Validate shell scripts with Shellcheck #418
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Shellcheck says:
```
In eos-live-boot-overlayfs-setup line 17:
if [ $? != 0 ]; then
^-- SC2181 (style): Check exit code directly with e.g. 'if ! mycmd;', not indirectly with $?.
In eos-live-boot-overlayfs-setup line 47:
if [ $? == 0 ]; then
^-- SC2181 (style): Check exit code directly with e.g. 'if mycmd;', not indirectly with $?.
```
Shellcheck says:
```
In eos-live-boot-overlayfs-setup line 24:
echo ${persistent_loop}
^----------------^ SC2086 (info): Double quote to prevent globbing and word splitting.
Did you mean:
echo "${persistent_loop}"
```
We know this will not be a problem in practice but it's not hard to
placate shellcheck.
|
Tried to build it on OBS. The shellcheck alarms much more syntax issues. |
|
Interesting – it should be the same version of shellcheck and I added some logic to make the shellcheck check not fatal for certain files. |
Previously, shellcheck would warn:
In eos-firstboot line 9:
> /var/lib/eos-firstboot
^----------------------^ SC2188 (warning): This redirection doesn't have a command. Move to its command (or use 'true' as no-op).
For more information:
https://www.shellcheck.net/wiki/SC2188 -- This redirection doesn't have a c...
This is intended to catch cases where the redirect was meant to apply to
the command on the line before.
In this case the usage is correct. Use `:`, which means the same as the
`true` builtin: do nothing, successfully, with no output.
In eos-enable-zram line 5:
if [ $# -lt 1 -o "$1" -lt 0 -o "$1" -gt 1 ]; then
^-- SC2166 (warning): Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.
^-- SC2166 (warning): Prefer [ p ] || [ q ] as [ p -o q ] is not well defined.
In eos-enable-zram line 17:
echo $(($ram_size_kb * 3 / 2))K > /sys/block/zram0/disksize
^----------^ SC2004 (style): $/${} is unnecessary on arithmetic variables.
For more information:
https://www.shellcheck.net/wiki/SC2166 -- Prefer [ p ] || [ q ] as [ p -o q...
https://www.shellcheck.net/wiki/SC2004 -- $/${} is unnecessary on arithmeti...
|
Thanks for the OBS test. I don't understand why the offending scripts are not being skipped in OBS. I think for now I'll pause this and occasionally nudge it forwards by fixing the warnings so that the list of scripts that are expected to fail can be removed. |
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Currently all shell scripts found in the tree are at least syntax-checked by
bash -nordash -nbased on their shebang.But as I reviewed #417 I was suddenly gripped with the desire to run them all through
shellcheck. This devolved into over-engineering the runner emitting TAP-formatted output and wiring up a TAP parser in Automake.Having done all this, I think it may be unnecessary, but here's the PR anyway.