mirror of
https://github.com/martinvonz/jj.git
synced 2024-12-26 05:57:10 +00:00
5e22e67584
Since .git/HEAD is less frequently updated, this should avoid unneeded recompilation on test-only changes. This only applies to colocated repo. For non-colocated repo, maybe we can watch src/ and ../lib/src files? This also adds $NIX_JJ_GIT_HASH to reflect hash changes (and to not rerun if no .git nor .jj directory exists.)
84 lines
2.6 KiB
Rust
84 lines
2.6 KiB
Rust
// Copyright 2023 The Jujutsu Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
use std::path::Path;
|
|
use std::process::Command;
|
|
use std::str;
|
|
|
|
use cargo_metadata::MetadataCommand;
|
|
|
|
const GIT_HEAD_PATH: &str = "../.git/HEAD";
|
|
const JJ_OP_HEADS_PATH: &str = "../.jj/repo/op_heads/heads";
|
|
|
|
fn main() -> std::io::Result<()> {
|
|
let path = std::env::var("CARGO_MANIFEST_DIR").unwrap();
|
|
let meta = MetadataCommand::new()
|
|
.manifest_path("./Cargo.toml")
|
|
.current_dir(&path)
|
|
.exec()
|
|
.unwrap();
|
|
let root = meta.root_package().unwrap();
|
|
let version = &root.version;
|
|
|
|
if Path::new(GIT_HEAD_PATH).exists() {
|
|
// In colocated repo, .git/HEAD should reflect the working-copy parent.
|
|
println!("cargo:rerun-if-changed={GIT_HEAD_PATH}");
|
|
} else if Path::new(JJ_OP_HEADS_PATH).exists() {
|
|
// op_heads changes when working-copy files are mutated, which is way more
|
|
// frequent than .git/HEAD.
|
|
println!("cargo:rerun-if-changed={JJ_OP_HEADS_PATH}");
|
|
}
|
|
println!("cargo:rerun-if-env-changed=NIX_JJ_GIT_HASH");
|
|
|
|
if let Some(git_hash) = get_git_hash() {
|
|
println!("cargo:rustc-env=JJ_VERSION={}-{}", version, git_hash);
|
|
} else {
|
|
println!("cargo:rustc-env=JJ_VERSION={}", version);
|
|
}
|
|
|
|
Ok(())
|
|
}
|
|
|
|
fn get_git_hash() -> Option<String> {
|
|
if let Some(nix_hash) = std::env::var("NIX_JJ_GIT_HASH")
|
|
.ok()
|
|
.filter(|s| !s.is_empty())
|
|
{
|
|
return Some(nix_hash);
|
|
}
|
|
if let Ok(output) = Command::new("jj")
|
|
.args([
|
|
"--ignore-working-copy",
|
|
"--color=never",
|
|
"log",
|
|
"--no-graph",
|
|
"-r=@-",
|
|
"-T=commit_id",
|
|
])
|
|
.output()
|
|
{
|
|
if output.status.success() {
|
|
return Some(String::from_utf8(output.stdout).unwrap());
|
|
}
|
|
}
|
|
|
|
if let Ok(output) = Command::new("git").args(["rev-parse", "HEAD"]).output() {
|
|
if output.status.success() {
|
|
let line = str::from_utf8(&output.stdout).unwrap();
|
|
return Some(line.trim_end().to_owned());
|
|
}
|
|
}
|
|
|
|
None
|
|
}
|