Fix failing CI (#87)

Otherwise it is difficult to know that the erlef/setup-beam matchers are
what is creating the warning/error annotations on PR's

.github/workflows/action.yml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: '14'
       - run: npm install -g npm
       - run: npm install
       - run: npm run build
@@ -38,7 +38,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: '14'
       - run: npm ci
       - run: npm test
 
@@ -49,6 +49,6 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-node@v1
         with:
-          node-version: 12
+          node-version: '14'
       - run: npm install --production
       - run: npm test

.github/workflows/ubuntu.yml

@@ -21,30 +21,19 @@ jobs:
       fail-fast: false
       matrix:
         combo:
-          - elixir-version: 'v1.0'
+          - otp-version: '24'
-            otp-version: '17'
+            rebar3-version: 'nightly'
-            os: 'ubuntu-16.04'
+            os: 'ubuntu-latest'
           - elixir-version: 'v1.0'
             otp-version: '17'
             os: 'ubuntu-18.04'
-          - elixir-version: 'v1.1'
-            otp-version: '18'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.1'
             otp-version: '18'
             os: 'ubuntu-18.04'
-          - elixir-version: 'v1.2'
-            otp-version: '19'
-            rebar3-version: '3.10'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.2'
             otp-version: '19'
             rebar3-version: '3.10'
             os: 'ubuntu-18.04'
-          - elixir-version: 'v1.4'
-            otp-version: '20'
-            rebar3-version: '3.11'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.4'
             otp-version: '20'
             rebar3-version: '3.6.0'
@@ -53,10 +42,6 @@ jobs:
             otp-version: '20'
             rebar3-version: '3.11'
             os: 'ubuntu-20.04'
-          - elixir-version: 'v1.6'
-            otp-version: '21'
-            rebar3-version: '3.12'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.6'
             otp-version: '21'
             rebar3-version: '3.12'
@@ -65,10 +50,6 @@ jobs:
             otp-version: '21'
             rebar3-version: '3.12'
             os: 'ubuntu-20.04'
-          - elixir-version: 'v1.7'
-            otp-version: '22'
-            rebar3-version: '3.13'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.7'
             otp-version: '22'
             rebar3-version: '3.13'
@@ -77,10 +58,6 @@ jobs:
             otp-version: '22'
             rebar3-version: '3.13'
             os: 'ubuntu-20.04'
-          - elixir-version: 'v1.10'
-            otp-version: '23'
-            rebar3-version: '3.14'
-            os: 'ubuntu-16.04'
           - elixir-version: 'v1.10'
             otp-version: '23'
             rebar3-version: '3.14'
@@ -111,6 +88,12 @@ jobs:
             otp-version: '24'
             rebar3-version: '3.16'
             os: 'ubuntu-latest'
+          - gleam-version: '0.19.0-rc3'
+            otp-version: '24'
+            os: 'ubuntu-latest'
+          - gleam-version: '0.19.0-rc3'
+            otp-version: false
+            os: 'ubuntu-latest'
     steps:
       - uses: actions/checkout@v2
       - name: Use erlef/setup-beam
@@ -124,6 +107,7 @@ jobs:
           version-type: ${{matrix.combo.version-type}}
       - name: Erlang/OTP version (action)
         run: echo "Erlang/OTP ${{steps.setup-beam.outputs.otp-version}}"
+        if: ${{matrix.combo.otp-version}}
       - name: Elixir version (action)
         run: echo "Elixir ${{steps.setup-beam.outputs.elixir-version}}"
         if: ${{matrix.combo.elixir-version}}
@@ -155,3 +139,13 @@ jobs:
           cd test-projects/gleam_rebar3
           rebar3 eunit
         if: ${{matrix.combo.gleam-version}}
+      - name: Type check Gleam project (without installing Erlang/OTP)
+        run: |
+          cd test-projects/gleam_gleam
+          gleam check
+        if: ${{ matrix.combo.gleam-version && !matrix.combo.otp-version }}
+      - name: Run Gleam project tests (without `rebar3`)
+        run: |
+          cd test-projects/gleam_gleam
+          gleam test
+        if: ${{ matrix.combo.gleam-version && matrix.combo.otp-version && !matrix.combo.rebar3-version }}

