[CI] add shellcheck-workflow

.github/workflows/scripts/add-codeowners-to-pr.sh

@@ -29,9 +29,9 @@ main () {
     # is only available through the API. To cut down on API calls to GitHub,
     # we use the latest reviews to determine which users to filter out.
     JSON=$(gh pr view "${PR}" --json "files,author,latestReviews" | tr -dc '[:print:]' | sed -E 's/\\[a-z]//g')
-    AUTHOR=$(printf "${JSON}"| jq -r '.author.login')
-    FILES=$(printf "${JSON}"| jq -r '.files[].path')
-    REVIEW_LOGINS=$(printf "${JSON}"| jq -r '.latestReviews[].author.login')
+    AUTHOR=$(echo -n "${JSON}"| jq -r '.author.login')
+    FILES=$(echo -n "${JSON}"| jq -r '.files[].path')
+    REVIEW_LOGINS=$(echo -n "${JSON}"| jq -r '.latestReviews[].author.login')
     COMPONENTS=$(bash "${CUR_DIRECTORY}/get-components.sh")
     REVIEWERS=""
     LABELS=""
@@ -59,14 +59,14 @@ main () {
         # won't be checked against the remaining components in the components
         # list. This provides a meaningful speedup in practice.
         for FILE in ${FILES}; do
-            MATCH=$(echo "${FILE}" | grep -E "^${COMPONENT}" || true)
+            MATCH=$(echo -n "${FILE}" | grep -E "^${COMPONENT}" || true)
 
             if [[ -z "${MATCH}" ]]; then
                 continue
             fi
 
             # If we match a file with a component we don't need to process the file again.
-            FILES=$(printf "${FILES}" | grep -v "${FILE}")
+            FILES=$(echo -n "${FILES}" | grep -v "${FILE}")
 
             if [[ -v PROCESSED_COMPONENTS["${COMPONENT}"] ]]; then
                 continue
@@ -87,11 +87,11 @@ main () {
                 if [[ -n "${REVIEWERS}" ]]; then
                     REVIEWERS+=","
                 fi
-                REVIEWERS+=$(echo "${OWNER}" | sed -E 's/@(.+)/"\1"/')
+                REVIEWERS+=$(echo -n "${OWNER}" | sed -E 's/@(.+)/"\1"/')
             done
 
             # Convert the CODEOWNERS entry to a label
-            COMPONENT_NAME=$(echo "${COMPONENT}" | sed -E 's%^(.+)/(.+)\1%\1/\2%')
+            COMPONENT_NAME=$(echo -n "${COMPONENT}" | sed -E 's%^(.+)/(.+)\1%\1/\2%')
 
             if (( "${#COMPONENT_NAME}" > 50 )); then
                 echo "'${COMPONENT_NAME}' exceeds GitHub's 50-character limit on labels, skipping adding label"

.github/workflows/scripts/check-collector-module-version.sh

@@ -20,8 +20,8 @@ get_collector_version() {
    main_mod_file="$2"
 
    if grep -q "$collector_module" "$main_mod_file"; then
-      grep "$collector_module" "$main_mod_file" | (read mod version rest;
-         echo $version)
+      grep "$collector_module" "$main_mod_file" | (read -r mod version rest;
+         echo "$version")
    else
       echo "Error: failed to retrieve the \"$collector_module\" version from \"$main_mod_file\"."
       exit 1
@@ -53,15 +53,15 @@ BETA_MODULE="go.opentelemetry.io/collector"
 # only and does not return string which contains this string as a substring.
 BETA_MOD_VERSION=$(get_collector_version "$BETA_MODULE " "$MAIN_MOD_FILE")
 check_collector_versions_correct "$BETA_MODULE" "$BETA_MOD_VERSION"
-for mod in ${beta_modules[@]}; do
+for mod in "${beta_modules[@]}"; do
    check_collector_versions_correct "$mod" "$BETA_MOD_VERSION"
 done
 
