| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Usage:
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| 4 | # ./16-errexit.sh <function name>
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| 5 |
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| 6 | set -o nounset
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| 7 | set -o pipefail
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| 8 | set -o errexit
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| 9 |
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| 10 | fail() {
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| 11 | echo FAIL
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| 12 | false
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| 13 | }
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| 14 |
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| 15 | ok() {
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| 16 | echo OK
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| 17 | true
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| 18 | }
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| 19 |
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| 20 | _func() {
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| 21 | fail
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| 22 | ok
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| 23 | }
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| 24 |
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| 25 | # Hm this is behavior is odd. Usually errexit stops at first failed command.
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| 26 | # || suppresses this functions and blocks!
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| 27 | #
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| 28 | # I guess it is sort of like "if { grep foo; grep bar } ?
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| 29 |
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| 30 | test-func-or() {
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| 31 | _func || echo "Test function FAILED"
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| 32 |
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| 33 | echo DONE # We get here
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| 34 | }
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| 35 |
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| 36 | test-brace-or() {
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| 37 | { fail
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| 38 | ok
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| 39 | } || {
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| 40 | echo "Test block FAILED"
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| 41 | }
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| 42 |
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| 43 | echo DONE
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| 44 | }
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| 45 |
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| 46 | test-func-if() {
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| 47 | if _func; then
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| 48 | echo THEN # shouldn't succeed!
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| 49 | else
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| 50 | echo ELSE
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| 51 | fi
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| 52 |
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| 53 | echo DONE
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| 54 | }
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| 55 |
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| 56 | test-brace-if() {
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| 57 | if { fail; ok; }; then
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| 58 | echo THEN # shouldn't succeed!
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| 59 | else
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| 60 | echo ELSE
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| 61 | fi
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| 62 |
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| 63 | echo DONE
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| 64 | }
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| 65 |
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| 66 | # This behaves as expected
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| 67 | test-func-pipe() {
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| 68 | _func | tee /dev/null
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| 69 | echo PIPE
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| 70 | }
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| 71 |
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| 72 | test-brace-pipe() {
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| 73 | { fail; ok; } | tee /dev/null
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| 74 | echo PIPE
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| 75 | }
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| 76 |
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| 77 | # We get ELSE
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| 78 | test-fail-if() {
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| 79 | if fail; then
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| 80 | echo THEN
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| 81 | else
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| 82 | echo ELSE
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| 83 | fi
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| 84 |
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| 85 | echo DONE
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| 86 | }
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| 87 |
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| 88 | # We get ELSE
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| 89 | test-fail-or() {
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| 90 | fail || echo FAILED
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| 91 |
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| 92 | echo DONE
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| 93 | }
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| 94 |
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| 95 | succeed() {
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| 96 | return 0
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| 97 | }
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| 98 |
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| 99 | fail() {
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| 100 | return 1
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| 101 | }
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| 102 |
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| 103 | test-func-with-and() {
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| 104 | succeed && echo "OK 1"
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| 105 | fail && echo "OK 2" # Swallos the error because of errexit, not good!
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| 106 | succeed && echo "OK 3"
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| 107 | }
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| 108 |
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| 109 | all() {
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| 110 | compgen -A function | egrep '^test-' | while read func; do
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| 111 | echo
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| 112 | echo "--- $func ---"
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| 113 | echo
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| 114 | set +o errexit
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| 115 | $0 $func
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| 116 | echo status=$?
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| 117 | set -o errexit
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| 118 | done
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| 119 | }
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| 120 |
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| 121 | "$@"
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