convert: handle percent-encoded bytes in file URLs like Subversion 75b59d221aa3 added most of the code that gets removed by this patch. It helped making progress on Python 3, but the reasoning was wrong in many ways. I tried to retract it while it was queued, but it was too late. Back then, I was asssuming that what happened on Python 2 (preserving bytes) is correct and my Python 3 change is a hack. However it turned out that Subversion interprets percent-encoded bytes as UTF-8. Accepting the same format as Subversion is a good idea. Consistency with urlreq.pathname2url() (as described in the removed comment) doesn’t matter because that function is only used for passing paths to urllib. This is not a backwards-incompatible change because before 5c0d5b48e58c, non-ASCII filenames didn’t work at all on Python 2. When the locale encoding is ISO-8859-15, `svn` accepts `file:///tmp/a%E2%82%AC` for `/tmp/a€`. Before this patch, this was the case for this extension on Python 3, but not on Python 2. This patch makes it work like with `svn` on both Python 2 and Python 3.

convert: add docstring on convert.subversion.geturl() The function is unusual for a bytes-handling function in Mercurial because it can’t handle arbitrary bytes. Therefore we should document this fact. Pointed out by Yuya Nishihara while reviewing e3b19004087a.

ui: add option to timestamp status and diagnostic messages Differential Revision: https://phab.mercurial-scm.org/D8640

tests: use path inside test dir This will make the diff for the next patch less noisy.

convert: convert URLs to UTF-8 for Subversion Preamble: for comprehension, note that the `path` of geturl() would better be called `path_or_url` (the argument of the call of getsvn() is called `url`). For HTTP(S) URLs, the changes don’t make a difference, as they are restricted to ASCII. For file URLs, the reasoning is the same as for paths: we have to roundtrip with what Subversion is doing. When the locale encoding is ISO-8859-15, trying to convert a SVN repo `file:///tmp/a€` failed before like this: file:///tmp/a%A4 does not look like a Subversion repository to libsvn version 1.14.0 Decoding the path using the locale encoding can fail. In this case, we have to bail out, as Subversion won’t be able to do anything useful with the path.

convert: correctly convert paths to UTF-8 for Subversion The previous code using encoding.tolocal() only worked by chance in these situations: * The string is ASCII: The fast path was triggered and the string was returned unmodified. * The local encoding is UTF-8: The source and target encoding is the same. * The string is not valid UTF-8 and the native encoding is ISO-8859-1: If the string doesn’t decode using UTF-8, ISO-8859-1 is tried as a fallback. During `hg convert`, the local encoding is always UTF-8. The irony is that in this case, encoding.tolocal() behaves like what someone would expect the reverse function, encoding.fromlocal(), to do. When the locale encoding is ISO-8859-15, trying to convert a SVN repo `/tmp/a€` failed before like this: file:///tmp/a%C2%A4 does not look like a Subversion repository to libsvn version 1.14.0 The correct URL is `file:///tmp/a%E2%82%AC`. Unlike previously (with the ISO-8859-1 fallback), decoding the path using the locale encoding can fail. In this case, we have to bail out, as Subversion won’t be able to do anything useful with the path.

py3: pass URL as str Before the patch, HTTP(S) URLs were never recognized as a Subversion repository on Python 3.

convert: bail out in Subversion source if encountering non-ASCII HTTP(S) URL Before this patch, in the tested case, urllib raised `httplib.InvalidURL: URL can't contain control characters. '/\xff/!svn/ver/0/.svn' (found at least '\xff')`, which resulted in that the URL was never recognized as a Subversion repository. This patch adds a check that bails out if the URL contains non-ASCII characters. The warning is not overly user-friendly, but giving the user something to type into a search engine is definitively better than not explaining why the repository was not recognized. We could support non-ASCII chracters by quoting them before passing them to urllib. However, we would want to be compatible with what the `svn` command does, which converts the URL from the locale encoding to UTF-8, percent-encodes it and sends it to the server. If the locale encoding is not UTF-8, the behavior is IMHO not very intuitive, as the `svn` command may send different (percent-encoded) octets than what was passed on the console. Instead of copying this behavior, we better leave it forbidden.