| 1 | ## oils_failures_allowed: 1
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| 2 | ## compare_shells: bash dash mksh zsh
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| 3 |
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| 4 | #### Lazy Evaluation of Alternative
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| 5 | i=0
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| 6 | x=x
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| 7 | echo ${x:-$((i++))}
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| 8 | echo $i
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| 9 | echo ${undefined:-$((i++))}
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| 10 | echo $i # i is one because the alternative was only evaluated once
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| 11 | ## status: 0
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| 12 | ## stdout-json: "x\n0\n0\n1\n"
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| 13 | ## N-I dash status: 2
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| 14 | ## N-I dash stdout-json: "x\n0\n"
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| 15 |
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| 16 | #### Default value when empty
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| 17 | empty=''
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| 18 | echo ${empty:-is empty}
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| 19 | ## stdout: is empty
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| 20 |
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| 21 | #### Default value when unset
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| 22 | echo ${unset-is unset}
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| 23 | ## stdout: is unset
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| 24 |
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| 25 | #### Unquoted with array as default value
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| 26 | set -- '1 2' '3 4'
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| 27 | argv.py X${unset=x"$@"x}X
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| 28 | argv.py X${unset=x$@x}X # If you want OSH to split, write this
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| 29 | # osh
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| 30 | ## STDOUT:
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| 31 | ['Xx1', '2', '3', '4xX']
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| 32 | ['Xx1', '2', '3', '4xX']
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| 33 | ## END
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| 34 | ## OK osh STDOUT:
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| 35 | ['Xx1 2', '3 4xX']
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| 36 | ['Xx1', '2', '3', '4xX']
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| 37 | ## END
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| 38 | ## OK zsh STDOUT:
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| 39 | ['Xx1 2 3 4xX']
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| 40 | ['Xx1 2 3 4xX']
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| 41 | ## END
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| 42 |
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| 43 | #### Quoted with array as default value
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| 44 | set -- '1 2' '3 4'
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| 45 | argv.py "X${unset=x"$@"x}X"
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| 46 | argv.py "X${unset=x$@x}X" # OSH is the same here
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| 47 | ## STDOUT:
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| 48 | ['Xx1 2 3 4xX']
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| 49 | ['Xx1 2 3 4xX']
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| 50 | ## END
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| 51 | ## BUG bash STDOUT:
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| 52 | ['Xx1', '2', '3', '4xX']
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| 53 | ['Xx1 2 3 4xX']
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| 54 | ## END
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| 55 | ## OK osh STDOUT:
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| 56 | ['Xx1 2', '3 4xX']
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| 57 | ['Xx1 2 3 4xX']
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| 58 | ## END
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| 59 |
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| 60 | #### Assign default with array
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| 61 | set -- '1 2' '3 4'
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| 62 | argv.py X${unset=x"$@"x}X
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| 63 | argv.py "$unset"
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| 64 | ## STDOUT:
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| 65 | ['Xx1', '2', '3', '4xX']
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| 66 | ['x1 2 3 4x']
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| 67 | ## END
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| 68 | ## OK osh STDOUT:
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| 69 | ['Xx1 2', '3 4xX']
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| 70 | ['x1 2 3 4x']
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| 71 | ## END
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| 72 | ## OK zsh STDOUT:
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| 73 | ['Xx1 2 3 4xX']
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| 74 | ['x1 2 3 4x']
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| 75 | ## END
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| 76 |
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| 77 | #### Assign default value when empty
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| 78 | empty=''
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| 79 | ${empty:=is empty}
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| 80 | echo $empty
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| 81 | ## stdout: is empty
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| 82 |
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| 83 | #### Assign default value when unset
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| 84 | ${unset=is unset}
