Logic for when $METHOD is something unexpected #1917
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… something unexpected.
ljharb
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Oct 2, 2018
install.sh
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| fi | ||
| install_nvm_as_script | ||
| else | ||
| echo >&2 'The environment variable $METHOD is set to "'"${METHOD}"'", which is not recognized as a valid installation method.' |
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Why the "'" thing, instead of something like this?:
echo >&2 "The environment variable \$METHOD is set to \"${METHOD}\", which is not recognized as a valid installation method.'
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Personal style. \" is fine too. I just use "'" by default because \" has been difficult for me to get right when doing more complex quotation escapes in Bash.
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it seems like shellcheck is erroring out on this. can you update it so tests are passing? style choices beyond that can be figured out later :-)
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If I'm reading it right, this is the cause of the failure: "SC2016: Expressions don't expand in single quotes, use double quotes for that." I think getting rid of the single quotes like you suggest will fix that, so I'll give it a try.
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Print an error and exit the script if $METHOD is set to something unexpected.
In my own personal case, Salt was setting $METHOD to "loopback", and I did not realize it. With this patch, the script output will make it clear what's going on, and it will not pretend to complete successfully.
I did a small amount of testing of my own, but I don't have the tools or experience to complete all the testing asked for in CONTRIBUTING.md. Can someone else help with that?