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# Oil Blocks |
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|
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|
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#### cd with block |
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shopt -s oil:all |
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# OLDPWD is NOT defined |
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cd / { echo $PWD; echo OLDPWD=${OLDPWD:-} }; echo done |
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echo $(basename $PWD) # restored |
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cd /tmp { |
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write PWD=$PWD |
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write --sep ' ' pwd builtin: $(pwd) |
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} |
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echo $(basename $PWD) # restored |
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## STDOUT: |
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/ |
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OLDPWD= |
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done |
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oil-blocks.test.sh |
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PWD=/tmp |
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pwd builtin: /tmp |
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oil-blocks.test.sh |
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## END |
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|
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#### cd with block: fatal error in block |
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shopt -s oil:all |
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cd / { |
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echo one |
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false |
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echo two |
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} |
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## status: 1 |
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## STDOUT: |
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one |
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## END |
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|
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|
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#### cd with block: return in block |
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shopt -s oil:all |
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f() { |
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cd / { |
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echo one |
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return |
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echo two |
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} |
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echo 'end func' |
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} |
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f |
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## STDOUT: |
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one |
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end func |
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## END |
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|
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#### cd with block: break in block |
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shopt -s oil:all |
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f() { |
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cd / { |
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echo one |
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for i in 1 2; do |
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echo $i |
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break # break out of loop |
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done |
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|
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break # break out of block isn't valid |
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echo two |
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} |
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echo end func |
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} |
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f |
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## status: 1 |
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## STDOUT: |
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one |
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1 |
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## END |
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|
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#### cd with block exits with status 0 |
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shopt -s oil:all |
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cd / { |
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echo block |
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|
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# This return value is ignored. |
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# Or maybe this should be a runtime error? |
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return 1 |
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} |
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echo status=$? |
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## STDOUT: |
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block |
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status=0 |
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## END |
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|
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#### block doesn't have its own scope |
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shopt -s oil:all |
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var x = 1 |
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echo "x=$x" |
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cd / { |
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#set y = 5 # This would be an error because set doesn't do dynamic lookup |
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var x = 42 |
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echo "x=$x" |
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} |
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echo "x=$x" |
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## STDOUT: |
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x=1 |
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x=42 |
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x=42 |
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## END |
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|
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#### block literal in expression mode: ^(echo $PWD) |
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shopt -s oil:all |
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|
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const myblock = ^(echo $PWD | wc -l) |
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const b2 = ^(echo one; echo two) |
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= myblock |
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= b2 |
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|
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# TODO: |
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# Implement something like this? |
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# _ evalexpr(b2, binding_dict) # e.g. to bind to QTSV fields |
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# _ evalblock(b2, binding_dict) |
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|
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## STDOUT: |
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one |
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two |
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## END |
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|
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#### block arg as typed expression |
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|
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shopt -s oil:all |
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|
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# literal |
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cd /tmp (^(echo $PWD)) |
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|
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const myblock = ^(echo $PWD) |
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cd /tmp (myblock) |
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|
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## STDOUT: |
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/tmp |
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/tmp |
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## END |
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|
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#### Pass invalid typed args |
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|
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cd /tmp (42) # should be a block |
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echo status=$? |
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|
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cd /tmp (1, 2) |
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echo status=$? |
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|
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## STDOUT: |
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status=2 |
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status=2 |
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## END |
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|
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#### 'builtin' and 'command' with block |
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shopt --set oil:upgrade |
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builtin cd / { |
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echo "builtin $PWD" |
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} |
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command cd / { |
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echo "command $PWD" |
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} |
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## STDOUT: |
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builtin / |
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command / |
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## END |
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|
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|
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#### Consistency: Control Flow and Blocks |
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shopt --set parse_brace |
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|
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# "Invalid control flow at top level" |
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eval ' |
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cd / { |
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echo cd |
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break |
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} |
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' |
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echo cd no loop $? |
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|
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# warning: "Unexpected control flow in block" (strict_control_flow) |
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eval ' |
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while true { |
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cd / { |
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echo cd |
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break |
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} |
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} |
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' |
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echo cd loop $? |