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| 85 | echo $unset
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| 86 | ## stdout: is unset
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| 87 |
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| 88 | #### ${v:+foo} Alternative value when empty
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| 89 | v=foo
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| 90 | empty=''
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| 91 | echo ${v:+v is not empty} ${empty:+is not empty}
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| 92 | ## stdout: v is not empty
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| 93 |
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| 94 | #### ${v+foo} Alternative value when unset
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| 95 | v=foo
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| 96 | echo ${v+v is not unset} ${unset:+is not unset}
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| 97 | ## stdout: v is not unset
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| 98 |
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| 99 | #### "${x+foo}" quoted (regression)
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| 100 | # Python's configure caught this
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| 101 | argv.py "${with_icc+set}" = set
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| 102 | ## STDOUT:
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| 103 | ['', '=', 'set']
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| 104 | ## END
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| 105 |
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| 106 | #### ${s+foo} and ${s:+foo} when set -u
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| 107 | set -u
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| 108 | v=v
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| 109 | echo v=${v:+foo}
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| 110 | echo v=${v+foo}
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| 111 | unset v
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| 112 | echo v=${v:+foo}
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| 113 | echo v=${v+foo}
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| 114 | ## STDOUT:
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| 115 | v=foo
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| 116 | v=foo
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| 117 | v=
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| 118 | v=
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| 119 | ## END
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| 120 |
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| 121 | #### "${array[@]} with set -u (bash is outlier)
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| 122 | case $SH in dash) exit ;; esac
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| 123 |
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| 124 | set -u
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| 125 |
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| 126 | typeset -a empty
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| 127 | empty=()
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| 128 |
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| 129 | echo empty /"${empty[@]}"/
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| 130 | echo undefined /"${undefined[@]}"/
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| 131 |
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| 132 | ## status: 1
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| 133 | ## STDOUT:
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| 134 | empty //
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| 135 | ## END
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| 136 |
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| 137 | ## BUG bash status: 0
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| 138 | ## BUG bash STDOUT:
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| 139 | empty //
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| 140 | undefined //
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| 141 | ## END
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| 142 |
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| 143 | # empty array is unset in mksh
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| 144 | ## BUG mksh status: 1
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| 145 | ## BUG mksh STDOUT:
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| 146 | ## END
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| 147 |
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| 148 | ## N-I dash status: 0
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| 149 | ## N-I dash STDOUT:
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| 150 | ## END
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| 151 |
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| 152 |
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| 153 | #### "${undefined[@]+foo}" and "${undefined[@]:+foo}", with set -u
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| 154 | case $SH in dash) exit ;; esac
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| 155 |
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| 156 | set -u
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| 157 |
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| 158 | echo plus /"${array[@]+foo}"/
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| 159 | echo plus colon /"${array[@]:+foo}"/
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| 160 |
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| 161 | ## STDOUT:
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| 162 | plus //
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| 163 | plus colon //
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| 164 | ## END
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| 165 |
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| 166 | ## N-I dash STDOUT:
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| 167 | ## END
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| 168 |
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| 169 | #### "${a[@]+foo}" and "${a[@]:+foo}" - operators are equivalent on arrays?
