lab 10 History

Goals

Getting a listing of what changes have been made is the function of the git log command.

Execute:

git log

You should see …

Output:

$ git log
commit a1189df6a2e597e7d31c2ecf07a9068cf820ce29
Author: Jim Weirich <jim (at) edgecase.com>
Date:   Sat Oct 25 16:25:15 2014 -0400

    Added a comment

commit 6083cb81b8d92c360ec07cd6566ad895d15c5db6
Author: Jim Weirich <jim (at) edgecase.com>
Date:   Sat Oct 25 16:25:15 2014 -0400

    Added a default value

commit b24f3ffefa338661aadc3861aa24013796ddde40
Author: Jim Weirich <jim (at) edgecase.com>
Date:   Sat Oct 25 16:25:15 2014 -0400

    Using ARGV

commit cf466b4441efcc74b0a3d03b32ecbbb8988fbe39
Author: Jim Weirich <jim (at) edgecase.com>
Date:   Sat Oct 25 16:25:15 2014 -0400

    First Commit

Here is a list of all four commits that we have made to the repository so far.

One Line Histories 01

You have a great deal of control over exactly what the log command displays. I like the one line format:

Execute:

git log --pretty=oneline

You should see …

Output:

$ git log --pretty=oneline
a1189df6a2e597e7d31c2ecf07a9068cf820ce29 Added a comment
6083cb81b8d92c360ec07cd6566ad895d15c5db6 Added a default value
b24f3ffefa338661aadc3861aa24013796ddde40 Using ARGV
cf466b4441efcc74b0a3d03b32ecbbb8988fbe39 First Commit

Controlling Which Entries are Displayed 02

There are a lot of options for selecting which entries are displayed in the log. Play around with the following options:

git log --pretty=oneline --max-count=2
git log --pretty=oneline --since='5 minutes ago'
git log --pretty=oneline --until='5 minutes ago'
git log --pretty=oneline --author=<your name>
git log --pretty=oneline --all

See man git-log for all the details.

Getting Fancy 03

Here’s what I use to review the changes made in the last week. I’ll add --author=jim if I only want to see changes I made.

git log --all --pretty=format:'%h %cd %s (%an)' --since='7 days ago'

The Ultimate Log Format 04

Over time, I’ve decided that I like the following log format for most of my work.

Execute:

git log --pretty=format:'%h %ad | %s%d [%an]' --graph --date=short

It looks like this:

Output:

$ git log --pretty=format:'%h %ad | %s%d [%an]' --graph --date=short
* a1189df 2014-10-25 | Added a comment (HEAD, master) [Jim Weirich]
* 6083cb8 2014-10-25 | Added a default value [Jim Weirich]
* b24f3ff 2014-10-25 | Using ARGV [Jim Weirich]
* cf466b4 2014-10-25 | First Commit [Jim Weirich]

Let’s look at it in detail:

This is a lot to type every time you want to see the log. Fortunately we will learn about git aliases in the next lab.

Other Tools 05

Both gitx (for Macs) and gitk (any platform) are useful in exploring log history.

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