tests/test-impexp-branch.t

url: be stricter about detecting schemes

While the URL parser is very forgiving about what characters are
allowed in each component, it's useful to be strict about the scheme
so we don't accidentally interpret local paths with colons as URLs.

This restricts schemes to containing alphanumeric characters, dashes,
pluses, and dots (as specified in RFC 2396).

  $ cat >findbranch.py <<EOF
  > import re, sys
  > 
  > head_re = re.compile('^#(?:(?:\\s+([A-Za-z][A-Za-z0-9_]*)(?:\\s.*)?)|(?:\\s*))$')
  > 
  > for line in sys.stdin:
  >     hmatch = head_re.match(line)
  >     if not hmatch:
  >         sys.exit(1)
  >     if hmatch.group(1) == 'Branch':
  >         sys.exit(0)
  > sys.exit(1)
  > EOF
  $ hg init a
  $ cd a
  $ echo "Rev 1" >rev
  $ hg add rev
  $ hg commit -m "No branch."
  $ hg branch abranch
  marked working directory as branch abranch
  $ echo "Rev  2" >rev
  $ hg commit -m "With branch."
  $ if hg export 0 | python ../findbranch.py; then
  >     echo "Export of default branch revision has Branch header" 1>&2
  >     exit 1
  > fi
  $ if hg export 1 | python ../findbranch.py; then
  >     :  # Do nothing
  > else
  >     echo "Export of branch revision is missing Branch header" 1>&2
  >     exit 1
  > fi

Make sure import still works with branch information in patches.

  $ cd ..
  $ hg init b
  $ cd b
  $ hg -R ../a export 0 | hg import -
  applying patch from stdin
  $ hg -R ../a export 1 | hg import -
  applying patch from stdin
  $ cd ..
  $ rm -rf b
  $ hg init b
  $ cd b
  $ hg -R ../a export 0 | hg import --exact -
  applying patch from stdin
  $ hg -R ../a export 1 | hg import --exact -
  applying patch from stdin