From 14bacb3367912b7b448c2e7535eb0cb7a8adf641 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20Meadows-J=C3=B6nsson?=
 <eric.meadows.jonsson@gmail.com>
Date: Sun, 17 Nov 2019 19:30:42 +0100
Subject: [PATCH 1/3] Install from hex

---
 script/build-versions     |  19 -----
 src/elixir-versions.txt   |  24 -------
 src/erlang-versions.txt   | 143 --------------------------------------
 src/install-elixir        |   8 +++
 src/install-elixir-ubuntu |  13 ----
 src/install-otp           |  10 +++
 src/install-otp-ubuntu    |  16 -----
 src/installer.js          |  11 ++-
 src/setup-elixir.js       |  72 +++++++++++++++----
 9 files changed, 82 insertions(+), 234 deletions(-)
 delete mode 100755 script/build-versions
 delete mode 100644 src/elixir-versions.txt
 delete mode 100644 src/erlang-versions.txt
 create mode 100755 src/install-elixir
 delete mode 100755 src/install-elixir-ubuntu
 create mode 100755 src/install-otp
 delete mode 100755 src/install-otp-ubuntu

diff --git a/script/build-versions b/script/build-versions
deleted file mode 100755
index a40f93c..0000000
--- a/script/build-versions
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-set -eo pipefail
-
-# Find all releases that are $major.$minor(.$patch)? (no branch versions or rcs)
-curl -fs https://raw.githubusercontent.com/erlang/otp/master/otp_versions.table \
-  | cut -d: -f1 \
-  | cut -d- -f2 \
-  | awk '{$1=$1};1' \
-  | grep -E '^\d+\.\d+(?:\.\d+)?$' \
-  | sed -E 's/^([0-9]+\.[0-9]+)$/\1.0/g' \
-  > src/erlang-versions.txt
-
-# Find all releases that are $major.$minor(.$patch)? (no rcs)
-curl -fs https://api.github.com/repos/elixir-lang/elixir/releases \
-  | jq -r '.[].tag_name' \
-  | sed 's/^v//' \
-  | grep -v '-' \
-  > src/elixir-versions.txt
\ No newline at end of file
diff --git a/src/elixir-versions.txt b/src/elixir-versions.txt
deleted file mode 100644
index 3a71b25..0000000
--- a/src/elixir-versions.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-1.9.4
-1.9.3
-1.9.2
-1.9.1
-1.9.0
-1.8.2
-1.8.1
-1.8.0
-1.7.4
-1.7.3
-1.7.2
-1.7.1
-1.7.0
-1.6.6
-1.6.5
-1.6.4
-1.6.3
-1.6.2
-1.6.1
-1.6.0
-1.5.3
-1.5.2
-1.5.1
-1.5.0
diff --git a/src/erlang-versions.txt b/src/erlang-versions.txt
deleted file mode 100644
index 4930d37..0000000
--- a/src/erlang-versions.txt
+++ /dev/null
@@ -1,143 +0,0 @@
-22.1.5
-22.1.4
-22.1.3
-22.1.2
-22.1.1
-22.1
-22.0.7
-22.0.6
-22.0.5
-22.0.4
-22.0.3
-22.0.2
-22.0.1
-22.0.0
-21.3.8
-21.3.7
-21.3.6
-21.3.5
-21.3.4
-21.3.3
-21.3.2
-21.3.1
-21.3.0
-21.2.7
-21.2.6
-21.2.5
-21.2.4
-21.2.3
-21.2.2
-21.2.1
-21.2.0
-21.1.4
-21.1.3
-21.1.2
-21.1.1
-21.1.0
-21.0.9
-21.0.8
-21.0.7
-21.0.6
-21.0.5
-21.0.4
-21.0.3
-21.0.2
-21.0.1
-21.0.0
-20.3.8
-20.3.7
-20.3.6
-20.3.5
-20.3.4
-20.3.3
-20.3.2
-20.3.1
-20.3.0
-20.2.4
-20.2.3
-20.2.2
-20.2.1
-20.2.0
-20.1.7
-20.1.6
-20.1.5
-20.1.4
-20.1.3
-20.1.2
-20.1.1
-20.1.0
-20.0.5
-20.0.4
-20.0.3
-20.0.2
-20.0.1
-20.0.0
-19.3.6
-19.3.5
-19.3.4
-19.3.3
-19.3.2
-19.3.1
-19.3.0
-19.2.3
-19.2.2
-19.2.1
-19.2.0
-19.1.6
-19.1.5
-19.1.4
