From e2941de4387f6bf522b15c876f8e8ddcf050e080 Mon Sep 17 00:00:00 2001
From: Piotr Chabelski <ged.subfan@gmail.com>
Date: Tue, 15 Jul 2025 10:12:48 +0200
Subject: [PATCH 1/3] Update Mill scripts

---
 mill     | 381 ++++++++++++++++++++++++++++-------
 mill.bat | 598 +++++++++++++++++++++++++++----------------------------
 2 files changed, 611 insertions(+), 368 deletions(-)

diff --git a/mill b/mill
index 931612bef3..17ceb7f2e9 100755
--- a/mill
+++ b/mill
@@ -1,90 +1,333 @@
-#!/usr/bin/env bash
+#!/usr/bin/env sh
 
-# Adapted from
+# This is a wrapper script, that automatically selects or downloads Mill from Maven Central or GitHub release pages.
+#
+# This script determines the Mill version to use by trying these sources
+#   - env-variable `MILL_VERSION`
+#   - local file `.mill-version`
+#   - local file `.config/mill-version`
+#   - `mill-version` from YAML fronmatter of current buildfile
+#   - if accessible, find the latest stable version available on Maven Central (https://repo1.maven.org/maven2)
+#   - env-variable `DEFAULT_MILL_VERSION`
+#
+# If a version has the suffix '-native' a native binary will be used.
+# If a version has the suffix '-jvm' an executable jar file will be used, requiring an already installed Java runtime.
+# If no such suffix is found, the script will pick a default based on version and platform.
+#
+# Once a version was determined, it tries to use either
+#    - a system-installed mill, if found and it's version matches
+#    - an already downloaded version under ~/.cache/mill/download
+#
+# If no working mill version was found on the system,
+# this script downloads a binary file from Maven Central or Github Pages (this is version dependent)
+# into a cache location (~/.cache/mill/download).
+#
+# Mill Project URL: https://github.com/com-lihaoyi/mill
+# Script Version: 1.0.0-M1-21-7b6fae-DIRTY892b63e8
+#
+# If you want to improve this script, please also contribute your changes back!
+# This script was generated from: dist/scripts/src/mill.sh
+#
+# Licensed under the Apache License, Version 2.0
 
-coursier_version="2.1.24"
-COMMAND=$@
+set -e
 
-# necessary for Windows various shell environments
-IS_WINDOWS=$(uname | grep -E 'CYG*|MSYS*|MING*|UCRT*|ClANG*|GIT*')
+if [ "$1" = "--setup-completions" ] ; then
+  # Need to preserve the first position of those listed options
+  MILL_FIRST_ARG=$1
+  shift
+fi
 
-# https://stackoverflow.com/questions/3466166/how-to-check-if-running-in-cygwin-mac-or-linux/17072017#17072017
-if [ "$(expr substr $(uname -s) 1 5 2>/dev/null)" == "Linux" ]; then
-  if [ "$(uname -m)" == "aarch64" ]; then
-    cs_url="https://github.com/coursier/coursier/releases/download/v$coursier_version/cs-aarch64-pc-linux.gz"
-  else
-    cs_url="https://github.com/coursier/coursier/releases/download/v$coursier_version/cs-x86_64-pc-linux.gz"
-  fi
-  cache_base="$HOME/.cache/coursier/v1"
-elif [ "$(uname)" == "Darwin" ]; then
-  # TODO: remove once coursier-m1 and coursier mainline are merged
-  if [ "$(uname -p)" == "arm" ]; then 
-    cs_url="https://github.com/VirtusLab/coursier-m1/releases/download/v$coursier_version/cs-aarch64-apple-darwin.gz"
-  else 
-    cs_url="https://github.com/coursier/coursier/releases/download/v$coursier_version/cs-x86_64-apple-darwin.gz"
+if [ -z "${DEFAULT_MILL_VERSION}" ] ; then
+  DEFAULT_MILL_VERSION=1.0.0
+fi
+
+
+if [ -z "${GITHUB_RELEASE_CDN}" ] ; then
+  GITHUB_RELEASE_CDN=""
+fi
+
+
+MILL_REPO_URL="https://github.com/com-lihaoyi/mill"
+
+if [ -z "${CURL_CMD}" ] ; then
+  CURL_CMD=curl
+fi
+
+# Explicit commandline argument takes precedence over all other methods
+if [ "$1" = "--mill-version" ] ; then
+    echo "The --mill-version option is no longer supported." 1>&2
+fi
+
+MILL_BUILD_SCRIPT=""
+
+if [ -f "build.mill" ] ; then
+  MILL_BUILD_SCRIPT="build.mill"
+elif [ -f "build.mill.scala" ] ; then
+  MILL_BUILD_SCRIPT="build.mill.scala"
+elif [ -f "build.sc" ] ; then
+  MILL_BUILD_SCRIPT="build.sc"
+fi
+
+# Please note, that if a MILL_VERSION is already set in the environment,
+# We reuse it's value and skip searching for a value.
+
+# If not already set, read .mill-version file
+if [ -z "${MILL_VERSION}" ] ; then
+  if [ -f ".mill-version" ] ; then
+    MILL_VERSION="$(tr '\r' '\n' < .mill-version | head -n 1 2> /dev/null)"
+  elif [ -f ".config/mill-version" ] ; then
+    MILL_VERSION="$(tr '\r' '\n' < .config/mill-version | head -n 1 2> /dev/null)"
+  elif [ -n "${MILL_BUILD_SCRIPT}" ] ; then
+    MILL_VERSION="$(cat ${MILL_BUILD_SCRIPT} | grep '//[|]  *mill-version:  *' | sed 's;//|  *mill-version:  *;;')"
   fi
-  cache_base="$HOME/Library/Caches/Coursier/v1"
-else
-  # assuming Windows…
-  cs_url="https://github.com/coursier/coursier/releases/download/v$coursier_version/cs-x86_64-pc-win32.zip"
-  cache_base="$LOCALAPPDATA/Coursier/v1" # TODO Check that
-  ext=".exe"
-  do_chmod="0"
 fi
 
-cache_dest="$cache_base/$(echo "$cs_url" | sed 's@://@/@')"
+MILL_USER_CACHE_DIR="${XDG_CACHE_HOME:-${HOME}/.cache}/mill"
 
-if [ ! -f "$cache_dest" ]; then
-  mkdir -p "$(dirname "$cache_dest")"
-  tmp_dest="$cache_dest.tmp-setup"
-  echo "Downloading $cs_url"
-  curl -fLo "$tmp_dest" "$cs_url"
-  mv "$tmp_dest" "$cache_dest"
+if [ -z "${MILL_DOWNLOAD_PATH}" ] ; then
+  MILL_DOWNLOAD_PATH="${MILL_USER_CACHE_DIR}/download"
 fi
 
