hush: optional support for ${var:N:M} bashism
function old new delta expand_vars_to_list 1999 2183 +184 handle_dollar 682 623 -59 Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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46
shell/hush_test/hush-vars/param_expand_bash_substring.tests
Executable file
46
shell/hush_test/hush-vars/param_expand_bash_substring.tests
Executable file
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# do all of these in subshells since it's supposed to error out
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export var=0123456789
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# first try some invalid patterns
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"$THIS_SH" -c 'echo ${:}'
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"$THIS_SH" -c 'echo ${::}'
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"$THIS_SH" -c 'echo ${:1}'
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"$THIS_SH" -c 'echo ${::1}'
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#this also is not valid in bash, but we accept it:
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"$THIS_SH" -c 'echo ${var:}'
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# then some funky ones
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# UNFIXED BUG: this should work: "$THIS_SH" -c 'echo ${?:0}'
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# now some valid ones
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"$THIS_SH" -c 'set --; echo "1 =|${1}|"'
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"$THIS_SH" -c 'set --; echo "1:1 =|${1:1}|"'
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"$THIS_SH" -c 'set --; echo "1:1:2=|${1:1:2}|"'
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"$THIS_SH" -c 'set --; echo "1::2 =|${1::2}|"'
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"$THIS_SH" -c 'set -- 0123; echo "1 =|${1}|"'
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"$THIS_SH" -c 'set -- 0123; echo "1:1 =|${1:1}|"'
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"$THIS_SH" -c 'set -- 0123; echo "1:1:2=|${1:1:2}|"'
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"$THIS_SH" -c 'set -- 0123; echo "1::2 =|${1::2}|"'
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"$THIS_SH" -c 'unset f; echo "f =|$f|"'
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"$THIS_SH" -c 'unset f; echo "f:1 =|${f:1}|"'
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"$THIS_SH" -c 'unset f; echo "f:1:2=|${f:1:2}|"'
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"$THIS_SH" -c 'unset f; echo "f::2 =|${f::2}|"'
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"$THIS_SH" -c 'f=; echo "f =|$f|"'
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"$THIS_SH" -c 'f=; echo "f:1 =|${f:1}|"'
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"$THIS_SH" -c 'f=; echo "f:1:2=|${f:1:2}|"'
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"$THIS_SH" -c 'f=; echo "f::2 =|${f::2}|"'
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"$THIS_SH" -c 'f=a; echo "f =|$f|"'
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"$THIS_SH" -c 'f=a; echo "f:1 =|${f:1}|"'
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"$THIS_SH" -c 'f=a; echo "f:1:2=|${f:1:2}|"'
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"$THIS_SH" -c 'f=a; echo "f::2 =|${f::2}|"'
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"$THIS_SH" -c 'f=0123456789; echo "f =|$f|"'
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"$THIS_SH" -c 'f=0123456789; echo "f:1 =|${f:1}|"'
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"$THIS_SH" -c 'f=0123456789; echo "f:1:2=|${f:1:2}|"'
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"$THIS_SH" -c 'f=0123456789; echo "f::2 =|${f::2}|"'
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