ci: Format shell scripts

Set up `shfmt` configuration and apply it to our shell scripts with the
following:

     fd -e sh -x shfmt -w

Author: tgross35

.editorconfig

@@ -0,0 +1,7 @@
+[*.sh]
+# See https://github.com/mvdan/sh/blob/master/cmd/shfmt/shfmt.1.scd#examples
+indent_style = space
+indent_size = 4
+
+switch_case_indent = true
+space_redirects = true

ci/android-install-sdk.sh

@@ -15,27 +15,27 @@ wget -q --tries=20 "https://dl.google.com/android/repository/commandlinetools-li
 unzip -q -d sdk/cmdline-tools "commandlinetools-linux-${sdk}_latest.zip"
 
 case "$1" in
-  arm | armv7)
-    api=24
-    image="system-images;android-${api};default;armeabi-v7a"
-    ;;
-  aarch64)
-    api=24
-    image="system-images;android-${api};google_apis;arm64-v8a"
-    ;;
-  i686)
-    api=28
-    image="system-images;android-${api};default;x86"
-    ;;
-  x86_64)
-    api=28
-    image="system-images;android-${api};default;x86_64"
-    ;;
-  *)
-    echo "invalid arch: $1"
-    exit 1
-    ;;
-esac;
+    arm | armv7)
+        api=24
+        image="system-images;android-${api};default;armeabi-v7a"
+        ;;
+    aarch64)
+        api=24
+        image="system-images;android-${api};google_apis;arm64-v8a"
+        ;;
+    i686)
+        api=28
+        image="system-images;android-${api};default;x86"
+        ;;
+    x86_64)
+        api=28
+        image="system-images;android-${api};default;x86_64"
+        ;;
+    *)
+        echo "invalid arch: $1"
+        exit 1
+        ;;
+esac
 
 # Try to fix warning about missing file.
 # See https://askubuntu.com/a/1078784
@@ -53,9 +53,9 @@ echo '#Fri Nov 03 10:11:27 CET 2017 count=0' >> /root/.android/repositories.cfg
 # which produces an insane amount of output.
 yes | ./sdk/cmdline-tools/tools/bin/sdkmanager --licenses --no_https | grep -v = || true
 yes | ./sdk/cmdline-tools/tools/bin/sdkmanager --no_https \
-        "platform-tools" \
-        "platforms;android-${api}" \
-        "${image}" | grep -v = || true
+    "platform-tools" \
+    "platforms;android-${api}" \
+    "${image}" | grep -v = || true
 
 # The newer emulator versions (31.3.12 or higher) fail to a valid AVD and the test gets stuck.
 # Until we figure out why, we use the older version (31.3.11).

ci/install-musl.sh

@@ -25,14 +25,14 @@ case ${1} in
         musl_arch=aarch64
         kernel_arch=arm64
         CC=aarch64-linux-gnu-gcc \
-          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+            ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
         make install -j4
         ;;
     arm)
         musl_arch=arm
         kernel_arch=arm
         CC=arm-linux-gnueabihf-gcc CFLAGS="-march=armv6 -marm -mfpu=vfp" \
-          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+            ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
         make install -j4
         ;;
     i686)
@@ -43,7 +43,7 @@ case ${1} in
         # Specifically pass -m32 in CFLAGS and override CC when running
         # ./configure, since otherwise the script will fail to find a compiler.
         CC=gcc CFLAGS="-m32" \
-          ./configure --prefix="/musl-${musl_arch}" --disable-shared --target=i686
+            ./configure --prefix="/musl-${musl_arch}" --disable-shared --target=i686
         # unset CROSS_COMPILE when running make; otherwise the makefile will
         # call the non-existent binary 'i686-ar'.
         make CROSS_COMPILE= install -j4
@@ -58,21 +58,21 @@ case ${1} in
         musl_arch=s390x
         kernel_arch=s390
         CC=s390x-linux-gnu-gcc \
-          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+            ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
         make install -j4
         ;;
     loongarch64)
         musl_arch=loongarch64
         kernel_arch=loongarch
         CC=loongarch64-linux-gnu-gcc-14 \
-          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+            ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
         make install -j4
         ;;
     powerpc64*)
         musl_arch=powerpc64
         kernel_arch=powerpc
         CC="${1}-linux-gnu-gcc" CFLAGS="-mlong-double-64" \
-          ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
+            ./configure --prefix="/musl-${musl_arch}" --enable-wrapper=yes
         make install -j4
         ;;
     *)
@@ -81,7 +81,6 @@ case ${1} in
         ;;
 esac
 
-
 # shellcheck disable=SC2103
 cd ..
 rm -rf "$musl"
@@ -123,8 +122,8 @@ EOF
         base=$(basename "$url")
         curl --retry 5 -L "$url" > "$base"
         case $base in
-            linux-*) kernel=$base;;
-            patch-*) patch=$base;;
+            linux-*) kernel=$base ;;
+            patch-*) patch=$base ;;
         esac
         # Check if file is known
         grep -o "$base" alpine-sha512sums

ci/install-rust.sh

@@ -9,9 +9,9 @@ toolchain="${TOOLCHAIN:-nightly}"
 os="${OS:-}"
 
 case "$(uname -s)" in
-    Linux*)     os=linux ;;
-    Darwin*)    os=macos ;;
-    MINGW*)     os=windows ;;
+    Linux*) os=linux ;;
+    Darwin*) os=macos ;;
+    MINGW*) os=windows ;;
     *)
         echo "Unknown system $(uname -s)"
         exit 1
@@ -51,7 +51,7 @@ if [ "$os" = "windows" ]; then
 
     if [ -n "${ARCH_BITS:-}" ]; then
         echo "Fix MinGW"
-        for i in crt2.o dllcrt2.o libmingwex.a libmsvcrt.a ; do
+        for i in crt2.o dllcrt2.o libmingwex.a libmsvcrt.a; do
             cp -f "/C/ProgramData/Chocolatey/lib/mingw/tools/install/mingw$ARCH_BITS/$ARCH-w64-mingw32/lib/$i" "$(rustc --print sysroot)/lib/rustlib/$TARGET/lib"
         done
     fi
@@ -71,6 +71,6 @@ until [ $n -ge $N ]; do
         break
     fi
 
