Add standalone launcher for Scala CLI - MacOs/Linux (#185)

* Add standalone launcher for Scala CLI - macOs/linux

Author: lwronski

.github/workflows/ci.yml

@@ -340,6 +340,11 @@ jobs:
           KEYGRIP: ${{ secrets.KEYGRIP }}
           PGP_SECRET: ${{ secrets.PGP_SECRET }}
           GPG_EMAIL: ${{ secrets.GPG_EMAIL }}
+      - run: ./mill -i ci.updateStandaloneLauncher
+        if: env.SHOULD_PUBLISH == 'true'
+        env:
+          UPLOAD_GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
 
   website-nightly:
     needs: [jvm-tests, format, checks, reference-doc]

build.sc

@@ -595,14 +595,11 @@ def uploadLaunchers(directory: String = "artifacts") = T.command {
   val launchers = os.list(path).filter(os.isFile(_)).map { path =>
     path.toNIO -> path.last
   }
-  val ghToken = Option(System.getenv("UPLOAD_GH_TOKEN")).getOrElse {
-    sys.error("UPLOAD_GH_TOKEN not set")
-  }
   val (tag, overwriteAssets) =
     if (version.endsWith("-SNAPSHOT")) ("nightly", true)
     else ("v" + version, false)
   System.err.println(s"Uploading to tag $tag (overwrite assets: $overwriteAssets)")
-  Upload.upload(ghOrg, ghName, ghToken, tag, dryRun = false, overwrite = overwriteAssets)(
+  Upload.upload(ghOrg, ghName, ghToken(), tag, dryRun = false, overwrite = overwriteAssets)(
     launchers: _*
   )
 }
@@ -652,7 +649,9 @@ def copyStaticLauncher(directory: String = "artifacts") = T.command {
     suffix = "-static"
   )
 }
-
+private def ghToken(): String = Option(System.getenv("UPLOAD_GH_TOKEN")).getOrElse {
+  sys.error("UPLOAD_GH_TOKEN not set")
+}
 private def gitClone(repo: String, branch: String, workDir: os.Path) =
   os.proc("git", "clone", repo, "-q", "-b", branch).call(cwd = workDir)
 private def setupGithubRepo(repoDir: os.Path) = {
@@ -677,6 +676,32 @@ private def commitChanges(name: String, branch: String, repoDir: os.Path): Unit
 
 // TODO Move most CI-specific tasks there
 object ci extends Module {
+  def updateStandaloneLauncher() = T.command {
+    val version = cli.publishVersion()
+
+    val targetDir              = os.pwd / "target"
+    val scalaCliDir            = targetDir / "scala-cli"
+    val standaloneLauncherPath = scalaCliDir / "scala-cli.sh"
+
+    // clean target directory
+    if (os.exists(targetDir)) os.remove.all(targetDir)
+    os.makeDir.all(targetDir)
+
+    val branch = "master"
+    val repo   = s"https://oauth2:${ghToken()}@github.com/VirtusLab/scala-cli.git"
+
+    // Cloning
+    gitClone(repo, branch, targetDir)
+    setupGithubRepo(scalaCliDir)
+
+    val launcherScript       = os.read(standaloneLauncherPath)
+    val scalaCliVersionRegex = "SCALA_CLI_VERSION=\".*\"".r
+    val updatedLauncherScript =
+      scalaCliVersionRegex.replaceFirstIn(launcherScript, s"SCALA_CLI_VERSION=$version")
+    os.write.over(standaloneLauncherPath, updatedLauncherScript)
+
+    commitChanges(s"Update scala-cli.sh launcher for $version", branch, scalaCliDir)
+  }
   def updateBrewFormula() = T.command {
     val version = cli.publishVersion()
 