-if [[ "$cache_dest" == *.gz ]]; then
-  cs="$(dirname "$cache_dest")/$(basename "$cache_dest" .gz)"
-  if [ ! -f "$cs" ]; then
-    gzip -d < "$cache_dest" > "$cs"
+# If not already set, try to fetch newest from Github
+if [ -z "${MILL_VERSION}" ] ; then
+  # TODO: try to load latest version from release page
+  echo "No mill version specified." 1>&2
+  echo "You should provide a version via a '//| mill-version: ' comment or a '.mill-version' file." 1>&2
+
+  mkdir -p "${MILL_DOWNLOAD_PATH}"
+  LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest" 2>/dev/null || (
+    # we might be on OSX or BSD which don't have -d option for touch
+    # but probably a -A [-][[hh]mm]SS
+    touch "${MILL_DOWNLOAD_PATH}/.expire_latest"; touch -A -010000 "${MILL_DOWNLOAD_PATH}/.expire_latest"
+  ) || (
+    # in case we still failed, we retry the first touch command with the intention
+    # to show the (previously suppressed) error message
+    LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest"
+  )
+
+  # POSIX shell variant of bash's -nt operator, see https://unix.stackexchange.com/a/449744/6993
+  # if [ "${MILL_DOWNLOAD_PATH}/.latest" -nt "${MILL_DOWNLOAD_PATH}/.expire_latest" ] ; then
+  if [ -n "$(find -L "${MILL_DOWNLOAD_PATH}/.latest" -prune -newer "${MILL_DOWNLOAD_PATH}/.expire_latest")" ]; then
+    # we know a current latest version
+    MILL_VERSION=$(head -n 1 "${MILL_DOWNLOAD_PATH}"/.latest 2> /dev/null)
   fi
-  if [ ! -x "$cs" ]; then
-    chmod +x "$cs"
+
+  if [ -z "${MILL_VERSION}" ] ; then
+    # we don't know a current latest version
+    echo "Retrieving latest mill version ..." 1>&2
+    LANG=C ${CURL_CMD} -s -i -f -I ${MILL_REPO_URL}/releases/latest 2> /dev/null  | grep --ignore-case Location: | sed s'/^.*tag\///' | tr -d '\r\n' > "${MILL_DOWNLOAD_PATH}/.latest"
+    MILL_VERSION=$(head -n 1 "${MILL_DOWNLOAD_PATH}"/.latest 2> /dev/null)
   fi
-elif [[ "$cache_dest" == *.zip ]]; then
-  cs="$(dirname "$cache_dest")/$(basename "$cache_dest" .zip).exe"
-  if [ ! -f "$cs" ]; then
-    unzip -p "$cache_dest" "$(basename "$cache_dest" .zip).exe" > "$cs"
+
+  if [ -z "${MILL_VERSION}" ] ; then
+    # Last resort
+    MILL_VERSION="${DEFAULT_MILL_VERSION}"
+    echo "Falling back to hardcoded mill version ${MILL_VERSION}" 1>&2
+  else
+    echo "Using mill version ${MILL_VERSION}" 1>&2
   fi
 fi
 
-# If cs is not a valid file, fall back to the `cs` command in PATH
-if [ ! -f "$cs" ]; then
-  cs="$(command -v cs)"
-fi
+MILL_NATIVE_SUFFIX="-native"
+MILL_JVM_SUFFIX="-jvm"
+FULL_MILL_VERSION=$MILL_VERSION
+ARTIFACT_SUFFIX=""
+set_artifact_suffix(){
+  if [ "$(expr substr $(uname -s) 1 5 2>/dev/null)" = "Linux" ]; then
+    if [ "$(uname -m)" = "aarch64" ]; then
+      ARTIFACT_SUFFIX="-native-linux-aarch64"
+    else
+      ARTIFACT_SUFFIX="-native-linux-amd64"
+    fi
+  elif [ "$(uname)" = "Darwin" ]; then
+    if [ "$(uname -m)" = "arm64" ]; then
+      ARTIFACT_SUFFIX="-native-mac-aarch64"
+    else
+      ARTIFACT_SUFFIX="-native-mac-amd64"
+    fi
+  else
+     echo "This native mill launcher supports only Linux and macOS." 1>&2
+     exit 1
+  fi
+}
+
+case "$MILL_VERSION" in
+    *"$MILL_NATIVE_SUFFIX")
+  MILL_VERSION=${MILL_VERSION%"$MILL_NATIVE_SUFFIX"}
+  set_artifact_suffix
+  ;;
+
+    *"$MILL_JVM_SUFFIX")
+    MILL_VERSION=${MILL_VERSION%"$MILL_JVM_SUFFIX"}
+  ;;
+
+    *)
+  case "$MILL_VERSION" in
+    0.1.*) ;;
+    0.2.*) ;;
+    0.3.*) ;;
+    0.4.*) ;;
+    0.5.*) ;;
+    0.6.*) ;;
+    0.7.*) ;;
+    0.8.*) ;;
+    0.9.*) ;;
+    0.10.*) ;;
+    0.11.*) ;;
+    0.12.*) ;;
+    *)
+      set_artifact_suffix
+  esac
+  ;;
+esac
 
