Cross compile cli on Scala 3 LTS & Next

Author: Gedochao

.github/scripts/build-linux-aarch64-from-docker.sh

@@ -11,7 +11,7 @@ eval "$(cs java --env --jvm temurin:17 --jvm-index https://github.com/coursier/j
 
 git config --global --add safe.directory "$(pwd)"
 
-./mill -i show cli.nativeImage
+./mill -i show 'cli[]'.nativeImage
 ./mill -i copyDefaultLauncher ./artifacts
 if "true" == $(./mill -i ci.shouldPublish); then
   .github/scripts/generate-os-packages.sh

.github/scripts/generate-docker-image.sh

@@ -5,7 +5,7 @@ ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
 WORKDIR="$ROOT/out/docker-workdir"
 
 mkdir -p "$WORKDIR"
-./mill -i copyTo cli.nativeImageStatic "$WORKDIR/scala-cli" 1>&2
+./mill -i copyTo 'cli[]'.nativeImageStatic "$WORKDIR/scala-cli" 1>&2
 
 cd "$WORKDIR"
 docker build -t scala-cli -f "$ROOT/.github/scripts/docker/ScalaCliDockerFile" .

.github/scripts/generate-native-image.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-COMMAND="cli.base-image.writeNativeImageScript"
+COMMAND="cli[].base-image.writeNativeImageScript"
 
 # temporary, until we pass JPMS options to native-image,
 # see https://www.graalvm.org/release-notes/22_2/#native-image
@@ -20,19 +20,19 @@ if [[ "$OSTYPE" == "msys" ]]; then
 else
   if [ $# == "0" ]; then
     if [[ "$OSTYPE" == "linux-gnu" ]]; then
-      COMMAND="cli.linux-docker-image.writeNativeImageScript"
+      COMMAND="cli[].linux-docker-image.writeNativeImageScript"
       CLEANUP=("sudo" "rm" "-rf" "out/cli/linux-docker-image/nativeImageDockerWorkingDir")
     else
       CLEANUP=("true")
     fi
   else
     case "$1" in
       "static")
-        COMMAND="cli.static-image.writeNativeImageScript"
+        COMMAND="cli[].static-image.writeNativeImageScript"
         CLEANUP=("sudo" "rm" "-rf" "out/cli/static-image/nativeImageDockerWorkingDir")
         ;;
       "mostly-static")
-        COMMAND="cli.mostly-static-image.writeNativeImageScript"
+        COMMAND="cli[].mostly-static-image.writeNativeImageScript"
         CLEANUP=("sudo" "rm" "-rf" "out/cli/mostly-static-image/nativeImageDockerWorkingDir")
         ;;
       *)

.github/scripts/generate-os-packages.sh

@@ -25,7 +25,7 @@ packager() {
 }
 
 launcher() {
-  local launcherMillCommand="cli.nativeImage"
+  local launcherMillCommand="cli[].nativeImage"
   local launcherName
 
   if [[ "${OS-}" == "Windows_NT" ]]; then

.github/scripts/generate-slim-docker-image.sh

@@ -5,7 +5,7 @@ ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
 WORKDIR="$ROOT/out/docker-slim-workdir"
 
 mkdir -p "$WORKDIR"
-./mill -i copyTo cli.nativeImageMostlyStatic "$WORKDIR/scala-cli" 1>&2
+./mill -i copyTo 'cli[]'.nativeImageMostlyStatic "$WORKDIR/scala-cli" 1>&2
 
 cd "$WORKDIR"
 docker build -t scala-cli-slim -f "$ROOT/.github/scripts/docker/ScalaCliSlimDockerFile" .

DEV.md

@@ -13,18 +13,29 @@ The Scala CLI sources ship with Mill launchers, so that Mill itself doesn't need
 
 #### Running the CLI from sources
 
+Run the `scala` target with Mill:
 ```bash
 ./mill -i scala …arguments…
 ```
 
+This is the equivalent of running the `cli` task with the default Scala version:
+```bash
+./mill -i 'cli[]'.run …arguments…
+```
+
 #### Debugging the CLI from sources
 
 ```bash
 ./mill -i debug debug-port …arguments…
 ```
+
+which is short for:
+```bash
+./mill -i 'cli[]'.debug debug-port …arguments…
+```
 E.g:
 ```bash
-./mill -i cli.debug 5050 ~/Main.scala -S 3.3.0
+./mill -i 'cli[]'.debug 5050 ~/Main.scala -S 3.3.0
 ```
 
 #### Run unit tests
@@ -129,7 +140,7 @@ Otherwise, some IDE features may not work correctly, i.e. the debugger might cra
 #### Generate a native launcher
 
 ```bash
-./mill -i show cli.nativeImage
+./mill -i show 'cli[]'.nativeImage
 ```
 
 This prints the path to the generated native image.
@@ -140,7 +151,7 @@ whether the files it points at exists or not.)
 #### Generate a JVM launcher
 
 ```bash
-./mill -i show cli.launcher
+./mill -i show 'cli[]'.launcher
 ```
 
 This prints the path to the generated launcher. This launcher is a JAR,
@@ -153,7 +164,7 @@ JVM one (see below).
 #### Generate a standalone JVM launcher
 
 ```bash
-./mill -i show cli.standaloneLauncher
+./mill -i show 'cli[]'.standaloneLauncher
 ```
 
 This prints the path to the generated launcher. This launcher is a JAR,
@@ -296,15 +307,15 @@ image.
 To generate the relevant configuration automatically, you can run:
 
 ```bash
-./mill -i cli.runWithAssistedConfig <scala-cli-sub-command> <args> <options>
+./mill -i 'cli[]'.runWithAssistedConfig <scala-cli-sub-command> <args> <options>
 ```
 
 Just make sure to run it exactly the same as the native image would have been run, as the configuration is generated for
 a particular invocation path. The run has to succeed as well, as the configuration will only be fully generated after an
 exit code 0.
 
 ```text
-Config generated in out/cli/runWithAssistedConfig.dest/config
+Config generated in out/cli/<scalaVersion>/runWithAssistedConfig.dest/config
 ```
 
 As a result, you should get the path to the generated configuration file. It might contain some unnecessary entries, so