Commit 248c6645 authored by Dan Nicolaescu's avatar Dan Nicolaescu
Browse files

(vc-hg-global-switches): Simplify.

(vc-hg-state): Handle more states.
(vc-hg-diff): Fix doc-string.
(vc-hg-register): New function.
(vc-hg-checkout): Likewise.
parent 37d4643c
2007-06-20 Dan Nicolaescu <dann@ics.uci.edu>
* vc-hg.el (vc-hg-global-switches): Simplify.
(vc-hg-state): Handle more states.
(vc-hg-diff): Fix doc-string.
(vc-hg-register): New function.
(vc-hg-checkout): Likewise.
2007-06-20 Reto Zimmermann <reto@gnu.org>
* progmodes/vera-mode.el: New file.
......
;;; vc-hg.el --- VC backend for the mercurial version control system
;; Copyright (C) 2006 Ivan Kanis
;; Copyright (C) 2006, 2007 Free Software Foundation, Inc.
;; Author: Ivan Kanis
;; $Id: vc-hg.el 1889 2007-06-17 12:39:26Z ivan $
;; Keywords: tools
;; Version: 1889
;;
;; This program is free software ; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
......@@ -22,18 +24,38 @@
;; This is a mercurial version control backend
;;; THANKS:
;;; Thanks:
;;; Bugs:
;;; Installation:
;;; Todo:
;; Implement the rest of the vc interface
;;; BUGS:
;; Implement Stefan Monnier's advice:
;; vc-hg-registered and vc-hg-state
;; Both of those functions should be super extra careful to fail gracefully in
;; unexpected circumstances. The most important such case is when the `hg'
;; executable is not available. The reason this is important is that any error
;; there will prevent the user from even looking at the file :-(
;; Ideally, just like in vc-arch and vc-cvs, checking that the file is under
;; mercurial's control and extracting the current revision should be done
;; without even using `hg' (this way even if you don't have `hg' installed,
;; Emacs is able to tell you this file is under mercurial's control).
;;; INSTALLATION:
;;; History:
;;
;;; Code:
(eval-when-compile
(require 'vc))
;; (setq vc-handled-backends '(CVS SVN hg))
;; XXX This should be moved to vc-hooks when the full vc interface is
;; implemented.
(add-to-list 'vc-handled-backends 'HG)
;;; Customization options
......@@ -44,44 +66,36 @@
(repeat :tag "Argument List"
:value ("")
string))
:version "22.1"
;; :version "22.2"
:group 'vc)
;;; State querying functions
;;; Modelled after the similar function in vc-bzr.el
(defun vc-hg-registered (file)
"Return t if FILE is registered in Hg"
(if (eq 0 (call-process "hg" nil nil nil
"--cwd" (file-name-directory file)
"status" (file-name-nondirectory file)))
(vc-file-setprop file 'vc-name file) nil))
"Return non-nil if FILE is registered with hg."
(if (vc-find-root file ".hg") ; short cut
(vc-hg-state file))) ; expensive
(defun vc-hg-state (file)
"Return state of files in Hg"
"Hg-specific version of `vc-state'."
(let ((out (vc-hg-internal-status file)))
(if (eq 0 (length out)) 'up-to-date
(let ((state (aref out 0)))
(cond
((eq state ?M) 'edited)
((eq state ?A) 'edited)
((eq state ?P) 'needs-patch)
((eq state ??) nil)
(t 'up-to-date))))))
(defun vc-hg-workfile-version (file)
"Return version number of file"
"Hg-specific version of `vc-workfile-version'."
(let ((out (vc-hg-internal-log file)))
(if (string-match "changeset: *\\([0-9]*\\)" out)
(match-string 1 out)
"0")))
(defun vc-hg-internal-log(file)
"Return log of FILE"
(with-output-to-string
(with-current-buffer
standard-output
(call-process
"hg" nil t nil "--cwd" (file-name-directory file)
"log" "-l1" (file-name-nondirectory file)))))
;;; History functions
(defun vc-hg-print-log(file &optional buffer)
......@@ -91,15 +105,6 @@
(if (and (vc-stay-local-p file) (fboundp 'start-process)) 'async 0)
file "log"))
(defun vc-hg-internal-status(file)
"Return status of FILE"
(with-output-to-string
(with-current-buffer
standard-output
(call-process
"hg" nil t nil "--cwd" (file-name-directory file)
"status" (file-name-nondirectory file)))))
(defun vc-hg-diff (file &optional oldvers newvers buffers)
"Get a difference report using hg between two versions of FILE."
(when buffers (message buffers))
......@@ -110,6 +115,29 @@
"--cwd" (file-name-directory file)
"diff" (file-name-nondirectory file)))
(defun vc-hg-register (file &optional rev comment)
"Register FILE under hg.
REV is ignored.
COMMENT is ignored."
(vc-hg-command nil nil file "add"))
;;; Modelled after the similar function in vc-bzr.el
(defun vc-hg-checkout (file &optional editable rev workfile)
"Retrieve a revision of FILE into a WORKFILE.
EDITABLE is ignored.
REV is the revision to check out into WORKFILE."
(unless workfile
(setq workfile (vc-version-backup-file-name file rev)))
(let ((coding-system-for-read 'binary)
(coding-system-for-write 'binary))
(with-temp-file workfile
(if rev
(vc-hg-command t nil file "cat" "-r" rev)
(vc-hg-command t nil file "cat")))))
(defun vc-hg-checkout-model (file)
'implicit)
;;; Internal functions
(defun vc-hg-command (buffer okstatus file &rest flags)
......@@ -122,5 +150,24 @@ and that it passes `vc-hg-global-switches' to it before FLAGS."
(append vc-hg-global-switches
flags))))
(defun vc-hg-internal-log (file)
"Return log of FILE."
(with-output-to-string
(with-current-buffer
standard-output
(call-process
"hg" nil t nil "--cwd" (file-name-directory file)
"log" "-l1" (file-name-nondirectory file)))))
(defun vc-hg-internal-status(file)
"Return status of FILE."
(with-output-to-string
(with-current-buffer
standard-output
(call-process
"hg" nil t nil "--cwd" (file-name-directory file)
"status" (file-name-nondirectory file)))))
(provide 'vc-hg)
;;; vc-hg.el ends here
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