Converted repo from an umbrella to just vita-newlib-shims (#4)

- Now features are enabled by `build.rs` depending on which symbols are
exported in Vita SDK `libc.a`

.github/workflows/ci.yml

@@ -0,0 +1,68 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+**"
+
+env:
+  RUSTFLAGS: -D warnings
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/vita-rust/vitasdk-rs
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: "`cargo check`"
+        run: cargo check --all-targets --all-features
+      - name: "`cargo clippy`"
+        run: cargo clippy --all-targets --all-features
+      - name: Run cargo doc
+        run: DOCS_RS=1 RUSTDOCFLAGS="--cfg docsrs" cargo +nightly doc --all-features --target armv7-sony-vita-newlibeabihf -Z build-std
+      - name: Upload docs
+        uses: actions/upload-artifact@v3
+        with:
+          name: docs
+          path: target/armv7-sony-vita-newlibeabihf/doc
+          if-no-files-found: error
+
+  release:
+    if: startsWith(github.ref, 'refs/tags/v')
+    name: GitHub Release
+    runs-on: ubuntu-latest
+    needs: check
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Build Changelog
+        id: github_release
+        uses: mikepenz/release-changelog-builder-action@v3
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: GH Release
+        uses: softprops/action-gh-release@v1
+        with:
+          body: ${{steps.github_release.outputs.changelog}}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  publish:
+    if: startsWith(github.ref, 'refs/tags/v')
+    name: Publish to crates.io
+    runs-on: ubuntu-latest
+    needs: check
+    container:
+      image: ghcr.io/vita-rust/vitasdk-rs
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: publish
+        run: cargo publish --token ${CRATES_TOKEN}
+        env:
+          CRATES_TOKEN: ${{ secrets.CRATES_TOKEN }}

.vscode/settings.json

@@ -1,36 +1,3 @@
 {
-    "cSpell.words": [
-        "alloc",
-        "bufsz",
-        "clippy",
-        "Condvar",
-        "cvar",
-        "dealloc",
-        "direntry",
-        "direnv",
-        "envrc",
-        "fchown",
-        "getppid",
-        "lchown",
-        "libc",
-        "linkat",
-        "malloc",
-        "newdirfd",
-        "newlib",
-        "newpath",
-        "olddirfd",
-        "oldpath",
-        "POSIX",
-        "pthread",
-        "readlink",
-        "realloc",
-        "rustlang",
-        "rwlock",
-        "socketpair",
-        "ssize",
-        "structs",
-        "vitacompanion",
-        "VITASDK"
-    ],
     "rust-analyzer.cargo.target": "armv7-sony-vita-newlibeabihf"
-}
+}

Cargo.toml

@@ -1,3 +1,26 @@
-[workspace]
-members = ["crates/*"]
-resolver = "2"
+[package]
+name = "vita-newlib-shims"
+version = "0.2.1"
+edition = "2021"
+
+license = "MIT OR Apache-2.0"
+description = "Shims for libc functions not provided by Vita SDK newlib"
+homepage = "https://github.com/vita-rust/std/tree/main/crates/vita-newlib-shims"
+repository = "https://github.com/vita-rust/std"
+
+authors = ["vita-sdk", "Nikolay Arhipov <n@arhipov.net>"]
+keywords = ["vita", "homebrew"]
+
+[features]
+pipe2 = []
+socketpair = []
+
+[dependencies]
+libc = "0.2.149"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+default-target = "armv7-sony-vita-newlibeabihf"
+targets = []
+cargo-args = ["-Z", "build-std"]

README.md

@@ -1,19 +1,39 @@
-# std
+# vita-newlib-shims
 
-[![Rust](https://github.com/vita-rust/std/workflows/check/badge.svg)](https://github.com/vita-rust/std/actions)
 
