diff options
| -rw-r--r-- | help.c | 81 |
1 files changed, 80 insertions, 1 deletions
@@ -8,6 +8,9 @@ #include "exec_cmd.h" #include "common-cmds.h" #include "parse-options.h" +#include "run-command.h" + +static const char *man_viewer; enum help_format { HELP_FORMAT_MAN, @@ -50,6 +53,8 @@ static int git_help_config(const char *var, const char *value) help_format = parse_help_format(value); return 0; } + if (!strcmp(var, "man.viewer")) + return git_config_string(&man_viewer, var, value); return git_default_config(var, value); } @@ -345,11 +350,85 @@ static void setup_man_path(void) strbuf_release(&new_path); } +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); + } else + execlp("man", "man", page, 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); + } else + execlp("man", "man", page, NULL); +} + static void show_man_page(const char *git_cmd) { const char *page = cmd_to_page(git_cmd); setup_man_path(); - execlp("man", "man", page, NULL); + if (!man_viewer || !strcmp(man_viewer, "man")) + execlp("man", "man", page, NULL); + if (!strcmp(man_viewer, "woman")) + exec_woman_emacs(page); + if (!strcmp(man_viewer, "konqueror")) + exec_man_konqueror(page); + die("'%s': unsupported man viewer.", man_viewer); } static void show_info_page(const char *git_cmd) |