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-rw-r--r--Documentation/config.txt4
-rw-r--r--Documentation/git-help.txt59
-rw-r--r--help.c116
3 files changed, 168 insertions, 11 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index ed2cb832b..0865f4e01 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -757,6 +757,10 @@ log.showroot::
Tools like linkgit:git-log[1] or linkgit:git-whatchanged[1], which
normally hide the root commit will now show it. True by default.
+man.viewer::
+ Specify the programs that may be used to display help in the
+ 'man' format. See linkgit:git-help[1].
+
merge.summary::
Whether to include summaries of merged commits in newly created
merge commit messages. False by default.
diff --git a/Documentation/git-help.txt b/Documentation/git-help.txt
index 0926dc12b..be2ae53b9 100644
--- a/Documentation/git-help.txt
+++ b/Documentation/git-help.txt
@@ -33,17 +33,21 @@ OPTIONS
option supersedes any other option.
-i|--info::
- Use the 'info' program to display the manual page, instead of
- the 'man' program that is used by default.
+ Display manual page for the command in the 'info' format. The
+ 'info' program will be used for that purpose.
-m|--man::
- Use the 'man' program to display the manual page. This may be
- used to override a value set in the 'help.format'
- configuration variable.
+ Display manual page for the command in the 'man' format. This
+ option may be used to override a value set in the
+ 'help.format' configuration variable.
++
+By default the 'man' program will be used to display the manual page,
+but the 'man.viewer' configuration variable may be used to choose
+other display programs (see below).
-w|--web::
- Use a web browser to display the HTML manual page, instead of
- the 'man' program that is used by default.
+ Display manual page for the command in the 'web' (HTML)
+ format. A web browser will be used for that purpose.
+
The web browser can be specified using the configuration variable
'help.browser', or 'web.browser' if the former is not set. If none of
@@ -54,6 +58,9 @@ linkgit:git-web--browse[1] for more information about this.
CONFIGURATION VARIABLES
-----------------------
+help.format
+~~~~~~~~~~~
+
If no command line option is passed, the 'help.format' configuration
variable will be checked. The following values are supported for this
variable; they make 'git-help' behave as their corresponding command
@@ -61,15 +68,47 @@ line option:
* "man" corresponds to '-m|--man',
* "info" corresponds to '-i|--info',
-* "web" or "html" correspond to '-w|--web',
+* "web" or "html" correspond to '-w|--web'.
+
+help.browser, web.browser and browser.<tool>.path
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The 'help.browser', 'web.browser' and 'browser.<tool>.path' will also
be checked if the 'web' format is chosen (either by command line
option or configuration variable). See '-w|--web' in the OPTIONS
section above and linkgit:git-web--browse[1].
-Note that these configuration variables should probably be set using
-the '--global' flag, for example like this:
+man.viewer
+~~~~~~~~~~
+
+The 'man.viewer' config variable will be checked if the 'man' format
+is chosen. Only the following values are currently supported:
+
+* "man": use the 'man' program as usual,
+* "woman": use 'emacsclient' to launch the "woman" mode in emacs
+(this only works starting with emacsclient versions 22),
+* "konqueror": use a man KIO slave in konqueror.
+
+Multiple values may be given to this configuration variable. Their
+corresponding programs will be tried in the order listed in the
+configuration file.
+
+For example, this configuration:
+
+ [man]
+ viewer = konqueror
+ viewer = woman
+
+will try to use konqueror first. But this may fail (for example if
+DISPLAY is not set) and in that case emacs' woman mode will be tried.
+
+If everything fails the 'man' program will be tried anyway.
