",
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"indexmap",
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"lazy_static",
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"rand 0.8.4",
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"serde",
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"serde_bytes",
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"serde_json",
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"time",
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"uuid",
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]
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[[package]]
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@ -800,7 +788,7 @@ version = "0.11.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b1d1a86f49236c215f271d40892d5fc950490551400b02ef360692c29815c714"
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dependencies = [
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"generic-array 0.14.4",
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"generic-array",
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"subtle",
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]
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@ -879,27 +867,6 @@ version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7313c0d620d0cb4dbd9d019e461a4beb501071ff46ec0ab933efb4daa76d73e3"
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[[package]]
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name = "decimal"
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version = "2.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5a8ab77e91baeb15034c3be91e87bff4665c9036216148e4996d9a9f5792114d"
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dependencies = [
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"bitflags",
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"cc",
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"libc",
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]
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[[package]]
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name = "deflate"
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version = "0.7.20"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "707b6a7b384888a70c8d2e8650b3e60170dfc6a67bb4aa67b6dfca57af4bedb4"
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dependencies = [
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"adler32",
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"byteorder",
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]
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[[package]]
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name = "deflate"
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version = "0.8.6"
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@ -940,7 +907,7 @@ version = "0.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
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dependencies = [
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"generic-array 0.14.4",
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"generic-array",
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]
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[[package]]
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@ -1456,24 +1423,6 @@ version = "0.3.55"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
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[[package]]
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name = "generic-array"
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version = "0.12.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ffdf9f34f1447443d37393cc6c2b8313aebddcd96906caf34e54c68d8e57d7bd"
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dependencies = [
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"typenum",
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]
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[[package]]
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name = "generic-array"
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version = "0.13.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f797e67af32588215eaaab8327027ee8e71b9dd0b2b26996aedf20c030fce309"
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dependencies = [
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"typenum",
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]
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[[package]]
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name = "generic-array"
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version = "0.14.4"
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@ -1651,9 +1600,9 @@ dependencies = [
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[[package]]
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name = "hash32"
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version = "0.1.1"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d4041af86e63ac4298ce40e5cca669066e75b6f1aa3390fe2561ffa5e1d9f4cc"
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checksum = "b0c35f58762feb77d74ebe43bdbc3210f09be9fe6742234d573bacc26ed92b67"
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dependencies = [
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"byteorder",
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]
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@ -1685,13 +1634,12 @@ dependencies = [
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[[package]]
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name = "heapless"
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version = "0.6.1"
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version = "0.7.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "634bd4d29cbf24424d0a4bfcbf80c6960129dc24424752a7d1d1390607023422"
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checksum = "9c1ad878e07405df82b695089e63d278244344f80e764074d0bdfe99b89460f3"
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dependencies = [
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"as-slice",
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"generic-array 0.14.4",
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"hash32",
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"spin",
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"stable_deref_trait",
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]
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@ -1704,12 +1652,6 @@ dependencies = [
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"libc",
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]
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[[package]]
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name = "hex"
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version = "0.3.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "805026a5d0141ffc30abb3be3173848ad46a1b1664fe632428479619a3644d77"
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[[package]]
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name = "hex"
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version = "0.4.3"
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@ -1855,20 +1797,6 @@ dependencies = [
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"unicode-normalization",
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]
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[[package]]
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name = "image"
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version = "0.22.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "08ed2ada878397b045454ac7cfb011d73132c59f31a955d230bd1f1c2e68eb4a"
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dependencies = [
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"byteorder",
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"jpeg-decoder",
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"num-iter",
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"num-rational 0.2.4",
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"num-traits",
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"png 0.15.3",
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]
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[[package]]
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name = "image"
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version = "0.23.14"
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@ -1878,10 +1806,11 @@ dependencies = [
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"bytemuck",
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"byteorder",
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"color_quant",
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"jpeg-decoder",
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"num-iter",
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"num-rational 0.3.2",
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"num-traits",
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"png 0.16.8",
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"png",
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"tiff",
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]
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@ -1896,15 +1825,6 @@ dependencies = [
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"serde",
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]
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[[package]]
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name = "inflate"
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version = "0.4.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1cdb29978cc5797bd8dcc8e5bf7de604891df2a8dc576973d71a281e916db2ff"
