Re: [PATCH 0/6] Error reporting and hints for missing modules

[myglc2]

On 11/10/2017 at 00:04 Ludovic Courtès writes:
>
> Thrilled by this idea, I pushed an unbound-variable handler that can
> provide hints, such as:
>
>   configuration.scm:88:19: zip: unbound variable
>   hint: Try adding `(use-modules (gnu packages compression))'.
>
> Feedback welcome!

I built and played with this.  If I follow some of the hints literally
they lead me astray. Here are some suggested hint rewording.

Note: You can reproduce the errors/hints below with the attached files.

HTH - George

HINT REWORDING SUGGESTIONS:

 *** test2: "NON EXISTANT PACKAGE MODULE (qemu) for qemu PACKAGE SPECIFIED"

The error messages ...

/root/ctest/test2:4:0: error: module (gnu packages qemu) not found
hint: Try adding `(use-package-modules virtualization)'.

... are followed literally in test2.fix, which does not fix the
problem because the stale and non-existant 'qemu' package module
reference also needs to be removed.

Maybe a better hint would be ...

hint: Remove the reference to the pachage module that was not 
hint: found and add `(use-package-modules virtualization)'.

 *** test3: 'NON EXISTANT (openssh) SERVICE MODULE specified'

This has the same conceptual problem as test2 above. 

The error messages ...

/root/ctest/test3:3:0: error: module (gnu services openssh) not found
hint: Try adding `(use-service-modules ssh)'.

... are followed literally in test3.fix, which does not fix the
problem because the non-existant 'openssh' service module
reference also needs to be removed.

Maybe a better hint would be ...

hint: Remove the reference to the service module that was not 
hint: found and add `(use-service-modules ssh)'.

 *** test4: "SERVICE MODULE (ssh) for openssh-service-type SERVICE MISSING"

A more helpful hint here ...

/root/ctest/test4:46:19: /root/ctest/test4:46:19: openssh-service-type: unbound 
variable
hint: Did you forget a `use-modules' form?

... would be ...

hint: Try adding `(use-service-modules ssh)'.

 ***
 
VERSION INFO:

74bea6a03 gnu: linux-libre: Update to 4.13.12.

make check failed as reported in bug#29245 but I don't think those
errors affect what I am seeing here.

TEST FILES:

test0.scm
Description: Binary data

try.sh
Description: Bourne shell script

try.sh.log
Description: Binary data