 # Check stable modules, none currently exist, uncomment when pdata is 1.0.0
 STABLE_MODULE="go.opentelemetry.io/collector/pdata"
 STABLE_MOD_VERSION=$(get_collector_version "$STABLE_MODULE" "$MAIN_MOD_FILE")
 check_collector_versions_correct "$STABLE_MODULE" "$STABLE_MOD_VERSION"
-for mod in ${stable_modules[@]}; do
+for mod in "${stable_modules[@]}"; do
    check_collector_versions_correct "$mod" "$STABLE_MOD_VERSION"
 done
 

.github/workflows/scripts/get-codeowners.sh

@@ -20,9 +20,9 @@ get_codeowners() {
   #   ${1}: Insert first argument given to this function
   #   [\/]\?: Match 0 or 1 instances of a forward slash
   #   \s: Match any whitespace character
-  echo "$((grep -m 1 "^${1}[\/]\?\s" .github/CODEOWNERS || true) | \
+(grep -m 1 "^${1}[\/]\?\s" .github/CODEOWNERS || true) | \
         sed 's/   */ /g' | \
-        cut -f3- -d ' ')"
+        cut -f3- -d ' '
 }
 
 if [[ -z "${COMPONENT:-}" ]]; then

.github/workflows/scripts/mark-issues-as-stale.sh

@@ -60,10 +60,10 @@ for ISSUE in ${ISSUES}; do
 
         gh issue comment "${ISSUE}" -b "${STALE_MESSAGE}"
     else
-        printf "Pinging code owners for issue #${ISSUE}:\n${OWNER_MENTIONS}"
+        echo -e "Pinging code owners for issue #${ISSUE}:\n${OWNER_MENTIONS}"
 
         # The GitHub CLI only offers multiline strings through file input.
-        printf "${STALE_MESSAGE}\n\nPinging code owners:\n${OWNER_MENTIONS}\nSee [Adding Labels via Comments](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#adding-labels-via-comments) if you do not have permissions to add labels yourself." \
+        echo -e "${STALE_MESSAGE}\n\nPinging code owners:\n${OWNER_MENTIONS}\nSee [Adding Labels via Comments](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#adding-labels-via-comments) if you do not have permissions to add labels yourself." \
           | gh issue comment "${ISSUE}" -F -
     fi
 

.github/workflows/scripts/ping-codeowners-on-new-issue.sh

@@ -93,11 +93,11 @@ if [[ -n "${PING_LINES}" ]]; then
   #    workflow, so we have to ping code owners here.
   # 2. The GitHub CLI only offers multiline strings through file input,
   #    so we provide the comment through stdin.
-  # 3. The PING_LINES variable must be directly put into the printf string
+  # 3. The PING_LINES variable must be directly put into the echo string
   #    to get the newlines to render correctly, using string formatting
   #    causes the newlines to be interpreted literally.
-  printf "Pinging code owners:\n${PING_LINES}"
-  printf "Pinging code owners:\n${PING_LINES}\n%s" "${LABELS_COMMENT}"  \
+  echo -e "Pinging code owners:\n${PING_LINES}"
+  echo -e "Pinging code owners:\n${PING_LINES}\n%s" "${LABELS_COMMENT}"  \
   | gh issue comment "${ISSUE}" -F -
 else
   echo "No code owners were found to ping"

.github/workflows/scripts/setup_e2e_tests.sh

@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 TESTS="$(make -s -C testbed list-tests | xargs echo|sed 's/ /|/g')"
-TESTS=(${TESTS//|/ })
+TESTS=("${TESTS//|/ }")
 MATRIX="{\"include\":["
 curr=""
 for i in "${!TESTS[@]}"; do
@@ -20,4 +20,4 @@ else
 fi
 done
 MATRIX+=",{\"test\":\"$curr\"}]}"
-echo "loadtest_matrix=$MATRIX" >> $GITHUB_OUTPUT
+echo "loadtest_matrix=$MATRIX" >> "$GITHUB_OUTPUT"

