Add count-lines action

.github/workflows/self-dev.yml

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+name: Developer workflow
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  workflow_call:
+    inputs:
+      repo:
+        type: string
+        required: false
+
+env:
+  COUNT_LINES_REPO: ${{ inputs.repo || 'kir-dev/cmsch' }}
+
+jobs:
+  count-lines:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: ${{ env.COUNT_LINES_REPO }}
+      - uses: kir-dev/automations/actions/count-lines@main
+        id: counter
+        with:
+          target_directory: .
+      - name: Generate summary
+        run: |
+          echo 'There are ${{ steps.counter.outputs.line_count }} lines in this project' >> $GITHUB_STEP_SUMMARY

actions/count-lines/action.yml

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+name: "Count Lines"
+description: "Counts the number of lines in a specified directory and outputs the result."
+inputs:
+  target_directory:
+    description: "The directory to count lines in"
+    required: true
+  ignore_rule:
+    description: "Rule to apply for ignoring files: 'git' for .gitignore, 'hidden' for hidden directories, or 'none' for no exclusions."
+    required: true
+    default: "git"
+  command_path:
+    description: "Path to the script that will be executed"
+    required: true
+    default: $GITHUB_ACTION_PATH/../../scripts/count-lines.sh
+outputs:
+  line_count:
+    description: "The number of lines counted in the directory"
+    value: ${{ steps.run-script.outputs.line_count }}
+runs:
+  using: composite
+  steps:
+    - name: Run script
+      id: run-script
+      shell: bash
+      run: ${{ inputs.command_path }} ${{ inputs.target_directory }} ${{ inputs.ignore_rule }}

scripts/count-lines.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+set -x
+
+TARGET_DIR=$1
+IGNORE_RULE=$2
+
+# Enable this script to be executed locally
+: ${GITHUB_OUTPUT:=/dev/stdout}
+: ${GITHUB_STATE:=/dev/stdout}
+: ${GITHUB_STEP_SUMMARY:=/dev/stdout}
+: ${GITHUB_ENV:=/tmp/.github-env}
+
+if [[ -n "$GITHUB_ENV" && -f "$GITHUB_ENV" ]]; then
+  source "$GITHUB_ENV"
+fi
+
+if [ ! -d "$TARGET_DIR" ]; then
+    echo "Directory '$TARGET_DIR' not found" >&2
+    exit 1
+fi
+
+pushd "$TARGET_DIR"
+
+tree >&2
+
+function count_lines {
+    echo $(xargs wc --lines | tail -n 1 | awk '{print $1}')
+}
+
+case "$IGNORE_RULE" in
+    git)
+    line_count=$(git ls-files | count_lines)
+    ;;
+    hidden)
+    line_count=$(find . -type f -not -path '*/.*/*' | count_lines)
+    ;;
+    none)
+    line_count=$(find . -type f | count_lines)
+    ;;
+    *)
+    echo "Invalid IGNORE_RULE value. Use 'git', 'hidden', or 'none'" >&2
+    exit 1
+    ;;
+esac
+
+echo $GITHUB_OUTPUT >&2
+echo "line_count=$line_count" >> $GITHUB_OUTPUT
+
+popd