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|
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eval ' |
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while true { |
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shopt --unset errexit { |
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echo shopt |
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continue |
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} |
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} |
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' |
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echo shopt continue $? |
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|
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eval ' |
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while true { |
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shvar FOO=foo { |
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echo shvar |
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continue |
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} |
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} |
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' |
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echo shvar continue $? |
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|
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|
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eval ' |
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while true { |
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try { |
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echo try |
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break |
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} |
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} |
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' |
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echo try break $? |
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|
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## STDOUT: |
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cd |
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cd no loop 0 |
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cd |
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cd loop 1 |
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shopt |
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shopt continue 1 |
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shvar |
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shvar continue 1 |
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try |
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try break 1 |
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## END |
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|
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#### Consistency: Exit Status and Blocks |
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shopt --set parse_brace |
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|
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cd / { |
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false |
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} |
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echo cd=$? |
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|
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shopt --unset errexit { |
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false |
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} |
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echo shopt=$? |
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|
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shvar FOO=foo { |
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echo " FOO=$FOO" |
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false |
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} |
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echo shvar=$? |
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|
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try { |
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false |
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} |
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echo try=$? |
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|
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## STDOUT: |
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cd=0 |
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shopt=0 |
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FOO=foo |
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shvar=0 |
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try=0 |
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## END |
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|
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#### Consistency: Unwanted Blocks Are Errors |
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shopt --set parse_brace |
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|
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true { echo BAD } |
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echo true $? |
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|
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false ( 42, 43 ) |
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echo false $? |
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|
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echo { echo BAD } |
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echo echo block $? |
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|
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echo ( 42, 43 ) |
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echo echo args $? |
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|
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command echo 'command block' { echo BAD } |
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echo command echo $? |
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|
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builtin echo 'builtin block' { echo BAD } |
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echo builtin echo $? |
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|
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pushd $TMP { echo BAD } |
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echo pushd $? |
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|
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## STDOUT: |
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true 2 |
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false 2 |
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echo block 2 |
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echo args 2 |
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command echo 2 |
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builtin echo 2 |
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pushd 2 |
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## END |
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|
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#### Block with Bare Assignments |
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|
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# oil:all has parse_equals |
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# is there any way to turn on parse_equals only in config blocks? |
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# but we don't know what's a block ahead of time |
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# I think we would have to check at runtime. Look at VarChecker |
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|
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shopt --set oil:all |
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|
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proc Rule(s, b Block) { |
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echo "rule $s" |
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} |
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|
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proc myrules(name) { |
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Rule $name-python { |
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kind = 'python' |
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} |
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|
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Rule $name-cc { |
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kind = 'cc' # should NOT conflict |
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} |
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} |
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|
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myrules foo |
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myrules bar |
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|
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## STDOUT: |
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rule foo-python |
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rule foo-cc |
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rule bar-python |
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rule bar-cc |
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## END |
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|
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#### Block param binding |
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shopt --set parse_brace parse_proc |
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|
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proc package(name, b Block) { |
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= b |
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|
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var d = eval_hay(b) |
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|
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# NAME and TYPE? |
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setvar d->name = name |
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setvar d->type = 'package' |
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|
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# Now where does d go? |
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# Every time you do eval_hay, it clears _config? |
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# Another option: HAY_CONFIG |
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|
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if ('package_list' not in _config) { |
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setvar _config->package_list = [] |
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} |
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_ append(_config->package_list, d) |
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} |
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|
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package unzip { |
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version = 1 |
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} |
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|
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## STDOUT: |
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## END |
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|
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|
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#### Proc that doesn't take a block |
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shopt --set parse_brace parse_proc |
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|
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proc task(name) { |
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echo "task name=$name" |
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} |
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|
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task foo { |
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echo 'running task foo' |
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} |
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# This should be an error |
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echo status=$? |
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|
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## STDOUT: |
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status=1 |
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## END |