.github/workflows/update_3rd_party_licenses.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+set -eux
+
+git config user.name "GitHub Actions"
+git config user.email "actions@user.noreply.github.com"
+git checkout main
+
+npm run licenses
+
+git add 3RD_PARTY_LICENSES
+git commit -m "Update 3rd party licenses" || true
+git push origin

.github/workflows/update_3rd_party_licenses.yml

@@ -0,0 +1,19 @@
+---
+name: update_3rd_party_licenses
+
+on:
+  schedule:
+    - cron: '0 12 * * *'
+  workflow_dispatch:
+
+jobs:
+  update:
+    name: Update 3rd party licenses
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '14'
+      - run:
+          ./.github/workflows/update_3rd_party_licenses.sh

.github/workflows/windows.yml

@@ -24,27 +24,12 @@ jobs:
           - otp-version: '24.0.2'
             rebar3-version: '3.16'
             os: 'windows-2019'
+          - otp-version: '24.0.2'
+            rebar3-version: 'nightly'
+            os: 'windows-2019'
           - otp-version: '23.0'
             rebar3-version: '3.15'
             os: 'windows-2019'
-          - otp-version: '24.0.2'
-            rebar3-version: '3.16'
-            os: 'windows-2016'
-          - otp-version: '23.0'
-            rebar3-version: '3.15'
-            os: 'windows-2016'
-          - otp-version: '22.3'
-            rebar3-version: '3.15'
-            os: 'windows-2016'
-          - otp-version: '22.0'
-            rebar3-version: '3.15'
-            os: 'windows-2016'
-          - otp-version: '21.3'
-            rebar3-version: '3.15'
-            os: 'windows-2016'
-          - otp-version: '21.0'
-            rebar3-version: '3.15'
-            os: 'windows-2016'
           - elixir-version: 'v1.10'
             otp-version: '23'
             rebar3-version: '3.14'

README.md

@@ -11,19 +11,22 @@
 This action sets up an Erlang/OTP environment for use in a GitHub Actions
 workflow by:
 
-- installing Erlang/OTP
+- installing [Erlang/OTP](https://www.erlang.org/)
-- optionally, installing Elixir
+- optionally, installing [Elixir](https://elixir-lang.org/)
-- optionally, installing Gleam
+- optionally, installing [Gleam](https://gleam.run/)
-- optionally, installing `rebar3`
+- optionally, installing [`rebar3`](https://www.rebar3.org/)
-- optionally, installing `hex`
+- optionally, installing [`hex`](https://hex.pm/)
+- optionally, having
+  [problem matchers](https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md) show
+  warnings and errors on pull requestsotp-version: false)
 
-**Note** Currently, this action only supports Actions' `ubuntu-` and `windows-` runtimes.
+**Note**: currently, this action only supports Actions' `ubuntu-` and `windows-` runtimes.
 
 ## Usage
 
 See [action.yml](action.yml) for the action's specification.
 
-**Note**: The Erlang/OTP release version specification is [relatively
+**Note**: the Erlang/OTP release version specification is [relatively
 complex](http://erlang.org/doc/system_principles/versions.html#version-scheme).
 For best results, we recommend specifying exact
 versions, and setting option `version-type` to `strict`.
@@ -46,10 +49,8 @@ and Erlang/OTP.
 
 | Operating system | Erlang/OTP | Status
 |-                 |-           |-
-| ubuntu-16.04     | 17 - 24    | ✅
 | ubuntu-18.04     | 17 - 24    | ✅
 | ubuntu-20.04     | 20 - 24    | ✅
-| windows-2016     | 21* - 24   | ✅
 | windows-2019     | 21* - 24   | ✅
 
 **Note** *: prior to 23, Windows builds are only available for minor versions, e.g. 21.0, 21.3, 22.0, etc.
@@ -61,10 +62,8 @@ uses that to download assets:
 
 | ImageOS  | Operating system
 |-         |-
-| ubuntu16 | ubuntu-16.04
 | ubuntu18 | ubuntu-18.04
 | ubuntu20 | ubuntu-20.04
-| win16    | windows-2016
 | win19    | windows-2019
 
 as per the following example:
@@ -148,7 +147,7 @@ jobs:
       - run: rebar3 ct
 ```
 
-### Example (Gleam + `rebar3`, on Ubuntu)
+### Example (Gleam on Ubuntu)
 