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| 170 |
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| 171 | case $SH in dash) exit ;; esac
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| 172 |
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| 173 | echo '+ ' /"${array[@]+foo}"/
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| 174 | echo '+:' /"${array[@]:+foo}"/
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| 175 | echo
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| 176 |
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| 177 | typeset -a array
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| 178 | array=()
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| 179 |
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| 180 | echo '+ ' /"${array[@]+foo}"/
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| 181 | echo '+:' /"${array[@]:+foo}"/
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| 182 | echo
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| 183 |
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| 184 | array=('')
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| 185 |
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| 186 | echo '+ ' /"${array[@]+foo}"/
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| 187 | echo '+:' /"${array[@]:+foo}"/
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| 188 | echo
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| 189 |
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| 190 | array=(spam eggs)
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| 191 |
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| 192 | echo '+ ' /"${array[@]+foo}"/
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| 193 | echo '+:' /"${array[@]:+foo}"/
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| 194 | echo
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| 195 |
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| 196 |
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| 197 | ## STDOUT:
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| 198 | + //
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| 199 | +: //
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| 200 |
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| 201 | + //
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| 202 | +: //
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| 203 |
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| 204 | + /foo/
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| 205 | +: /foo/
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| 206 |
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| 207 | + /foo/
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| 208 | +: /foo/
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| 209 |
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| 210 | ## END
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| 211 |
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| 212 | ## BUG mksh STDOUT:
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| 213 | + //
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| 214 | +: //
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| 215 |
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| 216 | + //
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| 217 | +: //
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| 218 |
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| 219 | + /foo/
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| 220 | +: //
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| 221 |
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| 222 | + /foo/
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| 223 | +: /foo/
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| 224 |
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| 225 | ## END
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| 226 |
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| 227 | ## BUG zsh STDOUT:
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| 228 | + //
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| 229 | +: //
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| 230 |
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| 231 | + /foo/
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| 232 | +: //
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| 233 |
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| 234 | + /foo/
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| 235 | +: /foo/
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| 236 |
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| 237 | + /foo/
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| 238 | +: /foo/
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| 239 |
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| 240 | ## END
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| 241 |
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| 242 | ## N-I dash STDOUT:
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| 243 | ## END
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| 244 |
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| 245 |
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| 246 |
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| 247 | #### Nix idiom ${!hooksSlice+"${!hooksSlice}"} - was workaround for obsolete bash 4.3 bug
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| 248 |
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| 249 | case $SH in dash|mksh|zsh) exit ;; esac
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| 250 |
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| 251 | # https://oilshell.zulipchat.com/#narrow/stream/307442-nix/topic/Replacing.20bash.20with.20osh.20in.20Nixpkgs.20stdenv
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| 252 |
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| 253 | argv.py ${!hooksSlice+"${!hooksSlice}"}
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| 254 |
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| 255 | declare -a hookSlice=()
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| 256 |
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| 257 | argv.py ${!hooksSlice+"${!hooksSlice}"}
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| 258 |
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| 259 | foo=42
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| 260 | bar=43
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| 261 |
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| 262 | declare -a hookSlice=(foo bar spam eggs)
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| 263 |
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| 264 | argv.py ${!hooksSlice+"${!hooksSlice}"}
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| 265 |
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| 266 | ## STDOUT:
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| 267 | []
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| 268 | []
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| 269 | []
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| 270 | ## END
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| 271 |
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| 272 | ## OK dash/mksh/zsh STDOUT:
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| 273 | ## END
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| 274 |
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| 275 | #### ${v-foo} and ${v:-foo} when set -u
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| 276 | set -u
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| 277 | v=v
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| 278 | echo v=${v:-foo}
