diff tests/test-convert-svn-encoding.t @ 45027:0ea9c86fac89 stable 5.4.2

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.

--- a/tests/test-convert-svn-encoding.t	Tue Jun 30 16:39:45 2020 +0200
+++ b/tests/test-convert-svn-encoding.t	Tue Jun 30 07:23:29 2020 +0200
@@ -197,13 +197,13 @@
   abort: file:/*/$TESTTMP/\xff: missing or unsupported repository (glob) (esc)
   [255]
 
-#if py3
-For now, on Python 3, we abort when encountering non-UTF-8 percent-encoded
-bytes in a filename.
+Subversion decodes percent-encoded bytes on the converted, UTF-8-encoded
+string. Therefore, if the percent-encoded bytes aren't valid UTF-8, Subversion
+would choke on them when converting them to the locale encoding.
 
   $ hg convert file://$TESTTMP/%FF test
   initializing destination test repository
-  on Python 3, we currently do not support non-UTF-8 percent-encoded bytes in file URLs for Subversion repositories
+  Subversion does not support non-UTF-8 percent-encoded bytes in file URLs
   file:/*/$TESTTMP/%FF does not look like a CVS checkout (glob)
   $TESTTMP/file:$TESTTMP/%FF does not look like a Git repository
   file:/*/$TESTTMP/%FF does not look like a Subversion repository (glob)
@@ -215,4 +215,3 @@
   file:/*/$TESTTMP/%FF does not look like a P4 repository (glob)
   abort: file:/*/$TESTTMP/%FF: missing or unsupported repository (glob)
   [255]
-#endif