diff options
Diffstat (limited to 'git-interpret-trailers.txt')
| -rw-r--r-- | git-interpret-trailers.txt | 183 |
1 files changed, 108 insertions, 75 deletions
diff --git a/git-interpret-trailers.txt b/git-interpret-trailers.txt index 55d896146..418265f04 100644 --- a/git-interpret-trailers.txt +++ b/git-interpret-trailers.txt @@ -9,7 +9,7 @@ SYNOPSIS -------- [verse] 'git interpret-trailers' [--in-place] [--trim-empty] - [(--trailer <token>[(=|:)<value>])...] + [(--trailer (<key>|<keyAlias>)[(=|:)<value>])...] [--parse] [<file>...] DESCRIPTION @@ -31,10 +31,15 @@ the last two lines starting with "Signed-off-by" are trailers. This command reads commit messages from either the <file> arguments or the standard input if no <file> 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 each input file. The result is emitted on the -standard output. +If `--parse` is specified, the output consists of the parsed trailers +coming from the input, without influencing them with any command line +options or configuration variables. + +Otherwise, this command applies `trailer.*` configuration variables +(which could potentially add new trailers, as well as reposition them), +as well as any command line arguments that can override configuration +variables (such as `--trailer=...` which could also add new trailers), +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 @@ -48,22 +53,32 @@ 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 '<token>=<value>' or '<token>:<value>' argument given +By default, a '<key>=<value>' or '<key>:<value>' argument given using `--trailer` will be appended after the existing trailers only if -the last trailer has a different (<token>, <value>) pair (or if there -is no existing trailer). The <token> and <value> parts will be trimmed +the last trailer has a different (<key>, <value>) pair (or if there +is no existing trailer). The <key> and <value> parts will be trimmed to remove starting and trailing whitespace, and the resulting trimmed -<token> and <value> will appear in the output like this: +<key> and <value> will appear in the output like this: ------------------------------------------------ -token: value +key: value ------------------------------------------------ -This means that the trimmed <token> and <value> will be separated by -`': '` (one colon followed by one space). For convenience, the <token> 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.<token>.key' configuration variable. +This means that the trimmed <key> and <value> will be separated by +`': '` (one colon followed by one space). + +For convenience, a <keyAlias> can be configured to make using `--trailer` +shorter to type on the command line. This can be configured using the +'trailer.<keyAlias>.key' configuration variable. The <keyAlias> must be a prefix +of the full <key> string, although case sensitivity does not matter. For +example, if you have + +------------------------------------------------ +trailer.sign.key "Signed-off-by: " +------------------------------------------------ + +in your configuration, you only need to specify `--trailer="sign: foo"` +on the command line instead of `--trailer="Signed-off-by: foo"`. 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 @@ -80,14 +95,14 @@ non-whitespace lines before a line that starts with '---' (followed by a 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, +<key>, but any number of regular space and tab characters are allowed +between the <key> and the separator. There can be whitespaces before, inside or after the <value>. The <value> may be split over multiple lines with each subsequent line starting with at least one whitespace, like the "folding" in RFC 822. Example: ------------------------------------------------ -token: This is a very long value, with spaces and +key: This is a very long value, with spaces and newlines in it. ------------------------------------------------ @@ -104,35 +119,44 @@ OPTIONS the whole trailer will be removed from the output. This applies to existing trailers as well as new trailers. ---trailer <token>[(=|:)<value>]:: - Specify a (<token>, <value>) pair that should be applied as a +--trailer <key>[(=|:)<value>]:: + Specify a (<key>, <value>) pair that should be applied as a trailer to the inputs. See the description of this command. --where <placement>:: --no-where:: Specify where all new trailers will be added. A setting - provided with '--where' overrides all configuration variables + provided with '--where' overrides the `trailer.where` and any + applicable `trailer.<keyAlias>.where` configuration variables and applies to all '--trailer' options until the next occurrence of - '--where' or '--no-where'. Possible values are `after`, `before`, - `end` or `start`. + '--where' or '--no-where'. Upon encountering '--no-where', clear the + effect of any previous use of '--where', such that the relevant configuration + variables are no longer overridden. Possible placements are `after`, + `before`, `end` or `start`. --if-exists <action>:: --no-if-exists:: Specify what action will be performed when there is already at - least one trailer with the same <token> in the input. A setting - provided with '--if-exists' overrides all configuration variables + least one trailer with the same <key> in the input. A setting + provided with '--if-exists' overrides the `trailer.ifExists` and any + applicable `trailer.<keyAlias>.ifExists` configuration variables and applies to all '--trailer' options until the next occurrence of - '--if-exists' or '--no-if-exists'. Possible actions are `addIfDifferent`, + '--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 <token> in the input. A setting - provided with '--if-missing' overrides all configuration variables + 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'. Possible actions are `doNothing` + '--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:: @@ -140,16 +164,19 @@ OPTIONS --only-input:: Output only trailers that exist in the input; do not add any - from the command-line or by following configured `trailer.*` - rules. + from the command-line or by applying `trailer.