-function to_bash_syntax {
-  local S
-  for S in "$@" ; do
-    echo "$S" | sed -E -e 's#^set #export #' -e 's#%([A-Z_][A-Z_0-9]*)%#${\1}#g' | tr '\\' '/'
-  done
+MILL="${MILL_DOWNLOAD_PATH}/$MILL_VERSION$ARTIFACT_SUFFIX"
+
+try_to_use_system_mill() {
+  if [ "$(uname)" != "Linux" ]; then
+    return 0
+  fi
+
+  MILL_IN_PATH="$(command -v mill || true)"
+
+  if [ -z "${MILL_IN_PATH}" ]; then
+    return 0
+  fi
+
+  SYSTEM_MILL_FIRST_TWO_BYTES=$(head --bytes=2 "${MILL_IN_PATH}")
+  if [ "${SYSTEM_MILL_FIRST_TWO_BYTES}" = "#!" ]; then
+	  # MILL_IN_PATH is (very likely) a shell script and not the mill
+	  # executable, ignore it.
+	  return 0
+  fi
+
+  SYSTEM_MILL_PATH=$(readlink -e "${MILL_IN_PATH}")
+  SYSTEM_MILL_SIZE=$(stat --format=%s "${SYSTEM_MILL_PATH}")
+  SYSTEM_MILL_MTIME=$(stat --format=%y "${SYSTEM_MILL_PATH}")
+
+  if [ ! -d "${MILL_USER_CACHE_DIR}" ]; then
+    mkdir -p "${MILL_USER_CACHE_DIR}"
+  fi
+
+  SYSTEM_MILL_INFO_FILE="${MILL_USER_CACHE_DIR}/system-mill-info"
+  if [ -f "${SYSTEM_MILL_INFO_FILE}" ]; then
+    parseSystemMillInfo() {
+        LINE_NUMBER="${1}"
+        # Select the line number of the SYSTEM_MILL_INFO_FILE, cut the
+        # variable definition in that line in two halves and return
+        # the value, and finally remove the quotes.
+        sed -n "${LINE_NUMBER}p" "${SYSTEM_MILL_INFO_FILE}" |\
+            cut -d= -f2 |\
+            sed 's/"\(.*\)"/\1/'
+    }
+
+    CACHED_SYSTEM_MILL_PATH=$(parseSystemMillInfo 1)
+    CACHED_SYSTEM_MILL_VERSION=$(parseSystemMillInfo 2)
+    CACHED_SYSTEM_MILL_SIZE=$(parseSystemMillInfo 3)
+    CACHED_SYSTEM_MILL_MTIME=$(parseSystemMillInfo 4)
+
+    if [ "${SYSTEM_MILL_PATH}" = "${CACHED_SYSTEM_MILL_PATH}" ] \
+           && [ "${SYSTEM_MILL_SIZE}" = "${CACHED_SYSTEM_MILL_SIZE}" ] \
+           && [ "${SYSTEM_MILL_MTIME}" = "${CACHED_SYSTEM_MILL_MTIME}" ]; then
+      if [ "${CACHED_SYSTEM_MILL_VERSION}" = "${MILL_VERSION}" ]; then
+          MILL="${SYSTEM_MILL_PATH}"
+          return 0
+      else
+          return 0
+      fi
+    fi
+  fi
+
+  SYSTEM_MILL_VERSION=$(${SYSTEM_MILL_PATH} --version | head -n1 | sed -n 's/^Mill.*version \(.*\)/\1/p')
+
+  cat <<EOF > "${SYSTEM_MILL_INFO_FILE}"
+CACHED_SYSTEM_MILL_PATH="${SYSTEM_MILL_PATH}"
+CACHED_SYSTEM_MILL_VERSION="${SYSTEM_MILL_VERSION}"
+CACHED_SYSTEM_MILL_SIZE="${SYSTEM_MILL_SIZE}"
+CACHED_SYSTEM_MILL_MTIME="${SYSTEM_MILL_MTIME}"
+EOF
+
+  if [ "${SYSTEM_MILL_VERSION}" = "${MILL_VERSION}" ]; then
+    MILL="${SYSTEM_MILL_PATH}"
+  fi
 }
-if [[ $IS_WINDOWS ]]; then
-  # needed for coursier version < 2.1.8, harmless otherwise
-  IFS=$'\n'
-  eval "$(to_bash_syntax `"$cs" java --env --jvm temurin:17` || to_bash_syntax `"$cs" java --env --jvm openjdk:1.17.0`)"
-  unset IFS
-else
-  eval "$("$cs" java --env --jvm temurin:17 || "$cs" java --env --jvm openjdk:1.17.0)"
-fi
+try_to_use_system_mill
+
+# If not already downloaded, download it
+if [ ! -s "${MILL}" ] || [ "$MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT" = "1" ] ; then
+  case $MILL_VERSION in
+    0.0.* | 0.1.* | 0.2.* | 0.3.* | 0.4.* )
+      DOWNLOAD_SUFFIX=""
+      DOWNLOAD_FROM_MAVEN=0
+      ;;
+    0.5.* | 0.6.* | 0.7.* | 0.8.* | 0.9.* | 0.10.* | 0.11.0-M* )
+      DOWNLOAD_SUFFIX="-assembly"
+      DOWNLOAD_FROM_MAVEN=0
+      ;;
+    *)
+      DOWNLOAD_SUFFIX="-assembly"
+      DOWNLOAD_FROM_MAVEN=1
+      ;;
+  esac
+  case $MILL_VERSION in
+    0.12.0 | 0.12.1 | 0.12.2 | 0.12.3 | 0.12.4 | 0.12.5 | 0.12.6 | 0.12.7 | 0.12.8 | 0.12.9 | 0.12.10 | 0.12.11 )
+      DOWNLOAD_EXT="jar"
+      ;;
+    0.12.* )
+      DOWNLOAD_EXT="exe"
+      ;;
+    0.* )
+      DOWNLOAD_EXT="jar"
+      ;;
+    *)
+      DOWNLOAD_EXT="exe"
+      ;;
+  esac
+
+  DOWNLOAD_FILE=$(mktemp mill.XXXXXX)
+  if [ "$DOWNLOAD_FROM_MAVEN" = "1" ] ; then
+    DOWNLOAD_URL="https://repo1.maven.org/maven2/com/lihaoyi/mill-dist${ARTIFACT_SUFFIX}/${MILL_VERSION}/mill-dist${ARTIFACT_SUFFIX}-${MILL_VERSION}.${DOWNLOAD_EXT}"
+  else
+    MILL_VERSION_TAG=$(echo "$MILL_VERSION" | sed -E 's/([^-]+)(-M[0-9]+)?(-.*)?/\1\2/')
+    DOWNLOAD_URL="${GITHUB_RELEASE_CDN}${MILL_REPO_URL}/releases/download/${MILL_VERSION_TAG}/${MILL_VERSION}${DOWNLOAD_SUFFIX}"
+    unset MILL_VERSION_TAG
+  fi
 
-# temporary, until we pass JPMS options to native-image,
-# see https://www.graalvm.org/release-notes/22_2/#native-image
-export USE_NATIVE_IMAGE_JAVA_PLATFORM_MODULE_SYSTEM=false
+  if [ "$MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT" = "1" ] ; then
+    echo $DOWNLOAD_URL
+    echo $MILL
+    exit 0
+  fi
+  # TODO: handle command not found
+  echo "Downloading mill ${MILL_VERSION} from ${DOWNLOAD_URL} ..." 1>&2
+  ${CURL_CMD} -f -L -o "${DOWNLOAD_FILE}" "${DOWNLOAD_URL}"
+  chmod +x "${DOWNLOAD_FILE}"
+  mkdir -p "${MILL_DOWNLOAD_PATH}"
+  mv "${DOWNLOAD_FILE}" "${MILL}"
 
-DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
+  unset DOWNLOAD_FILE
+  unset DOWNLOAD_SUFFIX
+fi
 
