Reimplement git version generation ourselves

This allows us to remove two dependency crates

Cargo.lock

@@ -102,7 +102,6 @@ dependencies = [
  "cc",
  "errno",
  "fast-float",
- "git-version",
  "hexponent",
  "lazy_static",
  "libc",
@@ -137,26 +136,6 @@ dependencies = [
  "wasi",
 ]
 
-[[package]]
-name = "git-version"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ad568aa3db0fcbc81f2f116137f263d7304f512a1209b35b85150d3ef88ad19"
-dependencies = [
- "git-version-macro",
-]
-
-[[package]]
-name = "git-version-macro"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53010ccb100b96a67bc32c0175f0ed1426b31b655d562898e57325f81c023ac0"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.50",
-]
-
 [[package]]
 name = "hashbrown"
 version = "0.13.2"
@@ -203,9 +182,9 @@ dependencies = [
 
 [[package]]
 name = "log"
-version = "0.4.20"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "lru"
@@ -496,9 +475,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.50"
+version = "2.0.52"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "74f1bdc9872430ce9b75da68329d1c1746faf50ffac5f19e02b71e37ff881ffb"
+checksum = "b699d15b36d1f02c3e7c69f8ffef53de37aefae075d8488d4ba1a7788d574a07"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -589,5 +568,5 @@ checksum = "9ce1b18ccd8e73a9321186f97e46f9f04b778851177567b1975109d26a08d2a6"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.50",
+ "syn 2.0.52",
 ]

Cargo.toml

@@ -34,7 +34,6 @@ num-traits = "0.2.15"
 once_cell = "1.17.0"
 rand = { version = "0.8.5", features = ["small_rng"] }
 widestring = "1.0.2"
-git-version = "0.3"
 terminfo = { git = "https://github.com/meh/rust-terminfo", rev = "870327dd79beaecf50db09a15931d5ee1de2a24d" }
 
 [dev-dependencies]

build.rs

@@ -24,6 +24,8 @@ fn main() {
             .unwrap(),
     );
 
+    rsconf::set_env_value("FISH_BUILD_VERSION", &get_version(build_dir));
+
     rsconf::rebuild_if_path_changed("src/libc.c");
     cc::Build::new()
         .file("src/libc.c")
@@ -193,3 +195,27 @@ fn setup_paths() {
     rsconf::set_env_value("DOCDIR", docdir.to_str().unwrap());
     rsconf::rebuild_if_env_changed("DOCDIR");
 }
+
+fn get_version(build_dir: &str) -> String {
+    use std::fs::read_to_string;
+    use std::process::Command;
+
+    if let Ok(var) = std::env::var("FISH_BUILD_VERSION") {
+        return var;
+    }
+
+    let path = PathBuf::from(build_dir).join("version");
+    if let Ok(strver) = read_to_string(path) {
+        return strver.to_string();
+    }
+
+    let args = &["describe", "--always", "--dirty=-dirty"];
+    if let Ok(output) = Command::new("git").args(args).output() {
+        let rev = String::from_utf8_lossy(&output.stdout).trim().to_string();
+        if !rev.is_empty() {
+            return rev;
+        }
+    }
+
+    "unknown".to_string()
+}

src/lib.rs

@@ -22,10 +22,7 @@
 #![allow(clippy::too_many_arguments)]
 #![allow(clippy::uninlined_format_args)]
 
-pub const BUILD_VERSION: &str = match option_env!("FISH_BUILD_VERSION") {
+pub const BUILD_VERSION: &str = env!("FISH_BUILD_VERSION");
-    Some(v) => v,
-    None => git_version::git_version!(args = ["--always", "--dirty=-dirty"], fallback = "unknown"),
-};
 
 #[macro_use]
 pub mod common;