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d4g33z avatar d4g33z commented on July 20, 2024 1

This may be a similar issue, or my own misunderstanding of bashlex:

>>> bashlex.parse('DOCKER_BUILDTAGS+=" $tag"')
[CommandNode(parts=[AssignmentNode(parts=[ParameterNode(pos=(20, 24) value='tag')] pos=(0, 25) word='DOCKER_BUILDTAGS+= $tag')] pos=(0, 25))]

I expected the following output instead:

[CommandNode(parts=[AssignmentNode(parts=[ParameterNode(pos=(20, 24) value='tag')] pos=(0, 25) word='DOCKER_BUILDTAGS+=" $tag"')] pos=(0, 25))]

from bashlex.

verhovsky avatar verhovsky commented on July 20, 2024

@d4g33z that is unrelated to this issue and bashlex lexes your example correctly. This is how bash interprets that:

$ tag="world"
$ echo hello="   $tag"
hello=   world
$ 

In other words, echo gets one argument with $tag substituted for the value of the tag variable and the quotes removed. The " quotes are needed so that you can have whitespace in one argument (otherwise echo hello= $tag would pass two arguments to echo: hello= and $tag, which it would print separated by 1 space instead of however many I put in there, and that's just because of how echo works, it prints arguments separated by a space), they are stripped by bash before passing the args to the command being called.

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d4g33z avatar d4g33z commented on July 20, 2024

Sorry to hijack the issue. I'll have to revisit parsing += assignments that concatenate strings with white space.

Thanks, it's a great library.

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