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-;;; git_status.el --- Read-only git status tool for gptel -*- coding: utf-8; lexical-binding: t; -*-
-
-;; Author: Craig Jennings <c@cjennings.net>
-;; Keywords: convenience, tools, git
-
-;; This file is not part of GNU Emacs.
-
-;;; Commentary:
-
-;; Gptel tool returning `git status --short --branch' for a path under
-;; the user's home directory. Read-only: never writes to the repo,
-;; never runs anything that could mutate state. Path validation
-;; rejects anything outside HOME and any path that doesn't resolve to
-;; a directory inside a git working tree.
-
-;;; Code:
-
-(require 'gptel)
-(require 'cl-lib)
-
-(defun cj/gptel-git-status--validate-path (path)
- "Validate PATH as a usable working directory for a git status call.
-PATH must resolve under the user's home directory, must be an
-existing directory, and must be inside a git working tree. Returns
-the expanded path string on success; signals `error' otherwise."
- (let* ((home (file-name-as-directory (file-truename (expand-file-name "~"))))
- (full (expand-file-name (or path "~") "~")))
- (unless (string-prefix-p (expand-file-name "~") full)
- (error "Path must be within home directory: %s" path))
- (unless (file-directory-p full)
- (error "Not a directory: %s" full))
- (let ((resolved (file-truename full)))
- (unless (or (string= resolved (directory-file-name home))
- (string-prefix-p home resolved))
- (error "Resolved path must be within home directory: %s" path))
- (setq full resolved))
- (let ((default-directory full))
- (unless (zerop (process-file "git" nil nil nil
- "rev-parse" "--is-inside-work-tree"))
- (error "Not a git working tree: %s" full)))
- full))
-
-(defun cj/gptel-git-status--run (path)
- "Run `git status --short --branch' in PATH. Return the output.
-Color is disabled via `-c color.ui=false' at the git level (`git status'
-itself doesn't accept `--no-color' like `git log' / `git diff' do)."
- (let* ((dir (cj/gptel-git-status--validate-path path))
- (default-directory dir))
- (with-temp-buffer
- (let ((exit (process-file "git" nil t nil
- "-c" "color.ui=false"
- "status" "--short" "--branch")))
- (unless (zerop exit)
- (error "git status exited with %d: %s" exit (buffer-string)))
- ;; `--branch' always prints a `## <branch>' header, so empty
- ;; output is unreachable. Detect a clean tree by counting the
- ;; non-branch lines: if only the header is present, no files
- ;; are modified / staged / untracked.
- (let* ((out (buffer-string))
- (non-branch-lines
- (cl-count-if
- (lambda (l)
- (and (not (string-empty-p l))
- (not (string-prefix-p "## " l))))
- (split-string out "\n"))))
- (if (zerop non-branch-lines)
- (format "Clean working tree in %s\n%s" dir (string-trim out))
- out))))))
-
-(with-eval-after-load 'gptel
- (gptel-make-tool
- :name "git_status"
- :function (lambda (path) (cj/gptel-git-status--run path))
- :description "Return the output of `git status --short --branch' for a directory in the user's home tree. Read-only. Useful for seeing which files are modified, staged, or untracked, and how the current branch compares to its upstream."
- :args (list '(:name "path"
- :type string
- :description "Directory inside a git working tree. Either an absolute path under the user's home directory or a path relative to it (e.g. 'code/myproject')."))
- :category "git"
- :confirm nil
- :include t)
-
- (add-to-list 'gptel-tools (gptel-get-tool '("git" "git_status"))))
-
-(provide 'git_status)
-;;; git_status.el ends here