tests-subrepo-git: emit a different "pwned" message based on the test
Having a single "pwned" message which may or may not be emitted during the
tests for CVE-2016-3068 leads to extra confusion. Allow each test to emit
a more detailed message based on what the expectations are.
In both cases, we expect a version of git which has had the vulnerability
plugged, as well as a version of mercurial which also knows about
GIT_ALLOW_PROTOCOL. For the first test, we make sure GIT_ALLOW_PROTOCOL is
unset, meaning that the ext-protocol subrepo should be ignored; if it
isn't, there's either a problem with mercurial or the installed copy of
git.
For the second test, we explicitly allow ext-protocol subrepos, which means
that the subrepo will be accessed and a message emitted confirming that
this was, in fact, our intention.
Mercurial allows you to customize output of commands through
templates. You can either pass in a template or select an existing
template-style from the command line, via the --template option.
You can customize output for any "log-like" command: log,
outgoing, incoming, tip, parents, and heads.
Some built-in styles are packaged with Mercurial. These can be listed
with :hg:`log --template list`. Example usage::
$ hg log -r1.0::1.1 --template changelog
A template is a piece of text, with markup to invoke variable
expansion::
$ hg log -r1 --template "{node}\n"
b56ce7b07c52de7d5fd79fb89701ea538af65746
Strings in curly braces are called keywords. The availability of
keywords depends on the exact context of the templater. These
keywords are usually available for templating a log-like command:
.. keywordsmarker
The "date" keyword does not produce human-readable output. If you
want to use a date in your output, you can use a filter to process
it. Filters are functions which return a string based on the input
variable. Be sure to use the stringify filter first when you're
applying a string-input filter to a list-like input variable.
You can also use a chain of filters to get the desired output::
$ hg tip --template "{date|isodate}\n"
2008-08-21 18:22 +0000
List of filters:
.. filtersmarker
Note that a filter is nothing more than a function call, i.e.
``expr|filter`` is equivalent to ``filter(expr)``.
In addition to filters, there are some basic built-in functions:
.. functionsmarker
Also, for any expression that returns a list, there is a list operator::
expr % "{template}"
As seen in the above example, ``{template}`` is interpreted as a template.
To prevent it from being interpreted, you can use an escape character ``\{``
or a raw string prefix, ``r'...'``.
New keywords and functions can be defined in the ``templatealias`` section of
a Mercurial configuration file::
<alias> = <definition>
Arguments of the form `a1`, `a2`, etc. are substituted from the alias into
the definition.
For example,
::
[templatealias]
r = rev
rn = "{r}:{node|short}"
leftpad(s, w) = pad(s, w, ' ', True)
defines two symbol aliases, ``r`` and ``rn``, and a function alias
``leftpad()``.
Some sample command line templates:
- Format lists, e.g. files::
$ hg log -r 0 --template "files:\n{files % ' {file}\n'}"
- Join the list of files with a ", "::
$ hg log -r 0 --template "files: {join(files, ', ')}\n"
- Modify each line of a commit description::
$ hg log --template "{splitlines(desc) % '**** {line}\n'}"
- Format date::
$ hg log -r 0 --template "{date(date, '%Y')}\n"
- Display date in UTC::
$ hg log -r 0 --template "{localdate(date, 'UTC')|date}\n"
- Output the description set to a fill-width of 30::
$ hg log -r 0 --template "{fill(desc, 30)}"
- Use a conditional to test for the default branch::
$ hg log -r 0 --template "{ifeq(branch, 'default', 'on the main branch',
'on branch {branch}')}\n"
- Append a newline if not empty::
$ hg tip --template "{if(author, '{author}\n')}"
- Label the output for use with the color extension::
$ hg log -r 0 --template "{label('changeset.{phase}', node|short)}\n"
- Invert the firstline filter, i.e. everything but the first line::
$ hg log -r 0 --template "{sub(r'^.*\n?\n?', '', desc)}\n"
- Display the contents of the 'extra' field, one per line::
$ hg log -r 0 --template "{join(extras, '\n')}\n"
- Mark the active bookmark with '*'::
$ hg log --template "{bookmarks % '{bookmark}{ifeq(bookmark, active, '*')} '}\n"
- Find the previous release candidate tag, the distance and changes since the tag::
$ hg log -r . --template "{latesttag('re:^.*-rc$') % '{tag}, {changes}, {distance}'}\n"
- Mark the working copy parent with '@'::
$ hg log --template "{ifcontains(rev, revset('.'), '@')}\n"
- Show details of parent revisions::
$ hg log --template "{revset('parents(%d)', rev) % '{desc|firstline}\n'}"
- Show only commit descriptions that start with "template"::
$ hg log --template "{startswith('template', firstline(desc))}\n"
- Print the first word of each line of a commit message::
$ hg log --template "{word(0, desc)}\n"