chore: remove extension from tools

tools/init

@@ -0,0 +1,103 @@
+#!/usr/bin/env bash
+#
+# Init the evrionment for new user.
+
+set -eu
+
+ACTIONS_WORKFLOW=pages-deploy.yml
+
+TEMP_SUFFIX="to-delete" #  temporary file suffixes that make `sed -i` compatible with BSD and Linux
+
+help() {
+  echo "Usage:"
+  echo
+  echo "   bash /path/to/init.sh [options]"
+  echo
+  echo "Options:"
+  echo "     --no-gh              Do not deploy to Github."
+  echo "     -h, --help           Print this help information."
+}
+
+check_status() {
+  if [[ -n $(git status . -s) ]]; then
+    echo "Error: Commit unstaged files first, and then run this tool again."
+    exit -1
+  fi
+}
+
+check_init() {
+  local _has_inited=false
+
+  if [[ ! -d .github ]]; then # using option `--no-gh`
+    _has_inited=true
+  else
+    if [[ -f .github/workflows/$ACTIONS_WORKFLOW ]]; then
+      # on BSD, the `wc` could contains blank
+      local _count="$(find .github/workflows/ -type f -name "*.yml" | wc -l)"
+      if [[ ${_count//[[:blank:]]/} == 1 ]]; then
+        _has_inited=true
+      fi
+    fi
+  fi
+
+  if $_has_inited; then
+    echo "Already initialized."
+    exit 0
+  fi
+}
+
+init_files() {
+  if $_no_gh; then
+    rm -rf .github
+  else
+    ## Change the files of `.github`
+    mv .github/workflows/$ACTIONS_WORKFLOW.hook .
+    rm -rf .github
+    mkdir -p .github/workflows
+    mv ./${ACTIONS_WORKFLOW}.hook .github/workflows/${ACTIONS_WORKFLOW}
+
+    ## Cleanup image settings in site config
+    sed -i.$TEMP_SUFFIX "s/^img_cdn:.*/img_cdn:/;s/^avatar:.*/avatar:/" _config.yml
+    rm -f _config.yml.$TEMP_SUFFIX
+  fi
+
+  # trace the gem lockfile on user-end
+  sed -i.$TEMP_SUFFIX "/Gemfile.lock/d" .gitignore
+  rm -f ".gitignore.$TEMP_SUFFIX"
+
+  # remove the other fies
+  rm -rf _posts/*
+
+  # save changes
+  git add -A
+  git commit -m "chore: initialize the environment" -q
+
+  echo "[INFO] Initialization successful!"
+}
+
+check_status
+
+check_init
+
+_no_gh=false
+
+while (($#)); do
+  opt="$1"
+  case $opt in
+  --no-gh)
+    _no_gh=true
+    shift
+    ;;
+  -h | --help)
+    help
+    exit 0
+    ;;
+  *)
+    # unknown option
+    help
+    exit 1
+    ;;
+  esac
+done
+
+init_files