-if [[ $IS_WINDOWS ]]; then
-  exec "$DIR/millw" "$@"
-else
-  exec "$DIR/millw" $COMMAND
+if [ -z "$MILL_MAIN_CLI" ] ; then
+  MILL_MAIN_CLI="${0}"
 fi
+
+MILL_FIRST_ARG=""
+if [ "$1" = "--bsp" ] || [ "${1#"-i"}" != "$1" ] || [ "$1" = "--interactive" ] || [ "$1" = "--no-server" ] || [ "$1" = "--no-daemon" ] || [ "$1" = "--repl" ] || [ "$1" = "--help" ] ; then
+  # Need to preserve the first position of those listed options
+  MILL_FIRST_ARG=$1
+  shift
+fi
+
+unset MILL_DOWNLOAD_PATH
+unset MILL_OLD_DOWNLOAD_PATH
+unset OLD_MILL
+unset MILL_VERSION
+unset MILL_REPO_URL
+
+# -D mill.main.cli is for compatibility with Mill 0.10.9 - 0.13.0-M2
+# We don't quote MILL_FIRST_ARG on purpose, so we can expand the empty value without quotes
+# shellcheck disable=SC2086
+exec "${MILL}" $MILL_FIRST_ARG -D "mill.main.cli=${MILL_MAIN_CLI}" "$@"
diff --git a/mill.bat b/mill.bat
index 0d7e1e19fd..a947595a25 100755
--- a/mill.bat
+++ b/mill.bat
@@ -1,299 +1,299 @@
-@echo off
-
-rem This is a wrapper script, that automatically selects or downloads Mill from Maven Central or GitHub release pages.
-rem
-rem This script determines the Mill version to use by trying these sources
-rem   - env-variable `MILL_VERSION`
-rem   - local file `.mill-version`
-rem   - local file `.config/mill-version`
-rem   - `mill-version` from YAML fronmatter of current buildfile
-rem   - if accessible, find the latest stable version available on Maven Central (https://repo1.maven.org/maven2)
-rem   - env-variable `DEFAULT_MILL_VERSION`
-rem
-rem If a version has the suffix '-native' a native binary will be used.
-rem If a version has the suffix '-jvm' an executable jar file will be used, requiring an already installed Java runtime.
-rem If no such suffix is found, the script will pick a default based on version and platform.
-rem
-rem Once a version was determined, it tries to use either
-rem    - a system-installed mill, if found and it's version matches
-rem    - an already downloaded version under %USERPROFILE%\.mill\download
-rem
-rem If no working mill version was found on the system,
-rem this script downloads a binary file from Maven Central or Github Pages (this is version dependent)
-rem into a cache location (%USERPROFILE%\.mill\download).
-rem
-rem Mill Project URL: https://github.com/com-lihaoyi/mill
-rem Script Version: 1.0.0-M1-21-7b6fae-DIRTY892b63e8
-rem
-rem If you want to improve this script, please also contribute your changes back!
-rem This script was generated from: dist/scripts/src/mill.bat
-rem
-rem Licensed under the Apache License, Version 2.0
-
-rem setlocal seems to be unavailable on Windows 95/98/ME
-rem but I don't think we need to support them in 2019
-setlocal enabledelayedexpansion
-
-if [!DEFAULT_MILL_VERSION!]==[] ( set "DEFAULT_MILL_VERSION=0.12.14" )
-
-if [!MILL_GITHUB_RELEASE_CDN!]==[] ( set "MILL_GITHUB_RELEASE_CDN=" )
-
-if [!MILL_MAIN_CLI!]==[] ( set "MILL_MAIN_CLI=%~f0" )
-
-set "MILL_REPO_URL=https://github.com/com-lihaoyi/mill"
-
-SET MILL_BUILD_SCRIPT=
-
-if exist "build.mill" (
-  set MILL_BUILD_SCRIPT=build.mill
-) else (
-    if exist "build.mill.scala" (
-      set MILL_BUILD_SCRIPT=build.mill.scala
-    ) else (
-        if exist "build.sc" (
-          set MILL_BUILD_SCRIPT=build.sc
-        ) else (
-            rem no-op
-        )
-    )
-)
-
-if [!MILL_VERSION!]==[] (
-  if exist .mill-version (
-    set /p MILL_VERSION=<.mill-version
-  ) else (
-    if exist .config\mill-version (
-      set /p MILL_VERSION=<.config\mill-version
-    ) else (
-      if not "%MILL_BUILD_SCRIPT%"=="" (
-        for /f "tokens=1-2*" %%a in ('findstr /C:"//| mill-version:" %MILL_BUILD_SCRIPT%') do (
-          set "MILL_VERSION=%%c"
-        )
-      ) else (
-        rem no-op
-      )
-    )
-  )
-)
-
-if [!MILL_VERSION!]==[] set MILL_VERSION=%DEFAULT_MILL_VERSION%
-
-if [!MILL_DOWNLOAD_PATH!]==[] set MILL_DOWNLOAD_PATH=%USERPROFILE%\.mill\download
-
-rem without bat file extension, cmd doesn't seem to be able to run it
-
-set "MILL_NATIVE_SUFFIX=-native"
-set "MILL_JVM_SUFFIX=-jvm"
-set "FULL_MILL_VERSION=%MILL_VERSION%"
-set "MILL_EXT=.bat"
-set "ARTIFACT_SUFFIX="
-REM Check if MILL_VERSION contains MILL_NATIVE_SUFFIX
-echo !MILL_VERSION! | findstr /C:"%MILL_NATIVE_SUFFIX%" >nul
-if !errorlevel! equ 0 (
-    set "MILL_VERSION=%MILL_VERSION:-native=%"
-    REM -native images compiled with graal do not support windows-arm
-    REM https://github.com/oracle/graal/issues/9215
-    IF /I NOT "%PROCESSOR_ARCHITECTURE%"=="ARM64" (
-        set "ARTIFACT_SUFFIX=-native-windows-amd64"
-        set "MILL_EXT=.exe"
-    ) else (
-        rem no-op
-    )
-) else (
-    echo !MILL_VERSION! | findstr /C:"%MILL_JVM_SUFFIX%" >nul
-    if !errorlevel! equ 0 (
-        set "MILL_VERSION=%MILL_VERSION:-jvm=%"
-    ) else (
-        set "SKIP_VERSION=false"
-        set "MILL_PREFIX=%MILL_VERSION:~0,4%"
-        if "!MILL_PREFIX!"=="0.1." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.2." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.3." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.4." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.5." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.6." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.7." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.8." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.9." set "SKIP_VERSION=true"
-        set "MILL_PREFIX=%MILL_VERSION:~0,5%"
-        if "!MILL_PREFIX!"=="0.10." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.11." set "SKIP_VERSION=true"
-        if "!MILL_PREFIX!"=="0.12." set "SKIP_VERSION=true"
-
-        if "!SKIP_VERSION!"=="false" (
-            IF /I NOT "%PROCESSOR_ARCHITECTURE%"=="ARM64" (
-                set "ARTIFACT_SUFFIX=-native-windows-amd64"
-                set "MILL_EXT=.exe"
-            )
-        ) else (
-            rem no-op
-        )
-    )
-)
-
-set MILL=%MILL_DOWNLOAD_PATH%\!FULL_MILL_VERSION!!MILL_EXT!
-
-set MILL_RESOLVE_DOWNLOAD=
-
-if not exist "%MILL%" (
-  set MILL_RESOLVE_DOWNLOAD=true
-) else (
-    if defined MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT (
-        set MILL_RESOLVE_DOWNLOAD=true
-    ) else (
-        rem no-op
-    )
-)
-
-
-if [!MILL_RESOLVE_DOWNLOAD!]==[true] (
-    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,4%
-    set MILL_SHORT_VERSION_PREFIX=%MILL_VERSION:~0,2%
-    rem Since 0.5.0
-    set MILL_DOWNLOAD_SUFFIX=-assembly
-    rem Since 0.11.0
-    set MILL_DOWNLOAD_FROM_MAVEN=1
-    if [!MILL_VERSION_PREFIX!]==[0.0.] (
-        set MILL_DOWNLOAD_SUFFIX=
-        set MILL_DOWNLOAD_FROM_MAVEN=0
-    )
-    if [!MILL_VERSION_PREFIX!]==[0.1.] (
-        set MILL_DOWNLOAD_SUFFIX=
-        set MILL_DOWNLOAD_FROM_MAVEN=0
-    )
-    if [!MILL_VERSION_PREFIX!]==[0.2.] (
-        set MILL_DOWNLOAD_SUFFIX=
-        set MILL_DOWNLOAD_FROM_MAVEN=0
-    )
-    if [!MILL_VERSION_PREFIX!]==[0.3.] (
-        set MILL_DOWNLOAD_SUFFIX=
-        set MILL_DOWNLOAD_FROM_MAVEN=0
-    )
-    if [!MILL_VERSION_PREFIX!]==[0.4.] (
-        set MILL_DOWNLOAD_SUFFIX=
-        set MILL_DOWNLOAD_FROM_MAVEN=0
-    )
-    if [!MILL_VERSION_PREFIX!]==[0.5.] set MILL_DOWNLOAD_FROM_MAVEN=0
-    if [!MILL_VERSION_PREFIX!]==[0.6.] set MILL_DOWNLOAD_FROM_MAVEN=0
-    if [!MILL_VERSION_PREFIX!]==[0.7.] set MILL_DOWNLOAD_FROM_MAVEN=0
-    if [!MILL_VERSION_PREFIX!]==[0.8.] set MILL_DOWNLOAD_FROM_MAVEN=0
-    if [!MILL_VERSION_PREFIX!]==[0.9.] set MILL_DOWNLOAD_FROM_MAVEN=0
-
-    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,5%
-    if [!MILL_VERSION_PREFIX!]==[0.10.] set MILL_DOWNLOAD_FROM_MAVEN=0
