Re: [RFC/PATCH] Add interpret-trailers builtin

On Wed, Nov 6, 2013 at 7:43 AM, Christian Couder
[off-list ref] wrote:

Of course in the latter case, a command should probably be specified
to tell which value should be used with the key.

For example:

[trailer "signoff"]
         key = "Signed-off-by:"
         if_missing = append
         command = echo "$GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"'

would append a s-o-b line only if there is no s-o-b already.

Sorry, I realize that I was wrong above.
As the default for "if_exist" is "dont_repeat", the above would append
a s-o-b if there is no s-o-b or if there is one but with a different
value.

To append a s-o-b only if there is no s-o-b already, one would need to use:

[trailer "signoff"]
         key = "Signed-off-by:"
         if_exist = dont_append
         if_missing = append
         command = echo "$GIT_COMMITTER_NAME <$GIT_COMMITTER_EMAIL>"'

Thanks,
Christian.