+
+Note about git config --global
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Note that all these configuration variables should probably be set
+using the '--global' flag, for example like this:
------------------------------------------------
$ git config --global help.format web
diff --git a/help.c b/help.c
index e57a50ed5..ecaca770d 100644
--- a/help.c
+++ b/help.c
@@ -8,6 +8,12 @@
#include "exec_cmd.h"
#include "common-cmds.h"
#include "parse-options.h"
+#include "run-command.h"
+
+static struct man_viewer_list {
+ void (*exec)(const char *);
+ struct man_viewer_list *next;
+} *man_viewer_list;
enum help_format {
HELP_FORMAT_MAN,
@@ -42,6 +48,102 @@ static enum help_format parse_help_format(const char *format)
die("unrecognized help format '%s'", format);
}
+static int check_emacsclient_version(void)
+{
+ struct strbuf buffer = STRBUF_INIT;
+ struct child_process ec_process;
+ const char *argv_ec[] = { "emacsclient", "--version", NULL };
+ int version;
+
+ /* emacsclient prints its version number on stderr */
+ memset(&ec_process, 0, sizeof(ec_process));
+ ec_process.argv = argv_ec;
+ ec_process.err = -1;
+ ec_process.stdout_to_stderr = 1;
+ if (start_command(&ec_process)) {
+ fprintf(stderr, "Failed to start emacsclient.\n");
+ return -1;
+ }
+ strbuf_read(&buffer, ec_process.err, 20);
+ close(ec_process.err);
+
+ /*
+ * Don't bother checking return value, because "emacsclient --version"
+ * seems to always exits with code 1.
+ */
+ finish_command(&ec_process);
+
+ if (prefixcmp(buffer.buf, "emacsclient")) {
+ fprintf(stderr, "Failed to parse emacsclient version.\n");
+ strbuf_release(&buffer);
+ return -1;
+ }
+
+ strbuf_remove(&buffer, 0, strlen("emacsclient"));
+ version = atoi(buffer.buf);
+
+ if (version < 22) {
+ fprintf(stderr,
+ "emacsclient version '%d' too old (< 22).\n",
+ version);
+ strbuf_release(&buffer);
+ return -1;
+ }
+
+ strbuf_release(&buffer);
+ return 0;
+}
+
+static void exec_woman_emacs(const char *page)
+{
+ if (!check_emacsclient_version()) {
+ /* This works only with emacsclient version >= 22. */
+ struct strbuf man_page = STRBUF_INIT;
+ strbuf_addf(&man_page, "(woman \"%s\")", page);
+ execlp("emacsclient", "emacsclient", "-e", man_page.buf, NULL);
+ }
+}
+
+static void exec_man_konqueror(const char *page)
+{
+ const char *display = getenv("DISPLAY");
+ if (display && *display) {
+ struct strbuf man_page = STRBUF_INIT;
+ strbuf_addf(&man_page, "man:%s(1)", page);
+ execlp("kfmclient", "kfmclient", "newTab", man_page.buf, NULL);
+ }
+}
+
+static void exec_man_man(const char *page)
+{
+ execlp("man", "man", page, NULL);
+}
+
+static void do_add_man_viewer(void (*exec)(const char *))
+{
+ struct man_viewer_list **p = &man_viewer_list;
+
+ while (*p)
+ p = &((*p)->next);
+ *p = xmalloc(sizeof(**p));
+ (*p)->next = NULL;
+ (*p)->exec = exec;
+}
+
+static int add_man_viewer(const char *value)
+{
+ if (!strcasecmp(value, "man"))
+ do_add_man_viewer(exec_man_man);
+ else if (!strcasecmp(value, "woman"))
+ do_add_man_viewer(exec_woman_emacs);
+ else if (!strcasecmp(value, "konqueror"))
+ do_add_man_viewer(exec_man_konqueror);
+ else
+ warning("'%s': unsupported man viewer.", value);
+
+ return 0;
+}
+
static int git_help_config(const char *var, const char *value)
{
if (!strcmp(var, "help.format")) {
@@ -50,6 +152,11 @@ static int git_help_config(const char *var, const char *value)
help_format = parse_help_format(value);
return 0;
}
+ if (!strcmp(var, "man.viewer")) {
+ if (!value)
+ return config_error_nonbool(var);
+ return add_man_viewer(value);
+ }
return git_default_config(var, value);
}
@@ -347,9 +454,16 @@ static void setup_man_path(void)
static void show_man_page(const char *git_cmd)
{
+ struct man_viewer_list *viewer;
const char *page = cmd_to_page(git_cmd);
+
setup_man_path();
- execlp("man", "man", page, NULL);
+ for (viewer = man_viewer_list; viewer; viewer = viewer->next)
+ {
+ viewer->exec(page); /* will return when unable */
+ }
+ exec_man_man(page);
+ die("no man viewer handled the request");
}
static void show_info_page(const char *git_cmd)