mirror of
https://github.com/uutils/coreutils
synced 2024-11-16 17:58:06 +00:00
b90d253584
For coreutils, there are two build artifacts:
1. multicall executable (each utility is a separate static library)
2. individual utilities (still separate library with main wrapper)
To avoid namespace collision, each utility crate is defined as
"uu_{CMD}". The end user only sees the original utility name. This
simplifies build.rs.
Also, the thin wrapper for the main() function is no longer contained in
the crate. It has been separated into a dedicated file. This was
necessary to work around Cargo's need for the crate name attribute to
match the name in the respective Cargo.toml.
54 lines
1.9 KiB
Rust
54 lines
1.9 KiB
Rust
use std::env;
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use std::fs::File;
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use std::io::Write;
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use std::path::Path;
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pub fn main() {
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let feature_prefix = "CARGO_FEATURE_";
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let out_dir = env::var("OUT_DIR").unwrap();
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let mut crates = Vec::new();
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for (key, val) in env::vars() {
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if val == "1" && key.starts_with(feature_prefix) {
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let krate = key[feature_prefix.len()..].to_lowercase();
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match krate.as_ref() {
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"default" | "unix" | "generic" => continue,
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_ => {},
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}
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crates.push(krate.to_string());
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}
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}
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crates.sort();
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let mut cf = File::create(Path::new(&out_dir).join("uutils_crates.rs")).unwrap();
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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 = HashMap<&'static str, fn(Vec<String>) -> i32>;
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fn util_map() -> UtilityMap {
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let mut map: UtilityMap = HashMap::new();\n".as_bytes()).unwrap();
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for krate in crates {
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cf.write_all(format!("extern crate uu_{krate};\n", krate=krate).as_bytes()).unwrap();
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match krate.as_ref() {
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"hashsum" => {
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mf.write_all("map.insert(\"hashsum\", uu_hashsum::uumain);
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map.insert(\"md5sum\", uu_hashsum::uumain);
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map.insert(\"sha1sum\", uu_hashsum::uumain);
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map.insert(\"sha224sum\", uu_hashsum::uumain);
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map.insert(\"sha256sum\", uu_hashsum::uumain);
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map.insert(\"sha384sum\", uu_hashsum::uumain);
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map.insert(\"sha512sum\", uu_hashsum::uumain);\n".as_bytes()).unwrap();
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},
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_ =>
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mf.write_all(format!("map.insert(\"{krate}\", uu_{krate}::uumain);\n", krate=krate).as_bytes()).unwrap(),
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}
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}
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mf.write_all("map\n}\n".as_bytes()).unwrap();
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cf.flush().unwrap();
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mf.flush().unwrap();
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}
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