diff --git a/Documentation/git-interpret-trailers.txt b/Documentation/git-interpret-trailers.txt index 4b97f812be..55d8961466 100644 --- a/Documentation/git-interpret-trailers.txt +++ b/Documentation/git-interpret-trailers.txt @@ -14,21 +14,38 @@ SYNOPSIS DESCRIPTION ----------- -Help parsing or adding 'trailers' lines, that look similar to RFC 822 e-mail +Add or parse 'trailer' lines that look similar to RFC 822 e-mail headers, at the end of the otherwise free-form part of a commit -message. +message. For example, in the following commit message -This command reads some patches or commit messages from either the - arguments or the standard input if no is specified. If -`--parse` is specified, the output consists of the parsed trailers. +------------------------------------------------ +subject +Lorem ipsum dolor sit amet, consectetur adipiscing elit. + +Signed-off-by: Alice +Signed-off-by: Bob +------------------------------------------------ + +the last two lines starting with "Signed-off-by" are trailers. + +This command reads commit messages from either the + arguments or the standard input if no is specified. +If `--parse` is specified, the output consists of the parsed trailers. Otherwise, this command applies the arguments passed using the -`--trailer` option, if any, to the commit message part of each input -file. The result is emitted on the standard output. +`--trailer` option, if any, to each input file. The result is emitted on the +standard output. + +This command can also operate on the output of linkgit:git-format-patch[1], +which is more elaborate than a plain commit message. Namely, such output +includes a commit message (as above), a "---" divider line, and a patch part. +For these inputs, the divider and patch parts are not modified by +this command and are emitted as is on the output, unless +`--no-divider` is specified. Some configuration variables control the way the `--trailer` arguments -are applied to each commit message and the way any existing trailer in -the commit message is changed. They also make it possible to +are applied to each input and the way any existing trailer in +the input is changed. They also make it possible to automatically add some trailers. By default, a '=' or ':' argument given @@ -36,41 +53,46 @@ using `--trailer` will be appended after the existing trailers only if the last trailer has a different (, ) pair (or if there is no existing trailer). The and parts will be trimmed to remove starting and trailing whitespace, and the resulting trimmed - and will appear in the message like this: + and will appear in the output like this: ------------------------------------------------ token: value ------------------------------------------------ This means that the trimmed and will be separated by -`': '` (one colon followed by one space). +`': '` (one colon followed by one space). For convenience, the can be a +shortened string key (e.g., "sign") instead of the full string which should +appear before the separator on the output (e.g., "Signed-off-by"). This can be +configured using the 'trailer..key' configuration variable. By default the new trailer will appear at the end of all the existing trailers. If there is no existing trailer, the new trailer will appear -after the commit message part of the output, and, if there is no line -with only spaces at the end of the commit message part, one blank line -will be added before the new trailer. +at the end of the input. A blank line will be added before the new +trailer if there isn't one already. -Existing trailers are extracted from the input message by looking for +Existing trailers are extracted from the input by looking for a group of one or more lines that (i) is all trailers, or (ii) contains at least one Git-generated or user-configured trailer and consists of at least 25% trailers. The group must be preceded by one or more empty (or whitespace-only) lines. -The group must either be at the end of the message or be the last +The group must either be at the end of the input or be the last non-whitespace lines before a line that starts with '---' (followed by a -space or the end of the line). Such three minus signs start the patch -part of the message. See also `--no-divider` below. +space or the end of the line). When reading trailers, there can be no whitespace before or inside the -token, but any number of regular space and tab characters are allowed -between the token and the separator. There can be whitespaces before, -inside or after the value. The value may be split over multiple lines +, but any number of regular space and tab characters are allowed +between the and the separator. There can be whitespaces before, +inside or after the . The may be split over multiple lines with each subsequent line starting with at least one whitespace, like -the "folding" in RFC 822. +the "folding" in RFC 822. Example: -Note that 'trailers' do not follow and are not intended to follow many -rules for RFC 822 headers. For example they do not follow -the encoding rules and probably many other rules. +------------------------------------------------ +token: This is a very long value, with spaces and + newlines in it. +------------------------------------------------ + +Note that trailers do not follow (nor are they intended to follow) many of the +rules for RFC 822 headers. For example they do not follow the encoding rule. OPTIONS ------- @@ -79,12 +101,12 @@ OPTIONS --trim-empty:: If the part of any trailer contains only whitespace, - the whole trailer will be removed from the resulting message. + the whole trailer will be removed from the output. This applies to existing trailers as well as new trailers. --trailer [(=|:)]:: Specify a (, ) pair that should be applied as a - trailer to the input messages. See the description of this + trailer to the