[PATCH 5 of 6] cmdutil: extract latest tags closures in templatekw

[Patrick Mézard]

Le 30/11/2009 23:34, Patrick Mezard a écrit :
> # HG changeset patch
> # User Patrick Mezard <pmezard at gmail.com>
> # Date 1259616498 -3600
> # Node ID c892c6cc06cbdab1354e0af2312d74eb7061ab52
> # Parent  9651033b608af8b664eba0962a0fc943235f373b
> cmdutil: extract latest tags closures in templatekw

[...]

> diff --git a/mercurial/templatekw.py b/mercurial/templatekw.py
> --- a/mercurial/templatekw.py
> +++ b/mercurial/templatekw.py
> @@ -75,6 +75,39 @@
>                                       ctx.node())[:3]
>      return cache['files']
>  
> +def getlatesttags(repo, ctx, cache):
> +    '''return date, distance and name for the latest tag of rev'''
> +
> +    if 'latesttags' not in cache:
> +        # Cache mapping from rev to a tuple with tag date, tag
> +        # distance and tag name
> +        cache['latesttags'] = {-1: (0, 0, 'null')}
> +    latesttags = cache['latesttags']

This one is buggy, "cache" is reset on every new changeset while we want the latesttags cache to live through the whole display run. I will probably introduce another "revcache" object. I hope this won't make the template map too messy.

> +    rev = ctx.rev()
> +    todo = [rev]
> +    while todo:
> +        rev = todo.pop()
> +        if rev in latesttags:
> +            continue
> +        ctx = repo[rev]
> +        tags = [t for t in ctx.tags() if repo.tagtype(t) == 'global']
> +        if tags:
> +            latesttags[rev] = ctx.date()[0], 0, ':'.join(sorted(tags))
> +            continue
> +        try:
> +            # The tuples are laid out so the right one can be found by
> +            # comparison.
> +            pdate, pdist, ptag = max(
> +                latesttags[p.rev()] for p in ctx.parents())
> +        except KeyError:
> +            # Cache miss - recurse
> +            todo.append(rev)
> +            todo.extend(p.rev() for p in ctx.parents())
> +            continue
> +        latesttags[rev] = pdate, pdist + 1, ptag
> +    return latesttags[rev]
> +
>  def showauthor(repo, ctx, templ, **args):
>      return ctx.user()

--
Patrick Mézard