[PATCH on-crew] patch._applydiff: resolve prefix with respect to the cwd

[Augie Fackler]

On Thu, Mar 19, 2015 at 11:29:59AM -0700, Siddharth Agarwal wrote:
> # HG changeset patch
> # User Siddharth Agarwal <sid0 at fb.com>
> # Date 1426785485 25200
> #      Thu Mar 19 10:18:05 2015 -0700
> # Node ID 4decbedd708b2c3787a08415c7affe5265616aa2
> # Parent  7262bbef2ba80ce3ccfc726a19c0e33a419aff04
> patch._applydiff: resolve prefix with respect to the cwd

Queued.

>
> This has several advantages compared to resolving it relative to the root:
>
> - '--prefix .' works as expected.
> - consistent with upcoming 'hg diff' option to produce relative patches
>
> (I made sure to put in the (glob) annotations this time!)

check-code appreciates your consideration :)

>
> diff --git a/mercurial/commands.py b/mercurial/commands.py
> --- a/mercurial/commands.py
> +++ b/mercurial/commands.py
> @@ -4066,7 +4066,7 @@
>      ('', 'exact', None,
>       _('apply patch to the nodes from which it was generated')),
>      ('', 'prefix', '',
> -     _('apply patch to directory relative to the root'), _('DIR')),
> +     _('apply patch to subdirectory'), _('DIR')),
>      ('', 'import-branch', None,
>       _('use any branch information in patch (implied by --exact)'))] +
>      commitopts + commitopts2 + similarityopts,
> diff --git a/mercurial/patch.py b/mercurial/patch.py
> --- a/mercurial/patch.py
> +++ b/mercurial/patch.py
> @@ -17,6 +17,7 @@
>  from node import hex, short
>  import cStringIO
>  import base85, mdiff, scmutil, util, diffhelpers, copies, encoding, error
> +import pathutil
>
>  gitre = re.compile('diff --git a/(.*) b/(.*)')
>  tabsplitter = re.compile(r'(\t+|[^\t]+)')
> @@ -1795,8 +1796,10 @@
>                 eolmode='strict'):
>
>      if prefix:
> -        # clean up double slashes, lack of trailing slashes, etc
> -        prefix = util.normpath(prefix) + '/'
> +        prefix = pathutil.canonpath(backend.repo.root, backend.repo.getcwd(),
> +                                    prefix)
> +        if prefix != '':
> +            prefix += '/'
>      def pstrip(p):
>          return pathtransform(p, strip - 1, prefix)[1]
>
> diff --git a/tests/test-import-git.t b/tests/test-import-git.t
> --- a/tests/test-import-git.t
> +++ b/tests/test-import-git.t
> @@ -626,6 +626,33 @@
>    adding dir/d
>    adding dir/dir2/b
>    adding dir/dir2/c
> +
> +prefix '.' is the same as no prefix
> +  $ hg import --no-commit --prefix . - <<EOF
> +  > diff --git a/dir/a b/dir/a
> +  > --- /dev/null
> +  > +++ b/dir/a
> +  > @@ -0,0 +1 @@
> +  > +aaaa
> +  > diff --git a/dir/d b/dir/d
> +  > --- a/dir/d
> +  > +++ b/dir/d
> +  > @@ -1,1 +1,2 @@
> +  >  d
> +  > +dddd
> +  > EOF
> +  applying patch from stdin
> +  $ cat dir/a
> +  aaaa
> +  $ cat dir/d
> +  d
> +  dddd
> +  $ hg revert -aC
> +  forgetting dir/a (glob)
> +  reverting dir/d (glob)
> +  $ rm dir/a
> +
> +prefix with default strip
>    $ hg import --no-commit --prefix dir/ - <<EOF
>    > diff --git a/a b/a
>    > --- /dev/null
> @@ -649,10 +676,10 @@
>    forgetting dir/a
>    reverting dir/d
>    $ rm dir/a
> -(test that prefixes are relative to the root)
> +(test that prefixes are relative to the cwd)
>    $ mkdir tmpdir
>    $ cd tmpdir
> -  $ hg import --no-commit -p2 --prefix dir/ - <<EOF
> +  $ hg import --no-commit -p2 --prefix ../dir/ - <<EOF
>    > diff --git a/foo/a b/foo/a
>    > new file mode 100644
>    > --- /dev/null