Use env bash and set strict shell options

Make shell usage explicit in CI and harden scripts for portability and safety. The workflow now sets shell: bash and calls scripts with bash; script shebangs were changed to #!/usr/bin/env bash and strict options (set -euo pipefail) were enabled. Minor fixes: ensure script invocations use bash and add missing trailing newlines. Affected files: .github/workflows/build-python.yml, android/build-all.sh, android/package-for-dart.sh, darwin/package-ios-for-dart.sh, darwin/package-macos-for-dart.sh, linux/package-for-linux.sh.

Author: FeodorFitsner

.github/workflows/build-python.yml

@@ -32,6 +32,7 @@ jobs:
 
       - name: Build Python for iOS and macOS
         working-directory: darwin
+        shell: bash
         run: |
           git clone --branch="$PYTHON_VERSION_SHORT" https://github.com/beeware/Python-Apple-support.git
           mkdir -p dist
@@ -42,8 +43,8 @@ jobs:
           make macOS
           popd
 
-          ./package-ios-for-dart.sh Python-Apple-support "$PYTHON_VERSION_SHORT"
-          ./package-macos-for-dart.sh Python-Apple-support "$PYTHON_VERSION_SHORT"
+          bash ./package-ios-for-dart.sh Python-Apple-support "$PYTHON_VERSION_SHORT"
+          bash ./package-macos-for-dart.sh Python-Apple-support "$PYTHON_VERSION_SHORT"
 
       - name: Upload Darwin build artifacts
         uses: actions/upload-artifact@v4
@@ -64,13 +65,14 @@ jobs:
           python-version: ${{ env.PYTHON_VERSION }}
       - run: python --version
       - working-directory: android
+        shell: bash
         run: |
-          ./build-all.sh "$PYTHON_VERSION"
+          bash ./build-all.sh "$PYTHON_VERSION"
           mkdir -p dist
           tar -czf dist/python-android-mobile-forge-$PYTHON_VERSION_SHORT.tar.gz install support
-          ./package-for-dart.sh install "$PYTHON_VERSION" arm64-v8a
-          ./package-for-dart.sh install "$PYTHON_VERSION" armeabi-v7a
-          ./package-for-dart.sh install "$PYTHON_VERSION" x86_64
+          bash ./package-for-dart.sh install "$PYTHON_VERSION" arm64-v8a
+          bash ./package-for-dart.sh install "$PYTHON_VERSION" armeabi-v7a
+          bash ./package-for-dart.sh install "$PYTHON_VERSION" x86_64
       - uses: actions/upload-artifact@v4
         with:
           name: python-android
@@ -85,9 +87,10 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - working-directory: linux
+        shell: bash
         run: |
-          ./package-for-linux.sh x86_64 "_v2"
-          ./package-for-linux.sh aarch64 ""
+          bash ./package-for-linux.sh x86_64 "_v2"
+          bash ./package-for-linux.sh aarch64 ""
       - uses: actions/upload-artifact@v4
         with:
           name: python-linux

android/build-all.sh

@@ -1,9 +1,9 @@
-#!/bin/bash
-set -eu
+#!/usr/bin/env bash
+set -euo pipefail
 
 python_version=${1:?}
 abis="arm64-v8a armeabi-v7a x86_64 x86"
 
 for abi in $abis; do
-    ./build.sh $python_version $abi
-done
+    bash ./build.sh $python_version $abi
+done

android/package-for-dart.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eu
+#!/usr/bin/env bash
+set -euo pipefail
 
 install_root=${1:?}
 python_version=${2:?}
@@ -65,4 +65,4 @@ done
 rm -rf $build_dir/lib
 
 # final archive
-tar -czf dist/python-android-dart-$python_version_short-$abi.tar.gz -C $build_dir .
+tar -czf dist/python-android-dart-$python_version_short-$abi.tar.gz -C $build_dir .

darwin/package-ios-for-dart.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eu
+#!/usr/bin/env bash
+set -euo pipefail
 
 python_apple_support_root=${1:?}
 python_version=${2:?}
@@ -72,4 +72,4 @@ rm -rf **/__pycache__
 cd -
 
 # final archive
-tar -czf dist/python-ios-dart-$python_version_short.tar.gz -C $build_dir .
+tar -czf dist/python-ios-dart-$python_version_short.tar.gz -C $build_dir .

darwin/package-macos-for-dart.sh

@@ -1,5 +1,5 @@
-#!/bin/bash
-set -eu
+#!/usr/bin/env bash
+set -euo pipefail
 
 python_apple_support_root=${1:?}
 python_version=${2:?}
@@ -43,4 +43,4 @@ rm -rf **/__pycache__
 cd -
 
 # final archive
-tar -czf dist/python-macos-dart-$python_version.tar.gz -C $build_dir .
+tar -czf dist/python-macos-dart-$python_version.tar.gz -C $build_dir .

linux/package-for-linux.sh

@@ -1,3 +1,6 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
 PYTHON_ARCH=${1:?}
 PYTHON_ARCH_VER=${2:-""}
 
@@ -14,4 +17,4 @@ mkdir -p $PYTHON_ARCH/dist
 rsync -av --exclude-from=python-linux-dart.exclude $PYTHON_ARCH/build/python/* $PYTHON_ARCH/dist
 
 # archive
-tar -czf python-linux-dart-$PYTHON_VERSION_SHORT-$PYTHON_ARCH.tar.gz -C $PYTHON_ARCH/dist .
+tar -czf python-linux-dart-$PYTHON_VERSION_SHORT-$PYTHON_ARCH.tar.gz -C $PYTHON_ARCH/dist .