mirror of
https://github.com/Llewellynvdm/exa.git
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62 lines
1.9 KiB
Rust
62 lines
1.9 KiB
Rust
/// The version string isn’t the simplest: we want to show the version,
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/// current Git hash, and compilation date when building *debug* versions, but
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/// just the version for *release* versions so the builds are reproducible.
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///
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/// This script generates the string from the environment variables that Cargo
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/// adds (http://doc.crates.io/environment-variables.html) and runs `git` to
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/// get the SHA1 hash. It then writes the string into a file, which exa then
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/// includes at build-time.
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///
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/// - https://stackoverflow.com/q/43753491/3484614
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/// - https://crates.io/crates/vergen
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extern crate datetime;
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use std::io::Result as IOResult;
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use std::env;
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fn git_hash() -> String {
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use std::process::Command;
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String::from_utf8_lossy(
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&Command::new("git")
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.args(&["rev-parse", "--short", "HEAD"])
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.output().unwrap()
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.stdout).trim().to_string()
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}
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fn main() {
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write_statics().unwrap();
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}
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fn is_development_version() -> bool {
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// Both weekly releases and actual releases are --release releases,
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// but actual releases will have a proper version number
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cargo_version().ends_with("-pre") || env::var("PROFILE").unwrap() == "debug"
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}
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fn cargo_version() -> String {
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env::var("CARGO_PKG_VERSION").unwrap()
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}
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fn build_date() -> String {
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use datetime::{LocalDateTime, ISO};
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let now = LocalDateTime::now();
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format!("{}", now.date().iso())
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}
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fn write_statics() -> IOResult<()> {
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use std::fs::File;
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use std::io::Write;
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use std::path::PathBuf;
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let ver = match is_development_version() {
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true => format!("exa v{} ({} built on {})", cargo_version(), git_hash(), build_date()),
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false => format!("exa v{}", cargo_version()),
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};
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let out = PathBuf::from(env::var("OUT_DIR").unwrap());
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let mut f = File::create(&out.join("version_string.txt"))?;
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write!(f, "{:?}", ver)
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}
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