devonfw#826: List and set versions

scripts/src/main/resources/scripts/functions

@@ -1551,6 +1551,39 @@ function doRequireWsl() {
   doFail "${error}\nTo fix this follow these instructions:\nhttps://docs.microsoft.com/en-us/windows/wsl/install-win10"
 }
 
+# $1: software
+# $2: selected version
+function doSetSoftwareVersion() {
+  local software="${1}"
+  local version="${2}"
+  if [ ! -z "${version}" ]
+  then
+    if [ "${version}" = "latest" ]
+    then
+      version="$(head -n 1 ${DEVON_IDE_HOME}/mirrors/${software}/available-versions)"
+    fi
+    grep -v "${software^^}_VERSION" ${DEVON_IDE_HOME}/settings/devon.properties > ${DEVON_IDE_HOME}/settings/devon.properties.tmp
+    mv ${DEVON_IDE_HOME}/settings/devon.properties.tmp ${DEVON_IDE_HOME}/settings/devon.properties
+    echo "${software^^}_VERSION=\"${version}\"" >> ${DEVON_IDE_HOME}/settings/devon.properties
+  else
+    doError "You have to specify the version you want to set."
+  fi
+}
+
+# $1: software
+function doListSoftwareVersions() {
+  local versions_path="${DEVON_IDE_HOME}/mirrors/${1}/available-versions"
+  if [ "$(wc -l ${versions_path} | awk '{print $1}')" -lt 20 ]
+  then
+    pr -4 -t -s "${versions_path}"
+  else
+    head -n 20 "${versions_path}" | pr -4 -t -s
+    doEcho "Only the 20 latest versions are displayed."
+    doAskToContinue "Do you want to see all versions?"
+    less "${versions_path}"
+  fi
+}
+
 # $1: single CLI arg
 # returns 0 if a standard option was detected and handled, 255 otherwise (regular argument to be handeled by CLI parser)
 function doParseOption() {
@@ -1578,6 +1611,16 @@ function doParseOption() {
   then
     quiet="${1}"
     return
+  elif [ "${1}" = "version" ]
+  then
+    if [ "${2}" = "list" ]
+    then
+      doListSoftwareVersions "$(basename ${0})"
+    elif [ "${2}" = "set" ]
+    then
+      doSetSoftwareVersion "$(basename ${0})" "${3}"
+    fi
+    exit
   fi
   return 255
 }
@@ -1587,7 +1630,7 @@ batch=""
 force=""
 quiet=""
 debug=""
-while [ -n "${1}" ] && doParseOption "${1}"
+while [ -n "${1}" ] && doParseOption "${@}"
 do
   shift
 done