*` configuration + variables. --unfold:: - Remove any whitespace-continuation in trailers, so that each - trailer appears on a line by itself with its full content. + 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`. + --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 @@ -170,11 +197,11 @@ used when another separator is not specified in the config for this trailer. + For example, if the value for this option is "%=$", then only lines -using the format '<token><sep><value>' with <sep> containing '%', '=' +using the format '<key><sep><value>' with <sep> containing '%', '=' or '$' and then spaces will be considered trailers. And '%' will be the default separator used, so by default trailers will appear like: -'<token>% <value>' (one percent sign and one space will appear between -the token and the value). +'<key>% <value>' (one percent sign and one space will appear between +the key and the value). trailer.where:: This option tells where a new trailer will be added. @@ -188,41 +215,41 @@ If it is `start`, then each new trailer will appear at the start, instead of the end, of the existing trailers. + If it is `after`, then each new trailer will appear just after the -last trailer with the same <token>. +last trailer with the same <key>. + If it is `before`, then each new trailer will appear just before the -first trailer with the same <token>. +first trailer with the same <key>. 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 <token> in the input. + same <key> in the input. + The valid values for this option are: `addIfDifferentNeighbor` (this is the default), `addIfDifferent`, `add`, `replace` or `doNothing`. + With `addIfDifferentNeighbor`, a new trailer will be added only if no -trailer with the same (<token>, <value>) pair is above or below the line +trailer with the same (<key>, <value>) 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 (<token>, <value>) pair is already in the input. +with the same (<key>, <value>) pair is already in the input. + With `add`, a new trailer will be added, even if some trailers with -the same (<token>, <value>) pair are already in the input. +the same (<key>, <value>) pair are already in the input. + -With `replace`, an existing trailer with the same <token> will be +With `replace`, an existing trailer with the same <key> will be deleted and the new trailer will be added. The deleted trailer will be -the closest one (with the same <token>) to the place where the new one +the closest one (with the same <key>) 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 <token> in the input. +added if there is already one with the same <key> 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 - <token> in the input. + <key> in the input. + The valid values for this option are: `add` (this is the default) and `doNothing`. @@ -231,34 +258,40 @@ With `add`, a new trailer will be added. + With `doNothing`, nothing will be done. -trailer.<token>.key:: - This `key` will be used instead of <token> in the trailer. At - the end of this key, a separator can appear and then some - space characters. By default the only valid separator is ':', - but this can be changed using the `trailer.separators` config - variable. +trailer.<keyAlias>.key:: + Defines a <keyAlias> for the <key>. The <keyAlias> must be a + prefix (case does not matter) of the <key>. For example, in `git + config trailer.ack.key "Acked-by"` the "Acked-by" is the <key> and + the "ack" is the <keyAlias>. This configuration allows the shorter + `--trailer "ack:..."` invocation on the command line using the "ack" + <keyAlias> instead of the longer `--trailer "Acked-by:..."`. ++ +At the end of the <key>, a separator can appear and then some +space characters. By default the only valid separator is ':', +but this can be changed using the `trailer.separators` config +variable. + -If there is a separator, then the key will be used instead of both the -<token> and the default separator when adding the trailer. +If there is a separator in the key, then it overrides the default +separator when adding the trailer. -trailer.<token>.where:: +trailer.<keyAlias>.where:: This option takes the same values as the 'trailer.where' configuration variable and it overrides what is specified by - that option for trailers with the specified <token>. + that option for trailers with the specified <keyAlias>. -trailer.<token>.ifexists:: +trailer.<keyAlias>.ifexists:: This option takes the same values as the 'trailer.ifexists' configuration variable and it overrides what is specified by - that option for trailers with the specified <token>. + that option for trailers with the specified <keyAlias>. -trailer.<token>.ifmissing:: +trailer.<keyAlias>.ifmissing:: This option takes the same values as the 'trailer.ifmissing' configuration variable and it overrides what is specified by - that option for trailers with the specified <token>. + that option for trailers with the specified <keyAlias>. -trailer.<token>.command:: - Deprecated in favor of 'trailer.<token>.cmd'. - This option behaves in the same way as 'trailer.<token>.cmd', except +trailer.<keyAlias>.command:: + Deprecated in favor of 'trailer.<keyAlias>.cmd'. + This option behaves in the same way as 'trailer.<keyAlias>.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. @@ -266,29 +299,29 @@ trailer.<token>.command:: 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.<token>.cmd' and 'trailer.<token>.command' are given -for the same <token>, 'trailer.<token>.cmd' is used and -'trailer.<token>.command' is ignored. +When both 'trailer.<keyAlias>.cmd' and 'trailer.<keyAlias>.command' are given +for the same <keyAlias>, 'trailer.<keyAlias>.cmd' is used and +'trailer.<keyAlias>.command' is ignored. -trailer.<token>.cmd:: +trailer.<keyAlias>.cmd:: This option can be used to specify a shell command that will be called - once to automatically add a trailer with the specified <token>, and then - called each time a '--trailer <token>=<value>' argument is specified to + once to automatically add a trailer with the specified <keyAlias>, and then + called each time a '--trailer <keyAlias>=<value>' argument is specified to modify the <value> of the trailer that this option would produce. + When the specified command is first called to add a trailer -with the specified <token>, the behavior is as if a special -'--trailer <token>=<value>' argument was added at the beginning +with the specified <keyAlias>, the behavior is as if a special +'--trailer <keyAlias>=<value>' argument was added at the beginning of the "git interpret-trailers" command, where <value> is taken to be the standard output of the command with any leading and trailing whitespace trimmed off. + -If some '--trailer <token>=<value>' arguments are also passed +If some '--trailer <keyAlias>=<value>' arguments are also passed on the command line, the command is called again once for each -of these arguments with the same <token>. And the <value> part +of these arguments with the same <keyAlias>. And the <value> part of these arguments, if any, will be passed to the command as its first argument. This way the command can produce a <value> computed -from the <value> passed in the '--trailer <token>=<value>' argument. +from the <value> passed in the '--trailer <keyAlias>=<value>' argument. EXAMPLES -------- |