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tree-sitter-cli: build: add support for git submodules (#422)

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The .git file can contain a reference to the actual git directory as is commonly the case for a submodule[1]. When this is the case, read the .git file to discover the actual git directory.

 * cli/build.rs: Read the .git file to discover the git directory

[1] https://git-scm.com/docs/gitrepository-layout
This commit is contained in:
Matthew Krupcale 2019-08-12 17:11:59 -04:00 • committed by Max Brunsfeld
parent 13c0aa7dbb
commit 276d3cb5ad
1 changed files with 10 additions and 2 deletions
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12
cli/build.rs
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@ -25,7 +25,15 @@ fn read_git_sha() -> Option<String> {
}
}
let git_head_path = git_path.join("HEAD");
let git_dir_path;
if git_path.is_dir() {
git_dir_path = git_path;
} else if let Ok(git_path_content) = fs::read_to_string(&git_path) {
git_dir_path = repo_path.join(git_path_content.get("gitdir: ".len()..).unwrap().trim_end());
} else {
return None;
}
let git_head_path = git_dir_path.join("HEAD");
if let Some(path) = git_head_path.to_str() {
println!("cargo:rerun-if-changed={}", path);
}
@ -37,7 +45,7 @@ fn read_git_sha() -> Option<String> {
// If we're on a branch, read the SHA from the ref file.
if head_content.starts_with("ref: ") {
head_content.replace_range(0.."ref: ".len(), "");
let ref_filename = git_path.join(&head_content);
let ref_filename = git_dir_path.join(&head_content);
if let Some(path) = ref_filename.to_str() {
println!("cargo:rerun-if-changed={}", path);
}