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https://github.com/fish-shell/fish-shell
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ec939fb22f
With BSD man, "PAGER=vim man man | cat" hangs because [man](https://cgit.freebsd.org/src/tree/usr.bin/man/man.sh) wrongly calls the pager even though stdout is not a terminal. This hang manifests in places where we call apropos in a subshell, such as in "complete -Ccar". Let's work around this I guess. This should really be fixed upstream because it's a problem in every app that wants to display man pages but doesn't emulate a complete terminal. Weirdly, the Apple derivative of man.sh uses WHATISPAGER instead of MANPAGER. Closes #10820
53 lines
1.8 KiB
Fish
53 lines
1.8 KiB
Fish
if not type -q apropos
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function __fish_apropos
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end
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exit
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end
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# Check for macOS Catalina or above. This is Darwin 19.x or above. See unames reported here:
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# https://en.wikipedia.org/wiki/Darwin_(operating_system)
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set -l sysver (uname -sr | string match -r "(Darwin) (\d\d)"\.)
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if test $status -eq 0 -a (count $sysver) -eq 3
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and test $sysver[2] = Darwin -a $sysver[3] -ge 19
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and test -x /usr/libexec/makewhatis
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set -l dir
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if test -n "$XDG_CACHE_HOME"
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set dir $XDG_CACHE_HOME/fish
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else
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set dir (getconf DARWIN_USER_CACHE_DIR)"fish"
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end
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function __fish_apropos -V dir
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# macOS 10.15 "Catalina" has a read only filesystem where the whatis database should be.
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# The whatis database is non-existent, so apropos tries (and fails) to create it every time,
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# which can take seconds.
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#
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# Instead, we build a whatis database in the user cache directory
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# and override the MANPATH using that directory before we run `apropos`
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#
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# the cache is rebuilt once a week.
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set -l whatis $dir/whatis
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set -l max_age 600000 # like a week
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set -l age $max_age
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if test -f "$whatis"
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set age (path mtime -R -- $whatis)
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end
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MANPATH="$dir" MANPAGER=cat WHATISPAGER=cat apropos "$argv"
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if test $age -ge $max_age
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test -d "$dir" || mkdir -m 700 -p $dir
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/usr/libexec/makewhatis -o "$whatis" (/usr/bin/manpath | string split : | xargs realpath) >/dev/null 2>&1 </dev/null &
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disown $last_pid
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end
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end
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else
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function __fish_apropos
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# we only ever prefix match for completions. This also ensures results for bare apropos <TAB>
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# (apropos '' gives no results, but apropos '^' lists all manpages)
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MANPAGER=cat WHATISPAGER=cat apropos "$argv"
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end
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end
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