Add known branch exceptions to version matching

Maybe doing it this way is better, since we don't "break"
existing consumption elements

Forcing `version-type: strict`, while explicit, would
probably force some installations to use a too-specific
Elixir version

.github/workflows/action.yml

@@ -19,16 +19,11 @@ jobs:
           SHA=$(git rev-parse --short HEAD)
           sed -i'.bak' \
               -e "s/const setupBeamVersion = '.*'/const setupBeamVersion = '${SHA}'/g" \
-              dist/index.js
-          # it always starts by being 'undefined'
-          NEWVER=$(grep -oE "const setupBeamVersion = '.*'" dist/index.js | cut -d\' -f2)
-          if [ "$NEWVER" == "undefined" ]; then
-              exit 1
-          else
-              echo "Continuing... new version is ${NEWVER}"
-          fi
+              src/setup-beam.js
+          npm run build-dist
           git config user.name "GitHub Actions"
           git config user.email "[email protected]"
+          git add src/setup-beam.js
           git add dist/index.js
           git commit -m "Update setup-beam version output to ${SHA}"
           git push origin main

dist/index.js

@@ -9870,7 +9870,7 @@ async function main() {
   await maybeInstallRebar3(rebar3Spec)
 
   // undefined is replaced by a function, post- main branch merge
-  const setupBeamVersion = '4678b57'
+  const setupBeamVersion = 'undefined'
   core.setOutput('setup-beam-version', setupBeamVersion)
 }
 
@@ -10220,7 +10220,7 @@ function getVersionFromSpec(spec0, versions0) {
   const rangeMax = semver.maxSatisfying(versions, rangeForMax)
   let version = null
 
-  if (isStrictVersion() || isRC(spec0)) {
+  if (isStrictVersion() || isRC(spec0) || isKnownBranch(spec0)) {
     if (versions0[spec]) {
       // If `version-type: strict` or version is RC, we obtain it directly
       version = versions0[spec]
@@ -10292,6 +10292,10 @@ function isRC(ver) {
   return ver.match(xyzAbcVersion('^', '(?:-rc\\.?\\d+)'))
 }
 
+function isKnownBranch(ver) {
+  return ['main', 'master', 'maint'].includes(ver)
+}
+
 function getRunnerOSVersion() {
   const ImageOSToContainer = {
     ubuntu18: 'ubuntu-18.04',

src/setup-beam.js

@@ -404,7 +404,7 @@ function getVersionFromSpec(spec0, versions0) {
   const rangeMax = semver.maxSatisfying(versions, rangeForMax)
   let version = null
 
-  if (isStrictVersion() || isRC(spec0)) {
+  if (isStrictVersion() || isRC(spec0) || isKnownBranch(spec0)) {
     if (versions0[spec]) {
       // If `version-type: strict` or version is RC, we obtain it directly
       version = versions0[spec]
@@ -476,6 +476,10 @@ function isRC(ver) {
   return ver.match(xyzAbcVersion('^', '(?:-rc\\.?\\d+)'))
 }
 
+function isKnownBranch(ver) {
+  return ['main', 'master', 'maint'].includes(ver)
+}
+
 function getRunnerOSVersion() {
   const ImageOSToContainer = {
     ubuntu18: 'ubuntu-18.04',

test/setup-beam.test.js

@@ -182,6 +182,18 @@ async function testOTPVersions() {
     expected = 'OTP-20.0.5'
     got = await setupBeam.getOTPVersion(spec, osVersion)
     assert.deepStrictEqual(got, expected)
+
+    spec = 'maint'
+    osVersion = 'ubuntu-22.04'
+    expected = 'maint'
+    got = await setupBeam.getOTPVersion(spec, osVersion, hexMirrors)
+    assert.deepStrictEqual(got, expected)
+
+    spec = 'master'
+    osVersion = 'ubuntu-22.04'
+    expected = 'master'
+    got = await setupBeam.getOTPVersion(spec, osVersion, hexMirrors)
+    assert.deepStrictEqual(got, expected)
   }
 
   if (process.platform === 'win32') {