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## compare_shells: dash bash-4.4 mksh
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# In this file:
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#
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# - strict_control-flow: break/continue at the top level should be fatal!
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#
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# Other tests:
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# - spec/errexit-strict: command subs inherit errexit
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# - TODO: does bash 4.4. use inherit_errexit?
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#
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# - spec/var-op-other tests strict_word-eval (negative indices and invalid
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# utf-8)
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# - hm I think these should be the default? compat-word-eval?
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#
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# - spec/arith tests strict_arith - invalid strings become 0
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# - OSH has a warning that can turn into an error. I think the error could
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# be the default (since this was a side effect of "ShellMathShock")
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# - strict_array: unimplemented.
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# - WAS undef[2]=x, but bash-completion relied on the associative array
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# version of that.
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# - TODO: It should disable decay_array EVERYWHERE except a specific case like:
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# - s="${a[*]}" # quoted, the unquoted ones glob in a command context
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# - spec/dbracket has array comparison relevant to the case below
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#
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# Most of those options could be compat-*.
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#
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# One that can't: strict_scope disables dynamic scope.
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shopt -s strict_arith
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## status: 0
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## N-I bash status: 1
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## N-I dash/mksh status: 127
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echo one
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. $REPO_ROOT/spec/testdata/return-helper.sh
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echo $?
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echo two
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## STDOUT:
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one
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return-helper.sh
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42
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two
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## END
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$SH $REPO_ROOT/spec/testdata/top-level-control-flow.sh
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## status: 0
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## STDOUT:
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SUBSHELL
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BREAK
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CONTINUE
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RETURN
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## OK bash STDOUT:
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SUBSHELL
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BREAK
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CONTINUE
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RETURN
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DONE
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## END
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$SH -o errexit $REPO_ROOT/spec/testdata/top-level-control-flow.sh
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## status: 2
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## OK bash status: 1
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## STDOUT:
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SUBSHELL
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## END
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shopt -s strict_control_flow || true
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echo break
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break
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echo hi
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## STDOUT:
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break
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## END
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## status: 1
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## N-I dash/bash/mksh STDOUT:
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break
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hi
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# END
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## N-I dash/bash/mksh status: 0
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return
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echo "status=$?"
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## stdout-json: ""
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## OK bash STDOUT:
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status=1
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## END
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# NOTE: bash and mksh both print warnings, but don't exit with an error.
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continue
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echo status=$?
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## stdout: status=0
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break
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echo status=$?
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## stdout: status=0
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x=''
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$x
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echo status=$?
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if $x; then
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echo VarSub
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fi
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if $(echo foo >/dev/null); then
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echo CommandSub
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fi
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if "$x"; then
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echo VarSub
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else
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echo VarSub FAILED
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fi
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if "$(echo foo >/dev/null)"; then
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echo CommandSub
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else
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echo CommandSub FAILED
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fi
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## STDOUT:
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status=0
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VarSub
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CommandSub
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VarSub FAILED
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CommandSub FAILED
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## END
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shopt -s strict_argv || true
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echo empty
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x=''
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$x
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echo status=$?
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## status: 1
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## STDOUT:
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empty
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## END
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## N-I dash/bash/mksh status: 0
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## N-I dash/bash/mksh STDOUT:
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empty
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status=0
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## END
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# NOTE: from spec/dbracket has a test case like this
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# sane-array should turn this ON.
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# bash and mksh allow this because of decay
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a=('a b' 'c d')
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b=('a' 'b' 'c' 'd')
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echo ${#a[@]}
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echo ${#b[@]}
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[[ "${a[@]}" == "${b[@]}" ]] && echo EQUAL
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shopt -s strict_array || true
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[[ "${a[@]}" == "${b[@]}" ]] && echo EQUAL
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## status: 1
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## STDOUT:
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2
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4
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EQUAL
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## END
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## OK bash/mksh status: 0
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## OK bash/mksh STDOUT:
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2
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4
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EQUAL
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EQUAL
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## END
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## N-I dash status: 2
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## N-I dash stdout-json: ""
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undef[2]=x
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undef[3]=y
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argv.py "${undef[@]}"
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## STDOUT:
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['x', 'y']
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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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shopt -u strict_arith || true
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undef[2]=x
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undef[3]=y
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x='bad'
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# bad gets coerced to zero, but this is part of the RECURSIVE arithmetic
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# behavior, which we want to disallow. Consider disallowing in OSH.
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undef[$x]=zzz
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argv.py "${undef[@]}"
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## STDOUT:
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['zzz', 'x', 'y']
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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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for i in 1 2; do
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eval # zero args
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echo status=$?
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eval echo one
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echo status=$?
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eval 'echo two'
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echo status=$?
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shopt -s simple_eval_builtin
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echo ---
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done
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## STDOUT:
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status=0
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one
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status=0
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two
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status=0
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---
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status=2
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status=2
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two
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status=0
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---
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## END
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## N-I dash/bash/mksh STDOUT:
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status=0
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one
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status=0
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two
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status=0
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---
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status=0
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one
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status=0
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two
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status=0
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---
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## END
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