added yash alias jump script

yash/_yashrc

@@ -13,8 +13,9 @@ HISTSIZE=100000
 PS1P="\fi"
 FCEDIT=hx
 
-# prompt
+# prompt and z
 . ~/skynet/yash/polyglot.sh
+. ~/skynet/yash/z.sh
 
 # environment setup
 export PURE_GIT_PULL=0

yash/z.sh

@@ -0,0 +1,87 @@
+JUMP_LIST=~/.config/z/jump_list
+
+_z_exec() {
+  sqlite3 "$JUMP_LIST" "$@"
+  return $?
+}
+
+! [ -d ~/.config/z ] && mkdir -p ~/.config/z
+! [ -f "$JUMP_LIST" ] && _z_exec 'create table jump_list (alias text primary key, directory text not null)'
+
+_z_help() {
+  echo 'help:   z -h'
+  echo 'goto:   z alias'
+  echo 'list:   z -l'
+  echo 'add:    z -a alias /path/to/dir'
+  echo 'remove: z -r alias'
+}
+
+_z_list() {
+  _z_exec "select alias || ' -> ' || directory from jump_list order by alias"
+}
+
+_z_add() {
+  alias=$1
+  dir=$2
+  if [ -z "$dir" ]; then
+    dir=$(pwd)
+  fi
+  if [ ! -d "$dir" ]; then
+    echo "Directory not found: $dir"
+    return 1
+  fi
+  fullpath=$(cd "$dir"; pwd)
+  if [ ! -d "$fullpath" ]; then
+    echo "Could not change to directory: $fullpath"
+    return 1
+  else
+    alias_esc=$(echo "$alias" | sed "s/'/''/g")
+    fullpath_esc=$(echo "$fullpath" | sed "s/'/''/g")
+    if ! _z_exec "insert into jump_list values ('$alias_esc', '$fullpath_esc')"; then
+      echo "Error adding alias"
+      return 1
+    fi
+  fi
+}
+
+_z_remove() {
+  alias=$1
+  alias_esc=$(echo "$alias" | sed "s/'/''/g")
+  rows=$(_z_exec "delete from jump_list where alias='$alias_esc'; select changes()")
+  if [ "$rows" -eq 0 ]; then
+    echo "Alias not found: $alias"
+    return 1
+  fi
+}
+
+_z_goto() {
+  alias=$1
+  alias_esc=$(echo "$alias" | sed "s/'/''/g")
+  dir=$(_z_exec "select directory from jump_list where alias='$alias_esc'")
+  if [ -z "$dir" ]; then
+    echo "Alias not found: $alias"
+    return 1
+  elif [ ! -d "$dir" ]; then
+    echo "Directory not found: $dir"
+    return 1
+  else
+    cd "$dir"
+  fi
+}
+
+z() {
+  if [ $# -eq 0 ]; then
+    _z_help
+    return
+  fi
+  cmd=$1
+  shift
+  case $cmd in
+  '-h') _z_help;;
+  '-l') _z_list;;
+  '-a') _z_add "$@";;
+  '-r') _z_remove "$@";;
+  -*) echo "Unknown command: $cmd"; return 1;;
+  *) _z_goto "$cmd";;
+  esac
+}