 ```yaml
 # create this in .github/workflows/ci.yml
@@ -162,14 +161,35 @@ jobs:
       - uses: erlef/setup-beam@v1
         with:
           otp-version: '24'
-          gleam-version: '0.16'
+          gleam-version: '0.19.0-rc3'
-          rebar3-version: '3.16'
+      - run: gleam test
-      - run: rebar3 ct
 ```
 
+### Example (Gleam on Ubuntu without OTP)
+
+```yaml
+# create this in .github/workflows/ci.yml
+on: push
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: false
+          gleam-version: '0.19.0-rc3'
+      - run: gleam check
+```
+
+**Note**: the `otp-version: false` input is only applicable when installing Gleam.
+
 ## Elixir Problem Matchers
 
-The Elixir Problem Matchers in this repository are adapted from [here](https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/package.json#L70-L118). See [MATCHER_NOTICE](MATCHER_NOTICE.md) for license details.
+The Elixir Problem Matchers in this repository are adapted from
+[here](https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/package.json#L70-L118).
+See [MATCHER_NOTICE](MATCHER_NOTICE.md) for license details.
 
 ## Action versioning
 
@@ -179,9 +199,9 @@ The Elixir Problem Matchers in this repository are adapted from [here](https://g
 - `@v1.8`: the latest in the `1.8.z` series (this tag is movable),
 - `@v1.8.0`: release `1.8.0` (this tag is not movable).
 
-To prevent issues in CI (unless you're OK with potential incompatibility between versions - we
+We make a real effort to not introduce incompatibilities without changing the major
-make real a effort to not introduce those without bumping major) we suggest you to use `@vx.y.z`,
+version number. To be extra safe against changes causing issues in your CI you should specify
-whenever possible.
+an exact version with `@vx.y.z`.
 
 ## License
 

action.yml

@@ -8,24 +8,31 @@ branding:
   color: blue
   icon: code
 inputs:
+  otp-version:
+    description: Version range or exact version of Erlang/OTP to use,
+      or false when installing only Gleam without OTP
+    required: true
   elixir-version:
     description: Version range or exact version of Elixir to use
-  otp-version:
-    description: Version range or exact version of Erlang/OTP to use
   gleam-version:
     description: Version range or exact version of Gleam to use
   install-hex:
-    description: Whether to install Hex (with Mix)
+    description: Whether to install Hex (with mix local.hex
+      when installing Elixir)
     default: true
   install-rebar:
-    description: Whether to install Rebar (with Mix)
+    description: Whether to install Rebar (with mix local.rebar
+      when installing Elixir)
     default: true
   rebar3-version:
-    description: Version range or exact version of rebar3 to use
+    description: Version range or exact version of rebar3 to use (or nightly)
   version-type:
     description: strict means the versions are take as-are; loose means we try
       to guess versions based on semver rules
     default: loose
+  disable_problem_matchers:
+    description: whether to have the problem matchers present in the results (or not)
+    default: false
 outputs:
   elixir-version:
     description: Exact version of Elixir that was installed

dist/index.js

@@ -4687,25 +4687,29 @@ async function main() {
 
   const osVersion = getRunnerOSVersion()
   const otpSpec = core.getInput('otp-version', { required: true })
