changeset 13751:85d74f6babf6

patch: deprecate ui.patch / external patcher feature Why? - Mercurial internal patcher works correctly for regular patches and git patches, is much faster at least on Windows and is more extensible. - In theory, the external patcher can be used to handle exotic patch formats. I do not know any and have not heard about any such use in years. - Most patch programs cannot handle git format patches, which makes the API caller to decide either to ignore ui.patch by calling patch.internalpatch() directly, or take the risk of random failures with valid inputs. - One thing a patch program could do Mercurial patcher cannot is applying with --reverse. Apparently several shelve like extensions try to use that, including passing the "reverse" option to Mercurial patcher, which has been removed mid-2009. I never heard anybody complain about that, and would prefer reimplementing it anyway. And from the technical perspective: - The external patcher makes everything harder to maintain and implement. EOL normalization is not implemented, and I would bet file renames, if supported by the patcher, are not correctly recorded in the dirstate. - No tests. How? - Remove related documentation - Clearly mark patch.externalpatch() as private - Remove the debuginstall check. This deprecation request was actually triggered by this last point. debuginstall is the only piece of code patching without a repository. When migrating to an integrated patch() + updatedir() call, this was really a showstopper, all workarounds were either ugly or uselessly complicated to implement. If we do not support external patcher anymore, the debuginstall check is not useful anymore. - Remove patch.externalpatch() after 1.9 release.
author Patrick Mezard <pmezard@gmail.com>
date Thu, 24 Mar 2011 10:28:29 +0100
parents 7eb82f88e157
children 366e014a1ded
files doc/hgrc.5.txt mercurial/commands.py mercurial/patch.py tests/test-install.t
diffstat 4 files changed, 2 insertions(+), 46 deletions(-) [+]
line wrap: on
line diff
--- a/doc/hgrc.5.txt	Wed Mar 23 19:28:16 2011 -0500
+++ b/doc/hgrc.5.txt	Thu Mar 24 10:28:29 2011 +0100
@@ -911,9 +911,6 @@
     The conflict resolution program to use during a manual merge.
     For more information on merge tools see :hg:`help merge-tools`.
     For configuring merge tools see the merge-tools_ section.
-``patch``
-    command to use to apply patches. Look for ``gpatch`` or ``patch`` in
-    PATH if unset.
 ``quiet``
     Reduce the amount of output printed. True or False. Default is False.
 ``remotecmd``
--- a/mercurial/commands.py	Wed Mar 23 19:28:16 2011 -0500
+++ b/mercurial/commands.py	Thu Mar 24 10:28:29 2011 +0100
@@ -1559,45 +1559,6 @@
         ui.write(_(" (templates seem to have been installed incorrectly)\n"))
         problems += 1
 
-    # patch
-    ui.status(_("Checking patch...\n"))
-    patchproblems = 0
-    a = "1\n2\n3\n4\n"
-    b = "1\n2\n3\ninsert\n4\n"
-    fa = writetemp(a)
-    d = mdiff.unidiff(a, None, b, None, os.path.basename(fa),
-        os.path.basename(fa))
-    fd = writetemp(d)
-
-    files = {}
-    try:
-        patch.patch(fd, ui, cwd=os.path.dirname(fa), files=files)
-    except util.Abort, e:
-        ui.write(_(" patch call failed:\n"))
-        ui.write(" " + str(e) + "\n")
-        patchproblems += 1
-    else:
-        if list(files) != [os.path.basename(fa)]:
-            ui.write(_(" unexpected patch output!\n"))
-            patchproblems += 1
-        a = open(fa).read()
-        if a != b:
-            ui.write(_(" patch test failed!\n"))
-            patchproblems += 1
-
-    if patchproblems:
-        if ui.config('ui', 'patch'):
-            ui.write(_(" (Current patch tool may be incompatible with patch,"
-                       " or misconfigured. Please check your configuration"
-                       " file)\n"))
-        else:
-            ui.write(_(" Internal patcher failure, please report this error"
-                       " to http://mercurial.selenic.com/wiki/BugTracker\n"))
-    problems += patchproblems
-
-    os.unlink(fa)
-    os.unlink(fd)
-
     # editor
     ui.status(_("Checking commit editor...\n"))
     editor = ui.geteditor()
--- a/mercurial/patch.py	Wed Mar 23 19:28:16 2011 -0500
+++ b/mercurial/patch.py	Thu Mar 24 10:28:29 2011 +0100
@@ -1156,7 +1156,7 @@
         return -1
     return err
 
-def externalpatch(patcher, patchname, ui, strip, cwd, files):
+def _externalpatch(patcher, patchname, ui, strip, cwd, files):
     """use <patcher> to apply <patchname> to the working directory.
     returns whether patch was applied with fuzz factor."""
 
@@ -1240,7 +1240,7 @@
         files = {}
     try:
         if patcher:
-            return externalpatch(patcher, patchname, ui, strip, cwd, files)
+            return _externalpatch(patcher, patchname, ui, strip, cwd, files)
         return internalpatch(patchname, ui, strip, cwd, files, eolmode)
     except PatchError, err:
         raise util.Abort(str(err))
--- a/tests/test-install.t	Wed Mar 23 19:28:16 2011 -0500
+++ b/tests/test-install.t	Thu Mar 24 10:28:29 2011 +0100
@@ -3,7 +3,6 @@
   Checking encoding (ascii)...
   Checking installed modules (*/mercurial)... (glob)
   Checking templates...
-  Checking patch...
   Checking commit editor...
   Checking username...
   No problems detected
@@ -13,7 +12,6 @@
   Checking encoding (ascii)...
   Checking installed modules (*/mercurial)... (glob)
   Checking templates...
-  Checking patch...
   Checking commit editor...
   Checking username...
    no username supplied (see "hg help config")