Add delete command -d

The missing piece for this shell program: easily delete bookmarkas as
well without having to being faced with all bookmarks with the -e edit
command. When one know the BOOKMARK_ID, it should be as easy as

$ cd-bookmark -d BOOKMAK_ID

to remove it!

Fixes mollifier#5

README.md

@@ -74,6 +74,7 @@ In the 3rd form, list current bookmark.
 * `-a` <var>[BOOKMARK\_ID]</var>  add current directory to bookmark<br />
                                 with no BOOKMARK\_ID, automatically use free ID number as BOOKMARK\_ID
 * `-c` <var>BOOKMARK\_ID</var>   change directory which is identified by BOOKMARK\_ID
+* `-d` <var>BOOKMARK\_ID</var>   delete directory which is identified by BOOKMARK\_ID
 * `-l`                           list bookmark
 * `-e`                           edit bookmark file
 * `-p` <var>BOOKMARK\_ID</var>   display bookmark real path for BOOKMARK\_ID
@@ -119,5 +120,8 @@ work|/home/mollifier/work
 # To edit bookmark, run cd-bookmark with -e option.
 % cd-bookmark -e
 # Open bookmark file with $EDITOR (vim, emacs, etc.), so you can edit bookmark.
+
+# To delete a bookmark, run cd-bookmark with -d option.
+% cd-bookmark -d work
 ```
 

_cd-bookmark

@@ -20,6 +20,7 @@ declare -a opts args
 args=(
   '(:)-a[add current directory to bookmark]:new_bookmark_id:_cd-bookmark_current_directory_name'
   '-c[change directory which is identified by BOOKMARK_ID]:bookmark_id:->bookmark_id_or_path'
+  '-d[delete directory which is identified by BOOKMARK_ID]:bookmark_id:->bookmark_id_or_path'
   '-l[list bookmark]'
   '-e[edit bookmark file]'
   '-p[display bookmark real path for BOOKMARK_ID]:bookmark_id:_cd-bookmark_bookmark_id'
@@ -82,4 +83,3 @@ return $ret
 # sh-basic-offset: 2
 # End:
 # vim: ft=zsh sw=2 ts=2 et
-

cd-bookmark

@@ -38,6 +38,7 @@ For example if 'cd-bookmark work' command will change current directory to '~/wo
   -a [BOOKMARK_ID]   add current directory to bookmark
                      with no BOOKMARK_ID, automatically use free ID number as BOOKMARK_ID
   -c BOOKMARK_ID     change directory which is identified by BOOKMARK_ID
+  -d BOOKMARK_ID     delete directory which is identified by BOOKMARK_ID
   -l                 list bookmark
   -e                 edit bookmark file
   -p BOOKMARK_ID     display bookmark real path for BOOKMARK_ID
@@ -50,6 +51,19 @@ function _cdbookmark_print_error() {
   echo "Try \`-h' option for more information." 1>&2
 }
 
+function _cdbookmark_delete_bookmark() {
+  local bookmark_id="$1"
+  local bookmark_dir="$(_cdbookmark_get_bookmark $bookmark_id)"
+
+  if [ -z "$bookmark_dir" ]; then
+    _cdbookmark_print_error "$bookmark_id is not in bookmark"
+    return 4
+  fi
+
+  local escaped_id="$(echo $bookmark_id | sed -e 's/[^a-zA-Z0-9<>]/\\&/g')"
+  sed -i -e "/^${escaped_id}|/d" "$BOOKMARK_FILE"
+}
+
 function _cdbookmark_edit_bookmark() {
   # open BOOKMARK_FILE with EDITOR.
   ${EDITOR:-vi} "$BOOKMARK_FILE"
@@ -145,7 +159,7 @@ function _cdbookmark_main() {
   local bookmark_id=""
 
   local option OPTARG OPTIND
-  while getopts ':ac:lep:h' option; do
+  while getopts ':ac:d:lep:h' option; do
     case $option in
       a)
         mode="add"
@@ -154,6 +168,10 @@ function _cdbookmark_main() {
         bookmark_id="$OPTARG"
         mode="cd"
         ;;
+      d)
+        bookmark_id="$OPTARG"
+        mode="delete"
+        ;;
       l)
         mode="list"
         ;;
@@ -208,6 +226,9 @@ function _cdbookmark_main() {
     cd)
       _cdbookmark_cd_to_bookmark "$bookmark_id"
       ;;
+    delete)
+      _cdbookmark_delete_bookmark "$bookmark_id"
+      ;;
     list)
       _cdbookmark_list_bookmark
       ;;