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|
function help --description 'Show help for the fish shell'
# Declare variables to set correct scope
set -l fish_browser
set -l fish_browser_bg
set -l h syntax completion editor job-control todo bugs history killring help
set h $h color prompt title variables builtin-overview changes expand
set h $h expand-variable expand-home expand-brace expand-wildcard
set -l help_topics $h expand-command-substitution expand-process
# 'help -h' should launch 'help help'
if count $argv >/dev/null
switch $argv[1]
case -h --h --he --hel --help
__fish_print_help help
return 0
end
end
#
# Find a suitable browser for viewing the help pages. This is needed
# by the help function defined below.
#
set -l graphical_browsers htmlview x-www-browser firefox galeon mozilla konqueror epiphany opera netscape rekonq google-chrome chromium-browser
set -l text_browsers htmlview www-browser links elinks lynx w3m
if type -q "$BROWSER"
# User has manually set a preferred browser, so we respect that
set fish_browser $BROWSER
# If browser is known to be graphical, put into background
if contains -- $BROWSER $graphical_browsers
set fish_browser_bg 1
end
else
# Check for a text-based browser.
for i in $text_browsers
if type -q -f $i
set fish_browser $i
break
end
end
# If we are in a graphical environment, check if there is a graphical
# browser to use instead.
if test "$DISPLAY" -a \( "$XAUTHORITY" = "$HOME/.Xauthority" -o "$XAUTHORITY" = "" \)
for i in $graphical_browsers
if type -q -f $i
set fish_browser $i
set fish_browser_bg 1
break
end
end
end
# If the OS appears to be Windows (graphical), try to use cygstart
if type -q cygstart
set fish_browser cygstart
# If xdg-open is available, just use that
else if type -q xdg-open
set fish_browser xdg-open
end
# On OS X, we go through osascript by default
if test (uname) = Darwin
if type -q osascript
set fish_browser osascript
end
end
end
if test -z $fish_browser
printf (_ '%s: Could not find a web browser.\n') help
printf (_ 'Please set the variable $BROWSER to a suitable browser and try again.\n\n')
return 1
end
# In Cygwin, start the user-specified browser using cygstart
if type -q cygstart
if test $fish_browser != "cygstart"
# Escaped quotes are necessary to work with spaces in the path
# when the command is finally eval'd.
set fish_browser cygstart \"$fish_browser\"
end
end
set -l fish_help_item $argv[1]
switch "$fish_help_item"
case ""
set fish_help_page index.html
case "."
set fish_help_page "commands.html\#source"
case globbing
set fish_help_page "index.html\#expand"
case (__fish_print_commands)
set fish_help_page "commands.html\#$fish_help_item"
case $help_topics
set fish_help_page "index.html\#$fish_help_item"
case "*"
if type -q -f $fish_help_item
# Prefer to use fish's man pages, to avoid
# the annoying useless "builtin" man page bash
# installs on OS X
set -l man_arg "$__fish_datadir/man/man1/$fish_help_item.1"
if test -f "$man_arg"
man $man_arg
return
end
end
set fish_help_page "index.html"
end
set -l page_url
if test -f $__fish_help_dir/index.html
# Help is installed, use it
set page_url file://$__fish_help_dir/$fish_help_page
# In Cygwin, we need to convert the base help dir to a Windows path before converting it to a file URL
if type -q cygpath
set page_url file://(cygpath -m $__fish_help_dir)/$fish_help_page
end
else
# Go to the web. Only include one dot in the version string
set -l version_string (echo $FISH_VERSION| cut -d . -f 1,2)
set page_url http://fishshell.com/docs/$version_string/$fish_help_page
end
# OS X /usr/bin/open swallows fragments (anchors), so use osascript
# Eval is just a cheesy way of removing the hash escaping
if test "$fish_browser" = osascript
osascript -e 'open location "'(eval echo $page_url)'"'
return
end
if test $fish_browser_bg
switch $fish_browser
case 'htmlview' 'x-www-browser'
printf (_ 'help: Help is being displayed in your default browser.\n')
case '*'
printf (_ 'help: Help is being displayed in %s.\n') $fish_browser
end
eval "$fish_browser $page_url &"
else
eval $fish_browser $page_url
end
end
|
