MNG-5889 - adding logic that looks for the file argument and starts the

search for the .mvn directory at the location of the specified POM when
present

apache-maven/src/bin/mvn

@@ -121,7 +121,7 @@ fi
 # first directory with .mvn subdirectory is considered project base directory
 find_maven_basedir() {
 (
-  basedir="`pwd`"
+  basedir=`find_file_argument_basedir "$@"`
   wdir="`pwd`"
   while [ "$wdir" != '/' ] ; do
     if [ -d "$wdir"/.mvn ] ; then
@@ -134,14 +134,41 @@ find_maven_basedir() {
 )
 }
 
+find_file_argument_basedir() {
+(
+  basedir="`pwd`"
+
+  found_file_switch=0
+  for arg in "$@"; do
+    if [ ${found_file_switch} -eq 1 ]; then
+      if [ -f ${arg} ]; then
+        basedir=$(dirname $(readlink -f "${arg}"))
+        if [ ! -d ${basedir} ]; then
+          echo "Directory ${basedir} extracted from the -f/--file command-line argument ${arg} does not exist" >&2
+          exit 1
+        fi
+      else
+        echo "POM file ${arg} specified with the -f/--file command line argument does not exist" >&2
+        exit 1
+      fi
+      break
+    fi
+    if [ "$arg" = "-f" -o "$arg" = "--file" ]; then
+      found_file_switch=1
+    fi
+  done
+  echo "${basedir}"
+)
+}
+
 # concatenates all lines of a file
 concat_lines() {
   if [ -f "$1" ]; then
     echo "`tr -s '\n' ' ' < "$1"`"
   fi
 }
 
-MAVEN_PROJECTBASEDIR="${MAVEN_BASEDIR:-`find_maven_basedir`}"
+MAVEN_PROJECTBASEDIR="${MAVEN_BASEDIR:-`find_maven_basedir "$@"`}"
 MAVEN_OPTS="`concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config"` $MAVEN_OPTS"
 
 # For Cygwin, switch project base directory path to Windows format before

apache-maven/src/bin/mvn.cmd

@@ -86,19 +86,69 @@ set MAVEN_CMD_LINE_ARGS=%*
 set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
 if not "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
 
-set "EXEC_DIR=%CD%"
-set "WDIR=%EXEC_DIR%"
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+
+@REM Look for the --file switch and start the search for the .mvn directory from the specified
+@REM POM location, if supplied.
+
+set FILE_ARG=
+:arg_loop
+if "%1" == "-f" (
+  set "FILE_ARG=%2"
+  shift
+  goto process_file_arg
+)
+if "%1" == "--file" (
+  set "FILE_ARG=%2"
+  shift
+  goto process_file_arg
+)
+@REM If none of the above, skip the argument
+shift
+if not "%~1" == "" (
+  goto arg_loop
+) else (
+  goto findBaseDir
+)
+
+:process_file_arg
+if "%FILE_ARG%" == "" (
+  goto findBaseDir
+)
+if not exist "%FILE_ARG%" (
+  echo POM file %FILE_ARG% specified the -f/--file command-line argument does not exist >&2
+  goto error
+)
+call :get_directory_from_file %FILE_ARG%
+if not exist "%POM_DIR%" (
+  echo Directory %POM_DIR% extracted from the -f/--file command-line argument %FILE_ARG% does not exist >&2
+  goto error
+)
+set WDIR=%POM_DIR%
+goto findBaseDir
+
+:get_directory_from_file
+set "POM_DIR=%~dp1"
+:stripPomDir
+if not "_%POM_DIR:~-1%"=="_\" goto pomDirStripped
+set "POM_DIR=%POM_DIR:~0,-1%"
+goto stripPomDir
+:pomDirStripped
+exit /b
 
 :findBaseDir
+cd /d %WDIR%
+:findBaseDirLoop
 if exist "%WDIR%\.mvn" goto baseDirFound
 cd ..
 if "%WDIR%"=="%CD%" goto baseDirNotFound
 set "WDIR=%CD%"
-goto findBaseDir
+goto findBaseDirLoop
 
 :baseDirFound
 set "MAVEN_PROJECTBASEDIR=%WDIR%"
-cd "%EXEC_DIR%"
+cd /d "%EXEC_DIR%"
 goto endDetectBaseDir
 
 :baseDirNotFound