occurrence of
	'--if-exists' or '--no-if-exists'. Upon encountering '--no-if-exists, clear the
	effect of any previous use of '--if-exists, such that the relevant configuration
	variables are no longer overridden. Possible actions are `addIfDifferent`,
	`addIfDifferentNeighbor`, `add`, `replace` and `doNothing`.

--if-missing <action>::
--no-if-missing::
	Specify what action will be performed when there is no other
	trailer with the same <key> in the input.  A setting
	provided with '--if-missing' overrides the `trailer.ifMissing` and any
	applicable `trailer.<keyAlias>.ifMissing` configuration variables
	and applies to all '--trailer' options until the next occurrence of
	'--if-missing' or '--no-if-missing'. Upon encountering '--no-if-missing,
	clear the effect of any previous use of '--if-missing, such that the relevant
	configuration variables are no longer overridden. Possible actions are `doNothing`
	or `add`.

--only-trailers::
	Output only the trailers, not any other parts of the input.

--only-input::
	Output only trailers that exist in the input; do not add any
	from the command-line or by applying `trailer.*` configuration
	variables.

--unfold::
	If a trailer has a value that runs over multiple lines (aka "folded"),
	reformat the value into a single line.

--parse::
	A convenience alias for `--only-trailers --only-input
	--unfold`. This makes it easier to only see the trailers coming from the
	input without influencing them with any command line options or
	configuration variables, while also making the output machine-friendly with
	--unfold.

--no-divider::
	Do not treat `---` as the end of the commit message. Use this
	when you know your input contains just the commit message itself
	(and not an email or the output of `git format-patch`).

CONFIGURATION VARIABLES
-----------------------

include::includes/cmd-config-section-all.adoc[]

include::config/trailer.adoc[]

EXAMPLES
--------

* Configure a 'sign' trailer with a 'Signed-off-by' key, and then
  add two of these trailers to a commit message file:
+
------------
$ git config trailer.sign.key "Signed-off-by"
$ cat msg.txt
subject

body text
$ git interpret-trailers --trailer 'sign: Alice <alice@example.com>' --trailer 'sign: Bob <bob@example.com>' <msg.txt
subject

body text

Signed-off-by: Alice <alice@example.com>
Signed-off-by: Bob <bob@example.com>
------------

* Use the `--in-place` option to edit a commit message file in place:
+
------------
$ cat msg.txt
subject

body text

Signed-off-by: Bob <bob@example.com>
$ git interpret-trailers --trailer 'Acked-by: Alice <alice@example.com>' --in-place msg.txt
$ cat msg.txt
subject

body text

Signed-off-by: Bob <bob@example.com>
Acked-by: Alice <alice@example.com>
------------

* Extract the last commit as a patch, and add a 'Cc' and a
  'Reviewed-by' trailer to it:
+
------------
$ git format-patch -1
0001-foo.patch
$ git interpret-trailers --trailer 'Cc: Alice <alice@example.com>' --trailer 'Reviewed-by: Bob <bob@example.com>' 0001-foo.patch >0001-bar.patch
------------

* Configure a 'sign' trailer with a command to automatically add a
  'Signed-off-by: ' with the author information only if there is no
  'Signed-off-by: ' already, and show how it works:
+
------------
$ cat msg1.txt
subject

body text
$ git config trailer.sign.key "Signed-off-by: "
$ git config trailer.sign.ifmissing add
$ git config trailer.sign.ifexists doNothing
$ git