coreutils/build.rs

102 lines
4 KiB
Rust
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// spell-checker:ignore (vars) krate
use std::env;
use std::fs::File;
use std::io::Write;
use std::path::Path;
pub fn main() {
if let Ok(profile) = env::var("PROFILE") {
println!("cargo:rustc-cfg=build={:?}", profile);
}
const ENV_FEATURE_PREFIX: &str = "CARGO_FEATURE_";
const FEATURE_PREFIX: &str = "feat_";
const OVERRIDE_PREFIX: &str = "uu_";
let out_dir = env::var("OUT_DIR").unwrap();
let mut crates = Vec::new();
for (key, val) in env::vars() {
if val == "1" && key.starts_with(ENV_FEATURE_PREFIX) {
let krate = key[ENV_FEATURE_PREFIX.len()..].to_lowercase();
match krate.as_ref() {
"default" | "macos" | "unix" | "windows" | "selinux" | "zip" => continue, // common/standard feature names
"nightly" | "test_unimplemented" => continue, // crate-local custom features
"uudoc" => continue, // is not a utility
"test" => continue, // over-ridden with 'uu_test' to avoid collision with rust core crate 'test'
s if s.starts_with(FEATURE_PREFIX) => continue, // crate feature sets
_ => {} // util feature name
}
crates.push(krate);
}
}
crates.sort();
let mut mf = File::create(Path::new(&out_dir).join("uutils_map.rs")).unwrap();
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mf.write_all(
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"type UtilityMap<T> = phf::Map<&'static str, (fn(T) -> i32, fn() -> Command)>;\n\
\n\
fn util_map<T: uucore::Args>() -> UtilityMap<T> {\n"
.as_bytes(),
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)
.unwrap();
let mut phf_map = phf_codegen::Map::<&str>::new();
for krate in &crates {
let map_value = format!("({krate}::uumain, {krate}::uu_app)", krate = krate);
match krate.as_ref() {
// 'test' is named uu_test to avoid collision with rust core crate 'test'.
// It can also be invoked by name '[' for the '[ expr ] syntax'.
"uu_test" => {
phf_map.entry("test", &map_value);
phf_map.entry("[", &map_value);
}
k if k.starts_with(OVERRIDE_PREFIX) => {
phf_map.entry(&k[OVERRIDE_PREFIX.len()..], &map_value);
}
"false" | "true" => {
phf_map.entry(
krate,
&format!("(r#{krate}::uumain, r#{krate}::uu_app)", krate = krate),
);
}
"hashsum" => {
phf_map.entry(
krate,
&format!("({krate}::uumain, {krate}::uu_app_custom)", krate = krate),
);
let map_value = format!("({krate}::uumain, {krate}::uu_app_common)", krate = krate);
let map_value_bits =
format!("({krate}::uumain, {krate}::uu_app_bits)", krate = krate);
let map_value_b3sum =
format!("({krate}::uumain, {krate}::uu_app_b3sum)", krate = krate);
phf_map.entry("md5sum", &map_value);
phf_map.entry("sha1sum", &map_value);
phf_map.entry("sha224sum", &map_value);
phf_map.entry("sha256sum", &map_value);
phf_map.entry("sha384sum", &map_value);
phf_map.entry("sha512sum", &map_value);
phf_map.entry("sha3sum", &map_value_bits);
phf_map.entry("sha3-224sum", &map_value);
phf_map.entry("sha3-256sum", &map_value);
phf_map.entry("sha3-384sum", &map_value);
phf_map.entry("sha3-512sum", &map_value);
phf_map.entry("shake128sum", &map_value_bits);
phf_map.entry("shake256sum", &map_value_bits);
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phf_map.entry("b2sum", &map_value);
phf_map.entry("b3sum", &map_value_b3sum);
}
_ => {
phf_map.entry(krate, &map_value);
}
}
}
write!(mf, "{}", phf_map.build()).unwrap();
mf.write_all(b"\n}\n").unwrap();
mf.flush().unwrap();
}