[CI] Integrate shellcheck

.github/workflows/ci.yml

@@ -90,8 +90,18 @@ jobs:
         retention-days: ${{ env.ARTIFACT_RETENTION_DAYS }}
         if-no-files-found: error
 
+  shellcheck:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Run shellcheck
+      run: ./scripts/ci-run-shellcheck.sh
+
   ci:
-    needs: [tag, clang-format, cppcheck]
+    needs: [tag, clang-format, cppcheck, shellcheck]
 
     strategy:
       matrix:
@@ -439,7 +449,7 @@ jobs:
       run: ./scripts/ci-update-homebrew-tap.sh
 
   ci-bsd:
-    needs: [tag, clang-format, cppcheck]
+    needs: [tag, clang-format, cppcheck, shellcheck]
     runs-on: ubuntu-latest
 
     permissions:

.shellcheckrc

@@ -0,0 +1 @@
+disable=SC2153

app/test/select-quotebuff-gen.sh

@@ -1,13 +1,13 @@
 #!/bin/sh
 
-i=0;
-while [ $i -lt 2000 ] ; do
+i=0
+while [ $i -lt 2000 ]; do
     j=0
-    while [ $j -lt 20 ] ; do
+    while [ $j -lt 20 ]; do
         printf '"a,b",'
-        j=$(($j+1))
+        j=$((j + 1))
     done
 
     echo ''
-    i=$(($i+1))
+    i=$((i + 1))
 done

scripts/ci-create-debian-package.sh

@@ -52,7 +52,7 @@ mv -f "./$PREFIX/bin" "./$PREFIX/usr/"
 
 echo "[INF] Creating control file [$DEBIAN_CONTROL_FILE]"
 
-INSTALLED_SIZE="$(echo $(du -s -c $PREFIX/usr/* | grep 'total') | cut -d ' ' -f1)"
+INSTALLED_SIZE="$(du -s -c "$PREFIX"/usr/* | grep 'total' | xargs | cut -d ' ' -f1)"
 cat <<EOF >"$DEBIAN_CONTROL_FILE"
 Package: zsv
 Version: $VERSION

scripts/ci-run-shellcheck.sh

@@ -0,0 +1,54 @@
+#!/bin/sh
+
+set -e
+
+echo "[INF] Running $0"
+
+VERSION=$(shellcheck --version | grep 'version:' | cut -d ' ' -f2)
+if [ "$VERSION" = "" ]; then
+  echo "[ERR] shellcheck is not installed!"
+  exit 1
+fi
+
+echo "[INF] shellcheck version [$VERSION]"
+
+echo "[INF] Running shellcheck..."
+
+shellcheck --format=tty \
+  configure \
+  app/test/*.sh \
+  scripts/*.sh \
+  setup-action/scripts/*.bash || true
+
+if [ "$CI" = true ]; then
+  {
+    echo "<details>"
+    echo "<summary>Shellcheck Summary (tty format)</summary>"
+    echo
+    echo '```'
+    shellcheck --format=tty \
+      configure \
+      app/test/*.sh \
+      scripts/*.sh \
+      setup-action/scripts/*.bash \
+      2>&1 || true
+    echo '```'
+    echo "</details>"
+    echo
+    echo "<details>"
+    echo "<summary>Shellcheck Summary (diff format)</summary>"
+    echo
+    echo '```diff'
+    shellcheck --format=diff \
+      configure \
+      app/test/*.sh \
+      scripts/*.sh \
+      setup-action/scripts/*.bash \
+      2>&1 || true
+    echo '```'
+    echo "</details>"
+  } >>"$GITHUB_STEP_SUMMARY"
+fi
+
+echo "[INF] shellcheck ran successfully!"
+echo "[INF] --- [DONE] ---"