comparison mercurial/formatter.py @ 45320:4aa484efc926

templater: add exception-raising version of open_template()

I'm about to add another caller of `open_template()` (in the template
loader). That caller will want to get exceptions instead of `(None,
None)` if the template doesn't exist. This patch therefore changes
`open_template()` to raise exceptions and adds a new
`try_open_template()` that returns the `(None, None)` value.

Differential Revision: https://phab.mercurial-scm.org/D8905

45319:6e6fe826ba69

        templater.parseexpr(tmpl)  # make sure syntax errors are confined
        return reference_templatespec(func, refargs=ftail[:-1])

    # perhaps a stock style?
    if not os.path.split(tmpl)[0]:
        (mapname, fp) = templater.open_template(
            b'map-cmdline.' + tmpl
        ) or templater.open_template(tmpl)
        if mapname:
            return mapfile_templatespec(topic, mapname, fp)

    # perhaps it's a reference to [templates]
    if ui.config(b'templates', tmpl):

45320:4aa484efc926

        templater.parseexpr(tmpl)  # make sure syntax errors are confined
        return reference_templatespec(func, refargs=ftail[:-1])

    # perhaps a stock style?
    if not os.path.split(tmpl)[0]:
        (mapname, fp) = templater.try_open_template(
            b'map-cmdline.' + tmpl
        ) or templater.try_open_template(tmpl)
        if mapname:
            return mapfile_templatespec(topic, mapname, fp)

    # perhaps it's a reference to [templates]
    if ui.config(b'templates', tmpl):