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| 279 | echo v=${v-foo}
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| 280 | unset v
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| 281 | echo v=${v:-foo}
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| 282 | echo v=${v-foo}
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| 283 | ## STDOUT:
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| 284 | v=v
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| 285 | v=v
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| 286 | v=foo
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| 287 | v=foo
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| 288 | ## END
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| 289 |
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| 290 | #### array and - and +
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| 291 | case $SH in (dash) exit ;; esac
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| 292 |
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| 293 | shopt -s compat_array # to refer to array as scalar
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| 294 |
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| 295 | empty=()
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| 296 | a1=('')
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| 297 | a2=('' x)
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| 298 | a3=(3 4)
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| 299 | echo empty=${empty[@]-minus}
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| 300 | echo a1=${a1[@]-minus}
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| 301 | echo a1[0]=${a1[0]-minus}
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| 302 | echo a2=${a2[@]-minus}
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| 303 | echo a3=${a3[@]-minus}
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| 304 | echo ---
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| 305 |
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| 306 | echo empty=${empty[@]+plus}
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| 307 | echo a1=${a1[@]+plus}
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| 308 | echo a1[0]=${a1[0]+plus}
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| 309 | echo a2=${a2[@]+plus}
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| 310 | echo a3=${a3[@]+plus}
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| 311 | echo ---
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| 312 |
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| 313 | echo empty=${empty+plus}
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| 314 | echo a1=${a1+plus}
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| 315 | echo a2=${a2+plus}
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| 316 | echo a3=${a3+plus}
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| 317 | echo ---
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| 318 |
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| 319 | # Test quoted arrays too
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| 320 | argv.py "${empty[@]-minus}"
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| 321 | argv.py "${empty[@]+plus}"
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| 322 | argv.py "${a1[@]-minus}"
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| 323 | argv.py "${a1[@]+plus}"
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| 324 | argv.py "${a1[0]-minus}"
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| 325 | argv.py "${a1[0]+plus}"
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| 326 | argv.py "${a2[@]-minus}"
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| 327 | argv.py "${a2[@]+plus}"
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| 328 | argv.py "${a3[@]-minus}"
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| 329 | argv.py "${a3[@]+plus}"
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| 330 |
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| 331 | ## STDOUT:
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| 332 | empty=minus
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| 333 | a1=
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| 334 | a1[0]=
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| 335 | a2= x
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| 336 | a3=3 4
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| 337 | ---
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| 338 | empty=
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| 339 | a1=plus
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| 340 | a1[0]=plus
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| 341 | a2=plus
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| 342 | a3=plus
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| 343 | ---
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| 344 | empty=
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| 345 | a1=plus
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| 346 | a2=plus
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| 347 | a3=plus
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| 348 | ---
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| 349 | ['minus']
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| 350 | []
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| 351 | ['']
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| 352 | ['plus']
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| 353 | ['']
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| 354 | ['plus']
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| 355 | ['', 'x']
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| 356 | ['plus']
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| 357 | ['3', '4']
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| 358 | ['plus']
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| 359 | ## END
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| 360 | ## N-I dash stdout-json: ""
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| 361 | ## N-I zsh stdout-json: "empty=\na1=\n"
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| 362 | ## N-I zsh status: 1
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| 363 |
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| 364 | #### $@ and - and +
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| 365 | echo argv=${@-minus}
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| 366 | echo argv=${@+plus}
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| 367 | echo argv=${@:-minus}
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| 368 | echo argv=${@:+plus}
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| 369 | ## STDOUT:
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| 370 | argv=minus
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| 371 | argv=
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| 372 | argv=minus
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| 373 | argv=
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| 374 | ## END
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| 375 | ## BUG dash/zsh STDOUT:
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| 376 | argv=
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| 377 | argv=plus
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| 378 | argv=minus
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| 379 | argv=
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| 380 | ## END
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| 381 |
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| 382 | #### assoc array and - and +
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| 383 | case $SH in (dash|mksh) exit ;; esac