.github/workflows/shellcheck.yaml

@@ -0,0 +1,32 @@
+name: shellcheck
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+permissions: {}
+
+jobs:
+  shellcheck:
+    name: shellcheck
+    runs-on: ubuntu-latest
+    env:
+      VERSION: v0.10.0
+    steps:
+      - uses: actions/checkout@v4
+      - name: shellcheck workflow-scripts
+        uses: ludeeus/action-shellcheck@2.0.0
+        env:
+          SHELLCHECK_OPTS: -x -e SC2059 -e SC2086
+        with:
+          scandir: ".github/workflows/scripts"
+          severity: warning
+          version: ${{ env.VERSION }}
+      - name: shellcheck buildscripts
+        uses: ludeeus/action-shellcheck@2.0.0
+        env:
+          SHELLCHECK_OPTS: -x -e SC2059 -e SC2086
+        with:
+          scandir: "internal/buildscripts"
+          severity: warning
+          version: ${{ env.VERSION }}

internal/buildscripts/packaging/fpm/common.sh

@@ -3,49 +3,52 @@
 # Copyright The OpenTelemetry Authors
 # SPDX-License-Identifier: Apache-2.0
 
-FPM_DIR="$( cd "$( dirname ${BASH_SOURCE[0]} )" && pwd )"
-
-PKG_NAME="otel-contrib-collector"
-PKG_VENDOR="OpenTelemetry Community"
-PKG_MAINTAINER="OpenTelemetry Community <cncf-opentelemetry-community@lists.cncf.io>"
-PKG_DESCRIPTION="OpenTelemetry Contrib Collector"
-PKG_LICENSE="Apache 2.0"
-PKG_URL="https://github.com/open-telemetry/opentelemetry-collector-contrib"
-PKG_USER="otel"
-PKG_GROUP="otel"
-
-SERVICE_NAME="otel-contrib-collector"
-PROCESS_NAME="otelcontribcol"
-
-CONFIG_PATH="$REPO_DIR/examples/demo/otel-collector-config.yaml"
-SERVICE_PATH="$FPM_DIR/$SERVICE_NAME.service"
-ENVFILE_PATH="$FPM_DIR/$SERVICE_NAME.conf"
-PREINSTALL_PATH="$FPM_DIR/preinstall.sh"
-POSTINSTALL_PATH="$FPM_DIR/postinstall.sh"
-PREUNINSTALL_PATH="$FPM_DIR/preuninstall.sh"
+FPM_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+export FPM_DIR
+
+export PKG_NAME="otel-contrib-collector"
+export PKG_VENDOR="OpenTelemetry Community"
+export PKG_MAINTAINER="OpenTelemetry Community <cncf-opentelemetry-community@lists.cncf.io>"
+export PKG_DESCRIPTION="OpenTelemetry Contrib Collector"
+export PKG_LICENSE="Apache 2.0"
+export PKG_URL="https://github.com/open-telemetry/opentelemetry-collector-contrib"
+export PKG_USER="otel"
+export PKG_GROUP="otel"
+
+export SERVICE_NAME="otel-contrib-collector"
+export PROCESS_NAME="otelcontribcol"
+
+export CONFIG_PATH="$REPO_DIR/examples/demo/otel-collector-config.yaml"
+export SERVICE_PATH="$FPM_DIR/$SERVICE_NAME.service"
+export ENVFILE_PATH="$FPM_DIR/$SERVICE_NAME.conf"
+export PREINSTALL_PATH="$FPM_DIR/preinstall.sh"
+export POSTINSTALL_PATH="$FPM_DIR/postinstall.sh"
+export PREUNINSTALL_PATH="$FPM_DIR/preuninstall.sh"
 
 docker_cp() {
     local container="$1"
     local src="$2"
     local dest="$3"
-    local dest_dir="$( dirname "$dest" )"
+    local dest_dir
+    dest_dir="$( dirname "$dest" )"
 
     echo "Copying $src to $container:$dest ..."
-    podman exec $container mkdir -p "$dest_dir"
-    podman cp "$src" $container:"$dest"
+    podman exec "$container" mkdir -p "$dest_dir"
+    podman cp "$src" "$container":"$dest"
 }
 
 install_pkg() {
     local container="$1"
     local pkg_path="$2"
-    local pkg_base=$( basename "$pkg_path" )
+    local pkg_base
+    pkg_base=$( basename "$pkg_path" )
 
     echo "Installing $pkg_base ..."
-    docker_cp $container "$pkg_path" /tmp/$pkg_base
+    docker_cp "$container" "$pkg_path" /tmp/"$pkg_base"
     if [[ "${pkg_base##*.}" = "deb" ]]; then
-        podman exec $container dpkg -i /tmp/$pkg_base
+        podman exec "$container" dpkg -i /tmp/"$pkg_base"
     else
-        podman exec $container rpm -ivh /tmp/$pkg_base
+        podman exec "$container" rpm -ivh /tmp/"$pkg_base"
     fi
 }
 
