view tests/test-1102.t @ 27513:707cdf2c3700 stable

mq: use fallback patch name if no alpha-numeric in summary line (issue5025)

Before this patch, "hg qimport -r REV" fails, if the summary line of
description of REV doesn't contain any alpha-numeric bytes.

In this case, all bytes in the summary line 'title' are dropped from
'namebase' by the code path below.

     namebase = re.sub('[\s\W_]+', '_', title.lower()).strip('_')

'makepatchname()' immediately returns this empty string as valid patch
name, because patch name conflicting against empty string never
exists.

Then, "hg qimport -r REV" is aborted at creation of patch file with
empty filename.

This situation isn't so rare. For example, ordinary texts in Japanese
often consist of non alpha-numeric bytes in UTF-8.

This patch makes 'makepatchname()' use fallback patch name if the
summary line of imported revision doesn't contain any alpha-numeric
bytes.

  $ rm -rf a
  $ hg init a
  $ cd a
  $ echo a > a
  $ hg ci -Am0
  adding a
  $ hg tag t1 # 1
  $ hg tag --remove t1 # 2

  $ hg co 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg tag -f -r0 t1
  $ hg tags
  tip                                3:a49829c4fc11
  t1                                 0:f7b1eb17ad24

  $ cd ..