build(deps-dev): remove package rollup-plugin-license (#1796)

The `rollup-plugin-license` has been using too many deprecated dependencies, so it is necessary to remove it.

As an alternative, this changes uses Rollup `output.banner` to insert copyright information. Since `terser` runs after `output`, it is not possible to insert the Front Matter defining permlink for `sw.js` through the same way (Jekyll Front Matter is YAML rather than JS, which would cause errors with terser).

Therefore, _Jekyll Collection_ is now used to add permlink to `sw.js`, with the collection named `app`, and the directory placed in `_app`. This directory is not tracked by git, but it will be included when building the gem.

tools/init.sh

@@ -92,7 +92,7 @@ init_files() {
   npm i && npm run build
 
   # track the CSS/JS output
-  _sedi "/.*\/dist$/d" .gitignore
+  _sedi "/.*\/dist$/d;/^_app$/d" .gitignore
 }
 
 commit() {

tools/release.sh

@@ -17,6 +17,7 @@ CONFIG="_config.yml"
 
 CSS_DIST="_sass/dist"
 JS_DIST="assets/js/dist"
+PWA_DIST="_app"
 
 FILES=(
   "$GEM_SPEC"
@@ -111,20 +112,13 @@ prepare() {
 
 ## Build a Gem package
 build_gem() {
-  if $opt_pkg; then
-    BACKUP_PATH="$(mktemp -d)"
-    mkdir -p "$BACKUP_PATH"/css "$BACKUP_PATH"/js
-    [[ -d $CSS_DIST ]] && cp "$CSS_DIST"/* "$BACKUP_PATH"/css
-    [[ -d $JS_DIST ]] && cp "$JS_DIST"/* "$BACKUP_PATH"/js
-  fi
-
   # Remove unnecessary theme settings
   sed -i -E "s/(^timezone:).*/\1/;s/(^cdn:).*/\1/;s/(^avatar:).*/\1/" $CONFIG
   rm -f ./*.gem
 
   npm run build
   # add CSS/JS distribution files to gem package
-  git add "$CSS_DIST" "$JS_DIST" -f
+  git add "$CSS_DIST" "$JS_DIST" "$PWA_DIST" -f
 
   echo -e "\n> gem build $GEM_SPEC\n"
   gem build "$GEM_SPEC"
@@ -132,14 +126,6 @@ build_gem() {
   echo -e "\n> Resume file changes ...\n"
   git reset
   git checkout .
-
-  if $opt_pkg; then
-    # restore the dist files for future development
-    mkdir -p "$CSS_DIST" "$JS_DIST"
-    cp "$BACKUP_PATH"/css/* "$CSS_DIST"
-    cp "$BACKUP_PATH"/js/* "$JS_DIST"
-    rm -rf "$BACKUP_PATH"
-  fi
 }
 
 # Push the gem to RubyGems.org (using $GEM_HOST_API_KEY)