CI: Add shebangs and address shellcheck warnings

Author: jonas-schievink

cortex-m-rt/ci/install.sh

@@ -1,8 +1,10 @@
+#!/usr/bin/env bash
+
 set -euxo pipefail
 
 main() {
-    if [ $TARGET != x86_64-unknown-linux-gnu ]; then
-        rustup target add $TARGET
+    if [ "$TARGET" != x86_64-unknown-linux-gnu ]; then
+        rustup target add "$TARGET"
     fi
 
     mkdir gcc

cortex-m-rt/ci/script.sh

@@ -1,11 +1,13 @@
+#!/usr/bin/env bash
+
 set -euxo pipefail
 
 main() {
-    cargo check --target $TARGET
+    cargo check --target "$TARGET"
 
-    cargo check --target $TARGET --features device
+    cargo check --target "$TARGET" --features device
 
-    if [ $TARGET = x86_64-unknown-linux-gnu ] && [ $TRAVIS_RUST_VERSION = stable ]; then
+    if [ "$TARGET" = x86_64-unknown-linux-gnu ] && [ "$TRAVIS_RUST_VERSION" = stable ]; then
         ( cd macros && cargo check && cargo test )
 
         cargo test --features device --test compiletest
@@ -31,56 +33,56 @@ main() {
     local fail_examples=(
         data_overflow
     )
-    if [ $TARGET != x86_64-unknown-linux-gnu ]; then
+    if [ "$TARGET" != x86_64-unknown-linux-gnu ]; then
         # linking with GNU LD
         for ex in "${examples[@]}"; do
-            cargo rustc --target $TARGET --example $ex -- \
+            cargo rustc --target "$TARGET" --example "$ex" -- \
                   -C linker=arm-none-eabi-ld
 
-            cargo rustc --target $TARGET --example $ex --release -- \
+            cargo rustc --target "$TARGET" --example "$ex" --release -- \
                   -C linker=arm-none-eabi-ld
         done
         for ex in "${fail_examples[@]}"; do
-            ! cargo rustc --target $TARGET --example $ex -- \
+            ! cargo rustc --target "$TARGET" --example "$ex" -- \
                   -C linker=arm-none-eabi-ld
 
-            ! cargo rustc --target $TARGET --example $ex --release -- \
+            ! cargo rustc --target "$TARGET" --example "$ex" --release -- \
                   -C linker=arm-none-eabi-ld
         done
 
-        cargo rustc --target $TARGET --example device --features device -- \
+        cargo rustc --target "$TARGET" --example device --features device -- \
               -C linker=arm-none-eabi-ld
 
-        cargo rustc --target $TARGET --example device --features device --release -- \
+        cargo rustc --target "$TARGET" --example device --features device --release -- \
               -C linker=arm-none-eabi-ld
 
         # linking with rustc's LLD
         for ex in "${examples[@]}"; do
-            cargo rustc --target $TARGET --example $ex
-            cargo rustc --target $TARGET --example $ex --release
+            cargo rustc --target "$TARGET" --example "$ex"
+            cargo rustc --target "$TARGET" --example "$ex" --release
         done
         for ex in "${fail_examples[@]}"; do
-            ! cargo rustc --target $TARGET --example $ex
-            ! cargo rustc --target $TARGET --example $ex --release
+            ! cargo rustc --target "$TARGET" --example "$ex"
+            ! cargo rustc --target "$TARGET" --example "$ex" --release
         done
 
-        cargo rustc --target $TARGET --example device --features device
-        cargo rustc --target $TARGET --example device --features device --release
+        cargo rustc --target "$TARGET" --example device --features device
+        cargo rustc --target "$TARGET" --example device --features device --release
     fi
 
     case $TARGET in
         thumbv6m-none-eabi|thumbv7m-none-eabi)
             # linking with GNU LD
-            env RUSTFLAGS="-C linker=arm-none-eabi-ld -C link-arg=-Tlink.x" cargo run --target $TARGET --example qemu | grep "x = 42"
-            env RUSTFLAGS="-C linker=arm-none-eabi-ld -C link-arg=-Tlink.x" cargo run --target $TARGET --example qemu --release | grep "x = 42"
+            env RUSTFLAGS="-C linker=arm-none-eabi-ld -C link-arg=-Tlink.x" cargo run --target "$TARGET" --example qemu | grep "x = 42"
+            env RUSTFLAGS="-C linker=arm-none-eabi-ld -C link-arg=-Tlink.x" cargo run --target "$TARGET" --example qemu --release | grep "x = 42"
 
             # linking with rustc's LLD
-            cargo run --target $TARGET --example qemu | grep "x = 42"
-            cargo run --target $TARGET --example qemu --release | grep "x = 42"
+            cargo run --target "$TARGET" --example qemu | grep "x = 42"
+            cargo run --target "$TARGET" --example qemu --release | grep "x = 42"
             ;;
     esac
 
-    if [ $TARGET = x86_64-unknown-linux-gnu ]; then
+    if [ "$TARGET" = x86_64-unknown-linux-gnu ]; then
         ./check-blobs.sh
     fi
 }