-19.1.3
-19.1.2
-19.1.1
-19.1.0
-19.0.7
-19.0.6
-19.0.5
-19.0.4
-19.0.3
-19.0.2
-19.0.1
-19.0.0
-18.3.4
-18.3.3
-18.3.2
-18.3.1
-18.3.0
-18.2.4
-18.2.3
-18.2.2
-18.2.1
-18.2.0
-18.1.5
-18.1.4
-18.1.3
-18.1.2
-18.1.1
-18.1.0
-18.0.3
-18.0.2
-18.0.1
-18.0.0
-17.5.6
-17.5.5
-17.5.4
-17.5.3
-17.5.2
-17.5.1
-17.5.0
-17.4.1
-17.4.0
-17.3.4
-17.3.3
-17.3.2
-17.3.1
-17.3.0
-17.2.2
-17.2.1
-17.2.0
-17.1.2
-17.1.1
-17.1.0
-17.0.2
-17.0.1
-17.0.0
diff --git a/src/install-elixir b/src/install-elixir
new file mode 100755
index 0000000..f767922
--- /dev/null
+++ b/src/install-elixir
@@ -0,0 +1,8 @@
+#!/bin/bash
+
+set -eo pipefail
+
+wget -q https://repo.hex.pm/builds/elixir/v${1}-otp-${2}.zip
+unzip -d .setup-elixir/elixir v${1}-otp-${2}.zip
+rm v${1}-otp-${2}.zip
+echo "::add-path::$(pwd)/.setup-elixir/elixir/bin"
diff --git a/src/install-elixir-ubuntu b/src/install-elixir-ubuntu
deleted file mode 100755
index 8e07c23..0000000
--- a/src/install-elixir-ubuntu
+++ /dev/null
@@ -1,13 +0,0 @@
-#!/bin/bash
-
-set -eo pipefail
-
-release=$(cat /etc/os-release | grep UBUNTU_CODENAME | cut -d= -f2)
-version=$1
-arch=$2
-file=elixir_$version-1~ubuntu~$release\_$arch.deb
-
-cd /tmp
-
-wget https://packages.erlang-solutions.com/erlang/debian/pool/$file
-sudo dpkg -i $file
\ No newline at end of file
diff --git a/src/install-otp b/src/install-otp
new file mode 100755
index 0000000..a5236ce
--- /dev/null
+++ b/src/install-otp
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+set -eo pipefail
+
+wget -q -O otp.tar.gz https://repo.hex.pm/builds/otp/ubuntu-14.04/OTP-${1}.tar.gz
+mkdir -p .setup-elixir/otp
+tar zxf otp.tar.gz -C .setup-elixir/otp --strip-components=1
+rm otp.tar.gz
+.setup-elixir/otp/Install -minimal $(pwd)/.setup-elixir/otp
+echo "::add-path::$(pwd)/.setup-elixir/otp/bin"
diff --git a/src/install-otp-ubuntu b/src/install-otp-ubuntu
deleted file mode 100755
index bc8cd4f..0000000
--- a/src/install-otp-ubuntu
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-
-set -eo pipefail
-
-release=$(lsb_release -cs)
-version=$1
-file=esl-erlang_$version-1~ubuntu~$release\_amd64.deb
-
-sudo apt-get install -y libwxbase3.0-0v5
-sudo apt-get install -y libwxgtk3.0-0v5
-sudo apt-get install -y libsctp1
-
-cd /tmp
-
-wget https://packages.erlang-solutions.com/erlang/debian/pool/$file
-sudo dpkg -i $file
\ No newline at end of file
diff --git a/src/installer.js b/src/installer.js
index f5dfa30..9b2bc51 100644
--- a/src/installer.js
+++ b/src/installer.js
@@ -8,14 +8,11 @@ module.exports = {installElixir, installOTP}
  * Install Elixir.
  *
  * @param {string} version
- * @param {string} arch
+ * @param {string} otpMajor
  */
-async function installElixir(version) {
-  let arch = 'all'
-  if (semver.gt('1.9.0', version)) arch = 'amd64'
-
+async function installElixir(version, otpMajor) {
   if (process.platform === 'linux') {
-    await exec(path.join(__dirname, 'install-elixir-ubuntu'), [version, arch])
+    await exec(path.join(__dirname, 'install-elixir'), [version, otpMajor])
   }
 }
 
