on_file_change.yml

name: 2. On file change, update index pages

on:
  push:
    branches:
      - main
    paths-ignore:
      - '**/*.html'
      - '.github/**'

jobs:
  update-indexes:
    runs-on: ubuntu-latest  
    name: Update file index pages
    steps:
      - uses: actions/checkout@v3
        with:
          fetch-depth: 0 

      - name: Get dir_names of changed files
        id: changed-files-dir-names
        uses: tj-actions/changed-files@v35
        with:
          dir_names: "true"
          dir_names_exclude_root: "true"
          files_ignore: |
            .github
            .html

      - name: Generate index files
        run: |
          header_html="$(cat template_header.html)"
          footer_html="$(cat template_footer.html)"
          unique_release_dirs=()
          for dir in ${{ steps.changed-files-dir-names.outputs.all_modified_files }}
          do
            if [ ! -d "$dir" ]; then
              echo "$dir has been deleted"
              continue
            fi
            echo "$dir contains modified files"
            # Collect unique list of release folders
            release_dir=${dir%/*}
            if [[ ! " ${unique_release_dirs[@]} " =~ " ${release_dir} " ]]; then
              unique_release_dirs+=("$release_dir")
            fi
            type=${dir##*/} 
            ## MAKE FILE TABLE ##
            table_html=""
            table_html+="<table class=\"table table-striped table-bordered table-hover\">"
            table_html+="<thead class="table-dark"><tr><th>File Name</th><th>File Size</th><th>Last Modified</th></tr></thead>"
            table_html+=$'\n'
            # Loop through all files in the directory
            for file in $(find "$dir" -mindepth 1 -maxdepth 1 -type f ! -name "*.html" | sort)
            do
              if [[ -f "$file" ]]; then
                # Get the file name, size, and last modified date
                filename=$(basename "$file")
                filesize=$(du -h "$file" | cut -f1)
                modified=$(git log -1 --format=%cd --date=format:'%d %b %Y %l:%M %p' -- "$file")
                # Create a table row with the file information
                table_html+="<tr><td><a class="file-link" id="File" href=\"$filename\">$filename</a></td><td>$filesize</td><td>$modified</td></tr>"
                table_html+=$'\n'
              fi
            done
            table_html+="</table>"
            # Add parent link (expect top level index)
            table_html+='<p><a href="../">Parent directory</a></p>'
            # Assemble and save HTML
            file_html="$header_html$table_html$footer_html"
            echo "$file_html" > "$dir/index.html"
          done
          for release_dir in ${unique_release_dirs[@]}
          do
            ## MAKE FOLDER TABLE ##
            table_html=""
            table_html+="<table class=\"table table-striped table-bordered table-hover\">"
            table_html+="<thead class="table-dark"><tr><th>Folder Name</th><th>File Count</th><th>Last Modified</th></tr></thead>"
            table_html+=$'\n'
            # Loop through all folders in the directory
            for subdir in $(find "$release_dir" -mindepth 1 -maxdepth 1 -type d ! -name ".*" | sort)
            do
              folder=$(basename $subdir)
              # Get the count, and last modified date
              filecount=$(find $subdir -mindepth 1 -maxdepth 1 -type f ! -name "*.html" | wc -l)
              modified=$(git log -1 --format=%cd --date=format:'%d %b %Y %l:%M %p' -- "$subdir")
              # Create a table row with the file information 
              table_html+="<tr><td><a class="file-link" href=\"$folder\">$folder</a></td><td>$filecount</td><td>$modified</td></tr>"
              table_html+=$'\n'
            done
            table_html+="</table>"
            # Add parent link (expect top level index)
            table_html+='<p><a href="../">Parent directory</a></p>'
            # Assemble and save HTML
            folder_html="$header_html$table_html$footer_html"
            echo "$folder_html" > "$release_dir/index.html"
          done
          ## MAKE HOME TABLE ##
          # whether adding or deleting dirs
            table_html=""
            table_html+="<table class=\"table table-striped table-bordered table-hover\">"
            table_html+="<thead class="table-dark"><tr><th>Folder Name</th><th>File Count</th><th>Last Modified</th></tr></thead>"
            table_html+=$'\n'
            # Loop through all folders in the directory
            for subdir in $(find . -mindepth 1 -maxdepth 1 -type d ! -name ".*" | sort -rn)
            do
              folder=$(basename $subdir)
              # Get the count, and last modified date
              filecount=$(find $subdir -mindepth 2 -maxdepth 2 -type f ! -name "*.html" | wc -l)
              modified=$(git log -1 --format=%cd --date=format:'%d %b %Y %l:%M %p' -- "$subdir")
              # Create a table row with the file information 
              table_html+="<tr><td><a class="file-link" href=\"$folder\">$folder</a></td><td>$filecount</td><td>$modified</td></tr>"
              table_html+=$'\n'
            done
            table_html+="</table>"
            # Assemble and save HTML
            home_html="$header_html$table_html$footer_html"
            echo "$home_html" > "./index.html"
      - uses: stefanzweifel/git-auto-commit-action@v4
        with:
          commit_message: Update file index pages
          file_pattern: 'index.html **/index.html'