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| 384 |
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| 385 | declare -A empty=()
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| 386 | declare -A assoc=(['k']=v)
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| 387 |
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| 388 | echo empty=${empty[@]-minus}
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| 389 | echo empty=${empty[@]+plus}
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| 390 | echo assoc=${assoc[@]-minus}
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| 391 | echo assoc=${assoc[@]+plus}
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| 392 |
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| 393 | echo ---
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| 394 | echo empty=${empty[@]:-minus}
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| 395 | echo empty=${empty[@]:+plus}
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| 396 | echo assoc=${assoc[@]:-minus}
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| 397 | echo assoc=${assoc[@]:+plus}
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| 398 | ## STDOUT:
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| 399 | empty=minus
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| 400 | empty=
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| 401 | assoc=v
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| 402 | assoc=plus
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| 403 | ---
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| 404 | empty=minus
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| 405 | empty=
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| 406 | assoc=v
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| 407 | assoc=plus
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| 408 | ## END
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| 409 |
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| 410 | ## BUG zsh STDOUT:
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| 411 | empty=
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| 412 | empty=plus
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| 413 | assoc=minus
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| 414 | assoc=
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| 415 | ---
|
| 416 | empty=minus
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| 417 | empty=
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| 418 | assoc=minus
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| 419 | assoc=
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| 420 | ## END
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| 421 |
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| 422 | ## N-I dash/mksh STDOUT:
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| 423 | ## END
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| 424 |
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| 425 |
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| 426 | #### Error when empty
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| 427 | empty=''
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| 428 | echo ${empty:?'is em'pty} # test eval of error
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| 429 | echo should not get here
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| 430 | ## stdout-json: ""
|
| 431 | ## status: 1
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| 432 | ## OK dash status: 2
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| 433 |
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| 434 | #### Error when unset
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| 435 | echo ${unset?is empty}
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| 436 | echo should not get here
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| 437 | ## stdout-json: ""
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| 438 | ## status: 1
|
| 439 | ## OK dash status: 2
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| 440 |
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| 441 | #### Error when unset
|
| 442 | v=foo
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| 443 | echo ${v+v is not unset} ${unset:+is not unset}
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| 444 | ## stdout: v is not unset
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| 445 |
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| 446 | #### ${var=x} dynamic scope
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| 447 | f() { : "${hello:=x}"; echo $hello; }
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| 448 | f
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| 449 | echo hello=$hello
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| 450 |
|
| 451 | f() { hello=x; }
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| 452 | f
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| 453 | echo hello=$hello
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| 454 | ## STDOUT:
|
| 455 | x
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| 456 | hello=x
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| 457 | hello=x
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| 458 | ## END
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| 459 |
|
| 460 | #### array ${arr[0]=x}
|
| 461 | arr=()
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| 462 | echo ${#arr[@]}
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| 463 | : ${arr[0]=x}
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| 464 | echo ${#arr[@]}
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| 465 | ## STDOUT:
|
| 466 | 0
|
| 467 | 1
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| 468 | ## END
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| 469 | ## N-I dash status: 2
|
| 470 | ## N-I dash stdout-json: ""
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| 471 | ## N-I zsh status: 1
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| 472 | ## N-I zsh stdout-json: "0\n"
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| 473 |
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| 474 | #### assoc array ${arr["k"]=x}
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| 475 | # note: this also works in zsh
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| 476 |
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| 477 | declare -A arr=()
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| 478 | echo ${#arr[@]}
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| 479 | : ${arr['k']=x}
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| 480 | echo ${#arr[@]}
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| 481 | ## STDOUT:
|
| 482 | 0
|
| 483 | 1
|
| 484 | ## END
|
| 485 | ## N-I dash status: 2
|
| 486 | ## N-I dash stdout-json: ""
|
| 487 | ## N-I mksh status: 1
|
| 488 | ## N-I mksh stdout-json: ""
|
| 489 |
|
| 490 | #### "\z" as arg
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| 491 | echo "${undef-\$}"
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| 492 | echo "${undef-\(}"
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| 493 | echo "${undef-\z}"
|
| 494 | echo "${undef-\"}"
|
| 495 | echo "${undef-\`}"
|
| 496 | echo "${undef-\\}"
|
| 497 | ## STDOUT:
|
| 498 | $
|
| 499 | \(
|
| 500 | \z
|
| 501 | "
|
| 502 | `
|
| 503 | \
|
| 504 | ## END
|
| 505 | ## BUG yash STDOUT:
|
| 506 | $
|
| 507 | (
|
| 508 | z
|
| 509 | "
|
| 510 | `
|
| 511 | \
|
| 512 | ## END
|
| 513 |
|
| 514 | #### "\e" as arg
|
| 515 | echo "${undef-\e}"
|
| 516 | ## STDOUT:
|
| 517 | \e
|
| 518 | ## END
|
| 519 | ## BUG zsh/mksh stdout-repr: '\x1b\n'
|
| 520 | ## BUG yash stdout: e
|
| 521 |
|