ci: Use ./ with shebangs rather than sh or bash

The scripts say how they should execute, there isn't any reason to
duplicate this wherever they are called.

(backport <rust-lang#4124>)
(cherry picked from commit 4707c5d)

Author: tgross35

.github/workflows/ci.yaml

@@ -10,16 +10,20 @@ env:
   CARGO_TERM_VERBOSE: true
   LIBC_CI: 1
 
+defaults:
+  run:
+    shell: bash
+
 jobs:
   style_check:
     name: Style check
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: sh ./ci/install-rust.sh
+        run: ./ci/install-rust.sh
       - name: Check style
-        run: sh ci/style.sh
+        run: ./ci/style.sh
 
   build_channels_linux:
     name: Build Channels Linux
@@ -38,9 +42,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/install-rust.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/install-rust.sh
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/build.sh
 
   build_channels_macos:
     name: Build Channels macOS
@@ -60,9 +64,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=${{ matrix.target.toolchain }} sh ./ci/install-rust.sh
+        run: TOOLCHAIN=${{ matrix.target.toolchain }} ./ci/install-rust.sh
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.target.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.target.toolchain }} ./ci/build.sh
 
   build_channels_windows:
     name: Build Channels Windows
@@ -81,7 +85,7 @@ jobs:
         run: rustup self update
         shell: bash
       - name: Execute build.sh
-        run: TOOLCHAIN=${{ matrix.toolchain }} sh ./ci/build.sh
+        run: TOOLCHAIN=${{ matrix.toolchain }} ./ci/build.sh
         shell: bash
 
   macos:
@@ -95,9 +99,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run.sh
-        run: sh ./ci/run.sh ${{ matrix.target }}
+        run: ./ci/run.sh ${{ matrix.target }}
 
   windows:
     name: Windows
@@ -125,10 +129,10 @@ jobs:
         run: rustup self update
         shell: bash
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
         shell: bash
       - name: Execute run.sh
-        run: sh ./ci/run.sh ${{ matrix.target }}
+        run: ./ci/run.sh ${{ matrix.target }}
         shell: bash
 
   docker_linux_tier1:
@@ -143,9 +147,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run-docker.sh
-        run: sh ./ci/run-docker.sh ${{ matrix.target }}
+        run: ./ci/run-docker.sh ${{ matrix.target }}
 
   docker_linux_tier2:
     name: Docker Linux Tier2
@@ -185,9 +189,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TARGET=${{ matrix.target }} sh ./ci/install-rust.sh
+        run: TARGET=${{ matrix.target }} ./ci/install-rust.sh
       - name: Execute run-docker.sh
-        run: sh ./ci/run-docker.sh ${{ matrix.target }}
+        run: ./ci/run-docker.sh ${{ matrix.target }}
 
   solaris:
     name: Solaris
@@ -214,15 +218,15 @@ jobs:
             uname -a
           run: |
             export PATH=$HOME/.rust_solaris/bin:$PATH
-            bash ./ci/run.sh ${{ matrix.target }}
+            ./ci/run.sh ${{ matrix.target }}
 
   check_cfg:
     name: "Check #[cfg]s"
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
       - name: Setup Rust toolchain
-        run: TOOLCHAIN=nightly sh ./ci/install-rust.sh
+        run: TOOLCHAIN=nightly ./ci/install-rust.sh
       - name: Build with check-cfg
         run: LIBC_CHECK_CFG=1 cargo build -Z unstable-options -Z check-cfg
 

CONTRIBUTING.md

@@ -93,7 +93,7 @@ We have two automated tests running on
   - `cd libc-test && cargo test`
   - Use the `skip_*()` functions in `build.rs` if you really need a workaround.
 2. Style checker
-  - [`sh ci/style.sh`](https://github.com/rust-lang/libc/blob/main/ci/style.sh)
+  - [`./ci/style.sh`](https://github.com/rust-lang/libc/blob/main/ci/style.sh)
 
 ## Breaking change policy
 

ci/android-install-ndk.sh

@@ -201,7 +201,7 @@ esac
 for target in $targets; do
     if echo "$target" | grep -q "$filter"; then
         if [ "${OS}" = "windows" ]; then
-            TARGET="$target" sh ./ci/install-rust.sh
+            TARGET="$target" ./ci/install-rust.sh
             test_target build "$target"
         else
             test_target build "$target"

ci/android-install-sdk.sh

@@ -20,8 +20,8 @@ COPY android* /android/
 ENV ANDROID_ARCH=aarch64
 ENV PATH=$PATH:/android/linux-x86_64/bin:/android/sdk/cmdline-tools/tools:/android/sdk/platform-tools
 
-RUN sh /android/android-install-ndk.sh
-RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN /android/android-install-ndk.sh
+RUN /android/android-install-sdk.sh $ANDROID_ARCH
 RUN mv /root/.android /tmp
 RUN chmod 777 -R /tmp/.android
 RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linux-x86_64/*

ci/android-sysimage.sh

@@ -5,7 +5,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   gcc-aarch64-linux-gnu qemu-user
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh aarch64
+RUN /install-musl.sh aarch64
 
 # FIXME: shouldn't need the `-lgcc` here, shouldn't that be in std?
 ENV PATH=$PATH:/musl-aarch64/bin:/rust/bin \

ci/build.sh

@@ -20,8 +20,8 @@ COPY android* /android/
 ENV ANDROID_ARCH=arm
 ENV PATH=$PATH:/android/linux-x86_64/bin:/android/sdk/cmdline-tools/tools:/android/sdk/platform-tools
 
-RUN sh /android/android-install-ndk.sh
-RUN sh /android/android-install-sdk.sh $ANDROID_ARCH
+RUN /android/android-install-ndk.sh
+RUN /android/android-install-sdk.sh $ANDROID_ARCH
 RUN mv /root/.android /tmp
 RUN chmod 777 -R /tmp/.android
 RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linux-x86_64/*

ci/docker/aarch64-linux-android/Dockerfile

@@ -8,7 +8,7 @@ RUN sed -i -E 's/(archive|security)\.ubuntu\.com/old-releases.ubuntu.com/g' \
         gcc-arm-linux-gnueabihf qemu-user
 
 COPY install-musl.sh /
-RUN sh /install-musl.sh arm
+RUN /install-musl.sh arm
 
 ENV PATH=$PATH:/musl-arm/bin:/rust/bin \
     CC_arm_unknown_linux_musleabihf=musl-gcc \