inputs. See the description of this command. --where :: @@ -98,7 +120,7 @@ OPTIONS --if-exists :: --no-if-exists:: Specify what action will be performed when there is already at - least one trailer with the same in the message. A setting + least one trailer with the same in the input. A setting provided with '--if-exists' overrides all configuration variables and applies to all '--trailer' options until the next occurrence of '--if-exists' or '--no-if-exists'. Possible actions are `addIfDifferent`, @@ -107,7 +129,7 @@ OPTIONS --if-missing :: --no-if-missing:: Specify what action will be performed when there is no other - trailer with the same in the message. A setting + trailer with the same in the input. A setting provided with '--if-missing' overrides all configuration variables and applies to all '--trailer' options until the next occurrence of '--if-missing' or '--no-if-missing'. Possible actions are `doNothing` @@ -174,7 +196,7 @@ first trailer with the same . trailer.ifexists:: This option makes it possible to choose what action will be performed when there is already at least one trailer with the - same in the message. + same in the input. + The valid values for this option are: `addIfDifferentNeighbor` (this is the default), `addIfDifferent`, `add`, `replace` or `doNothing`. @@ -184,10 +206,10 @@ trailer with the same (, ) pair is above or below the line where the new trailer will be added. + With `addIfDifferent`, a new trailer will be added only if no trailer -with the same (, ) pair is already in the message. +with the same (, ) pair is already in the input. + With `add`, a new trailer will be added, even if some trailers with -the same (, ) pair are already in the message. +the same (, ) pair are already in the input. + With `replace`, an existing trailer with the same will be deleted and the new trailer will be added. The deleted trailer will be @@ -195,12 +217,12 @@ the closest one (with the same ) to the place where the new one will be added. + With `doNothing`, nothing will be done; that is no new trailer will be -added if there is already one with the same in the message. +added if there is already one with the same in the input. trailer.ifmissing:: This option makes it possible to choose what action will be performed when there is not yet any trailer with the same - in the message. + in the input. + The valid values for this option are: `add` (this is the default) and `doNothing`. @@ -235,13 +257,13 @@ trailer..ifmissing:: that option for trailers with the specified . trailer..command:: + Deprecated in favor of 'trailer..cmd'. This option behaves in the same way as 'trailer..cmd', except that it doesn't pass anything as argument to the specified command. Instead the first occurrence of substring $ARG is replaced by the - value that would be passed as argument. + that would be passed as argument. + -The 'trailer..command' option has been deprecated in favor of -'trailer..cmd' due to the fact that $ARG in the user's command is +Note that $ARG in the user's command is only replaced once and that the original way of replacing $ARG is not safe. + When both 'trailer..cmd' and 'trailer..command' are given @@ -249,10 +271,10 @@ for the same , 'trailer..cmd' is used and 'trailer..command' is ignored. trailer..cmd:: - This option can be used to specify a shell command that will be called: + This option can be used to specify a shell command that will be called once to automatically add a trailer with the specified , and then - each time a '--trailer =' argument to modify the of - the trailer that this option would produce. + called each time a '--trailer =' argument is specified to + modify the of the trailer that this option would produce. + When the specified command is first called to add a trailer with the specified , the behavior is as if a special @@ -272,37 +294,37 @@ EXAMPLES -------- * Configure a 'sign' trailer with a 'Signed-off-by' key, and then - add two of these trailers to a message: + add two of these trailers to a commit message file: + ------------ $ git config trailer.sign.key "Signed-off-by" $ cat msg.txt subject -message +body text $ git interpret-trailers --trailer 'sign: Alice ' --trailer 'sign: Bob ' Signed-off-by: Bob ------------ -* Use the `--in-place` option to edit a message file in place: +* Use the `--in-place` option to edit a commit message file in place: + ------------ $ cat msg.txt subject -message +body text Signed-off-by: Bob $ git interpret-trailers --trailer 'Acked-by: Alice ' --in-place msg.txt $ cat msg.txt subject -message +body text Signed-off-by: Bob Acked-by: Alice @@ -325,7 +347,7 @@ $ git interpret-trailers --trailer 'Cc: Alice ' --trailer 'Re $ cat msg1.txt subject -message +body text $ git config trailer.sign.key "Signed-off-by: " $ git config trailer.sign.ifmissing add $ git config trailer.sign.ifexists doNothing @@ -333,19 +355,19 @@ $ git config trailer.sign.cmd 'echo "$(git config user.name) <$(git config user. $ git interpret-trailers --trailer sign $ cat msg2.txt subject -message +body text Signed-off-by: Alice $ git interpret-trailers --trailer sign ------------ @@ -373,14 +395,14 @@ test -n "$1" && git log --author="$1" --pretty="%an <%ae>" -1 || true $ cat msg.txt subject -message +body text $ git config trailer.help.key "Helped-by: " $ git config trailer.help.ifExists "addIfDifferentNeighbor" $ git config trailer.help.cmd "~/bin/glog-find-author" $ git interpret-trailers --trailer="help:Junio" --trailer="help:Couder" Helped-by: Christian Couder @@ -397,14 +419,14 @@ test -n "$1" && git log --grep "$1" --pretty=reference -1 || true $ cat msg.txt subject -message +body text $ git config trailer.ref.key "Reference-to: " $ git config trailer.ref.ifExists "replace" $ git config trailer.ref.cmd "~/bin/glog-grep" $ git interpret-trailers --trailer="ref:Add copyright notices."