From b7a0c9fa308bdd22f84702821b5c46c4ea4454b4 Mon Sep 17 00:00:00 2001
From: Raphael Dannecker <raphael.dannecker@steinbeisschule-reutlingen.de>
Date: Tue, 18 Jul 2023 13:19:45 +0200
Subject: [PATCH] download necessary qcow2-files automatically

---
 roles/lmn_vm/files/run-vm.sh  | 30 ++++++++++++++++++++++++++++--
 roles/lmn_vm/files/sync-vm.sh | 27 ++++++++++++++++++++++++++-
 2 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/roles/lmn_vm/files/run-vm.sh b/roles/lmn_vm/files/run-vm.sh
index c726a4f..3e48545 100755
--- a/roles/lmn_vm/files/run-vm.sh
+++ b/roles/lmn_vm/files/run-vm.sh
@@ -48,14 +48,40 @@ if [[  $# -ne 1 ]] ; then
     exit 1
 fi
 
+# sync vm-torrents and machine definition file
+sudo /usr/local/bin/sync-vm.sh -t
+
 VM_NAME=$1
 VM_DIR="/tmp/${UID}/vmimages"
 
+
 if [[ ! -f "/var/lib/libvirt/images/${VM_NAME}.qcow2" && ! -f "${VM_DIR}/${VM_NAME}.qcow2" ]]; then
-    echo "no base VM disk '${VM_NAME}.qcow2' found" >&2
-    exit 1
+    if [[ ! -f "/var/lib/libvirt/images/${VM_NAME}.qcow2.torrent" ]]; then
+        echo "no base VM disk '${VM_NAME}.qcow2' found and/or ${VM_NAME} not found on server" >&2
+        exit 1
+    fi
+    # sync vm-disk image by torrent 
+    sudo /usr/local/bin/sync-vm.sh "${VM_NAME}"
+    echo "sudo /usr/local/bin/sync-vm.sh ${VM_NAME}"
 fi
 
+echo "qcow2 seems to be available"
+
+imgfile="/var/lib/libvirt/images/${VM_NAME}.qcow2" && [[ -f "${VM_DIR}/${VM_NAME}.qcow2" ]] && imgfile="${VM_DIR}/${VM_NAME}.qcow2"
+#backingfile=$(qemu-img info -U "${imgfile}" | grep ^image: | cut -d' ' -f2)
+
+backingfile=$(qemu-img info -U "${imgfile}" | grep "^backing file:" | cut -d ' ' -f 3) 
+while [[ ! -z "${backingfile}" ]]; do 
+    echo $backingfile
+    if [[ ! -f "/var/lib/libvirt/images/${backingfile}" && ! -f "${VM_DIR}/${backingfile}" ]]; then
+        # sync vm-disk image by torrent 
+	sudo /usr/local/bin/sync-vm.sh "${backingfile//.qcow2/}"
+	echo "sudo /usr/local/bin/sync-vm.sh ${backingfile//.qcow2/}"
+    fi
+    imgfile="/var/lib/libvirt/images/${backingfile}" && [[ -f "${VM_DIR}/${backingfile}" ]] && imgfile="${VM_DIR}/${backingfile}"
+    backingfile=$(qemu-img info -U "${imgfile}" | grep "^backing file:" | cut -d ' ' -f 3) 
+done
+
 # check, if we have to start squid
 if ! killall -s 0 squid; then
     echo "starting squid."
diff --git a/roles/lmn_vm/files/sync-vm.sh b/roles/lmn_vm/files/sync-vm.sh
index 61d1d26..0a551b9 100755
--- a/roles/lmn_vm/files/sync-vm.sh
+++ b/roles/lmn_vm/files/sync-vm.sh
@@ -48,6 +48,30 @@ sync_all_torrents() {
 	  /var/lib/libvirt/images/
     rsync -av --password-file=/etc/rsync.secret rsync://vmuser@server:/vmimages-download/xml \
 	  /var/lib/libvirt/images/
+    rsync -av --password-file=/etc/rsync.secret rsync://vmuser@server:/vmimages-download/desktop/*.desktop \
+	  /usr/share/applications/
+    update-desktop-database /usr/share/applications
+}
+
+create_starter() {
+    if [[ ! -f "/usr/share/applications/VM_${VM_NAME}_starter.desktop" ]]; then 
+        cat << EOF >"/usr/share/applications/VM_${VM_NAME}_starter.desktop"
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=VMstart: ${VM_NAME}
+GenericName=VM starter ${VM_NAME}
+Comment=Start VM ${VM_NAME}
+#TryExec=konsole
+Exec=/usr/local/bin/run-vm.sh ${VM_NAME}
+Icon=clementine
+Categories=VM;Engineering;
+MimeType=image/vnd.dxf;
+Keywords=design;VM;diagrams;graphics
+Terminal=true
+EOF
+        update-desktop-database /usr/share/applications
+    fi
 }
 
 while getopts ':dat' OPTION; do
@@ -57,10 +81,11 @@ while getopts ':dat' OPTION; do
             ;;
         a)
             sync_all_images
-            exit 1
+            exit 0
             ;;
         t)
             sync_all_torrents
+            exit 0
             ;;
         ?)
             show_help