-
-    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,8%
-    if [!MILL_VERSION_PREFIX!]==[0.11.0-M] set MILL_DOWNLOAD_FROM_MAVEN=0
-
-    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,5%
-    set DOWNLOAD_EXT=exe
-    if [!MILL_SHORT_VERSION_PREFIX!]==[0.] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION_PREFIX!]==[0.12.] set DOWNLOAD_EXT=exe
-    if [!MILL_VERSION!]==[0.12.0] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.1] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.2] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.3] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.4] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.5] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.6] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.7] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.8] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.9] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.10] set DOWNLOAD_EXT=jar
-    if [!MILL_VERSION!]==[0.12.11] set DOWNLOAD_EXT=jar
-
-    set MILL_VERSION_PREFIX=
-    set MILL_SHORT_VERSION_PREFIX=
-
-    for /F "delims=- tokens=1" %%A in ("!MILL_VERSION!") do set MILL_VERSION_BASE=%%A
-    set MILL_VERSION_MILESTONE=
-    for /F "delims=- tokens=2" %%A in ("!MILL_VERSION!") do set MILL_VERSION_MILESTONE=%%A
-    set MILL_VERSION_MILESTONE_START=!MILL_VERSION_MILESTONE:~0,1!
-    if [!MILL_VERSION_MILESTONE_START!]==[M] (
-        set MILL_VERSION_TAG=!MILL_VERSION_BASE!-!MILL_VERSION_MILESTONE!
-    ) else (
-        set MILL_VERSION_TAG=!MILL_VERSION_BASE!
-    )
-    if [!MILL_DOWNLOAD_FROM_MAVEN!]==[1] (
-        set MILL_DOWNLOAD_URL=https://repo1.maven.org/maven2/com/lihaoyi/mill-dist!ARTIFACT_SUFFIX!/!MILL_VERSION!/mill-dist!ARTIFACT_SUFFIX!-!MILL_VERSION!.!DOWNLOAD_EXT!
-    ) else (
-        set MILL_DOWNLOAD_URL=!MILL_GITHUB_RELEASE_CDN!%MILL_REPO_URL%/releases/download/!MILL_VERSION_TAG!/!MILL_VERSION!!MILL_DOWNLOAD_SUFFIX!
-    )
-
-    if defined MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT (
-        echo !MILL_DOWNLOAD_URL!
-        echo !MILL!
-        exit /b 0
-    )
-
-    rem there seems to be no way to generate a unique temporary file path (on native Windows)
-    set MILL_DOWNLOAD_FILE=%MILL%.tmp
-
-    echo Downloading mill !MILL_VERSION! from !MILL_DOWNLOAD_URL! ... 1>&2
-
-    if not exist "%MILL_DOWNLOAD_PATH%" mkdir "%MILL_DOWNLOAD_PATH%"
-    rem curl is bundled with recent Windows 10
-    rem but I don't think we can expect all the users to have it in 2019
-    where /Q curl
-    if !ERRORLEVEL! EQU 0 (
-        curl -f -L "!MILL_DOWNLOAD_URL!" -o "!MILL_DOWNLOAD_FILE!"
-    ) else (
-        rem bitsadmin seems to be available on Windows 7
-        rem without /dynamic, github returns 403
-        rem bitsadmin is sometimes needlessly slow but it looks better with /priority foreground
-        bitsadmin /transfer millDownloadJob /dynamic /priority foreground "!MILL_DOWNLOAD_URL!" "!MILL_DOWNLOAD_FILE!"
-    )
-    if not exist "!MILL_DOWNLOAD_FILE!" (
-        echo Could not download mill !MILL_VERSION! 1>&2
-        exit /b 1
-    )
-
-    move /y "!MILL_DOWNLOAD_FILE!" "%MILL%"
-
-    set MILL_DOWNLOAD_FILE=
-    set MILL_DOWNLOAD_SUFFIX=
-)
-
-set MILL_DOWNLOAD_PATH=
-set MILL_VERSION=
-set MILL_REPO_URL=
-
-rem Need to preserve the first position of those listed options
-set MILL_FIRST_ARG=
-if [%~1%]==[--bsp] (
-  set MILL_FIRST_ARG=%1%
-) else (
-  if [%~1%]==[-i] (
-    set MILL_FIRST_ARG=%1%
-  ) else (
-    if [%~1%]==[--interactive] (
-      set MILL_FIRST_ARG=%1%
-    ) else (
-      if [%~1%]==[--no-server] (
-        set MILL_FIRST_ARG=%1%
-      ) else (
-        if [%~1%]==[--no-daemon] (
-          set MILL_FIRST_ARG=%1%
-        ) else (
-          if [%~1%]==[--repl] (
-            set MILL_FIRST_ARG=%1%
-          ) else (
-            if [%~1%]==[--help] (
-              set MILL_FIRST_ARG=%1%
-            )
-          )
-        )
-      )
-    )
-  )
-)
-set "MILL_PARAMS=%*%"
-
-if not [!MILL_FIRST_ARG!]==[] (
-  for /f "tokens=1*" %%a in ("%*") do (
-    set "MILL_PARAMS=%%b"
-  )
-)
-
-rem -D mill.main.cli is for compatibility with Mill 0.10.9 - 0.13.0-M2
-"%MILL%" %MILL_FIRST_ARG% -D "mill.main.cli=%MILL_MAIN_CLI%" %MILL_PARAMS%
\ No newline at end of file
+@echo off
+
+rem This is a wrapper script, that automatically selects or downloads Mill from Maven Central or GitHub release pages.
+rem
+rem This script determines the Mill version to use by trying these sources
+rem   - env-variable `MILL_VERSION`
+rem   - local file `.mill-version`
+rem   - local file `.config/mill-version`
+rem   - `mill-version` from YAML fronmatter of current buildfile
+rem   - if accessible, find the latest stable version available on Maven Central (https://repo1.maven.org/maven2)
+rem   - env-variable `DEFAULT_MILL_VERSION`
+rem
+rem If a version has the suffix '-native' a native binary will be used.
+rem If a version has the suffix '-jvm' an executable jar file will be used, requiring an already installed Java runtime.
+rem If no such suffix is found, the script will pick a default based on version and platform.
+rem
+rem Once a version was determined, it tries to use either
+rem    - a system-installed mill, if found and it's version matches
+rem    - an already downloaded version under %USERPROFILE%\.mill\download
+rem
+rem If no working mill version was found on the system,
+rem this script downloads a binary file from Maven Central or Github Pages (this is version dependent)
+rem into a cache location (%USERPROFILE%\.mill\download).
+rem
+rem Mill Project URL: https://github.com/com-lihaoyi/mill
+rem Script Version: 1.0.0-M1-21-7b6fae-DIRTY892b63e8
+rem
+rem If you want to improve this script, please also contribute your changes back!
+rem This script was generated from: dist/scripts/src/mill.bat
+rem
+rem Licensed under the Apache License, Version 2.0
+
+rem setlocal seems to be unavailable on Windows 95/98/ME
+rem but I don't think we need to support them in 2019
+setlocal enabledelayedexpansion
+
+if [!DEFAULT_MILL_VERSION!]==[] ( set "DEFAULT_MILL_VERSION=1.0.0" )
+
+if [!MILL_GITHUB_RELEASE_CDN!]==[] ( set "MILL_GITHUB_RELEASE_CDN=" )
+
+if [!MILL_MAIN_CLI!]==[] ( set "MILL_MAIN_CLI=%~f0" )
+
+set "MILL_REPO_URL=https://github.com/com-lihaoyi/mill"
+
+SET MILL_BUILD_SCRIPT=
+
+if exist "build.mill" (
+  set MILL_BUILD_SCRIPT=build.mill
+) else (
+    if exist "build.mill.scala" (
+      set MILL_BUILD_SCRIPT=build.mill.scala
+    ) else (
+        if exist "build.sc" (
+          set MILL_BUILD_SCRIPT=build.sc
+        ) else (
+            rem no-op
+        )
+    )
+)
+
+if [!MILL_VERSION!]==[] (
+  if exist .mill-version (
+    set /p MILL_VERSION=<.mill-version
+  ) else (
+    if exist .config\mill-version (
+      set /p MILL_VERSION=<.config\mill-version
+    ) else (
+      if not "%MILL_BUILD_SCRIPT%"=="" (
+        for /f "tokens=1-2*" %%a in ('findstr /C:"//| mill-version:" %MILL_BUILD_SCRIPT%') do (
+          set "MILL_VERSION=%%c"
+        )
+      ) else (
+        rem no-op
+      )
+    )
+  )
+)
+
+if [!MILL_VERSION!]==[] set MILL_VERSION=%DEFAULT_MILL_VERSION%
+
+if [!MILL_DOWNLOAD_PATH!]==[] set MILL_DOWNLOAD_PATH=%USERPROFILE%\.mill\download
+
+rem without bat file extension, cmd doesn't seem to be able to run it
+
+set "MILL_NATIVE_SUFFIX=-native"
+set "MILL_JVM_SUFFIX=-jvm"
+set "FULL_MILL_VERSION=%MILL_VERSION%"
+set "MILL_EXT=.bat"
+set "ARTIFACT_SUFFIX="
+REM Check if MILL_VERSION contains MILL_NATIVE_SUFFIX
+echo !MILL_VERSION! | findstr /C:"%MILL_NATIVE_SUFFIX%" >nul