scala-cli.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+
+# This is the launcher script of Scala CLI (https://github.com/VirtusLab/scala-cli).
+# This script downloads and runs the Scala CLI version set by VERSION below.
+#
+# Download the latest version of this script at https://github.com/VirtusLab/scala-cli/raw/master/scala-cli.sh
+
+set -eu
+
+SCALA_CLI_VERSION="0.0.4"
+
+if [ "$(expr substr $(uname -s) 1 5 2>/dev/null)" == "Linux" ]; then
+  SCALA_CLI_URL="https://github.com/VirtusLab/scala-cli/releases/download/v$SCALA_CLI_VERSION/scala-cli-x86_64-pc-linux.gz"
+  CACHE_BASE="$HOME/.cache/coursier/v1"
+elif [ "$(uname)" == "Darwin" ]; then
+  SCALA_CLI_URL="https://github.com/VirtusLab/scala-cli/releases/download/v$SCALA_CLI_VERSION/scala-cli-x86_64-apple-darwin.gz"
+  CACHE_BASE="$HOME/Library/Caches/Coursier/v1"
+else
+   echo "This standalone scala-cli launcher is supported only in Linux and Darwin OS. If you are using Windows, please use the dedicated launcher scala-cli.bat"
+   exit 1
+fi
+
+CACHE_DEST="$CACHE_BASE/$(echo "$SCALA_CLI_URL" | sed 's@://@/@')"
+SCALA_CLI_BIN_PATH=${CACHE_DEST%.gz}
+
+if [ ! -f "$CACHE_DEST" ]; then
+  mkdir -p "$(dirname "$CACHE_DEST")"
+  TMP_DEST="$CACHE_DEST.tmp-setup"
+  echo "Downloading $SCALA_CLI_URL"
+  curl -fLo "$TMP_DEST" "$SCALA_CLI_URL"
+  mv "$TMP_DEST" "$CACHE_DEST"
+  gunzip -k "$CACHE_DEST"
+  chmod +x "$SCALA_CLI_BIN_PATH"
+fi
+
+exec "$SCALA_CLI_BIN_PATH" "$@"

website/docs/_advanced_install.mdx

@@ -183,7 +183,7 @@ move scala-cli.exe "%USERPROFILE%/scala-cli"
 
 Download MSI installer with Scala CLI for Windows
 
-<DownloadButton desc= 'Scala CLI for Windows' href='https://github.com/Virtuslab/scala-cli/releases/download/nightly/scala-cli-x86_64-pc-win32.msi'></DownloadButton>
+<DownloadButton desc= 'Scala CLI for Windows' href='https://github.com/Virtuslab/scala-cli/releases/download/nightly/scala-cli-x86_64-pc-win32.msi' width = '190px'></DownloadButton>
 
 </TabItem>
 </Tabs>
@@ -238,6 +238,35 @@ brew install Virtuslab/scala-cli/scala-cli
 
 </div></div>
 
+
+<SectionAbout title="Standalone launcher">
+    <div class="margin--lg"/>
+    <Tabs
+        defaultValue="macOS/Linux"
+        groupId="standalone-launcher"
+        values={[
+        {label: 'macOS/Linux', value: 'macOS/Linux'},
+        ]}
+    />
+</SectionAbout>
+
+<div className="row"><div className="col col--9 col--offset-1 padding--lg advanced_install_methods">
+
+Script to automatically download and cache standalone scala-cli launcher. 
+
+<Tabs groupId="launcher" 
+      defaultValue="macOS/Linux"
+      values={[
+        {label: 'macOS/Linux', value: 'macOS/Linux'},
+        ]}>
+<TabItem value="macOS/Linux">
+
+<DownloadButton desc= 'ScalaCLI launcher for macOs/Linux' href='https://github.com/VirtusLab/scala-cli/blob/master/scala-cli.sh' width = '250px' ></DownloadButton>
+</TabItem>
+</Tabs>
+</div></div>
+
+
 <SectionAbout title="Shell completions">
     <div class="margin--lg"/>
     <Tabs
@@ -266,8 +295,13 @@ scala-cli install completions
 
 If any of the `scala-cli install completions` command complained that your shell cannot be determined, specify it
 with `--shell`
-<Tabs groupId="shell-specific" defaultValue="bash">
-    <TabItem value="bash">
+<Tabs groupId="shell-specific" 
+      defaultValue="bash"
+      values={[
+        {label: 'Bash', value: 'bash'},
+        {label: 'zsh', value: 'zsh'},
+        ]}>
+<TabItem value="bash">
 
 ```bash
 scala-cli install completions --shell bash

website/src/components/DownloadButton.js

@@ -15,7 +15,7 @@ class DownloadButton extends React.Component {
   render() {
     return (
       <button 
-      style={{height: '55px', width : '190px', fontSize: 15,  borderRadius: '3px', color: '#fff', background: '#DC332D', borderColor: '#DC332D', fontWeight: 500 }}
+      style={{height: '55px', width : this.props.width, fontSize: 15,  borderRadius: '3px', color: '#fff', background: '#DC332D', borderColor: '#DC332D', fontWeight: 500 }}
       onClick={this.handleClick}
       >
         {this.props.desc}