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dependencies = [
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"adler32",
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]
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[[package]]
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name = "insta"
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version = "1.7.2"
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@ -2237,12 +2157,6 @@ dependencies = [
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"opaque-debug",
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]
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[[package]]
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name = "md5"
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version = "0.6.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "7e6bcd6433cff03a4bfc3d9834d504467db1f1cf6d0ea765d37d330249ed629d"
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[[package]]
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name = "md5"
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version = "0.7.0"
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@ -2342,9 +2256,9 @@ dependencies = [
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[[package]]
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name = "mp4"
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version = "0.8.3"
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version = "0.9.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "51eb18a88129198ca1e8e92f26038ed6814cd0e608fa43215bf57368604bf093"
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checksum = "85660d4d88b9318d95396943adc4a254b3ed8bf1de917e6f093abda1ccf0bec0"
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dependencies = [
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"byteorder",
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"bytes 0.5.6",
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@ -2679,16 +2593,14 @@ dependencies = [
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"sha2",
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"sys-locale",
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"toml",
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"users",
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]
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[[package]]
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name = "nu-engine"
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version = "0.39.0"
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dependencies = [
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"ansi_term 0.12.1",
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"bigdecimal-rs",
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"bytes 0.5.6",
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"bytes 1.1.0",
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"chrono",
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"codespan-reporting",
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"derive-new",
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@ -2911,7 +2823,7 @@ name = "nu_plugin_binaryview"
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version = "0.39.0"
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dependencies = [
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"crossterm",
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"image 0.22.5",
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"image",
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"neso",
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"nu-ansi-term",
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"nu-errors",
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@ -3075,7 +2987,7 @@ dependencies = [
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name = "nu_plugin_to_sqlite"
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version = "0.39.0"
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dependencies = [
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"hex 0.4.3",
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"hex",
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"nu-errors",
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"nu-plugin",
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"nu-protocol",
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@ -3597,18 +3509,6 @@ dependencies = [
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"xml-rs",
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]
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[[package]]
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name = "png"
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version = "0.15.3"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ef859a23054bbfee7811284275ae522f0434a3c8e7f4b74bd4a35ae7e1c4a283"
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dependencies = [
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"bitflags",
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"crc32fast",
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"deflate 0.7.20",
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"inflate",
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]
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[[package]]
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name = "png"
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version = "0.16.8"
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@ -3617,7 +3517,7 @@ checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
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dependencies = [
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"bitflags",
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"crc32fast",
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"deflate 0.8.6",
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"deflate",
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"miniz_oxide 0.3.7",
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]
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@ -4351,7 +4251,7 @@ dependencies = [
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"hmac",
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"hmac-sha1",
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"log",
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"md5 0.7.0",
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"md5",
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"mime_guess",
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"quick-xml 0.22.0",
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"regex",
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@ -4703,6 +4603,15 @@ dependencies = [
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"winapi 0.3.9",
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]
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[[package]]
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name = "spin"
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version = "0.9.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "511254be0c5bcf062b019a6c89c01a664aa359ded62f78aa72c6fc137c0590e5"
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dependencies = [
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"lock_api",
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]
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[[package]]
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name = "stable_deref_trait"
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version = "1.2.0"
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283
crates/nu-command/src/commands/strings/detect/columns.rs
Normal file
283
crates/nu-command/src/commands/strings/detect/columns.rs
Normal file
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@ -0,0 +1,283 @@
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use std::{iter::Peekable, str::CharIndices};
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use crate::prelude::*;
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use nu_engine::WholeStreamCommand;
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use nu_errors::ShellError;
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use nu_protocol::{Signature, SyntaxShape, TaggedDictBuilder, UntaggedValue};
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use nu_source::Spanned;
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type Input<'t> = Peekable<CharIndices<'t>>;
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pub struct DetectColumns;
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impl WholeStreamCommand for DetectColumns {
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fn name(&self) -> &str {
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"detect columns"
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}
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fn signature(&self) -> Signature {
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Signature::build("detect columns")
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.named(
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"skip",
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SyntaxShape::Int,
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"number of rows to skip before detecting",
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Some('s'),
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)
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.switch("no_headers", "don't detect headers", Some('n'))
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}
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fn usage(&self) -> &str {
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"splits contents across multiple columns via the separator."
