tests/test-symlink-basic

cmdutil: changeset_printer: use methods of filectx/changectx.

This allows extensions that modify changeset metadata (e.g.
description) by overriding methods of changectx to get consistent
behavior from all log-like commands, regardless of whether templates
or styles are used. Without this, overriding changectx methods works
if you use styles or templates, but not with default log format.

This meant adding filectx.extra() for consistency with changectx.

#!/bin/sh

"$TESTDIR/hghave" symlink || exit 80

hg init a
cd a
ln -s nothing dangling
hg commit -m 'commit symlink without adding' dangling
hg add dangling
hg commit -m 'add symlink'

hg tip -v
hg manifest --debug
echo '% rev 0:'
$TESTDIR/readlink.py dangling

rm dangling
ln -s void dangling
hg commit -m 'change symlink'
echo '% rev 1:'
$TESTDIR/readlink.py dangling

echo '% modifying link'
rm dangling
ln -s empty dangling
$TESTDIR/readlink.py dangling

echo '% reverting to rev 0:'
hg revert -r 0 -a
$TESTDIR/readlink.py dangling

echo '% backups:'
$TESTDIR/readlink.py *.orig

rm *.orig
hg up -C
echo '% copies'
hg cp -v dangling dangling2
hg st -Cmard
$TESTDIR/readlink.py dangling dangling2

echo '% issue995'
hg up -C
mkdir dir
ln -s dir dirlink
hg ci -qAm 'add dirlink'
mkdir newdir
mv dir newdir/dir
mv dirlink newdir/dirlink
hg mv -A dirlink newdir/dirlink