patch: add config knob for displaying the index header
This config knob can take an integer between 0 and 40 or a
keyword ('none', 'short', 'full') to control the length of hash to
output. It will display diffs with the git index header as such,
diff --git a/mercurial/mdiff.py b/mercurial/mdiff.py
index 112edf7..d6b52c5 100644
We'll put this in the experimental section for now.
--- a/mercurial/mdiff.py Thu Jan 12 12:05:23 2017 -0800
+++ b/mercurial/mdiff.py Mon Jan 09 11:13:47 2017 -0800
@@ -52,6 +52,7 @@
'nodates': False,
'nobinary': False,
'noprefix': False,
+ 'index': 0,
'ignorews': False,
'ignorewsamount': False,
'ignoreblanklines': False,
--- a/mercurial/patch.py Thu Jan 12 12:05:23 2017 -0800
+++ b/mercurial/patch.py Mon Jan 09 11:13:47 2017 -0800
@@ -2168,6 +2168,31 @@
if git:
buildopts['git'] = get('git')
+
+ # need to inspect the ui object instead of using get() since we want to
+ # test for an int
+ hconf = ui.config('experimental', 'extendedheader.index')
+ if hconf is not None:
+ hlen = None
+ try:
+ # the hash config could be an integer (for length of hash) or a
+ # word (e.g. short, full, none)
+ hlen = int(hconf)
+ except ValueError:
+ # default value
+ if hconf == 'short' or hconf == '':
+ hlen = 12
+ elif hconf == 'full':
+ hlen = 40
+ elif hconf != 'none':
+ msg = _("invalid value for extendedheader.index: '%s'\n")
+ ui.warn(msg % hconf)
+ finally:
+ if hlen < 0 or hlen > 40:
+ msg = _("invalid length for extendedheader.index: '%d'\n")
+ ui.warn(msg % hlen)
+ buildopts['index'] = hlen
+
if whitespace:
buildopts['ignorews'] = get('ignore_all_space', 'ignorews')
buildopts['ignorewsamount'] = get('ignore_space_change',