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}
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fn run(&self, args: CommandArgs) -> Result<OutputStream, ShellError> {
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detect_columns(args)
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}
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}
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fn detect_columns(args: CommandArgs) -> Result<OutputStream, ShellError> {
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let name_tag = args.name_tag();
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let num_rows_to_skip: Option<usize> = args.get_flag("skip")?;
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let noheader = args.has_flag("no_headers");
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let input = args.input.collect_string(name_tag.clone())?;
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let input: Vec<_> = input
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.lines()
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.skip(num_rows_to_skip.unwrap_or_default())
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.map(|x| x.to_string())
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.collect();
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let mut input = input.into_iter();
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let headers = input.next();
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if let Some(orig_headers) = headers {
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let headers = find_columns(&orig_headers);
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Ok((if noheader {
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vec![orig_headers].into_iter().chain(input)
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} else {
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vec![].into_iter().chain(input)
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})
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.map(move |x| {
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let row = find_columns(&x);
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let mut dict = TaggedDictBuilder::new(name_tag.clone());
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if headers.len() == row.len() && !noheader {
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for (header, val) in headers.iter().zip(row.iter()) {
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dict.insert_untagged(&header.item, UntaggedValue::string(&val.item));
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}
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} else {
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let mut pre_output = vec![];
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// column counts don't line up, so see if we can figure out why
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for cell in row {
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for header in &headers {
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if cell.span.start() <= header.span.end()
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&& cell.span.end() > header.span.start()
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{
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pre_output
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.push((header.item.to_string(), UntaggedValue::string(&cell.item)));
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}
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}
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}
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for header in &headers {
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let mut found = false;
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for pre_o in &pre_output {
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if pre_o.0 == header.item {
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found = true;
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break;
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}
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}
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if !found {
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pre_output.push((header.item.to_string(), UntaggedValue::nothing()));
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||||
}
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}
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if noheader {
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for header in headers.iter().enumerate() {
|
||||
for pre_o in &pre_output {
|
||||
if pre_o.0 == header.1.item {
|
||||
dict.insert_untagged(format!("Column{}", header.0), pre_o.1.clone())
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
for header in &headers {
|
||||
for pre_o in &pre_output {
|
||||
if pre_o.0 == header.item {
|
||||
dict.insert_untagged(&header.item, pre_o.1.clone())
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
dict.into_value()
|
||||
})
|
||||
.into_output_stream())
|
||||
} else {
|
||||
Ok(OutputStream::empty())
|
||||
}
|
||||
}
|
||||
|
||||
pub fn find_columns(input: &str) -> Vec<Spanned<String>> {
|
||||
let mut chars = input.char_indices().peekable();
|
||||
let mut output = vec![];
|
||||
|
||||
while let Some((_, c)) = chars.peek() {
|
||||
if c.is_whitespace() {
|
||||
// If the next character is non-newline whitespace, skip it.
|
||||
|
||||
let _ = chars.next();
|
||||
} else {
|
||||
// Otherwise, try to consume an unclassified token.
|
||||
|
||||
let result = baseline(&mut chars);
|
||||
|
||||
output.push(result);
|
||||
}
|
||||
}
|
||||
|
||||
output
|
||||
}
|
||||
|
||||
#[derive(Clone, Copy)]
|
||||
enum BlockKind {
|
||||
Paren,
|
||||
CurlyBracket,
|
||||
SquareBracket,
|
||||
}
|
||||
|
||||
fn baseline(src: &mut Input) -> Spanned<String> {
|
||||
let mut token_contents = String::new();
|
||||
|
||||
let start_offset = if let Some((pos, _)) = src.peek() {
|
||||
*pos
|
||||
} else {
|
||||
0
|
||||
};
|
||||
|
||||
// This variable tracks the starting character of a string literal, so that
|
||||
// we remain inside the string literal lexer mode until we encounter the
|
||||
// closing quote.
|
||||
let mut quote_start: Option<char> = None;
|
||||
|
||||
// This Vec tracks paired delimiters
|
||||
let mut block_level: Vec<BlockKind> = vec![];
|
||||
|
||||
// A baseline token is terminated if it's not nested inside of a paired
|
||||
// delimiter and the next character is one of: `|`, `;`, `#` or any
|
||||
// whitespace.
|
||||
fn is_termination(block_level: &[BlockKind], c: char) -> bool {
|
||||
block_level.is_empty() && (c.is_whitespace())
|
||||
}
|
||||
|
||||
// The process of slurping up a baseline token repeats:
|
||||
//
|
||||
// - String literal, which begins with `'`, `"` or `\``, and continues until
|
||||
// the same character is encountered again.
|
||||
// - Delimiter pair, which begins with `[`, `(`, or `{`, and continues until
|
||||
// the matching closing delimiter is found, skipping comments and string
|
||||
// literals.
|
||||
// - When not nested inside of a delimiter pair, when a terminating
|
||||
// character (whitespace, `|`, `;` or `#`) is encountered, the baseline
|
||||
// token is done.
|
||||
// - Otherwise, accumulate the character into the current baseline token.
|
||||
while let Some((_, c)) = src.peek() {
|
||||
let c = *c;
|
||||
|
||||
if quote_start.is_some() {
|
||||
// If we encountered the closing quote character for the current
|
||||
// string, we're done with the current string.
|
||||
if Some(c) == quote_start {
|
||||
quote_start = None;
|
||||
}
|
||||
} else if c == '\n' {
|
||||
if is_termination(&block_level, c) {
|
||||
break;
|
||||
}
|
||||
} else if c == '\'' || c == '"' || c == '`' {
|
||||
// We encountered the opening quote of a string literal.
