[PATCH 1 of 4] archive: add branch and tag informations to the .hg_archival.txt file

[Gilles Moris]

 mercurial/archival.py  |  25 ++++++++++++++++++++++---
 tests/test-archive     |   8 ++++++++
 tests/test-archive.out |  11 +++++++++++
 3 files changed, 41 insertions(+), 3 deletions(-)


# HG changeset patch
# User Gilles Moris <gilles.moris at free.fr>
# Date 1249974242 -7200
# Node ID 886ffe57527e8ebc68b896061385eb36ce14d5bc
# Parent  7d429eedeb0d72c9e363aa9d799501299f50f72c
archive: add branch and tag informations to the .hg_archival.txt file

Up to this changeset, only the repo (first node) and current node hash where
printed. This adds also the named branch and tags.
Tags could be local or global tags. If multiple tags exist on this changeset,
they will be displayed one by line.
If the changeset has no tag, the latest tag in history (most recent tag in
ancestors) will be displayed instead, along to the longest distance to it.

diff --git a/mercurial/archival.py b/mercurial/archival.py
--- a/mercurial/archival.py
+++ b/mercurial/archival.py
@@ -7,6 +7,7 @@
 
 from i18n import _
 from node import hex
+import cmdutil
 import util
 import cStringIO, os, stat, tarfile, time, zipfile
 import zlib, gzip
@@ -217,9 +218,27 @@
     archiver = archivers[kind](dest, prefix, mtime or ctx.date()[0])
 
     if repo.ui.configbool("ui", "archivemeta", True):
-        write('.hg_archival.txt', 0644, False,
-              lambda: 'repo: %s\nnode: %s\n' % (
-                  hex(repo.changelog.node(0)), hex(node)))
+        def metadata():
+            content = 'repo: %s\nnode: %s\n' % (
+                hex(repo.changelog.node(0)), hex(node))
+
+            content += 'branch: %s\n' % ctx.branch()
+            tags = ''.join(['%stag: %s\n' % (repo.tagtype(t) != 'global' and
+                                             repo.tagtype(t) or '', t)
+                            for t in ctx.tags() if repo.tagtype(t)])
+            if tags:
+               return content + tags
+
+            opts = { 'template': '{latesttag}:{latesttagdistance}',
+                     'style': '', 'patch': None, 'git': None }
+            repo.ui.pushbuffer()
+            cmdutil.show_changeset(repo.ui, repo, opts).show(ctx)
+            ltinfo = repo.ui.popbuffer().split(':')
+            return content + 'latesttag: %s\nlatesttagdistance: %s\n' % \
+                   (ltinfo[0], ltinfo[-1])
+
+        write('.hg_archival.txt', 0644, False, metadata)
+
     for f in ctx:
         ff = ctx.flags(f)
         write(f, 'x' in ff and 0755 or 0644, 'l' in ff, ctx[f].data)
diff --git a/tests/test-archive b/tests/test-archive
--- a/tests/test-archive
+++ b/tests/test-archive
@@ -108,6 +108,14 @@
     echo 'rev-0.tar created'
 fi
 
+echo '% test .hg_archival.txt'
+hg archive ../test-tags
+cat ../test-tags/.hg_archival.txt
+hg tag -r 2 mytag
+hg tag -l -r 2 anothertag
+hg archive -r 2 ../test-lasttag
+cat ../test-lasttag/.hg_archival.txt
+
 hg archive -t bogus test.bogus
 
 echo % server errors
diff --git a/tests/test-archive.out b/tests/test-archive.out
--- a/tests/test-archive.out
+++ b/tests/test-archive.out
@@ -57,6 +57,17 @@
 test-TIP/baz/bletch
 test-TIP/foo
 rev-0.tar created
+% test .hg_archival.txt
+repo: daa7f7c60e0a224faa4ff77ca41b2760562af264
+node: 2c0277f05ed49d1c8328fb9ba92fba7a5ebcb33e
+branch: default
+latesttag: null
+latesttagdistance: 3
+repo: daa7f7c60e0a224faa4ff77ca41b2760562af264
+node: 2c0277f05ed49d1c8328fb9ba92fba7a5ebcb33e
+branch: default
+localtag: anothertag
+tag: mytag
 abort: unknown archive type 'bogus'
 % server errors
 % empty repo