-    n=$((n+1))
+    n=$((n + 1))
     sleep 1
 done

ci/run-docker.sh

@@ -21,7 +21,7 @@ echo "${HOME}"
 pwd
 
 # Avoid "no space left on device" failure if running in CI
-if [ "${CI:-0}" != "0" ] && [ "$target" = "aarch64-linux-android" ] ; then
+if [ "${CI:-0}" != "0" ] && [ "$target" = "aarch64-linux-android" ]; then
     docker system prune -af
     docker system df
 fi

ci/run.sh

@@ -19,12 +19,12 @@ case "$target" in
     *android*) cmd="$cmd --manifest-path libc-test/Cargo.toml" ;;
     *s390x*) cmd="$cmd --manifest-path libc-test/Cargo.toml" ;;
     # For all other platforms, test everything in the workspace
-    *) cmd="$cmd --workspace"
+    *) cmd="$cmd --workspace" ;;
 esac
 
 # garando_errors only compiles on `cfg(any(unix, windows))`
 case "$target" in
-    *wasm*) cmd="$cmd --exclude ctest --exclude ctest-test --exclude ctest-next"
+    *wasm*) cmd="$cmd --exclude ctest --exclude ctest-test --exclude ctest-next" ;;
 esac
 
 if [ "$target" = "s390x-unknown-linux-gnu" ]; then
@@ -37,13 +37,13 @@ if [ "$target" = "s390x-unknown-linux-gnu" ]; then
         if [ "$passed" = "0" ]; then
             # shellcheck disable=SC2086
             if $cmd --no-default-features -- $test_flags; then
-                passed=$((passed+1))
+                passed=$((passed + 1))
                 continue
             fi
         elif [ "$passed" = "1" ]; then
             # shellcheck disable=SC2086
             if $cmd -- $test_flags; then
-                passed=$((passed+1))
+                passed=$((passed + 1))
                 continue
             fi
         elif [ "$passed" = "2" ]; then
@@ -52,7 +52,7 @@ if [ "$target" = "s390x-unknown-linux-gnu" ]; then
                 break
             fi
         fi
-        n=$((n+1))
+        n=$((n + 1))
         sleep 1
     done
 else

ci/style.sh

@@ -65,7 +65,7 @@ export LC_ALL=C
 
 for file in libc-test/semver/*.txt; do
     case "$file" in
-      *TODO*) continue ;;
+        *TODO*) continue ;;
     esac
 
     if ! sort -C "$file"; then
@@ -82,7 +82,7 @@ for file in libc-test/semver/*.txt; do
     fi
 done
 
-if shellcheck --version ; then
+if shellcheck --version; then
     find . -name '*.sh' -print0 | xargs -0 shellcheck
 else
     echo "shellcheck not found"

ci/verify-build.sh

@@ -14,9 +14,9 @@ filter="${FILTER:-}"
 host_target=$(rustc -vV | awk '/^host/ { print $2 }')
 
 case "$(uname -s)" in
-    Linux*)     os=linux ;;
-    Darwin*)    os=macos ;;
-    MINGW*)     os=windows ;;
+    Linux*) os=linux ;;
+    Darwin*) os=macos ;;
+    MINGW*) os=windows ;;
     *)
         echo "Unknown system $(uname -s)"
         exit 1
@@ -25,7 +25,7 @@ esac
 
 echo "Testing Rust $rust on $os"
 
-if [ "$TOOLCHAIN" = "nightly" ] ; then
+if [ "$TOOLCHAIN" = "nightly" ]; then
     # For build-std
     rustup component add rust-src
 fi
@@ -61,10 +61,10 @@ test_target() {
         N=5
         n=0
         until [ $n -ge $N ]; do
-            if rustup target add "$target" --toolchain "$rust" ; then
+            if rustup target add "$target" --toolchain "$rust"; then
                 break
             fi
-            n=$((n+1))
+            n=$((n + 1))
             sleep 1
         done
     fi
@@ -77,7 +77,7 @@ test_target() {
         # Test with the equivalent of __USE_TIME_BITS64
         RUST_LIBC_UNSTABLE_LINUX_TIME_BITS64=1 $cmd
         case "$target" in
-            arm*-gnu*|i*86*-gnu|powerpc-*-gnu*|mips*-gnu|sparc-*-gnu|thumb-*gnu*)
+            arm*-gnu* | i*86*-gnu | powerpc-*-gnu* | mips*-gnu | sparc-*-gnu | thumb-*gnu*)
                 # Test with the equivalent of _FILE_OFFSET_BITS=64
                 RUST_LIBC_UNSTABLE_GNU_FILE_OFFSET_BITS=64 $cmd
                 # Test with the equivalent of _TIME_BITS=64