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13-Filter-commit-history-with-git-log-arguments.md

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Filter commit history with git log arguments

Options for Filter git log Output

We can use options with git log to filter our results so that they're more specific.

  • git log -num - Insert number of your choosing where num is. This will show us the num most recent commits. So git log -3 will show us the 3 most recent commits.

  • --after - Allows us to view commits that were made after a certain specified time. Here are some of the time frames we can specify

    • --after="yesterday"
    • --after="30 minutes ago"
    • --after="last Tuesday" - You can insert any day here
    • --after="2 weeks ago" - You can insert "months" or "years" too
    • --after="3-15-16"- You can insert any date here. It can also be formatted like "3/15/16"

  • --before- Works like --after. Instead allows us to view commits that were made before are certain specified time frame. It follows the same dating format as --after.

  • --since - Does the same thing as --after. You can use whichever you prefer.

  • --until - Does the same thing as --before.

  • --author - Allows us to filter out commits made by a specific person. Enter the name in quotes following the equal sign. git log --author="Ceora"

    • Can also search email addresses.

  • --grep - Allows us to search commit messages. Formatted like --author. Place the message text you want to search in quotes after the equal sign. git log --grep="copyright"

  • --no-merges - Only shows commits that are not merge commits.

  • git log filename - Allows us to see commits made in reference to a specific file. Include the file name after git log.

Options For Displaying Commits that Add/Remote Code

  • -S - This filters down to commits that change (add or remove) a certain string in our code. It's formatted like so: git log -S"Math". Notice that there is no equal sign between the option and the value. This will show us all the commits that use the "Math" object. We'll only see the commit log and not the code changes.

    • If we want to see the code changes we can use the patch formatting option -p. git log -p -S"Math"

  • -G - We can also make searches using Regular Expressions using this option. git log -GMath\|Random

Flags

We can also combine options for even more efficient results. Here are some add on options that are often used to do this.

  • -i- This is the ignore flag. This ignores the case of our searches. git log -i --author="Jane" will now show results that also include jane.

Comnbining Options

Options can be combined!

git log -3 -i --author="ceora" README.md

This will output the last 3 commits made to the README.md file by someone named "ceora" or "Ceora" because case doesn't matter since we used the -i flag.