+if !errorlevel! equ 0 (
+    set "MILL_VERSION=%MILL_VERSION:-native=%"
+    REM -native images compiled with graal do not support windows-arm
+    REM https://github.com/oracle/graal/issues/9215
+    IF /I NOT "%PROCESSOR_ARCHITECTURE%"=="ARM64" (
+        set "ARTIFACT_SUFFIX=-native-windows-amd64"
+        set "MILL_EXT=.exe"
+    ) else (
+        rem no-op
+    )
+) else (
+    echo !MILL_VERSION! | findstr /C:"%MILL_JVM_SUFFIX%" >nul
+    if !errorlevel! equ 0 (
+        set "MILL_VERSION=%MILL_VERSION:-jvm=%"
+    ) else (
+        set "SKIP_VERSION=false"
+        set "MILL_PREFIX=%MILL_VERSION:~0,4%"
+        if "!MILL_PREFIX!"=="0.1." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.2." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.3." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.4." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.5." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.6." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.7." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.8." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.9." set "SKIP_VERSION=true"
+        set "MILL_PREFIX=%MILL_VERSION:~0,5%"
+        if "!MILL_PREFIX!"=="0.10." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.11." set "SKIP_VERSION=true"
+        if "!MILL_PREFIX!"=="0.12." set "SKIP_VERSION=true"
+
+        if "!SKIP_VERSION!"=="false" (
+            IF /I NOT "%PROCESSOR_ARCHITECTURE%"=="ARM64" (
+                set "ARTIFACT_SUFFIX=-native-windows-amd64"
+                set "MILL_EXT=.exe"
+            )
+        ) else (
+            rem no-op
+        )
+    )
+)
+
+set MILL=%MILL_DOWNLOAD_PATH%\!FULL_MILL_VERSION!!MILL_EXT!
+
+set MILL_RESOLVE_DOWNLOAD=
+
+if not exist "%MILL%" (
+  set MILL_RESOLVE_DOWNLOAD=true
+) else (
+    if defined MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT (
+        set MILL_RESOLVE_DOWNLOAD=true
+    ) else (
+        rem no-op
+    )
+)
+
+
+if [!MILL_RESOLVE_DOWNLOAD!]==[true] (
+    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,4%
+    set MILL_SHORT_VERSION_PREFIX=%MILL_VERSION:~0,2%
+    rem Since 0.5.0
+    set MILL_DOWNLOAD_SUFFIX=-assembly
+    rem Since 0.11.0
+    set MILL_DOWNLOAD_FROM_MAVEN=1
+    if [!MILL_VERSION_PREFIX!]==[0.0.] (
+        set MILL_DOWNLOAD_SUFFIX=
+        set MILL_DOWNLOAD_FROM_MAVEN=0
+    )
+    if [!MILL_VERSION_PREFIX!]==[0.1.] (
+        set MILL_DOWNLOAD_SUFFIX=
+        set MILL_DOWNLOAD_FROM_MAVEN=0
+    )
+    if [!MILL_VERSION_PREFIX!]==[0.2.] (
+        set MILL_DOWNLOAD_SUFFIX=
+        set MILL_DOWNLOAD_FROM_MAVEN=0
+    )
+    if [!MILL_VERSION_PREFIX!]==[0.3.] (
+        set MILL_DOWNLOAD_SUFFIX=
+        set MILL_DOWNLOAD_FROM_MAVEN=0
+    )
+    if [!MILL_VERSION_PREFIX!]==[0.4.] (
+        set MILL_DOWNLOAD_SUFFIX=
+        set MILL_DOWNLOAD_FROM_MAVEN=0
+    )
+    if [!MILL_VERSION_PREFIX!]==[0.5.] set MILL_DOWNLOAD_FROM_MAVEN=0
+    if [!MILL_VERSION_PREFIX!]==[0.6.] set MILL_DOWNLOAD_FROM_MAVEN=0
+    if [!MILL_VERSION_PREFIX!]==[0.7.] set MILL_DOWNLOAD_FROM_MAVEN=0
+    if [!MILL_VERSION_PREFIX!]==[0.8.] set MILL_DOWNLOAD_FROM_MAVEN=0
+    if [!MILL_VERSION_PREFIX!]==[0.9.] set MILL_DOWNLOAD_FROM_MAVEN=0
+
+    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,5%
+    if [!MILL_VERSION_PREFIX!]==[0.10.] set MILL_DOWNLOAD_FROM_MAVEN=0
+
+    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,8%
+    if [!MILL_VERSION_PREFIX!]==[0.11.0-M] set MILL_DOWNLOAD_FROM_MAVEN=0
+
+    set MILL_VERSION_PREFIX=%MILL_VERSION:~0,5%
+    set DOWNLOAD_EXT=exe
+    if [!MILL_SHORT_VERSION_PREFIX!]==[0.] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION_PREFIX!]==[0.12.] set DOWNLOAD_EXT=exe
+    if [!MILL_VERSION!]==[0.12.0] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.1] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.2] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.3] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.4] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.5] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.6] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.7] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.8] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.9] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.10] set DOWNLOAD_EXT=jar
+    if [!MILL_VERSION!]==[0.12.11] set DOWNLOAD_EXT=jar
+
+    set MILL_VERSION_PREFIX=
+    set MILL_SHORT_VERSION_PREFIX=
+
+    for /F "delims=- tokens=1" %%A in ("!MILL_VERSION!") do set MILL_VERSION_BASE=%%A
+    set MILL_VERSION_MILESTONE=
+    for /F "delims=- tokens=2" %%A in ("!MILL_VERSION!") do set MILL_VERSION_MILESTONE=%%A
+    set MILL_VERSION_MILESTONE_START=!MILL_VERSION_MILESTONE:~0,1!
+    if [!MILL_VERSION_MILESTONE_START!]==[M] (
+        set MILL_VERSION_TAG=!MILL_VERSION_BASE!-!MILL_VERSION_MILESTONE!
+    ) else (
+        set MILL_VERSION_TAG=!MILL_VERSION_BASE!
+    )
+    if [!MILL_DOWNLOAD_FROM_MAVEN!]==[1] (
+        set MILL_DOWNLOAD_URL=https://repo1.maven.org/maven2/com/lihaoyi/mill-dist!ARTIFACT_SUFFIX!/!MILL_VERSION!/mill-dist!ARTIFACT_SUFFIX!-!MILL_VERSION!.!DOWNLOAD_EXT!
+    ) else (
+        set MILL_DOWNLOAD_URL=!MILL_GITHUB_RELEASE_CDN!%MILL_REPO_URL%/releases/download/!MILL_VERSION_TAG!/!MILL_VERSION!!MILL_DOWNLOAD_SUFFIX!
+    )
+
+    if defined MILL_TEST_DRY_RUN_LAUNCHER_SCRIPT (
+        echo !MILL_DOWNLOAD_URL!
+        echo !MILL!
+        exit /b 0
+    )
+
+    rem there seems to be no way to generate a unique temporary file path (on native Windows)
+    set MILL_DOWNLOAD_FILE=%MILL%.tmp
+
+    echo Downloading mill !MILL_VERSION! from !MILL_DOWNLOAD_URL! ... 1>&2
+
+    if not exist "%MILL_DOWNLOAD_PATH%" mkdir "%MILL_DOWNLOAD_PATH%"
+    rem curl is bundled with recent Windows 10
+    rem but I don't think we can expect all the users to have it in 2019
+    where /Q curl
+    if !ERRORLEVEL! EQU 0 (
+        curl -f -L "!MILL_DOWNLOAD_URL!" -o "!MILL_DOWNLOAD_FILE!"
+    ) else (
+        rem bitsadmin seems to be available on Windows 7
+        rem without /dynamic, github returns 403
+        rem bitsadmin is sometimes needlessly slow but it looks better with /priority foreground
+        bitsadmin /transfer millDownloadJob /dynamic /priority foreground "!MILL_DOWNLOAD_URL!" "!MILL_DOWNLOAD_FILE!"
+    )
+    if not exist "!MILL_DOWNLOAD_FILE!" (
+        echo Could not download mill !MILL_VERSION! 1>&2
+        exit /b 1
+    )
+
+    move /y "!MILL_DOWNLOAD_FILE!" "%MILL%"
+
+    set MILL_DOWNLOAD_FILE=
+    set MILL_DOWNLOAD_SUFFIX=
+)
+
+set MILL_DOWNLOAD_PATH=
+set MILL_VERSION=
+set MILL_REPO_URL=
+
+rem Need to preserve the first position of those listed options
+set MILL_FIRST_ARG=
+if [%~1%]==[--bsp] (
+  set MILL_FIRST_ARG=%1%
+) else (
+  if [%~1%]==[-i] (
+    set MILL_FIRST_ARG=%1%
+  ) else (
+    if [%~1%]==[--interactive] (
+      set MILL_FIRST_ARG=%1%
+    ) else (
+      if [%~1%]==[--no-server] (
+        set MILL_FIRST_ARG=%1%
+      ) else (
+        if [%~1%]==[--no-daemon] (
+          set MILL_FIRST_ARG=%1%
+        ) else (
+          if [%~1%]==[--repl] (
+            set MILL_FIRST_ARG=%1%
+          ) else (
+            if [%~1%]==[--help] (
+              set MILL_FIRST_ARG=%1%
+            )
+          )
+        )
+      )
+    )
+  )
+)
+set "MILL_PARAMS=%*%"
+
+if not [!MILL_FIRST_ARG!]==[] (
+  for /f "tokens=1*" %%a in ("%*") do (
+    set "MILL_PARAMS=%%b"
+  )
+)
+
+rem -D mill.main.cli is for compatibility with Mill 0.10.9 - 0.13.0-M2
+"%MILL%" %MILL_FIRST_ARG% -D "mill.main.cli=%MILL_MAIN_CLI%" %MILL_PARAMS%

