[2.x] fix: handle -sbt-dir with spaces from .sbtopts (#8875)

**Problem**

When you pass -sbt-dir "/Users/a' dog" on the command line, the launcher correctly produces:

-Dsbt.global.base=/Users/a' dog

But when you put the same option into .sbtopts, the launcher previously split the line on spaces without respecting quotes, so the resulting -Dsbt.global.base was truncated (for example, -Dsbt.global.base=/Users/a'). This made .sbtopts behavior inconsistent with CLI behavior and broke setups where the global sbt directory path contains spaces and an embedded quote.

launcher-package/integration-test/src/test/scala/RunnerScriptTest.scala

@@ -252,6 +252,31 @@ abstract class RunnerScriptTest extends verify.BasicTestSuite with ShellScriptUt
         s"sbtopts options should appear before CLI memory settings. g1Index=$g1Index, xmxCliIndex=$xmxCliIndex"
       )
 
+  // Test for issue #7197: -sbt-dir with spaces (and quotes) in .sbtopts
+  // windowsSupport = false: skip on Windows cmd, but runs on Git Bash (#8779)
+  testOutput(
+    "sbt -sbt-dir with space and quote in .sbtopts",
+    sbtOptsFileContents = """-sbt-dir "/Users/a' dog"""",
+    windowsSupport = false,
+  )("-d", "-v"): (out: List[String]) =>
+    val cmdLineStart = out.indexWhere(_.contains("Executing command line"))
+    assert(cmdLineStart >= 0, "Command line section not found")
+
+    val cmdLine = out.drop(cmdLineStart + 1).takeWhile(!_.trim.isEmpty)
+    val globalBaseArgs =
+      cmdLine.filter(_.contains("Dsbt.global.base"))
+
+    assert(
+      globalBaseArgs.nonEmpty,
+      s"-Dsbt.global.base should be present in command line. cmdLine=${cmdLine.mkString(", ")}"
+    )
+    assert(
+      globalBaseArgs.exists(arg =>
+        arg.contains("= /Users/a' dog") || arg.contains("=/Users/a' dog")
+      ),
+      s"-Dsbt.global.base should contain full path with space and quote. args=${globalBaseArgs.mkString(", ")}"
+    )
+
   // Test for issue #7333: JVM parameters with spaces in .sbtopts
   testOutput(
     "sbt with -J--add-modules ALL-DEFAULT in .sbtopts (args with spaces)",

sbt

@@ -738,6 +738,47 @@ map_args () {
   declare -p commands
 }
 
+# Parse a line into words, respecting single and double quotes.
+# This is used for .sbtopts so that options like:
+#   -sbt-dir "/Users/a' dog"
+# are split into two arguments: -sbt-dir and /Users/a' dog
+parseLineIntoWords() {
+  local line="$1"
+  local word=""
+  local i=0
+  local len=${#line}
+  local in_dq=0
+  local in_sq=0
+  while (( i < len )); do
+    local c="${line:$i:1}"
+    if (( in_dq )); then
+      if [[ "$c" == '"' ]]; then
+        in_dq=0
+      else
+        word+="$c"
+      fi
+    elif (( in_sq )); then
+      if [[ "$c" == "'" ]]; then
+        in_sq=0
+      else
+        word+="$c"
+      fi
+    else
+      case "$c" in
+        '"')  in_dq=1 ;;
+        "'")  in_sq=1 ;;
+        ' '|$'\t')
+          [[ -n "$word" ]] && printf '%s\n' "$word"
+          word=""
+          ;;
+        *)    word+="$c" ;;
+      esac
+    fi
+    ((i++))
+  done
+  [[ -n "$word" ]] && printf '%s\n' "$word"
+}
+
 process_args () {
   while [[ $# -gt 0 ]]; do
     case "$1" in
@@ -794,6 +835,21 @@ loadConfigFile() {
   done
 }
 
+# Append tokens from an sbtopts-style file into the global sbt_file_opts array.
+# Each non-empty, non-comment line is split using parseLineIntoWords so that
+# quoted values with spaces (and embedded quotes) are preserved as single arguments.
+appendSbtoptsFromFile() {
+  local file="$1"
+  [[ ! -f "$file" ]] && return
+  while IFS= read -r line || [[ -n "$line" ]]; do
+    line=$(printf '%s' "$line" | sed $'/^\#/d;s/[[:space:]]\{1,\}#.*//;s/\r$//')
+    [[ -z "$line" ]] && continue
+    while IFS= read -r token; do
+      [[ -n "$token" ]] && sbt_file_opts+=("$token")
+    done < <(parseLineIntoWords "$line")
+  done < "$file"
+}
+
 loadPropFile() {
   # trim key and value so as to be more forgiving with spaces around the '=':
   k=$(trimString $k)
@@ -893,14 +949,14 @@ fi
 
 # Pull in the machine-wide settings configuration.
 if [[ -f "$machine_sbt_opts_file" ]]; then
-  sbt_file_opts+=($(loadConfigFile "$machine_sbt_opts_file"))
+  appendSbtoptsFromFile "$machine_sbt_opts_file"
 else
   # Otherwise pull in the default settings configuration.
-  [[ -f "$dist_sbt_opts_file" ]] && sbt_file_opts+=($(loadConfigFile "$dist_sbt_opts_file"))
+  [[ -f "$dist_sbt_opts_file" ]] && appendSbtoptsFromFile "$dist_sbt_opts_file"
 fi
 
 # Pull in the project-level config file, if it exists (highest priority, overrides machine/dist).
-[[ -f "$sbt_opts_file" ]] && sbt_file_opts+=($(loadConfigFile "$sbt_opts_file"))
+[[ -f "$sbt_opts_file" ]] && appendSbtoptsFromFile "$sbt_opts_file"
 
 # Prepend sbtopts so command line args appear last and win for duplicate properties.
 if (( ${#sbt_file_opts[@]} > 0 )); then