Move the git revision logic to a crate (#224)

Cargo.toml

@@ -13,9 +13,7 @@ autobins = false
 build = "build.rs"
 
 [build-dependencies]
-serde = "1.0.82"
-serde_derive = "1.0.82"
-serde_json = "1.0.82"
+crate-git-revision = "0.0.2"
 
 [[bin]]
 name = "soroban"

build.rs

@@ -1,43 +1,3 @@
-use serde_derive::{Deserialize, Serialize};
-use std::{fs::read_to_string, process::Command, str};
-
 fn main() {
-    println!("cargo:rerun-if-changed=.");
-
-    let mut git_sha: Option<String> = None;
-
-    if let Ok(vcs_info) = read_to_string(".cargo_vcs_info.json") {
-        let vcs_info: Result<CargoVcsInfo, _> = serde_json::from_str(&vcs_info);
-        if let Ok(vcs_info) = vcs_info {
-            git_sha = Some(vcs_info.git.sha1);
-        }
-    }
-
-    if git_sha.is_none() {
-        if let Ok(git_describe) = Command::new("git")
-            .arg("describe")
-            .arg("--always")
-            .arg("--exclude='*'")
-            .arg("--long")
-            .arg("--dirty")
-            .output()
-            .map(|o| o.stdout)
-        {
-            git_sha = str::from_utf8(&git_describe).ok().map(str::to_string);
-        }
-    }
-
-    if let Some(git_sha) = git_sha {
-        println!("cargo:rustc-env=GIT_SHA={}", git_sha);
-    }
-}
-
-#[derive(Serialize, Deserialize, Default)]
-struct CargoVcsInfo {
-    git: CargoVcsInfoGit,
-}
-
-#[derive(Serialize, Deserialize, Default)]
-struct CargoVcsInfoGit {
-    sha1: String,
+    crate_git_revision::init();
 }

src/version.rs

@@ -2,7 +2,7 @@ use clap::Parser;
 use soroban_env_host::meta;
 use std::fmt::Debug;
 
-const GIT_SHA: Option<&str> = option_env!("GIT_SHA");
+const GIT_REVISION: &str = env!("GIT_REVISION");
 
 #[derive(Parser, Debug)]
 pub struct Cmd;
@@ -13,7 +13,7 @@ impl Cmd {
         println!(
             "soroban-cli {} ({})",
             env!("CARGO_PKG_VERSION"),
-            GIT_SHA.unwrap_or_default(),
+            GIT_REVISION,
         );
         println!("soroban-env-interface-version: {}", meta::INTERFACE_VERSION);
     }