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The commit author name is taken from the "From: " line of the message, and commit author date is taken from the "Date: " line of the message. The "Subject: " line is used as the title of the commit, after stripping common prefix "[PATCH <anything>]". The "Subject: " line is supposed to concisely describe what the commit is about in one line of text.
"From: " and "Subject: " lines starting the body override the respective commit author name and title values taken from the headers.
The commit message is formed by the title taken from the "Subject: ", a blank line and the body of the message up to where the patch begins. Excess whitespace at the end of each line is automatically stripped.
The patch is expected to be inline, directly following the message. Any line that is of the form:
-
*
three-dashes and end-of-line, or
-
*
a line that begins with "diff -", or
-
*
a line that begins with "Index: "
is taken as the beginning of a patch, and the commit log message is terminated before the first occurrence of such a line.
When initially invoking git am, you give it the names of the mailboxes to process. Upon seeing the first patch that does not apply, it aborts in the middle. You can recover from this in one of two ways:
-
1.
skip the current patch by re-running the command with the
--skip
option.
-
2.
hand resolve the conflict in the working directory, and update the index file to bring it into a state that the patch should have produced. Then run the command with the
--resolved
option.
The command refuses to process new mailboxes while the .git/rebase-apply directory exists, so if you decide to start over from scratch, run rm -f -r .git/rebase-apply before running the command with mailbox names.
Before any patches are applied, ORIG_HEAD is set to the tip of the current branch. This is useful if you have problems with multiple commits, like running git am on the wrong branch or an error in the commits that is more easily fixed by changing the mailbox (e.g. errors in the "From:" lines).
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