Mercurial Blame Trail

An interactive mode for hg blame that helps you trace when a particular line was introduced - not just when it was last edited.

Essentially it automates this process:

hg blame -n some/file.py
<manually inspect file to find changeset line was last modified in>
hg up <changeset>
hg blame -n some/file.py
<manually inspect file to find changeset line was last modified in>
hg up <changeset>
hg blame -n some/file.py
<manually inspect file to find changeset line was last modified in>
hg up <changeset>
...

Usage

This extension adds a couple of options to hg blame:

• --trail which should be given a line number, and activates the interactive mode
• --context the number of lines to display before and after the line being traced

Example of tracing line 116 of a file, with a context of 2:

$ hg blame --trail 116 some/file.py --context=2

Install

Add the following to your .hgrc:

[extensions]
blametrail = /path/to/hg-blametrail/blametrail.py