From ae03dbfcd6e73ba0d5a1187cbd8b0a7472dc69d0 Mon Sep 17 00:00:00 2001
From: Piotr Chabelski <ged.subfan@gmail.com>
Date: Tue, 15 Jul 2025 10:13:13 +0200
Subject: [PATCH 2/3] Bump Mill to 0.12.14-19-ccc31b

---
 .mill-version | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.mill-version b/.mill-version
index d0834a7f54..417220eaa1 100644
--- a/.mill-version
+++ b/.mill-version
@@ -1 +1 @@
-0.12.14
+0.12.14-19-ccc31b

From 5c0a0633e3d70c00dfa354d36eeb7c6202aefdb5 Mon Sep 17 00:00:00 2001
From: Piotr Chabelski <ged.subfan@gmail.com>
Date: Tue, 15 Jul 2025 10:36:25 +0200
Subject: [PATCH 3/3] Automatically add the new Sonatype Central Portal
 snapshots repository when snapshots are expected to be used

---
 modules/build/src/main/scala/scala/build/Bloop.scala  |  4 +++-
 .../scala/scala/build/tests/BuildOptionsTests.scala   |  8 ++++++--
 .../scala/cli/commands/pgp/PgpExternalCommand.scala   |  6 +++++-
 .../main/scala/scala/cli/internal/ScalaJsLinker.scala |  6 +++++-
 .../main/scala/scala/cli/launcher/LauncherCli.scala   |  7 ++++++-
 .../src/main/scala/scala/build/Artifacts.scala        | 11 +++++++++--
 .../main/scala/scala/build/options/BuildOptions.scala |  4 +++-
 project/deps/package.mill.scala                       |  3 ++-
 8 files changed, 39 insertions(+), 10 deletions(-)

diff --git a/modules/build/src/main/scala/scala/build/Bloop.scala b/modules/build/src/main/scala/scala/build/Bloop.scala
index cc5a61c2b2..dbe8aaad65 100644
--- a/modules/build/src/main/scala/scala/build/Bloop.scala
+++ b/modules/build/src/main/scala/scala/build/Bloop.scala
@@ -3,6 +3,7 @@ package scala.build
 import bloop.rifle.{BloopRifleConfig, BuildServer}
 import ch.epfl.scala.bsp4j
 import coursier.cache.FileCache
+import coursier.maven.MavenRepository
 import coursier.util.Task
 import dependency.parser.ModuleParser
 import dependency.{AnyDependency, DependencyLike, ScalaParameters, ScalaVersion}
@@ -81,7 +82,8 @@ object Bloop {
           Seq(Positioned.none(dep)),
           Seq(
             coursier.Repositories.sonatype("snapshots"),
-            coursier.Repositories.sonatypeS01("snapshots")
+            coursier.Repositories.sonatypeS01("snapshots"),
+            MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
           ),
           Some(params),
           logger,
diff --git a/modules/build/src/test/scala/scala/build/tests/BuildOptionsTests.scala b/modules/build/src/test/scala/scala/build/tests/BuildOptionsTests.scala
index 4eda96df8a..4cf036c068 100644
--- a/modules/build/src/test/scala/scala/build/tests/BuildOptionsTests.scala
+++ b/modules/build/src/test/scala/scala/build/tests/BuildOptionsTests.scala
@@ -1,9 +1,10 @@
 package scala.build.tests
 
 import com.eed3si9n.expecty.Expecty.assert as expect
-import coursier.Repositories
+import coursier.{Repositories, Repository}
 import coursier.cache.FileCache
 import coursier.core.Version
+import coursier.maven.MavenRepository
 import dependency.ScalaParameters
 
 import scala.build.Ops.*
@@ -444,10 +445,13 @@ class BuildOptionsTests extends TestUtil.ScalaCliBuildSuite {
           .getOrElse(sys.error("cannot happen"))
         val repositories = build.options.finalRepositories.orThrow
 
