Updated GHA for LLVM 18 (#31)

* hello-word, leap, configuration updates

Completed the hello-world and leap exercises.
Updated configuration.

* Add workflow in test.yml

* Modified CI workflow to build Odin from source

* Completed difference-of-squares, added format-all

Completed the difference-of-squares practice exercise, and added the
`bin/format-all.sh` script that recursively searches for .odin files and
runs `odinfmt` on them.

* Formatted source, added formatting to webhook

All source files have been reformatted with the `odinfmt.json` spec.
`bin/format-all.sh` is now run automatically on commit.

* Added step to push autoformatting changes

The `test.yml` GitHub workflow now pushes any changes that it makes, so
that they persist in the repo.

* Modified test.yml to not fail on no formatting

`test.yml` now only attempts a commit and push if the automated
formatting actually changed any files.

* Added missing dashes in argument

* Fixed bin/verify-exercises

The verify-exercises script now runs the individual test for both
concept and practice exercises, and is the default in the GitHub
workflow.

* Added the "grains" exercise

Tests were lifted from the Gleam track.

* Updated README; fixed test verification

- The README now contains more thorough instructions on how to add a new
  exercise.
- Fixed a variable name in the test runner that caused the "test all
  solutions" loop to run multiple times when verifying solutions.

* Formatted config files with configlet

* Fixed testing bug that clobbered stub solutions

- Fixed bin/run-test.sh so that it doesn't delete the stub solution when
  a test fails.
- Restored exercises, and added a NotImplemented error condition for the
  stubs.

* Small code fixes. Updated README.

- Ran the code formatter on source files.
- Rehaul of the README to follow Python's example.

* Added resistor-color exercise. Updated README.

* Fixed and tested the test.yml action

The workflow now uses a fixed commit hash to pull a specific release of
Odin. We now use Ubuntu 22.04 which has the libffi8 dependency, and add
clang as the only other dependency.

* Implemented the resistor-color exercise

* Removed configlet dependency in test.yml

* Moved the exercise checklist to a linked GH issue

* Test runner now checks that stub solution fails

Added a check to bin/run-test.sh so that verifies that the stub solution
does *not* pass any tests. Fixed hello-world.odin to actually be a stub.

* Fixed incorrect stubs, added panics for stub procs

- Improved bin/run-test.sh to add more visible color coding to the
  output.
- Replaced NotImplemented error codes with a compile-time panic for
  procedures that have not yet been implemented.
- Fixed stubs that were actually complete examples.

* Removed fancy terminal color commands

* Added support for skipping and unskipping tests

- Exercises' unit tests were modified so that only a minimal subset of
  tests are initially enabled; the rest are skipped.
- The test runner was modified to automatically unskip all test cases
  before running the tests.

* Removed mention of NotImplemented in the README

* Updated GHA to support the latest Odin version

* Force replacement of old clang link

* Added Odin release tag so that setup-odin doesn't build latest

.github/workflows/test.yml

@@ -13,20 +13,27 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-      - name: Update packages
-        run: sudo apt update
+      - name: Download Clang
+        run: wget https://apt.llvm.org/llvm.sh
 
-      - name: Install Clang
-        run: sudo apt -y install clang
+      - name: Set install script permissions
+        run: chmod u+x llvm.sh
+
+      - name: Install Clang 18
+        run: sudo ./llvm.sh 18
+
+      - name: Setup default version
+        run: sudo ln -f /usr/bin/clang-18 /usr/bin/clang
 
       - name: Checkout repository
         uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
 
       - name: Setup Odin
-        uses: laytan/setup-odin@41f9612bfec760bbb68b05b5747f319afe7c48d8
+        uses: laytan/setup-odin@3df60bd622575fda7efa4a3ec928f446bcae1a0a
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
-          llvm-version: 14
+          llvm-version: 18
+          release: dev-2024-09
 
       - name: Verify all exercises
         run: bin/verify-exercises

bin/run-test.sh

@@ -63,7 +63,7 @@ function run_test() {
         # double-check that the example didn't accidentally get duplicated as the stub, this isn't
         # too critical for now.
 
-        if odin test ${tmp_path} ; then
+        if odin test ${tmp_path} 2> /dev/null ; then
             echo -e '\nERROR: The stub solution must not pass the tests!\n'
             exit 1
         else

exercises/practice/grains/grains.odin

@@ -1,6 +1,6 @@
 package grains
 
-Error :: enum {}// Please inspect the tests to see which error states to enumerate here.
+Error :: enum {} // Please inspect the tests to see which error states to enumerate here.
 
 
 // Returns the number of grains on the specified square.

exercises/practice/resistor-color/resistor_color.odin

@@ -1,6 +1,6 @@
 package resistor_color
 
-Color :: enum {}// Implement an enumeration of all the resistor colors.
+Color :: enum {} // Implement an enumeration of all the resistor colors.
 
 
 code :: proc(color: Color) -> int {