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Mercurial allows you to customize output of commands through templates. You can either pass in a template from the command line, via the --template option, or select an existing template-style (--style). You can customize output for any "log-like" command: log, outgoing, incoming, tip, parents, heads and glog. Four styles are packaged with Mercurial: default (the style used when no explicit preference is passed), compact, changelog, and xml. Usage:: $ hg log -r1 --style 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: - date(date[, fmt]) - fill(text[, width]) - get(dict, key) - if(expr, then[, else]) - ifeq(expr, expr, then[, else]) - join(list, sep) - label(label, expr) - sub(pat, repl, expr) - rstdoc(text, style) Also, for any expression that returns a list, there is a list operator: - expr % "{template}" 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" - Format date:: $ hg log -r 0 --template "{date(date, '%Y')}\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"