-  const otpVersion = await installOTP(otpSpec, osVersion)
-
   const elixirSpec = core.getInput('elixir-version', { required: false })
-  const elixirInstalled = await maybeInstallElixir(elixirSpec, otpVersion)
+  const gleamSpec = core.getInput('gleam-version', { required: false })
-  if (elixirInstalled === true) {
+  const rebar3Spec = core.getInput('rebar3-version', { required: false })
-    const shouldMixRebar = core.getInput('install-rebar', {
+
-      required: false,
+  if (otpSpec !== 'false') {
-    })
+    const otpVersion = await installOTP(otpSpec, osVersion)
-    await mix(shouldMixRebar, 'rebar')
+    const elixirInstalled = await maybeInstallElixir(elixirSpec, otpVersion)
-    const shouldMixHex = core.getInput('install-hex', {
+
-      required: false,
+    if (elixirInstalled === true) {
-    })
+      const shouldMixRebar = core.getInput('install-rebar', {
-    await mix(shouldMixHex, 'hex')
+        required: false,
+      })
+      await mix(shouldMixRebar, 'rebar')
+      const shouldMixHex = core.getInput('install-hex', {
+        required: false,
+      })
+      await mix(shouldMixHex, 'hex')
+    }
+  } else if (!gleamSpec) {
+    throw new Error('otp-version=false is only available when installing Gleam')
   }
 
-  const gleamSpec = core.getInput('gleam-version', { required: false })
   await maybeInstallGleam(gleamSpec)
-
-  const rebar3Spec = core.getInput('rebar3-version', { required: false })
   await maybeInstallRebar3(rebar3Spec)
 }
 
@@ -4738,10 +4742,15 @@ async function maybeInstallElixir(elixirSpec, otpVersion) {
     console.log(`##[group]Installing Elixir ${elixirVersion}`)
     await installer.installElixir(elixirVersion)
     core.setOutput('elixir-version', elixirVersion)
-    const matchersPath = __nccwpck_require__.ab + ".github"
+    const disableProblemMatchers = core.getInput('disable_problem_matchers', {
-    console.log(
+      required: false,
-      `##[add-matcher]${path.join(matchersPath, 'elixir-matchers.json')}`,
+    })
-    )
+    if (!disableProblemMatchers) {
+      const matchersPath = __nccwpck_require__.ab + ".github"
+      console.log(
+        `##[add-matcher]${path.join(matchersPath, 'elixir-matchers.json')}`,
+      )
+    }
     core.addPath(`${process.env.RUNNER_TEMP}/.setup-beam/elixir/bin`)
     console.log('##[endgroup]')
 
@@ -4780,9 +4789,14 @@ async function maybeInstallGleam(gleamSpec) {
 
 async function maybeInstallRebar3(rebar3Spec) {
   let installed = false
+  let rebar3Version
 
   if (rebar3Spec) {
-    const rebar3Version = await getRebar3Version(rebar3Spec)
+    if (rebar3Spec === 'nightly') {
+      rebar3Version = 'nightly'
+    } else {
+      rebar3Version = await getRebar3Version(rebar3Spec)
+    }
     console.log(`##[group]Installing rebar3 ${rebar3Version}`)
     await installer.installRebar3(rebar3Version)
     core.setOutput('rebar3-version', rebar3Version)
@@ -5060,10 +5074,8 @@ function sortVersions(left, right) {
 
 function getRunnerOSVersion() {
   const ImageOSToContainer = {
-    ubuntu16: 'ubuntu-16.04',
     ubuntu18: 'ubuntu-18.04',
     ubuntu20: 'ubuntu-20.04',
-    win16: 'windows-2016',
     win19: 'windows-2019',
   }
   const containerFromEnvImageOS = ImageOSToContainer[process.env.ImageOS]

dist/install-rebar3.ps1

@@ -10,12 +10,19 @@ $FILE_OUTPUT_PS1="rebar3.ps1"
 $DIR_FOR_BIN=".setup-beam/rebar3"
 
