Documentation / git-help.txton commit mergetool: support --tool-help option like difftool does (109859e)
   1git-help(1)
   2===========
   3
   4NAME
   5----
   6git-help - display help information about git
   7
   8SYNOPSIS
   9--------
  10[verse]
  11'git help' [-a|--all|-i|--info|-m|--man|-w|--web] [COMMAND]
  12
  13DESCRIPTION
  14-----------
  15
  16With no options and no COMMAND given, the synopsis of the 'git'
  17command and a list of the most commonly used git commands are printed
  18on the standard output.
  19
  20If the option '--all' or '-a' is given, then all available commands are
  21printed on the standard output.
  22
  23If a git command is named, a manual page for that command is brought
  24up. The 'man' program is used by default for this purpose, but this
  25can be overridden by other options or configuration variables.
  26
  27Note that `git --help ...` is identical to `git help ...` because the
  28former is internally converted into the latter.
  29
  30OPTIONS
  31-------
  32-a::
  33--all::
  34        Prints all the available commands on the standard output. This
  35        option supersedes any other option.
  36
  37-i::
  38--info::
  39        Display manual page for the command in the 'info' format. The
  40        'info' program will be used for that purpose.
  41
  42-m::
  43--man::
  44        Display manual page for the command in the 'man' format. This
  45        option may be used to override a value set in the
  46        'help.format' configuration variable.
  47+
  48By default the 'man' program will be used to display the manual page,
  49but the 'man.viewer' configuration variable may be used to choose
  50other display programs (see below).
  51
  52-w::
  53--web::
  54        Display manual page for the command in the 'web' (HTML)
  55        format. A web browser will be used for that purpose.
  56+
  57The web browser can be specified using the configuration variable
  58'help.browser', or 'web.browser' if the former is not set. If none of
  59these config variables is set, the 'git web{litdd}browse' helper script
  60(called by 'git help') will pick a suitable default. See
  61linkgit:git-web{litdd}browse[1] for more information about this.
  62
  63CONFIGURATION VARIABLES
  64-----------------------
  65
  66help.format
  67~~~~~~~~~~~
  68
  69If no command line option is passed, the 'help.format' configuration
  70variable will be checked. The following values are supported for this
  71variable; they make 'git help' behave as their corresponding command
  72line option:
  73
  74* "man" corresponds to '-m|--man',
  75* "info" corresponds to '-i|--info',
  76* "web" or "html" correspond to '-w|--web'.
  77
  78help.browser, web.browser and browser.<tool>.path
  79~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  80
  81The 'help.browser', 'web.browser' and 'browser.<tool>.path' will also
  82be checked if the 'web' format is chosen (either by command line
  83option or configuration variable). See '-w|--web' in the OPTIONS
  84section above and linkgit:git-web{litdd}browse[1].
  85
  86man.viewer
  87~~~~~~~~~~
  88
  89The 'man.viewer' config variable will be checked if the 'man' format
  90is chosen. The following values are currently supported:
  91
  92* "man": use the 'man' program as usual,
  93* "woman": use 'emacsclient' to launch the "woman" mode in emacs
  94(this only works starting with emacsclient versions 22),
  95* "konqueror": use 'kfmclient' to open the man page in a new konqueror
  96tab (see 'Note about konqueror' below).
  97
  98Values for other tools can be used if there is a corresponding
  99'man.<tool>.cmd' configuration entry (see below).
 100
 101Multiple values may be given to the 'man.viewer' configuration
 102variable. Their corresponding programs will be tried in the order
 103listed in the configuration file.
 104
 105For example, this configuration:
 106
 107------------------------------------------------
 108        [man]
 109                viewer = konqueror
 110                viewer = woman
 111------------------------------------------------
 112
 113will try to use konqueror first. But this may fail (for example if
 114DISPLAY is not set) and in that case emacs' woman mode will be tried.
 115
 116If everything fails, or if no viewer is configured, the viewer specified
 117in the GIT_MAN_VIEWER environment variable will be tried.  If that
 118fails too, the 'man' program will be tried anyway.
 119
 120man.<tool>.path
 121~~~~~~~~~~~~~~~
 122
 123You can explicitly provide a full path to your preferred man viewer by
 124setting the configuration variable 'man.<tool>.path'. For example, you
 125can configure the absolute path to konqueror by setting
 126'man.konqueror.path'. Otherwise, 'git help' assumes the tool is
 127available in PATH.
 128
 129man.<tool>.cmd
 130~~~~~~~~~~~~~~
 131
 132When the man viewer, specified by the 'man.viewer' configuration
 133variables, is not among the supported ones, then the corresponding
 134'man.<tool>.cmd' configuration variable will be looked up. If this
 135variable exists then the specified tool will be treated as a custom
 136command and a shell eval will be used to run the command with the man
 137page passed as arguments.
 138
 139Note about konqueror
 140~~~~~~~~~~~~~~~~~~~~
 141
 142When 'konqueror' is specified in the 'man.viewer' configuration
 143variable, we launch 'kfmclient' to try to open the man page on an
 144already opened konqueror in a new tab if possible.
 145
 146For consistency, we also try such a trick if 'man.konqueror.path' is
 147set to something like 'A_PATH_TO/konqueror'. That means we will try to
 148launch 'A_PATH_TO/kfmclient' instead.
 149
 150If you really want to use 'konqueror', then you can use something like
 151the following:
 152
 153------------------------------------------------
 154        [man]
 155                viewer = konq
 156
 157        [man "konq"]
 158                cmd = A_PATH_TO/konqueror
 159------------------------------------------------
 160
 161Note about git config --global
 162~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 163
 164Note that all these configuration variables should probably be set
 165using the '--global' flag, for example like this:
 166
 167------------------------------------------------
 168$ git config --global help.format web
 169$ git config --global web.browser firefox
 170------------------------------------------------
 171
 172as they are probably more user specific than repository specific.
 173See linkgit:git-config[1] for more information about this.
 174
 175GIT
 176---
 177Part of the linkgit:git[1] suite