@@ -56,8 +59,8 @@ uninstall_pkg() {
 
     echo "Uninstalling $pkg_name ..."
     if [[ "$pkg_type" = "deb" ]]; then
-        podman exec $container dpkg -r $pkg_name
+        podman exec "$container" dpkg -r "$pkg_name"
     else
-        podman exec $container rpm -e $pkg_name
+        podman exec "$container" rpm -e "$pkg_name"
     fi
 }

internal/buildscripts/packaging/fpm/deb/build.sh

@@ -5,14 +5,14 @@
 
 set -euxo pipefail
 
-SCRIPT_DIR="$( cd "$( dirname ${BASH_SOURCE[0]} )" && pwd )"
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 REPO_DIR="$( cd "$SCRIPT_DIR/../../../../../" && pwd )"
 VERSION="${1:-}"
 ARCH="${2:-"amd64"}"
 OUTPUT_DIR="${3:-"$REPO_DIR/dist/"}"
 OTELCONTRIBCOL_PATH="$REPO_DIR/bin/otelcontribcol_linux_$ARCH"
 
-. $SCRIPT_DIR/../common.sh
+. "$SCRIPT_DIR"/../common.sh
 
 if [[ -z "$VERSION" ]]; then
     latest_tag="$( git describe --abbrev=0 --match v[0-9]* )"
@@ -21,7 +21,7 @@ fi
 
 mkdir -p "$OUTPUT_DIR"
 
-fpm -s dir -t deb -n $PKG_NAME -v ${VERSION#v} -f -p "$OUTPUT_DIR" \
+fpm -s dir -t deb -n "$PKG_NAME" -v "${VERSION#v}" -f -p "$OUTPUT_DIR" \
     --vendor "$PKG_VENDOR" \
     --maintainer "$PKG_MAINTAINER" \
     --description "$PKG_DESCRIPTION" \
@@ -34,7 +34,7 @@ fpm -s dir -t deb -n $PKG_NAME -v ${VERSION#v} -f -p "$OUTPUT_DIR" \
     --before-install "$PREINSTALL_PATH" \
     --after-install "$POSTINSTALL_PATH" \
     --pre-uninstall "$PREUNINSTALL_PATH" \
-    $SERVICE_PATH=/lib/systemd/system/$SERVICE_NAME.service \
-    $OTELCONTRIBCOL_PATH=/usr/bin/otelcontribcol \
-    $CONFIG_PATH=/etc/otel-contrib-collector/config.yaml \
-    $ENVFILE_PATH=/etc/otel-contrib-collector/otel-contrib-collector.conf
+    "$SERVICE_PATH"=/lib/systemd/system/"$SERVICE_NAME".service \
+    "$OTELCONTRIBCOL_PATH"=/usr/bin/otelcontribcol \
+    "$CONFIG_PATH"=/etc/otel-contrib-collector/config.yaml \
+    "$ENVFILE_PATH"=/etc/otel-contrib-collector/otel-contrib-collector.conf

internal/buildscripts/packaging/fpm/rpm/build.sh

@@ -5,14 +5,14 @@
 
 set -euxo pipefail
 
-SCRIPT_DIR="$( cd "$( dirname ${BASH_SOURCE[0]} )" && pwd )"
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 REPO_DIR="$( cd "$SCRIPT_DIR/../../../../../" && pwd )"
 VERSION="${1:-}"
 ARCH="${2:-"amd64"}"
 OUTPUT_DIR="${3:-"$REPO_DIR/dist/"}"
 OTELCONTRIBCOL_PATH="$REPO_DIR/bin/otelcontribcol_linux_$ARCH"
 
