Antoine Pelisse <apelisse@xxxxxxxxx> writes:
> git-fast-import documentation says that paths can be C-style quoted.
> Unfortunately, the current remote-hg helper doesn't unquote quoted
> path and pass them as-is to Mercurial when the commit is created.
>
> This result in the following situation:
>
> - clone a mercurial repository with git
> - Add a file with space: `mkdir dir/foo\ bar`
> - Commit that new file, and push the change to mercurial
> - The mercurial repository as now a new directory named '"dir', which
> contains a file named 'foo bar"'
>
> Use python ast.literal_eval to unquote the string if it starts with ".
> It has been tested with quotes, spaces, and utf-8 encoded file-names.
>
> Signed-off-by: Antoine Pelisse <apelisse@xxxxxxxxx>
> ---
A path you read in fast-import input indeed needs to be unquoted
when it begins with a dq, and I _think_ by using ast.literal_eval(),
you probably can correctly unquote any valid C-quoted string.
But it bothers me somewhat that what the patch does seems to be
overly broad. Doesn't ast.literal_eval() take a lot more than just
strings?
ast.literal_eval(node_or_string)
Safely evaluate an expression node or a Unicode or Latin-1
encoded string containing a Python expression. The string or
node provided may only consist of the following Python literal
structures: strings, numbers, tuples, lists, dicts, booleans,
and None.
Also doesn't Python's double-quoted string have a lot more magic
than C-quoted string, e.g.
$ python -i
>>> import ast
>>> not_cq_path = '"abc" "def"'
>>> ast.literal_eval(not_cq_path)
'abcdef'
> contrib/remote-helpers/git-remote-hg | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/contrib/remote-helpers/git-remote-hg b/contrib/remote-helpers/git-remote-hg
> index 92d994e..0141949 100755
> --- a/contrib/remote-helpers/git-remote-hg
> +++ b/contrib/remote-helpers/git-remote-hg
> @@ -14,6 +14,7 @@
>
> from mercurial import hg, ui, bookmarks, context, encoding, node, error, extensions, discovery, util
>
> +import ast
> import re
> import sys
> import os
> @@ -742,6 +743,8 @@ def parse_commit(parser):
> f = { 'deleted' : True }
> else:
> die('Unknown file command: %s' % line)
> + if path.startswith('"'):
> + path = ast.literal_eval(path)
> files[path] = f
>
> # only export the commits if we are on an internal proxy repo
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