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identify: add template support...
identify: add template support This is based on a patch proposed last year by Mathias De Maré[1], with a few changes. - Tags and bookmarks are now formatted lists, for more flexible queries. - The templater is populated whether or not [-nibtB] is specified. (Plain output is unchanged.) This seems more consistent with other templated commands. - The 'id' property is a string, instead of a list. - The parents of 'wdir()' have their own list of attributes. I left 'id' as a string because it seems very useful for generating version info. It's also a bit strange because the value and meaning changes depending on whether or not --debug is passed (short vs full hash), whether the revision is a merge or not (one hash or two, separated by a '+'), the working directory or not (node vs p1node), and local or not (remote defaults to tip, and never has '+'). The equivalent string built with {rev} seems much less useful, and I couldn't think of a reasonable name, so I left it out. The discussion seemed to be pointing towards having a list of nodes, with more than one entry for a merge. It seems simpler to give the nodes a name, and use {node} for the actual commit probed, especially now that there is a virtual node for 'wdir()'. Yuya mentioned using fm.nested() in that thread, so I did for the parent nodes. I'm not sure if the plan is to fill in all of the context attributes in these items, or if these nested items should simply be made {p1node} and {p1rev}. I used ':' as the tag separator for consistency with {tags} in the log templater. Likewise, bookmarks are separated by a space for consistency with the corresponding log template. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2016-August/087039.html
Augie Fackler - - Load All Authors

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test-pager.t
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$ cat >> fakepager.py <<EOF
> import sys
> printed = False
> for line in sys.stdin:
> sys.stdout.write('paged! %r\n' % line)
> printed = True
> if not printed:
> sys.stdout.write('paged empty output!\n')
> EOF
Enable ui.formatted because pager won't fire without it, and set up
pager and tell it to use our fake pager that lets us see when the
pager was running.
$ cat >> $HGRCPATH <<EOF
> [ui]
> formatted = yes
> color = no
> [pager]
> pager = $PYTHON $TESTTMP/fakepager.py
> EOF
$ hg init repo
$ cd repo
$ echo a >> a
$ hg add a
$ hg ci -m 'add a'
$ for x in `$PYTHON $TESTDIR/seq.py 1 10`; do
> echo a $x >> a
> hg ci -m "modify a $x"
> done
By default diff and log are paged, but id is not:
$ hg diff -c 2 --pager=yes
paged! 'diff -r f4be7687d414 -r bce265549556 a\n'
paged! '--- a/a\tThu Jan 01 00:00:00 1970 +0000\n'
paged! '+++ b/a\tThu Jan 01 00:00:00 1970 +0000\n'
paged! '@@ -1,2 +1,3 @@\n'
paged! ' a\n'
paged! ' a 1\n'
paged! '+a 2\n'
$ hg log --limit 2
paged! 'changeset: 10:46106edeeb38\n'
paged! 'tag: tip\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 10\n'
paged! '\n'
paged! 'changeset: 9:6dd8ea7dd621\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 9\n'
paged! '\n'
$ hg id
46106edeeb38 tip
We can control the pager from the config
$ hg log --limit 1 --config 'ui.paginate=False'
changeset: 10:46106edeeb38
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify a 10
$ hg log --limit 1 --config 'ui.paginate=0'
changeset: 10:46106edeeb38
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify a 10
$ hg log --limit 1 --config 'ui.paginate=1'
paged! 'changeset: 10:46106edeeb38\n'
paged! 'tag: tip\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 10\n'
paged! '\n'
We can enable the pager on id:
BROKEN: should be paged
$ hg --config pager.attend-id=yes id
46106edeeb38 tip
Setting attend-$COMMAND to a false value works, even with pager in
core:
$ hg --config pager.attend-diff=no diff -c 2
diff -r f4be7687d414 -r bce265549556 a
--- a/a Thu Jan 01 00:00:00 1970 +0000
+++ b/a Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +1,3 @@
a
a 1
+a 2
Command aliases should have same behavior as main command
$ hg history --limit 2
paged! 'changeset: 10:46106edeeb38\n'
paged! 'tag: tip\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 10\n'
paged! '\n'
paged! 'changeset: 9:6dd8ea7dd621\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 9\n'
paged! '\n'
Abbreviated command alias should also be paged
$ hg hist -l 1
paged! 'changeset: 10:46106edeeb38\n'
paged! 'tag: tip\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 10\n'
paged! '\n'
Attend for an abbreviated command does not work
$ hg --config pager.attend-ident=true ident
46106edeeb38 tip
$ hg --config extensions.pager= --config pager.attend-ident=true ident
46106edeeb38 tip
Pager should not start if stdout is not a tty.
$ hg log -l1 -q --config ui.formatted=False
10:46106edeeb38
Pager should be disabled if pager.pager is empty (otherwise the output would
be silently lost.)
$ hg log -l1 -q --config pager.pager=
10:46106edeeb38
Pager with color enabled allows colors to come through by default,
even though stdout is no longer a tty.