 $ProgressPreference="SilentlyContinue"
-Invoke-WebRequest "https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}" -OutFile "$FILE_OUTPUT"
+$REBAR3_TARGET="https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+$REBAR3_NIGHTLY=""
+If ( $VSN -eq "nightly" )
+{
+    $REBAR3_TARGET="https://s3.amazonaws.com/rebar3-nightly/rebar3"
+    $REBAR3_NIGHTLY=" (from nightly build)"
+}
+Invoke-WebRequest "$REBAR3_TARGET" -OutFile "$FILE_OUTPUT"
 $ProgressPreference="Continue"
 New-Item "$DIR_FOR_BIN/bin" -ItemType Directory | Out-Null
 Move-Item "$FILE_OUTPUT" "$DIR_FOR_BIN/bin"
 Write-Output "& escript.exe $PWD/$DIR_FOR_BIN/bin/$FILE_OUTPUT `$args" | Out-File -FilePath "$FILE_OUTPUT_PS1" -Encoding utf8 -Append
 type $FILE_OUTPUT_PS1
 Move-Item "$FILE_OUTPUT_PS1" "$DIR_FOR_BIN/bin"
-Write-Output "Installed rebar3 version follows"
+Write-Output "Installed rebar3 version$REBAR3_NIGHTLY follows"
 & "$DIR_FOR_BIN/bin/rebar3" "version" | Write-Output

dist/install-rebar3.sh

@@ -9,9 +9,15 @@ FILE_INPUT=rebar3
 FILE_OUTPUT=rebar3
 DIR_FOR_BIN=.setup-beam/rebar3
 
-wget -q -O "${FILE_OUTPUT}" "https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+REBAR3_TARGET="https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+REBAR3_NIGHTLY=""
+if [ "${VSN}" == "nightly" ]; then
+    REBAR3_TARGET="https://s3.amazonaws.com/rebar3-nightly/rebar3"
+    REBAR3_NIGHTLY=" (from nightly build)"
+fi
+wget -q -O "${FILE_OUTPUT}" "${REBAR3_TARGET}"
 mkdir -p "${DIR_FOR_BIN}/bin"
 chmod +x "${FILE_OUTPUT}"
 mv "${FILE_OUTPUT}" "${DIR_FOR_BIN}/bin"
-echo "Installed rebar3 version follows"
+echo "Installed rebar3 version$REBAR3_NIGHTLY follows"
 ${DIR_FOR_BIN}/bin/rebar3 version

package.json

@@ -8,7 +8,7 @@
     "jslint": "eslint src/**/*.js && eslint __tests__/**/*.js",
     "licenses": "yarn licenses generate-disclaimer > 3RD_PARTY_LICENSES",
     "markdownlint": "markdownlint *.md",
-    "shellcheck": "shellcheck src/install-*.sh",
+    "shellcheck": "shellcheck src/install-*.sh .github/workflows/*.sh",
     "test": "node __tests__/setup-beam.test.js && node ./__tests__/problem-matchers.test.js",
     "yamllint": "yamllint .github/workflows/**.yml && yamllint .*.yml && yamllint *.yml"
   },
@@ -26,6 +26,9 @@
     "@vercel/ncc": "0.27.0",
     "eslint": "7.22.0",
     "eslint-config-airbnb": "v18.2.1",
+    "eslint-plugin-import": "^2.24.2",
+    "eslint-plugin-jsx-a11y": "^6.4.1",
+    "eslint-plugin-react": "^7.25.1",
     "husky": "5.2.0",
     "markdownlint": "0.23.1",
     "prettier": "2.2.1",

src/install-rebar3.ps1

@@ -10,12 +10,19 @@ $FILE_OUTPUT_PS1="rebar3.ps1"
 $DIR_FOR_BIN=".setup-beam/rebar3"
 
 $ProgressPreference="SilentlyContinue"
-Invoke-WebRequest "https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}" -OutFile "$FILE_OUTPUT"
+$REBAR3_TARGET="https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+$REBAR3_NIGHTLY=""
+If ( $VSN -eq "nightly" )
+{
+    $REBAR3_TARGET="https://s3.amazonaws.com/rebar3-nightly/rebar3"
+    $REBAR3_NIGHTLY=" (from nightly build)"
+}
+Invoke-WebRequest "$REBAR3_TARGET" -OutFile "$FILE_OUTPUT"
 $ProgressPreference="Continue"
 New-Item "$DIR_FOR_BIN/bin" -ItemType Directory | Out-Null
 Move-Item "$FILE_OUTPUT" "$DIR_FOR_BIN/bin"
 Write-Output "& escript.exe $PWD/$DIR_FOR_BIN/bin/$FILE_OUTPUT `$args" | Out-File -FilePath "$FILE_OUTPUT_PS1" -Encoding utf8 -Append
 type $FILE_OUTPUT_PS1
