mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-30 17:47:56 +00:00
Shawn Tabrizi
45 lines
1.5 KiB
Rust
45 lines
1.5 KiB
Rust
// Copyright 2019-2020 Parity Technologies (UK) Ltd.
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// This file is part of Substrate.
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// Substrate is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Substrate is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Substrate. If not, see <http://www.gnu.org/licenses/>.
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//! Crate with utility functions for `build.rs` scripts.
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use std::{env, path::PathBuf};
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/// Make sure the calling `build.rs` script is rerun when `.git/HEAD` changed.
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///
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/// The file is searched from the `CARGO_MANIFEST_DIR` upwards. If the file can not be found,
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/// a warning is generated.
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pub fn rerun_if_git_head_changed() {
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let mut manifest_dir = PathBuf::from(
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env::var("CARGO_MANIFEST_DIR").expect("`CARGO_MANIFEST_DIR` is always set by cargo.")
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);
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let manifest_dir_copy = manifest_dir.clone();
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while manifest_dir.parent().is_some() {
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if manifest_dir.join(".git/HEAD").exists() {
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println!("cargo:rerun-if-changed={}", manifest_dir.join(".git/HEAD").display());
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return
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}
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manifest_dir.pop();
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}
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println!(
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"cargo:warning=Could not find `.git/HEAD` searching from `{}` upwards!",
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manifest_dir_copy.display(),
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);
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}
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