-        expect(repositories.length == 3)
+        expect(repositories.length == 4)
         expect(repositories.contains(Repositories.sonatype("snapshots")))
         expect(repositories.contains(Repositories.sonatypeS01("snapshots")))
         expect(repositories.contains(Repositories.central))
+        expect(repositories.contains(
+          MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+        ))
     }
   }
 
diff --git a/modules/cli/src/main/scala/scala/cli/commands/pgp/PgpExternalCommand.scala b/modules/cli/src/main/scala/scala/cli/commands/pgp/PgpExternalCommand.scala
index 3247a7b1d0..c3a134d988 100644
--- a/modules/cli/src/main/scala/scala/cli/commands/pgp/PgpExternalCommand.scala
+++ b/modules/cli/src/main/scala/scala/cli/commands/pgp/PgpExternalCommand.scala
@@ -2,6 +2,7 @@ package scala.cli.commands.pgp
 
 import coursier.Repositories
 import coursier.cache.{ArchiveCache, FileCache}
+import coursier.maven.MavenRepository
 import coursier.util.Task
 import dependency.*
 
@@ -185,7 +186,10 @@ object PgpExternalCommand {
     if (signingCliOptions.forceJvm.getOrElse(false)) {
       val extraRepos =
         if (version.endsWith("SNAPSHOT"))
-          Seq(Repositories.sonatype("snapshots"))
+          Seq(
+            Repositories.sonatype("snapshots"),
+            MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+          )
         else
           Nil
 
diff --git a/modules/cli/src/main/scala/scala/cli/internal/ScalaJsLinker.scala b/modules/cli/src/main/scala/scala/cli/internal/ScalaJsLinker.scala
index f861025566..d9de903e34 100644
--- a/modules/cli/src/main/scala/scala/cli/internal/ScalaJsLinker.scala
+++ b/modules/cli/src/main/scala/scala/cli/internal/ScalaJsLinker.scala
@@ -2,6 +2,7 @@ package scala.cli.internal
 
 import coursier.Repositories
 import coursier.cache.{ArchiveCache, FileCache}
+import coursier.maven.MavenRepository
 import coursier.util.Task
 import dependency.*
 import org.scalajs.testing.adapter.TestAdapterInitializer as TAI
@@ -58,7 +59,10 @@ object ScalaJsLinker {
 
         val extraRepos =
           if (scalaJsVersion.endsWith("SNAPSHOT") || scalaJsCliVersion.endsWith("SNAPSHOT"))
-            Seq(Repositories.sonatype("snapshots"))
+            Seq(
+              Repositories.sonatype("snapshots"),
+              MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+            )
           else
             Nil
 
diff --git a/modules/cli/src/main/scala/scala/cli/launcher/LauncherCli.scala b/modules/cli/src/main/scala/scala/cli/launcher/LauncherCli.scala
index 2d590d2460..39dcad9955 100644
--- a/modules/cli/src/main/scala/scala/cli/launcher/LauncherCli.scala
+++ b/modules/cli/src/main/scala/scala/cli/launcher/LauncherCli.scala
@@ -3,6 +3,7 @@ package scala.cli.launcher
 import coursier.Repositories
 import coursier.cache.FileCache
 import coursier.core.Version
+import coursier.maven.MavenRepository
 import coursier.util.{Artifact, Task}
 import dependency.*
 
@@ -22,7 +23,11 @@ object LauncherCli {
     val cache           = CoursierOptions().coursierCache(logger.coursierLogger(""))
     val scalaVersion    = options.cliScalaVersion.getOrElse(scalaCliScalaVersion(version))
     val scalaParameters = ScalaParameters(scalaVersion)
-    val snapshotsRepo   = Seq(Repositories.central, Repositories.sonatype("snapshots"))
+    val snapshotsRepo   = Seq(
+      Repositories.central,
+      Repositories.sonatype("snapshots"),
+      MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+    )
 
     val cliVersion: String =
       if (version == "nightly") resolveNightlyScalaCliVersion(cache, scalaParameters) else version
diff --git a/modules/options/src/main/scala/scala/build/Artifacts.scala b/modules/options/src/main/scala/scala/build/Artifacts.scala
index 31fd98e9c7..291a028a62 100644
--- a/modules/options/src/main/scala/scala/build/Artifacts.scala
+++ b/modules/options/src/main/scala/scala/build/Artifacts.scala
@@ -3,6 +3,7 @@ package scala.build
 import coursier.cache.FileCache
 import coursier.core.{Classifier, Module, ModuleName, Organization, Repository, Version}
 import coursier.error.ResolutionError
+import coursier.maven.MavenRepository
 import coursier.util.Task
 import coursier.{Dependency as CsDependency, Fetch, Resolution, core as csCore, util as csUtil}
 import dependency.*
@@ -164,7 +165,10 @@ object Artifacts {
       val hasSnapshots = jvmTestRunnerDependencies.exists(_.version.endsWith("SNAPSHOT")) ||
         scalaArtifactsParamsOpt.flatMap(_.scalaNativeCliVersion).exists(_.endsWith("SNAPSHOT"))
       if (hasSnapshots)
-        Seq(coursier.Repositories.sonatype("snapshots"))
+        Seq(
+          coursier.Repositories.sonatype("snapshots"),
+          MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+        )
       else
         Nil
     }
@@ -427,7 +431,10 @@ object Artifacts {
           if addJvmRunner0 then {
             val maybeSnapshotRepo =
               if runnerVersion.endsWith("SNAPSHOT") then
-                Seq(coursier.Repositories.sonatype("snapshots"))
+                Seq(
+                  coursier.Repositories.sonatype("snapshots"),
+                  MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
+                )
               else Nil
             val runnerVersion0 =
               if shouldUseLegacyRunners then {
diff --git a/modules/options/src/main/scala/scala/build/options/BuildOptions.scala b/modules/options/src/main/scala/scala/build/options/BuildOptions.scala
index ce5e98a0d6..0eaa8618cb 100644
--- a/modules/options/src/main/scala/scala/build/options/BuildOptions.scala
+++ b/modules/options/src/main/scala/scala/build/options/BuildOptions.scala
@@ -1,6 +1,7 @@
 package scala.build.options
 import coursier.cache.{ArchiveCache, FileCache}
 import coursier.core.{Repository, Version}
+import coursier.maven.MavenRepository
 import coursier.parse.RepositoryParser
 import coursier.util.{Artifact, Task}
 import dependency.*
@@ -261,7 +262,8 @@ final case class BuildOptions(
       then
         Seq(
           coursier.Repositories.sonatype("snapshots"),
-          coursier.Repositories.sonatypeS01("snapshots")
+          coursier.Repositories.sonatypeS01("snapshots"),
+          MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
         )
       else Nil
     val extraRepositories = classPathOptions.extraRepositories.filterNot(_ == "snapshots")
diff --git a/project/deps/package.mill.scala b/project/deps/package.mill.scala
index 16e4702e7a..6be9e561b2 100644
--- a/project/deps/package.mill.scala
+++ b/project/deps/package.mill.scala
@@ -300,7 +300,8 @@ object Docker {
 def customRepositories =
   Seq(
     coursier.Repositories.sonatype("snapshots"),
-    coursier.MavenRepository("https://s01.oss.sonatype.org/content/repositories/snapshots")
+    coursier.MavenRepository("https://s01.oss.sonatype.org/content/repositories/snapshots"),
+    coursier.MavenRepository("https://central.sonatype.com/repository/maven-snapshots")
     // Uncomment for local development
     // coursier.LocalRepositories.Dangerous.maven2Local
   )