-This repository hosts source code for crates intended to improve Rust std support for PlayStation Vita.
+[![MIT/Apache 2.0](https://img.shields.io/badge/license-MIT%2FApache-blue.svg)](https://github.com/vita-rust/vita-newlib-shims#license)
+[![Crates.io](https://img.shields.io/crates/v/vita-newlib-shims.svg)](https://crates.io/crates/vita-newlib-shims)
+[![GitHub Actions Build Status](https://img.shields.io/github/actions/workflow/status/vita-rust/vita-newlib-shims/release.yml)](https://github.com/vita-rust/vita-newlib-shims/actions/workflows/release.yml)
+[![Current Release](https://img.shields.io/github/release/vita-rust/vita-newlib-shims.svg)](https://github.com/vita-rust/vita-newlib-shims/releases)
+[![Main Commits RSS Feed](https://img.shields.io/badge/rss-commits-ffa500?logo=rss)](https://github.com/vita-rust/vita-newlib-shims/commits/main.atom)
 
-## [vita-newlib-shims](./crates/vita-newlib-shims/README.md)
+Standard library support for PlayStation Vita in Rust relies on Vita SDK newlib. Unfortunately, [not all](https://github.com/vitasdk/newlib/issues/86) of the POSIX functions are implemented in it.
 
-[![Crates.io](https://img.shields.io/crates/v/vita-newlib-shims.svg)](https://crates.io/crates/vita-newlib-shims)
-[![MIT/Apache 2.0](https://img.shields.io/badge/license-MIT%2FApache-blue.svg)](https://github.com/vita-rust/std#license)
+This repository aims to temporarily fix that by providing shims for the missing functions.
+
+To use this crate:
+
+1. Add it as a dependency to your project
+
+   ```bash
+   cargo add vita-newlib-shims
+   ```
+2. Import this crate in the root of your project:
+
+   ```rust
+   #[cfg(target_os = "vita")]
+   use vita_newlib_shims as _;
+   ```
+3. `VITASDK` environment variable must be set to your [Vita SDK] location.
+
+During build this crate will check the exported symbols from the `libc.a` object file using `arm-vita-eabi-nm` of your [Vita SDK] installation, and will only provide shims for the missing functions.
 
-Shims functions missing from Vita SDK newlib.
 
 ## License
 
 Except where noted (below and/or in individual files), all code in this repository is dual-licensed at your option under either:
 
 * MIT License ([LICENSE-MIT](LICENSE-MIT) or [http://opensource.org/licenses/MIT](http://opensource.org/licenses/MIT))
 * Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or [http://www.apache.org/licenses/LICENSE-2.0](http://www.apache.org/licenses/LICENSE-2.0))
+
+[Vita SDK]: https://vitasdk.org

build.rs

@@ -0,0 +1,46 @@
+use std::{collections::HashMap, path::Path, process::Command};
+
+const FEATURES: &[&str] = &["socketpair", "pipe2"];
+
+fn main() {
+    if std::env::var("DOCS_RS").is_ok() {
+        return;
+    }
+
+    println!("cargo:rerun-if-env-changed=VITASDK");
+
+    let vitasdk = std::env::var("VITASDK").expect("VITASDK not set");
+    let vitasdk = Path::new(&vitasdk);
+
+    let libc_a = vitasdk.join("arm-vita-eabi").join("lib").join("libc.a");
+    let nm = vitasdk.join("bin").join("arm-vita-eabi-nm");
+
+    println!("cargo:rerun-if-changed={}", libc_a.display());
+    println!("cargo:rerun-if-changed={}", nm.display());
+
+    let nm_result = Command::new(nm)
+        .arg("-n")
+        .arg(libc_a)
+        .output()
+        .expect("nm failed")
+        .stdout;
+    let nm_result = String::from_utf8_lossy(&nm_result);
+    let nm_result = nm_result.lines();
+
+    let mut features = FEATURES
+        .iter()
+        .map(|f| (*f, false))
+        .collect::<HashMap<_, _>>();
+
+    for line in nm_result {
+        for (feature, enabled) in &mut features {
+            if line == format!("00000000 T {}", feature) {
+                *enabled = true;
+            }
+        }
+    }
+
+    for (feature, _) in features.iter().filter(|(_, enabled)| !**enabled) {
+        println!("cargo:rustc-cfg=feature=\"{}\"", feature);
+    }
+}