@@ -26,7 +23,7 @@ async function installElixir(version) {
  */
 async function installOTP(version) {
   if (process.platform === 'linux') {
-    await exec(path.join(__dirname, 'install-otp-ubuntu'), [version])
+    await exec(path.join(__dirname, 'install-otp'), [version])
     return
   }
 
diff --git a/src/setup-elixir.js b/src/setup-elixir.js
index 247ccae..ba85c13 100644
--- a/src/setup-elixir.js
+++ b/src/setup-elixir.js
@@ -1,9 +1,9 @@
 const core = require('@actions/core')
 const {exec} = require('@actions/exec')
 const {installElixir, installOTP} = require('./installer')
-const {readFile} = require('fs').promises
 const path = require('path')
 const semver = require('semver')
+const https = require('https')
 
 main().catch(err => {
   core.setFailed(err.message)
@@ -14,14 +14,8 @@ async function main() {
 
   const otpSpec = core.getInput('otp-version', {required: true})
   const elixirSpec = core.getInput('elixir-version', {required: true})
-  const otpVersion = await getVersion(
-    otpSpec,
-    path.join(__dirname, 'erlang-versions.txt')
-  )
-  const elixirVersion = await getVersion(
-    elixirSpec,
-    path.join(__dirname, 'elixir-versions.txt')
-  )
+  const otpVersion = getVersionFromSpec(otpSpec, await getOtpVersions())
+  const [elixirVersion, otpMajor] = getElixirVersion(elixirSpec, await getElixirVersions(), otpVersion)
 
   let installHex = core.getInput('install-hex')
   installHex = installHex == null ? true : installHex
@@ -33,9 +27,10 @@ async function main() {
   console.log(`##[endgroup]`)
 
   console.log(`##[group]Installing Elixir ${elixirVersion}`)
-  await installElixir(elixirVersion)
+  await installElixir(elixirVersion, otpMajor)
   console.log(`##[endgroup]`)
 
+  process.env.PATH = `${process.cwd()}/.setup-elixir/elixir/bin:${process.env.PATH}`
   if (installRebar) await exec('mix local.rebar --force')
   if (installHex) await exec('mix local.hex --force')
 }
@@ -47,9 +42,62 @@ function checkPlatform() {
     )
 }
 
-async function getVersion(spec, versionFile) {
+function getElixirVersion(spec, versions, otpVersion) {
+  const version = getVersionFromSpec(spec, Array.from(versions.keys()))
+  const [otpMajor] = otpVersion.match(/^\d+/)
+
+  if (versions.get(version).includes(otpMajor)) {
+    return [version, otpMajor]
+  } else {
+    throw new Error(
+      `Elixir ${version} and OTP ${otpVersion} are incompatible`
+    )
+  }
+}
+
+function getVersionFromSpec(spec, versions) {
   const range = semver.validRange(spec)
-  const versions = (await readFile(versionFile)).toString().split('\n')
   const version = semver.maxSatisfying(versions, range)
   return version || spec
 }
+
+async function getOtpVersions() {
+  const result = await get("https://raw.githubusercontent.com/erlang/otp/master/otp_versions.table")
+
+  return result.trim().split('\n').map(line => {
+    const [_, version] = line.match(/^OTP-([\.\d]+)/)
+    return version
+  })
+}
+
+async function getElixirVersions() {
+  const result = await get("https://repo.hex.pm/builds/elixir/builds.txt")
+  const map = new Map()
+
+  result.trim().split('\n').forEach(line => {
+    const match = line.match(/^v(\d+\.\d+\.\d+)-otp-(\d+)/)
+
+    if (match) {
+      const [_, version, otp] = match
+      const array = (map.get(version) || [])
+      array.push(otp)
+      map.set(version, array)
+    }
+  })
+
+  return map
+}
+
+function get(url) {
+  return new Promise((resolve, reject) => {
+    const req = https.get(url)
+
+    req.on('response', res => {
+      let data = ''
+      res.on('data', (chunk) => { data += chunk })
+      res.on('end', () => { resolve(data) })
+    })
+
+    req.on('error', err => { reject(err) })
+  })
+}

From 71a9eee041935c78a267f96a76ee9121d15b06a1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20Meadows-J=C3=B6nsson?=
 <eric.meadows.jonsson@gmail.com>
Date: Sun, 17 Nov 2019 23:40:55 +0100
Subject: [PATCH 2/3] Support elixir branches

---
 .github/workflows/test.yml |  3 +++
 src/install-elixir         |  6 +++---
 src/installer.js           |  3 ++-
 src/setup-elixir.js        | 34 ++++++++++++++++++++++------------
 4 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2bb4c25..f09163b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,6 +18,9 @@ jobs:
           # Semver ranges
           - otp-version: 21.x
             elixir-version: <1.9.1
+          # Branches
+          - otp-version: 22.0
+            elixir-version: master
     steps:
       - uses: actions/checkout@v1.0.0
       - name: Use actions/setup-elixir
diff --git a/src/install-elixir b/src/install-elixir
index f767922..8fc616c 100755
--- a/src/install-elixir
+++ b/src/install-elixir
@@ -2,7 +2,7 @@
 
