git/git-help--browse.sh
Christian Couder 482cce8205 help: make 'git-help--browse' usable outside 'git-help'.
"git-help--browse" helper is to launch a browser of the user's choice
to view the HTML version of git documentation for a given command.  It
used to take the name of a command, convert it to the path of the
documentation by prefixing the directory name and appending the
".html" suffix, and start the browser on the path.

This updates the division of labor between the caller in help.c and
git-help--browser helper.  The helper is now responsible for launching
a browser of the user's choice on given URLs, and it is the caller's
responsibility to tell it the paths to documentation files.

This is in preparation to reuse the logic to choose user's preferred
browser in instaweb.

The helper had a provision for running it without any command name, in
which case it showed the toplevel "git(7)" documentation, but the
caller in help.c never makes such a call.  The helper now exits with a
usage message when no path is given.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2008-02-05 01:01:45 -08:00

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#!/bin/sh
#
# This program launch a web browser on the html page
# describing a git command.
#
# Copyright (c) 2007 Christian Couder
# Copyright (c) 2006 Theodore Y. Ts'o
#
# This file is heavily stolen from git-mergetool.sh, by
# Theodore Y. Ts'o (thanks) that is:
#
# Copyright (c) 2006 Theodore Y. Ts'o
#
# This file is licensed under the GPL v2, or a later version
# at the discretion of Junio C Hamano or any other official
# git maintainer.
#
USAGE='[--browser=browser|--tool=browser] url/file ...'
# This must be capable of running outside of git directory, so
# the vanilla git-sh-setup should not be used.
NONGIT_OK=Yes
. git-sh-setup
valid_tool() {
case "$1" in
firefox | iceweasel | konqueror | w3m | links | lynx | dillo)
;; # happy
*)
return 1
;;
esac
}
init_browser_path() {
browser_path=`git config browser.$1.path`
test -z "$browser_path" && browser_path=$1
}
while test $# != 0
do
case "$1" in
-b|--browser*|-t|--tool*)
case "$#,$1" in
*,*=*)
browser=`expr "z$1" : 'z-[^=]*=\(.*\)'`
;;
1,*)
usage ;;
*)
browser="$2"
shift ;;
esac
;;
--)
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
test $# = 0 && usage
if test -z "$browser"
then
for opt in "help.browser" "web.browser"
do
browser="`git config $opt`"
test -z "$browser" || break
done
if test -n "$browser" && ! valid_tool "$browser"; then
echo >&2 "git config option $opt set to unknown browser: $browser"
echo >&2 "Resetting to default..."
unset browser
fi
fi
if test -z "$browser" ; then
if test -n "$DISPLAY"; then
browser_candidates="firefox iceweasel konqueror w3m links lynx dillo"
if test "$KDE_FULL_SESSION" = "true"; then
browser_candidates="konqueror $browser_candidates"
fi
else
browser_candidates="w3m links lynx"
fi
for i in $browser_candidates; do
init_browser_path $i
if type "$browser_path" > /dev/null 2>&1; then
browser=$i
break
fi
done
test -z "$browser" && die "No known browser available."
else
valid_tool "$browser" || die "Unknown browser '$browser'."
init_browser_path "$browser"
if ! type "$browser_path" > /dev/null 2>&1; then
die "The browser $browser is not available as '$browser_path'."
fi
fi
case "$browser" in
firefox|iceweasel)
# Check version because firefox < 2.0 does not support "-new-tab".
vers=$(expr "$($browser_path -version)" : '.* \([0-9][0-9]*\)\..*')
NEWTAB='-new-tab'
test "$vers" -lt 2 && NEWTAB=''
nohup "$browser_path" $NEWTAB "$@" &
;;
konqueror)
case "$(basename "$browser_path")" in
konqueror)
# It's simpler to use kfmclient to open a new tab in konqueror.
browser_path="$(echo "$browser_path" | sed -e 's/konqueror$/kfmclient/')"
type "$browser_path" > /dev/null 2>&1 || die "No '$browser_path' found."
eval "$browser_path" newTab "$@"
;;
kfmclient)
eval "$browser_path" newTab "$@"
;;
*)
nohup "$browser_path" "$@" &
;;
esac
;;
w3m|links|lynx)
eval "$browser_path" "$@"
;;
dillo)
nohup "$browser_path" "$@" &
;;
esac