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## compare_shells: bash dash mksh zsh
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HOME=/home/bob
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a=~/src
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echo $a
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## stdout: /home/bob/src
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# dash fails here!
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# http://stackoverflow.com/questions/8441473/tilde-expansion-doesnt-work-when-i-logged-into-gui
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HOME=/home/bob
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readonly const=~/src
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echo $const
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## stdout: /home/bob/src
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## BUG dash stdout: ~/src
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HOME=/home/bob
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binding='const=~/src'
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readonly "$binding"
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echo $const
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## stdout: ~/src
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# bash and mksh mistakenly expand here!
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# bash fixes this in POSIX mode (gah).
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# http://lists.gnu.org/archive/html/bug-bash/2016-06/msg00001.html
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HOME=/home/bob
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echo x=~
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## stdout: x=~
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## BUG bash/mksh stdout: x=/home/bob
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HOME=$TMP
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echo hi > ~/tilde1.txt
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cat $HOME/tilde1.txt | wc -c
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## stdout: 3
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## status: 0
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echo ~nonexistent
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## stdout: ~nonexistent
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# zsh doesn't like nonexistent
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## OK zsh stdout-json: ""
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## OK zsh status: 1
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HOME=/home/bar
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echo ${undef:-~}
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echo ${HOME:+~/z}
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echo "${undef:-~}"
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echo ${undef:-"~"}
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## STDOUT:
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/home/bar
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/home/bar/z
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~
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~
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## END
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HOME=/home/bar
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x=~
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echo ${x//~/~root}
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# gah there is some expansion, what the hell
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echo ${HOME//~/~root}
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x=[$HOME]
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echo ${x//~/~root}
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## STDOUT:
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/root
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/root
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[/root]
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## END
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## N-I dash status: 2
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## N-I dash stdout-json: ""
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HOME=/home/bar
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x=foo:~
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echo $x
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echo "$x" # quotes don't matter, the expansion happens on assignment?
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x='foo:~'
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echo $x
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x=foo:~, # comma ruins it, must be /
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echo $x
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x=~:foo
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echo $x
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# no tilde expansion here
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echo foo:~
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## STDOUT:
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foo:/home/bar
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foo:/home/bar
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foo:~
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foo:~,
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/home/bar:foo
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foo:~
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## END
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case $SH in (dash|zsh) exit ;; esac
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HOME=/home/bar
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declare -a a
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a[0]=foo:~
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echo ${a[0]}
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declare -A A
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A['x']=foo:~
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echo ${A['x']}
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## STDOUT:
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foo:/home/bar
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foo:/home/bar
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## END
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## N-I dash/zsh stdout-json: ""
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HOME=/home/bar
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f() {
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local x=foo:~
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echo $x
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}
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f
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## STDOUT:
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foo:/home/bar
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## END
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## BUG dash STDOUT:
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foo:~
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## END
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HOME=/home/bar
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x=~:${undef-~:~}
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echo $x
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# Most shells agree on a different behavior, but with the OSH parsing model,
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# it's easier to agree with yash. bash disagrees in a different way
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## STDOUT:
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/home/bar:/home/bar:/home/bar
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## END
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## OK osh/yash STDOUT:
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/home/bar:~:~
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## END
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echo ~nonexistent
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shopt -s strict_tilde
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echo ~nonexistent
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echo status=$?
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## status: 1
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## STDOUT:
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~nonexistent
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## END
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## N-I bash/dash/mksh status: 0
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## N-I bash/dash/mksh STDOUT:
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~nonexistent
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~nonexistent
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status=0
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## END
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## OK zsh stdout-json: ""
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HOME=/home/bar
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xx=~ env | grep xx=
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# Does it respect the colon rule too?
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xx=~root:~:~ env | grep xx=
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## STDOUT:
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xx=/home/bar
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xx=/root:/home/bar:/home/bar
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## END
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