| 1 | #### Turn off external binaries with shvar PATH='' {}
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| 2 | shopt --set parse_brace parse_proc
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| 3 |
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| 4 | echo hi > file
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| 5 |
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| 6 | # Note: this CACHES the lookup, so shvar has to clear cache when modifying it
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| 7 | cp -v file /tmp >&2
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| 8 | echo status=$?
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| 9 |
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| 10 | # TODO: implement this, and call it whenever shvar mutates PATH?
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| 11 | # what about when PATH is mutated? No leave it out for now.
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| 12 |
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| 13 | # hash -r # clear the cache, no longer necessary
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| 14 |
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| 15 | shvar PATH='' {
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| 16 | cp -v file /tmp
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| 17 | echo status=$?
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| 18 |
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| 19 | # this also doesn't work
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| 20 | command cp -v file /tmp
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| 21 | echo status=$?
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| 22 | }
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| 23 |
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| 24 | # Now it's available again
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| 25 | cp -v file /tmp >&2
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| 26 | echo status=$?
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| 27 |
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| 28 | ## STDOUT:
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| 29 | status=0
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| 30 | status=127
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| 31 | status=127
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| 32 | status=0
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| 33 | ## END
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| 34 |
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| 35 | #### More shvar PATH=''
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| 36 | shopt --set parse_brace command_sub_errexit parse_proc
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| 37 |
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| 38 | shvar PATH='' {
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| 39 | ( cp -v file /tmp >&2 )
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| 40 | echo status=$?
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| 41 |
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| 42 | forkwait {
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| 43 | cp -v file /tmp >&2
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| 44 | }
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| 45 | echo status=$?
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| 46 |
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| 47 | try {
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| 48 | true $(cp -v file /tmp >&2)
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| 49 | }
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| 50 | echo _status $_status
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| 51 | }
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| 52 |
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| 53 | ## STDOUT:
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| 54 | status=127
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| 55 | status=127
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| 56 | _status 127
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| 57 | ## END
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| 58 |
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| 59 |
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| 60 | #### builtins and externals not available in hay eval
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| 61 | shopt --set parse_brace
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| 62 | shopt --unset errexit
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| 63 |
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| 64 | hay define Package
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| 65 |
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| 66 | try {
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| 67 | hay eval :result {
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| 68 | Package foo {
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| 69 | /bin/ls
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| 70 | }
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| 71 | }
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| 72 | }
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| 73 | echo "status $_status"
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| 74 |
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| 75 | try {
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| 76 | hay eval :result {
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| 77 | cd /tmp
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| 78 | }
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| 79 | }
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| 80 | echo "status $_status"
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| 81 |
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| 82 | ## STDOUT:
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| 83 | status 127
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| 84 | status 127
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| 85 | ## END
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| 86 |
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| 87 | #### procs in hay eval
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| 88 | shopt --set parse_brace parse_at parse_proc
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| 89 |
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| 90 | hay define Package
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| 91 |
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| 92 | proc outside {
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| 93 | echo outside
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| 94 | Package OUT
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| 95 | }
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| 96 |
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| 97 | hay eval :result {
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| 98 | outside
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| 99 |
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| 100 | proc inside {
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| 101 | echo inside
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| 102 | }
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| 103 |
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| 104 | inside
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| 105 | }
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| 106 |
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| 107 | const args = result['children'][0]['args']
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| 108 | write --sep ' ' -- $[len(result['children'])] @args
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| 109 |
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| 110 | ## STDOUT:
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| 111 | outside
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| 112 | inside
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| 113 | 1 OUT
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| 114 | ## END
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| 115 |
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| 116 |
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| 117 | #### variables mutated within hay eval don't persist
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| 118 | shopt --set parse_brace
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| 119 |
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| 120 | hay define Package
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| 121 |
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| 122 | setvar x = 42
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| 123 |
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| 124 | hay eval :result {
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| 125 | Package foo
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| 126 |
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| 127 | setvar x = 1
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| 128 | }
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| 129 |
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| 130 | echo "x = $x"
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| 131 |
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| 132 | ## STDOUT:
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| 133 | x = 42
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| 134 | ## END
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| 135 |
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| 136 |
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| 137 |
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| 138 | #### hay at top level allows arbitrary commands
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| 139 | shopt --set parse_brace
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| 140 |
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| 141 | hay define Package
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| 142 |
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| 143 | Package $(seq 2) {
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| 144 | seq 3 4
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| 145 | }
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| 146 |
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| 147 | json write (_hay()) | jq '.children[0].args' > actual.txt
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| 148 |
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| 149 | diff -u - actual.txt <<EOF
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| 150 | [
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| 151 | "1",
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| 152 | "2"
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| 153 | ]
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| 154 | EOF
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| 155 |
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| 156 | hay eval :result {
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| 157 | echo inside
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| 158 | Package $(seq 2) {
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| 159 | seq 3 4
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| 160 | }
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| 161 | }
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| 162 |
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| 163 | ## status: 127
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| 164 | ## STDOUT:
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| 165 | 3
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| 166 | 4
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| 167 | inside
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| 168 | ## END
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| 169 |
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