-. $SCRIPT_DIR/../common.sh
+. "$SCRIPT_DIR"/../common.sh
 
 if [[ -z "$VERSION" ]]; then
     latest_tag="$( git describe --abbrev=0 --match v[0-9]* )"
@@ -27,7 +27,7 @@ fi
 
 mkdir -p "$OUTPUT_DIR"
 
-fpm -s dir -t rpm -n $PKG_NAME -v ${VERSION#v} -f -p "$OUTPUT_DIR" \
+fpm -s dir -t rpm -n "$PKG_NAME" -v "${VERSION#v}" -f -p "$OUTPUT_DIR" \
     --vendor "$PKG_VENDOR" \
     --maintainer "$PKG_MAINTAINER" \
     --description "$PKG_DESCRIPTION" \
@@ -40,7 +40,7 @@ fpm -s dir -t rpm -n $PKG_NAME -v ${VERSION#v} -f -p "$OUTPUT_DIR" \
     --before-install "$PREINSTALL_PATH" \
     --after-install "$POSTINSTALL_PATH" \
     --pre-uninstall "$PREUNINSTALL_PATH" \
-    $SERVICE_PATH=/lib/systemd/system/$SERVICE_NAME.service \
-    $OTELCONTRIBCOL_PATH=/usr/bin/otelcontribcol \
-    $CONFIG_PATH=/etc/otel-contrib-collector/config.yaml \
-    $ENVFILE_PATH=/etc/otel-contrib-collector/otel-contrib-collector.conf
+    "$SERVICE_PATH"=/lib/systemd/system/"$SERVICE_NAME".service \
+    "$OTELCONTRIBCOL_PATH"=/usr/bin/otelcontribcol \
+    "$CONFIG_PATH"=/etc/otel-contrib-collector/config.yaml \
+    "$ENVFILE_PATH"=/etc/otel-contrib-collector/otel-contrib-collector.conf

internal/buildscripts/packaging/fpm/test.sh

@@ -5,11 +5,12 @@
 
 set -euov pipefail
 
-SCRIPT_DIR="$( cd "$( dirname ${BASH_SOURCE[0]} )" && pwd )"
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 REPO_DIR="$( cd "$SCRIPT_DIR/../../../../" && pwd )"
+export REPO_DIR
 PKG_PATH="${1:-}"
 
-. $SCRIPT_DIR/common.sh
+. "$SCRIPT_DIR"/common.sh
 
 if [[ -z "$PKG_PATH" ]]; then
     echo "usage: ${BASH_SOURCE[0]} DEB_OR_RPM_PATH" >&2
@@ -32,10 +33,10 @@ image_name="otelcontribcol-$pkg_type-test"
 container_name="$image_name"
 container_exec="podman exec $container_name"
 
-trap "podman rm -fv $container_name >/dev/null 2>&1 || true" EXIT
+trap 'podman rm -fv $container_name >/dev/null 2>&1 || true' EXIT
 
-podman build -t $image_name -f "$SCRIPT_DIR/$pkg_type/Dockerfile.test" "$SCRIPT_DIR"
-podman rm -fv $container_name >/dev/null 2>&1 || true
+podman build -t "$image_name" -f "$SCRIPT_DIR/$pkg_type/Dockerfile.test" "$SCRIPT_DIR"
+podman rm -fv "$container_name" >/dev/null 2>&1 || true
 
 # test install
 CRUN_VER='1.14.4'
@@ -52,8 +53,8 @@ crun = [
 EOF
 
 echo
-podman run --name $container_name -d $image_name
-install_pkg $container_name "$PKG_PATH"
+podman run --name "$container_name" -d "$image_name"
+install_pkg "$container_name" "$PKG_PATH"
 
 # ensure service has started and still running after 5 seconds
 sleep 5
@@ -65,7 +66,7 @@ $container_exec pgrep -a -u otel $PROCESS_NAME
 
 # test uninstall
 echo
-uninstall_pkg $container_name $pkg_type
+uninstall_pkg "$container_name" "$pkg_type"
 
 echo "Checking $SERVICE_NAME service status after uninstall ..."
 if $container_exec systemctl --no-pager status $SERVICE_NAME; then