tests/test-mq-pull-from-bundle.t

tags: introduce _readtaghist function

The existing _readtags function has been modified a little and renamed
_readtaghist. A new _readtaghist function has been added, which is a wrappger
around _readtaghist. Its output is the same as the old _readtaghist.

The purpose of this change is to make it possible to automatically merge tag
files. In order to do so we will need to get the line numbers for each of the
tag-node pairs on the first merge parent.

This is not used yet, but will be used on a follow up patch that will introduce
an automatic tag merge algorithm.

I performed some tests to compare the effect of this change. I used timeit to
run the test-tags.t test a 9 times with and without this patch. The results
were:

- without this patch: 3 loops, best of 3: 8.55 sec per loop
- with this patch:    3 loops, best of 3: 8.49 sec per loop

The the test was on average was slightly faster with this patch (although the
difference was probably not statistically significant).

  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > mq=
  > [alias]
  > tlog = log --template "{rev}: {desc}\\n"
  > theads = heads --template "{rev}: {desc}\\n"
  > tincoming = incoming --template "{rev}: {desc}\\n"
  > EOF

Setup main:

  $ hg init base
  $ cd base
  $ echo "One" > one
  $ hg add
  adding one
  $ hg ci -m "main: one added"
  $ echo "++" >> one
  $ hg ci -m "main: one updated"

Bundle main:

  $ hg bundle --base=null ../main.hg
  2 changesets found

  $ cd ..

Incoming to fresh repo:

  $ hg init fresh

  $ hg -R fresh tincoming main.hg
  comparing with main.hg
  0: main: one added
  1: main: one updated
  $ test -f ./fresh/.hg/hg-bundle* && echo 'temp. bundle file remained' || true

  $ hg -R fresh tincoming bundle:fresh+main.hg
  comparing with bundle:fresh+main.hg
  0: main: one added
  1: main: one updated


Setup queue:

  $ cd base
  $ hg qinit -c
  $ hg qnew -m "patch: two added" two.patch
  $ echo two > two
  $ hg add
  adding two
  $ hg qrefresh
  $ hg qcommit -m "queue: two.patch added"
  $ hg qpop -a
  popping two.patch
  patch queue now empty

Bundle queue:

  $ hg -R .hg/patches bundle --base=null ../queue.hgq
  1 changesets found
  $ test -f ./fresh/.hg/hg-bundle* && echo 'temp. bundle file remained' || true

  $ cd ..


Clone base:

  $ hg clone base copy
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd copy
  $ hg qinit -c

Incoming queue bundle:

  $ hg -R .hg/patches tincoming ../queue.hgq
  comparing with ../queue.hgq
  0: queue: two.patch added
  $ test -f .hg/hg-bundle* && echo 'temp. bundle file remained' || true

Pull queue bundle:

  $ hg -R .hg/patches pull --update ../queue.hgq
  pulling from ../queue.hgq
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 3 changes to 3 files
  merging series
  2 files updated, 1 files merged, 0 files removed, 0 files unresolved
  $ test -f .hg/patches/hg-bundle* && echo 'temp. bundle file remained' || true

  $ hg -R .hg/patches theads
  0: queue: two.patch added

  $ hg -R .hg/patches tlog
  0: queue: two.patch added

  $ hg qseries
  two.patch

  $ cd ..


Clone base again:

  $ hg clone base copy2
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd copy2
  $ hg qinit -c

Unbundle queue bundle:

  $ hg -R .hg/patches unbundle --update ../queue.hgq
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 3 changes to 3 files
  merging series
  2 files updated, 1 files merged, 0 files removed, 0 files unresolved

  $ hg -R .hg/patches theads
  0: queue: two.patch added

  $ hg -R .hg/patches tlog
  0: queue: two.patch added

  $ hg qseries
  two.patch

  $ cd ..