forked from extern/nushell
83 lines
2.6 KiB
Rust
83 lines
2.6 KiB
Rust
use lazy_static::lazy_static;
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use serde::Deserialize;
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use std::collections::BTreeMap;
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use std::collections::HashMap;
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use std::collections::HashSet;
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use std::env;
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use std::path::{Path, PathBuf};
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use std::sync::Mutex;
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lazy_static! {
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static ref WORKSPACES: Mutex<BTreeMap<String, &'static Path>> = Mutex::new(BTreeMap::new());
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}
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// got from https://github.com/mitsuhiko/insta/blob/b113499249584cb650150d2d01ed96ee66db6b30/src/runtime.rs#L67-L88
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fn get_cargo_workspace(manifest_dir: &str) -> Option<&Path> {
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let mut workspaces = WORKSPACES.lock().unwrap();
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if let Some(rv) = workspaces.get(manifest_dir) {
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Some(rv)
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} else {
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#[derive(Deserialize)]
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struct Manifest {
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workspace_root: String,
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}
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let output = std::process::Command::new(env!("CARGO"))
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.arg("metadata")
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.arg("--format-version=1")
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.current_dir(manifest_dir)
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.output()
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.unwrap();
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let manifest: Manifest = serde_json::from_slice(&output.stdout).unwrap();
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let path = Box::leak(Box::new(PathBuf::from(manifest.workspace_root)));
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workspaces.insert(manifest_dir.to_string(), path.as_path());
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workspaces.get(manifest_dir).map(|w| *w)
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}
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}
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#[derive(Deserialize)]
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struct Feature {
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#[allow(unused)]
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description: String,
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enabled: bool,
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}
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pub fn build() -> Result<(), Box<dyn std::error::Error>> {
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let input = env::var("CARGO_MANIFEST_DIR").unwrap();
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let all_on = env::var("NUSHELL_ENABLE_ALL_FLAGS").is_ok();
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let flags: HashSet<String> = env::var("NUSHELL_ENABLE_FLAGS")
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.map(|s| s.split(",").map(|s| s.to_string()).collect())
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.unwrap_or_else(|_| HashSet::new());
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if all_on && !flags.is_empty() {
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println!(
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"cargo:warning={}",
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"Both NUSHELL_ENABLE_ALL_FLAGS and NUSHELL_ENABLE_FLAGS were set. You don't need both."
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);
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}
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let workspace = match get_cargo_workspace(&input) {
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// If the crate is being downloaded from crates.io, it won't have a workspace root, and that's ok
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None => return Ok(()),
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Some(workspace) => workspace,
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};
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let path = Path::new(&workspace).join("features.toml");
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// If the crate is being downloaded from crates.io, it won't have a features.toml, and that's ok
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if !path.exists() {
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return Ok(());
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}
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let toml: HashMap<String, Feature> = toml::from_str(&std::fs::read_to_string(path)?)?;
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for (key, value) in toml.iter() {
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if value.enabled == true || all_on || flags.contains(key) {
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println!("cargo:rustc-cfg={}", key);
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}
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}
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Ok(())
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}
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