Retrieve Git history for a specific line in a file



Published: 2020-08-18 15:00:34 +0000
Categories: Git,

Language

Git

Description

With git blame you can view the last commit which changed any given line, but what if you want to see the history/activity of a specific line - why was it added, who changed it and when?

Git 1.8.4 introduced the ability to do this with git log, you just need to know the (current) line number

Snippet

git log -L $lineno,$endlineno:$file

Usage Example

ben@milleniumfalcon:~/Documents/src.old/HLS-Stream-Creator$ git log -L 351,351:HLS-Stream-Creator.sh
commit db85e45814b2a163c5ae927bca36a74460483fe7
Author: B Tasker <github@mail>
Date:   Fri Jul 26 13:03:02 2019 +0100

    HLS-24 Allow audio track to be ignored with the `-n` commandline argument

    This forces `-an` to be passed to `ffmpeg`.

    It's not generally required, as missing audio tracks will be handled by default, but this allows the user to address inputs where `ffmpeg` reports the Audio type as `none`:

        Stream #0:0: Video: flv1, 1 reference frame, yuv420p, 1280x720, 199 kb/s, 8.33 tbr, 1k tbn, 1k tbc
        Stream #0:1: Audio: none, 0 channels

    This test stream was the result of a webcam being published into an RTMP relay with FFMPEG and then pulled back out the other side.

diff --git a/HLS-Stream-Creator.sh b/HLS-Stream-Creator.sh
--- a/HLS-Stream-Creator.sh
+++ b/HLS-Stream-Creator.sh
@@ -300,1 +302,1 @@
-while getopts "i:o:s:c:b:p:t:S:q:u:k:K:Clfe2" flag
+while getopts "i:o:s:c:b:p:t:S:q:u:k:K:Clfe2n" flag

commit bc201e0d5089166793646bdfa27d52be53c62d99
Author: JapSeyz <JapSeyz@mail>
Date:   Fri Oct 13 22:03:38 2017 +0300

    Added -u, -k and -K flags

diff --git a/HLS-Stream-Creator.sh b/HLS-Stream-Creator.sh
--- a/HLS-Stream-Creator.sh
+++ b/HLS-Stream-Creator.sh
@@ -269,1 +278,1 @@
-while getopts "i:o:s:c:b:p:t:S:q:Clfe2" flag
+while getopts "i:o:s:c:b:p:t:S:q:u:k:K:Clfe2" flag

Keywords

git, log, file, line, history, changes, commits,

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