 Move-Item "$FILE_OUTPUT_PS1" "$DIR_FOR_BIN/bin"
-Write-Output "Installed rebar3 version follows"
+Write-Output "Installed rebar3 version$REBAR3_NIGHTLY follows"
 & "$DIR_FOR_BIN/bin/rebar3" "version" | Write-Output

src/install-rebar3.sh

@@ -9,9 +9,15 @@ FILE_INPUT=rebar3
 FILE_OUTPUT=rebar3
 DIR_FOR_BIN=.setup-beam/rebar3
 
-wget -q -O "${FILE_OUTPUT}" "https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+REBAR3_TARGET="https://github.com/erlang/rebar3/releases/download/${VSN}/${FILE_INPUT}"
+REBAR3_NIGHTLY=""
+if [ "${VSN}" == "nightly" ]; then
+    REBAR3_TARGET="https://s3.amazonaws.com/rebar3-nightly/rebar3"
+    REBAR3_NIGHTLY=" (from nightly build)"
+fi
+wget -q -O "${FILE_OUTPUT}" "${REBAR3_TARGET}"
 mkdir -p "${DIR_FOR_BIN}/bin"
 chmod +x "${FILE_OUTPUT}"
 mv "${FILE_OUTPUT}" "${DIR_FOR_BIN}/bin"
-echo "Installed rebar3 version follows"
+echo "Installed rebar3 version$REBAR3_NIGHTLY follows"
 ${DIR_FOR_BIN}/bin/rebar3 version

src/setup-beam.js

@@ -15,25 +15,29 @@ async function main() {
 
   const osVersion = getRunnerOSVersion()
   const otpSpec = core.getInput('otp-version', { required: true })
-  const otpVersion = await installOTP(otpSpec, osVersion)
-
   const elixirSpec = core.getInput('elixir-version', { required: false })
-  const elixirInstalled = await maybeInstallElixir(elixirSpec, otpVersion)
+  const gleamSpec = core.getInput('gleam-version', { required: false })
-  if (elixirInstalled === true) {
+  const rebar3Spec = core.getInput('rebar3-version', { required: false })
-    const shouldMixRebar = core.getInput('install-rebar', {
+
-      required: false,
+  if (otpSpec !== 'false') {
-    })
+    const otpVersion = await installOTP(otpSpec, osVersion)
-    await mix(shouldMixRebar, 'rebar')
+    const elixirInstalled = await maybeInstallElixir(elixirSpec, otpVersion)
-    const shouldMixHex = core.getInput('install-hex', {
+
-      required: false,
+    if (elixirInstalled === true) {
-    })
+      const shouldMixRebar = core.getInput('install-rebar', {
-    await mix(shouldMixHex, 'hex')
+        required: false,
+      })
+      await mix(shouldMixRebar, 'rebar')
+      const shouldMixHex = core.getInput('install-hex', {
+        required: false,
+      })
+      await mix(shouldMixHex, 'hex')
+    }
+  } else if (!gleamSpec) {
+    throw new Error('otp-version=false is only available when installing Gleam')
   }
 
-  const gleamSpec = core.getInput('gleam-version', { required: false })
   await maybeInstallGleam(gleamSpec)
-
-  const rebar3Spec = core.getInput('rebar3-version', { required: false })
   await maybeInstallRebar3(rebar3Spec)
 }
 
@@ -66,10 +70,15 @@ async function maybeInstallElixir(elixirSpec, otpVersion) {
     console.log(`##[group]Installing Elixir ${elixirVersion}`)
     await installer.installElixir(elixirVersion)
     core.setOutput('elixir-version', elixirVersion)
-    const matchersPath = path.join(__dirname, '..', '.github')
+    const disableProblemMatchers = core.getInput('disable_problem_matchers', {
-    console.log(
+      required: false,
-      `##[add-matcher]${path.join(matchersPath, 'elixir-matchers.json')}`,
+    })
-    )
+    if (!disableProblemMatchers) {
+      const matchersPath = path.join(__dirname, '..', '.github')
+      console.log(
+        `##[add-matcher]${path.join(matchersPath, 'elixir-matchers.json')}`,
+      )
+    }
