Documentation: Update Lesson2.md

Update Lesson2.md to include information about updating a commit after
it has been pushed to the remote repository.

Change-Id: Iebf86113b13d859d9c9e3db51e22ea44cb1144f6
Signed-off-by: Evelyn Huang <evhuang@google.com>
Reviewed-on: https://review.coreboot.org/20948
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
microserver
Evelyn Huang 5 years ago committed by Martin Roth
parent 0805a7e66a
commit 824c85c9a5
  1. 29
      Documentation/Lesson2.md

@ -251,4 +251,31 @@ preferences. If you wish to do so, look at the "All configs for .bashrc" section
on https://github.com/magicmonty/bash-git-prompt. Listed in that section are
various lines that you can copy, uncomment and add to your .bashrc file to
change the configurations. Example configurations include avoid fetching remote
status, and supporting versions of Git older than 1.7.10.
status, and supporting versions of Git older than 1.7.10.
## Appendix: Miscellaneous Advice
### Updating a commit after running git push:
Suppose you would like to update a commit that has already been pushed to the
remote repository. If the commit you wish to update is the most recent
commit you have made, after making your desired changes, stage the files
(either using git add or in git cola), and amend the commit. To do so,
if you are using the command line, run "git commit --amend." If you are
using git cola, click on the gear icon located on the upper left side under
**Commit** and select **Amend Last Commit** in the drop down menu. Then, stage
the files you have changed, commit the changes, and run git push to push the
changes to the remote repository. Your change should be reflected in Gerrit as
a new patch set.
If, however, the commit you wish to update is not the most recent commit you
have made, you will first need to checkout that commit. To do so, find the
URL of the commit on <https://review.coreboot.org> and go to that page; if
the commit is one that you previously pushed, it can be found by selecting
**My** and then **Changes** in the upper left corner. To checkout this commit,
in the upper right corner, click on **Download**, and copy the command listed
next to checkout by clicking **Copy to clipboard**. Then, run the copied
command in your coreboot repository. Now, the last commit should be the most
recent commit to that patch; to update it, make your desired changes, stage
the files, then amend and push the commit using the instructions in the above
paragraph.
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