$ cat >> $HGRCPATH <<EOF
> [ui]
> color = always
> [color]
> mode = ansi
> EOF
$ hg log --limit 3
paged! '\x1b[0;33mchangeset: 10:46106edeeb38\x1b[0m\n'
paged! 'tag: tip\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 10\n'
paged! '\n'
paged! '\x1b[0;33mchangeset: 9:6dd8ea7dd621\x1b[0m\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 9\n'
paged! '\n'
paged! '\x1b[0;33mchangeset: 8:cff05a6312fe\x1b[0m\n'
paged! 'user: test\n'
paged! 'date: Thu Jan 01 00:00:00 1970 +0000\n'
paged! 'summary: modify a 8\n'
paged! '\n'
An invalid pager command name is reported sensibly if we don't have to
use shell=True in the subprocess call:
$ hg log --limit 3 --config pager.pager=this-command-better-never-exist
missing pager command 'this-command-better-never-exist', skipping pager
\x1b[0;33mchangeset: 10:46106edeeb38\x1b[0m (esc)
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify a 10
\x1b[0;33mchangeset: 9:6dd8ea7dd621\x1b[0m (esc)
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify a 9
\x1b[0;33mchangeset: 8:cff05a6312fe\x1b[0m (esc)
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: modify a 8
A complicated pager command gets worse behavior. Bonus points if you can
improve this.
$ hg log --limit 3 \
> --config pager.pager='this-command-better-never-exist --seriously' \
> 2>/dev/null || true
Pager works with shell aliases.
$ cat >> $HGRCPATH <<EOF
> [alias]
> echoa = !echo a
> EOF
$ hg echoa
a
BROKEN: should be paged
$ hg --config pager.attend-echoa=yes echoa
a
Pager works with hg aliases including environment variables.
$ cat >> $HGRCPATH <<'EOF'
> [alias]
> printa = log -T "$A\n" -r 0
> EOF
$ A=1 hg --config pager.attend-printa=yes printa
paged! '1\n'
$ A=2 hg --config pager.attend-printa=yes printa
paged! '2\n'
Something that's explicitly attended is still not paginated if the
pager is globally set to off using a flag:
$ A=2 hg --config pager.attend-printa=yes printa --pager=no
2
Pager should not override the exit code of other commands
$ cat >> $TESTTMP/fortytwo.py <<'EOF'
> from mercurial import commands, registrar
> cmdtable = {}
> command = registrar.command(cmdtable)
> @command('fortytwo', [], 'fortytwo', norepo=True)
> def fortytwo(ui, *opts):
> ui.write('42\n')
> return 42
> EOF
$ cat >> $HGRCPATH <<'EOF'
> [extensions]
> fortytwo = $TESTTMP/fortytwo.py
> EOF
$ hg fortytwo --pager=on
paged! '42\n'
[42]
A command that asks for paging using ui.pager() directly works:
$ hg blame a
paged! ' 0: a\n'
paged! ' 1: a 1\n'
paged! ' 2: a 2\n'
paged! ' 3: a 3\n'
paged! ' 4: a 4\n'
paged! ' 5: a 5\n'
paged! ' 6: a 6\n'
paged! ' 7: a 7\n'
paged! ' 8: a 8\n'
paged! ' 9: a 9\n'
paged! '10: a 10\n'
but not with HGPLAIN
$ HGPLAIN=1 hg blame a
0: a
1: a 1
2: a 2
3: a 3
4: a 4
5: a 5
6: a 6
7: a 7
8: a 8
9: a 9
10: a 10
explicit flags work too:
$ hg blame --pager=no a
0: a
1: a 1
2: a 2
3: a 3
4: a 4
5: a 5
6: a 6
7: a 7
8: a 8
9: a 9
10: a 10
A command with --output option:
$ hg cat -r0 a
paged! 'a\n'
$ hg cat -r0 a --output=-
paged! 'a\n'
$ hg cat -r0 a --output=out
$ rm out
Put annotate in the ignore list for pager:
$ cat >> $HGRCPATH <<EOF
> [pager]
> ignore = annotate
> EOF
$ hg blame a
0: a
1: a 1
2: a 2
3: a 3
4: a 4
5: a 5
6: a 6
7: a 7
8: a 8
9: a 9
10: a 10
Environment variables like LESS and LV are set automatically:
$ cat > $TESTTMP/printlesslv.py <<EOF
> import os, sys
> sys.stdin.read()
> for name in ['LESS', 'LV']:
> sys.stdout.write(('%s=%s\n') % (name, os.environ.get(name, '-')))
> sys.stdout.flush()
> EOF
$ cat >> $HGRCPATH <<EOF
> [alias]
> noop = log -r 0 -T ''
> [ui]
> formatted=1
> [pager]
> pager = $PYTHON $TESTTMP/printlesslv.py
> EOF
$ unset LESS
$ unset LV
$ hg noop --pager=on
LESS=FRX
LV=-c
$ LESS=EFGH hg noop --pager=on
LESS=EFGH
LV=-c