     core.addPath(`${process.env.RUNNER_TEMP}/.setup-beam/elixir/bin`)
     console.log('##[endgroup]')
 
@@ -108,9 +117,14 @@ async function maybeInstallGleam(gleamSpec) {
 
 async function maybeInstallRebar3(rebar3Spec) {
   let installed = false
+  let rebar3Version
 
   if (rebar3Spec) {
-    const rebar3Version = await getRebar3Version(rebar3Spec)
+    if (rebar3Spec === 'nightly') {
+      rebar3Version = 'nightly'
+    } else {
+      rebar3Version = await getRebar3Version(rebar3Spec)
+    }
     console.log(`##[group]Installing rebar3 ${rebar3Version}`)
     await installer.installRebar3(rebar3Version)
     core.setOutput('rebar3-version', rebar3Version)
@@ -388,10 +402,8 @@ function sortVersions(left, right) {
 
 function getRunnerOSVersion() {
   const ImageOSToContainer = {
-    ubuntu16: 'ubuntu-16.04',
     ubuntu18: 'ubuntu-18.04',
     ubuntu20: 'ubuntu-20.04',
-    win16: 'windows-2016',
     win19: 'windows-2019',
   }
   const containerFromEnvImageOS = ImageOSToContainer[process.env.ImageOS]

test-projects/gleam_gleam/.github/workflows/test.yml

@@ -0,0 +1,21 @@
+name: test
+
+on:
+  push:
+    branches:
+      - master
+      - main
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.0.0
+      - uses: erlef/setup-beam@v1.9.0
+        with:
+          otp-version: "23.2"
+          gleam-version: "0.19.0-rc3"
+      - run: gleam format --check src test
+      - run: gleam deps download
+      - run: gleam test

test-projects/gleam_gleam/.gitignore

@@ -0,0 +1,4 @@
+*.beam
+*.ez
+build
+erl_crash.dump

test-projects/gleam_gleam/README.md

@@ -0,0 +1,19 @@
+# gleam_gleam
+
+A Gleam project
+
+## Quick start
+
+```sh
+gleam run   # Run the project
+gleam test  # Run the tests
+gleam shell # Run an Erlang shell
+```
+
+## Installation
+
+If available on Hex this package can be added to your Gleam project.
+
+```sh
+gleam add gleam_gleam
+```

test-projects/gleam_gleam/gleam.toml

@@ -0,0 +1,16 @@
+name = "gleam_gleam"
+version = "0.1.0"
+
+# Fill out these fields if you intend to generate HTML documentation or publish
+# your project to the Hex package manager.
+#
+# licences = ["Apache-2.0"]
+# description = "A Gleam library..."
+# repository = { type = "github", user = "username", repo = "project" }
+# links = [{ title = "Website", href = "https://gleam.run" }]
+
+[dependencies]
+gleam_stdlib = "~> 0.18"
+
+[dev-dependencies]
+gleeunit = "~> 0.5"

test-projects/gleam_gleam/manifest.toml

@@ -0,0 +1,11 @@
+# This file was generated by Gleam
+# You typically do not need to edit this file
+
+packages = [
+  { name = "gleam_stdlib", version = "0.19.2", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "FFA79EA12369F122B68885E694E097D6810402A2F86BFF48AAE9E40ACE654F4C" },
+  { name = "gleeunit", version = "0.6.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleeunit", source = "hex", outer_checksum = "77701A5E5A565727E1EEAC9196FB878D544049B6331CD0305B5A69699135EA1C" },
+]
+
+[requirements]
+gleam_stdlib = "~> 0.18"
+gleeunit = "~> 0.5"

test-projects/gleam_gleam/src/gleam_gleam.gleam

@@ -0,0 +1,5 @@
+import gleam/io
+
+pub fn main() {
+  io.println("Hello from gleam_gleam!")
+}

test-projects/gleam_gleam/test/gleam_gleam_test.gleam

@@ -0,0 +1,12 @@
+import gleeunit
+import gleeunit/should
+
+pub fn main() {
+  gleeunit.main()
+}
+
+// gleeunit test functions end in `_test`
+pub fn hello_world_test() {
+  1
+  |> should.equal(1)
+}