|
||||
quote_start = Some(c);
|
||||
} else if c == '[' {
|
||||
// We encountered an opening `[` delimiter.
|
||||
block_level.push(BlockKind::SquareBracket);
|
||||
} else if c == ']' {
|
||||
// We encountered a closing `]` delimiter. Pop off the opening `[`
|
||||
// delimiter.
|
||||
if let Some(BlockKind::SquareBracket) = block_level.last() {
|
||||
let _ = block_level.pop();
|
||||
}
|
||||
} else if c == '{' {
|
||||
// We encountered an opening `{` delimiter.
|
||||
block_level.push(BlockKind::CurlyBracket);
|
||||
} else if c == '}' {
|
||||
// We encountered a closing `}` delimiter. Pop off the opening `{`.
|
||||
if let Some(BlockKind::CurlyBracket) = block_level.last() {
|
||||
let _ = block_level.pop();
|
||||
}
|
||||
} else if c == '(' {
|
||||
// We enceountered an opening `(` delimiter.
|
||||
block_level.push(BlockKind::Paren);
|
||||
} else if c == ')' {
|
||||
// We encountered a closing `)` delimiter. Pop off the opening `(`.
|
||||
if let Some(BlockKind::Paren) = block_level.last() {
|
||||
let _ = block_level.pop();
|
||||
}
|
||||
} else if is_termination(&block_level, c) {
|
||||
break;
|
||||
}
|
||||
|
||||
// Otherwise, accumulate the character into the current token.
|
||||
token_contents.push(c);
|
||||
|
||||
// Consume the character.
|
||||
let _ = src.next();
|
||||
}
|
||||
|
||||
let span = Span::new(start_offset, start_offset + token_contents.len());
|
||||
|
||||
// If there is still unclosed opening delimiters, close them and add
|
||||
// synthetic closing characters to the accumulated token.
|
||||
if block_level.last().is_some() {
|
||||
// let delim: char = (*block).closing();
|
||||
// let cause = ParseError::unexpected_eof(delim.to_string(), span);
|
||||
|
||||
// while let Some(bk) = block_level.pop() {
|
||||
// token_contents.push(bk.closing());
|
||||
// }
|
||||
|
||||
return token_contents.spanned(span);
|
||||
}
|
||||
|
||||
if quote_start.is_some() {
|
||||
// The non-lite parse trims quotes on both sides, so we add the expected quote so that
|
||||
// anyone wanting to consume this partial parse (e.g., completions) will be able to get
|
||||
// correct information from the non-lite parse.
|
||||
// token_contents.push(delimiter);
|
||||
|
||||
// return (
|
||||
// token_contents.spanned(span),
|
||||
// Some(ParseError::unexpected_eof(delimiter.to_string(), span)),
|
||||
// );
|
||||
return token_contents.spanned(span);
|
||||
}
|
||||
|
||||
token_contents.spanned(span)
|
||||
}
|
||||
|
||||
#[cfg(test)]
|
||||
mod tests {
|
||||
use super::DetectColumns;
|
||||
use super::ShellError;
|
||||
|
||||
#[test]
|
||||
fn examples_work_as_expected() -> Result<(), ShellError> {
|
||||
use crate::examples::test as test_examples;
|
||||
|
||||
test_examples(DetectColumns {})
|
||||
}
|
||||
}
|
||||
3
crates/nu-command/src/commands/strings/detect/mod.rs
Normal file
3
crates/nu-command/src/commands/strings/detect/mod.rs
Normal file
|
|
@ -0,0 +1,3 @@
|
|||
pub mod columns;
|
||||
|
||||
pub use columns::DetectColumns;
|
||||
|
|
@ -1,5 +1,6 @@
|
|||
mod build_string;
|
||||
mod char_;
|
||||
mod detect;
|
||||
mod format;
|
||||
mod lines;
|
||||
mod parse;
|
||||
|
|
@ -10,6 +11,7 @@ mod str_;
|
|||
|
||||
pub use build_string::BuildString;
|
||||
pub use char_::Char;
|
||||
pub use detect::DetectColumns;
|
||||
pub use format::*;
|
||||
pub use lines::Lines;
|
||||
pub use parse::*;
|
||||
|
|
|
|||
|
|
@ -127,6 +127,7 @@ pub fn create_default_context(interactive: bool) -> Result<EvaluationContext, Bo
|
|||
whole_stream_command(AnsiStrip),
|
||||
whole_stream_command(AnsiGradient),
|
||||
whole_stream_command(Char),
|
||||
whole_stream_command(DetectColumns),
|
||||
// Column manipulation
|
||||
whole_stream_command(DropColumn),
|
||||
whole_stream_command(MoveColumn),
|
||||
|
|
|
|||
Loading…
Reference in a new issue