/usr/share/fish/functions/pushd.fish is in fish-common 2.4.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 | function pushd --description 'Push directory to stack'
if count $argv >/dev/null
# check for --help
switch $argv[1]
case -h --h --he --hel --help
__fish_print_help pushd
return 0
end
# emulate bash by checking if argument of form +n or -n
set -l rot_r
set -l rot_l
if string match -qr '^-[0-9]+$' -- $argv[1]
set rot_r (string sub -s 2 -- $argv[1])
else if string match -qr '^\+[0-9]+$' -- $argv[1]
set rot_l (string sub -s 2 -- $argv[1])
end
end
# emulate bash: an empty pushd should switch the top of dirs
if test (count $argv) -eq 0
# check that the stack isn't empty
if test (count $dirstack) -eq 0
echo "pushd: no other directory"
return 1
end
# get the top two values of the dirs stack ... the first is pwd
set -l top_dir (command pwd)
set -l next_dir $dirstack[1]
# alter the top of dirstack and move to directory
set -g dirstack[1] $top_dir
cd $next_dir
return
end
# emulate bash: check for rotations
if test -n "$rot_l" -o -n "$rot_r"
# grab the current stack
set -l stack (command pwd) $dirstack
# translate a right rotation to a left rotation
if test -n "$rot_r"
# check the rotation in range
if test $rot_r -ge (count $stack)
echo "pushd: -$rot_r: directory stack index out of range"
return 1
end
set rot_l (math (count $stack) - 1 - $rot_r)
end
# check the rotation in range
if test $rot_l -ge (count $stack)
echo "pushd: +$rot_l: directory stack index out of range"
return 1
else
# rotate stack unless rot_l is 0
if test $rot_l -gt 0
set stack $stack[(math $rot_l + 1)..(count $stack)] $stack[1..$rot_l]
end
# now reconstruct dirstack and change directory
set -g dirstack $stack[2..(count $stack)]
cd $stack[1]
end
# print the new stack
dirs
return
end
# argv[1] is a directory
set -g dirstack (command pwd) $dirstack
cd $argv[1]
end
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