subrepo: add argument to "diff()" to pass "ui" of caller side (issue3712) (API)
Color extension achieves colorization by overriding the class of
"ui" object just before command execution.
Before this patch, "diff()" of abstractsubrepo and classes
derived from it has no "ui" argument, so "diff()" of hgsubrepo
uses "self._repo.ui" to invoke "cmdutil.diffordiffstat()".
For separation of configuration between repositories, revision
573bec4ab7ba changed the initialization source of "self._repo.ui"
from "ui"(overridden) to "baseui"(plain) of parent repository.
And this caused break of colorization.
This patch adds "ui" argument to "diff()" of abstractsubrepo and
classes derived from it to pass "ui" object of caller side.
Environment setup for MQ
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ hg init
$ hg qinit
Should fail if no patches applied
$ hg qrefresh
no patches applied
[1]
$ hg qrefresh -e
no patches applied
[1]
$ hg qnew -m "First commit message" first-patch
$ echo aaaa > file
$ hg add file
$ hg qrefresh
Should display 'First commit message'
$ hg log -l1 --template "{desc}\n"
First commit message
Testing changing message with -m
$ echo bbbb > file
$ hg qrefresh -m "Second commit message"
Should display 'Second commit message'
$ hg log -l1 --template "{desc}\n"
Second commit message
Testing changing message with -l
$ echo "Third commit message" > logfile
$ echo " This is the 3rd log message" >> logfile
$ echo bbbb > file
$ hg qrefresh -l logfile
Should display 'Third commit message\\\n This is the 3rd log message'
$ hg log -l1 --template "{desc}\n"
Third commit message
This is the 3rd log message
Testing changing message with -l-
$ hg qnew -m "First commit message" second-patch
$ echo aaaa > file2
$ hg add file2
$ echo bbbb > file2
$ (echo "Fifth commit message"; echo " This is the 5th log message") | hg qrefresh -l-
Should display 'Fifth commit message\\\n This is the 5th log message'
$ hg log -l1 --template "{desc}\n"
Fifth commit message
This is the 5th log message