Shellcheck shared action

.github/workflows/shell-check.yml

@@ -24,15 +24,8 @@ jobs:
     runs-on: ubuntu-latest
     if: "!contains(github.event.pull_request.title, '[bot]')"
     steps:
-      - name: Get checkout depth
-        run: |
-          echo "PR_FETCH_DEPTH=$(( ${{ github.event.pull_request.commits }} + 10 ))" >> $GITHUB_ENV
-
       - name: Checkout code
         uses: NVIDIA/spark-rapids-common/checkout@main
-        with:
-          fetch-depth: ${{ env.PR_FETCH_DEPTH }}
 
       - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
-
+        uses: NVIDIA/spark-rapids-common/shell-check@main

shell-check/action.yml

@@ -0,0 +1,84 @@
+# Copyright (c) 2025, NVIDIA CORPORATION.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: 'Shell Check'
+description: 'Check shell syntax'
+inputs:
+  excluded_codes:
+    description: "Excluded issue codes (comma-separated). e.g. SC2086,SC2046"
+    required: false
+    type: string
+    default: ""
+
+runs:
+  using: "composite"
+  steps:
+    - name: Configure ShellCheck Options
+      shell: bash
+      run: |
+        base_excludes=(
+          # Double quote to prevent globbing and word splitting.
+          "SC2086"
+          # Quote this to prevent word splitting.
+          "SC2046"
+          # Declare and assign separately to avoid masking return values.
+          "SC2155"
+          # Use $(...) notation instead of legacy backticks `...`.
+          "SC2006"
+          # Variable referenced but not assigned
+          "SC2154"
+          # Ranges can only match single chars (mentioned due to duplicates).
+          "SC2102"
+          # Prefer mapfile or read -a to split command output (or quote to avoid splitting).
+          "SC2207"
+          # Note that A && B || C is not if-then-else. C may run when A is true.
+          "SC2015"
+          # Argument mixes string and array. Use * or separate argument.
+          "SC2145"
+          # Variable appears unused. Verify use (or export if used externally).
+          "SC2034"
+          # Not following: File was not specified as input (see shellcheck -x).
+          "SC1091"
+          # Don't use ls | grep. Use a glob or a for loop with a condition to allow non-alphanumeric filenames.
+          "SC2010"
+          # This does not export 'VAR'. Remove $/${} for that, or use ${var?} to quiet.
+          "SC2163"
+          # See if you can use ${variable//search/replace} instead.
+          "SC2001"
+          # Use find instead of ls to better handle non-alphanumeric filenames.
+          "SC2012"
+          # Expressions don't expand in single quotes, use double quotes for that.
+          "SC2016"
+        )
+        final_excludes=("${base_excludes[@]}")
+        if [ -n "${{ inputs.excluded_codes }}" ]; then
+          IFS=',' read -r -a user_excludes <<< "${{ inputs.excluded_codes }}"
+          final_excludes+=("${user_excludes[@]}")
+        fi
+        SHELLCHECK_OPTS=""
+        for code in "${final_excludes[@]}"; do
+          SHELLCHECK_OPTS+=" -e $code"
+        done
+
+        SHELLCHECK_OPTS="${SHELLCHECK_OPTS# }"
+
+        echo "SHELLCHECK_OPTS=$SHELLCHECK_OPTS" >> $GITHUB_ENV
+      env:
+        GITHUB_ENV: ${{ github.env_path }}
+
+    - name: Run ShellCheck
+      uses: ludeeus/action-shellcheck@master
+      env:
+        SHELLCHECK_OPTS: ${{ env.SHELLCHECK_OPTS }}
+