contrib: add a commit synthesizer for reproducing scaling problems
This adds two new commands:
- analyze examines an existing repo and writes out a statistical
description of its properties that contains no identifying
information.
- synthesize creates new commits based on the description generated
by analyze.
The intention is that a repo constructed using synthesize will have
properties that are vaguely statistically similar to the originating
repo, but entirely random content.
This can be useful for forecasting performance as a repo grows, and
for developers who want to find bottlenecks in proprietary repos
to which they do not have access.
$ hg init
$ echo a > a
$ hg ci -qAm 'add a'
$ echo b > b
$ hg ci -qAm 'add b'
$ hg up -qC 0
$ hg rm a
$ hg ci -m 'rm a'
created new head
$ hg up -qC 1
$ rm a
Local deleted a file, remote removed
Should fail, since there are deleted files:
$ hg merge
abort: outstanding uncommitted changes
(use 'hg status' to list changes)
[255]
Should succeed with --force:
$ hg -v merge --force
resolving manifests
removing a
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
(branch merge, don't forget to commit)
Should show 'a' as removed:
$ hg status
R a
$ hg ci -m merge
Should not show 'a':
$ hg manifest
b