 set -eo pipefail
 
-wget -q https://repo.hex.pm/builds/elixir/v${1}-otp-${2}.zip
-unzip -d .setup-elixir/elixir v${1}-otp-${2}.zip
-rm v${1}-otp-${2}.zip
+wget -q https://repo.hex.pm/builds/elixir/${1}${2}.zip
+unzip -d .setup-elixir/elixir ${1}${2}.zip
+rm ${1}${2}.zip
 echo "::add-path::$(pwd)/.setup-elixir/elixir/bin"
diff --git a/src/installer.js b/src/installer.js
index 9b2bc51..7a55dbf 100644
--- a/src/installer.js
+++ b/src/installer.js
@@ -12,7 +12,8 @@ module.exports = {installElixir, installOTP}
  */
 async function installElixir(version, otpMajor) {
   if (process.platform === 'linux') {
-    await exec(path.join(__dirname, 'install-elixir'), [version, otpMajor])
+    const otpString = otpMajor ? `-otp-${otpMajor}` : ''
+    await exec(path.join(__dirname, 'install-elixir'), [version, otpString])
   }
 }
 
diff --git a/src/setup-elixir.js b/src/setup-elixir.js
index ba85c13..24e0b68 100644
--- a/src/setup-elixir.js
+++ b/src/setup-elixir.js
@@ -14,8 +14,8 @@ async function main() {
 
   const otpSpec = core.getInput('otp-version', {required: true})
   const elixirSpec = core.getInput('elixir-version', {required: true})
-  const otpVersion = getVersionFromSpec(otpSpec, await getOtpVersions())
-  const [elixirVersion, otpMajor] = getElixirVersion(elixirSpec, await getElixirVersions(), otpVersion)
+  const otpVersion = await getOtpVersion(otpSpec)
+  const [elixirVersion, otpMajor] = await getElixirVersion(elixirSpec, otpVersion)
 
   let installHex = core.getInput('install-hex')
   installHex = installHex == null ? true : installHex
@@ -42,23 +42,33 @@ function checkPlatform() {
     )
 }
 
-function getElixirVersion(spec, versions, otpVersion) {
-  const version = getVersionFromSpec(spec, Array.from(versions.keys()))
+async function getOtpVersion(spec) {
+  return getVersionFromSpec(spec, await getOtpVersions()) || spec
+}
+
+async function getElixirVersion(spec, otpVersion) {
+  const versions = await getElixirVersions()
+  const semverRegex = /^v(\d+\.\d+\.\d+)/
+
+  const semverVersions =
+    Array.from(versions.keys())
+      .filter(str => str.match(semverRegex))
+      .map(str => str.match(semverRegex)[1])
+
+  const version = getVersionFromSpec(spec, semverVersions)
+  const gitRef = version ? `v${version}` : spec
   const [otpMajor] = otpVersion.match(/^\d+/)
 
-  if (versions.get(version).includes(otpMajor)) {
-    return [version, otpMajor]
+  if (versions.get(gitRef).includes(otpMajor)) {
+    return [gitRef, otpMajor]
   } else {
-    throw new Error(
-      `Elixir ${version} and OTP ${otpVersion} are incompatible`
-    )
+    return [gitRef, null]
   }
 }
 
 function getVersionFromSpec(spec, versions) {
   const range = semver.validRange(spec)
-  const version = semver.maxSatisfying(versions, range)
-  return version || spec
+  return semver.maxSatisfying(versions, range)
 }
 
 async function getOtpVersions() {
@@ -75,7 +85,7 @@ async function getElixirVersions() {
   const map = new Map()
 
   result.trim().split('\n').forEach(line => {
-    const match = line.match(/^v(\d+\.\d+\.\d+)-otp-(\d+)/)
+    const match = line.match(/^(v\d+\.\d+\.\d+)-otp-(\d+)/) || line.match(/^([^-]+)-otp-(\d+)/)
 
     if (match) {
       const [_, version, otp] = match

From a12d5327a9ffff158146a4258e8416fd3db83e3f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Eric=20Meadows-J=C3=B6nsson?=
 <eric.meadows.jonsson@gmail.com>
Date: Tue, 19 Nov 2019 22:03:23 +0100
Subject: [PATCH 3/3] Check exact version match

---
 src/setup-elixir.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/setup-elixir.js b/src/setup-elixir.js
index 24e0b68..72a53be 100644
--- a/src/setup-elixir.js
+++ b/src/setup-elixir.js
@@ -67,8 +67,12 @@ async function getElixirVersion(spec, otpVersion) {
 }
 
 function getVersionFromSpec(spec, versions) {
-  const range = semver.validRange(spec)
-  return semver.maxSatisfying(versions, range)
+  if (versions.includes(spec)) {
+    return spec;
+  } else {
+    const range = semver.validRange(spec)
+    return semver.maxSatisfying(versions, range)
+  }
 }
 
 async function getOtpVersions() {