add script for creating VM image

bin/make-winux

@@ -0,0 +1,122 @@
+#!/usr/bin/env zsh
+
+export LINUX_DISK_IMG=/home/artur/winux/VM/linux/linux.img
+export WINUX_DISK_IMG=./winux.img
+
+# Mount the image of oryginal 
+#
+
+# Mounting the image
+function wxumount {
+  echo "unmounting :$1"
+    mkdir -p $1
+    if mountpoint -q $1; then
+        echo "Unmounting $1..."
+        umount /mnt/winux
+        if [ $? -eq 0 ]; then
+            echo "Successfully unmounted $1."
+        else
+            echo "Failed to unmount $1."
+        fi
+    else
+        echo "$1 is not mounted."
+    fi
+}
+
+wxumount /mnt/winux
+wxumount /mnt/linux
+
+# (re)create an empty sparsed file
+rm -rf $WINUX_DISK_IMG
+dd if=/dev/zero of=$WINUX_DISK_IMG bs=1 count=0 seek=20G
+
+# Check size
+# real size: du -h winux.img
+# appeared as: ls -lh winux.img
+
+
+# Copy boot 
+
+IMG="/home/artur/winux/VM/linux/linux.img"
+
+SECTOR_SIZE=$(LC_ALL=C sfdisk -d "$LINUX_DISK_IMG" | awk 'match($0,/sector-size:\s*([0-9]+)/,m){print m[1]; exit}')
+START=$(LC_ALL=C sfdisk -d "$LINUX_DISK_IMG" | awk 'match($0,/start=\s*([0-9]+)/,m){print m[1]; exit}')
+
+echo "Sector size: $SECTOR_SIZE"
+echo "Start sector: $START"
+
+
+dd if="$LINUX_DISK_IMG" of="$WINUX_DISK_IMG" bs="$SECTOR_SIZE" count="$START" conv=notrunc
+
+# Formatting the disk
+# No altering the first 1MB
+echo '2048,,83,*' | sudo sfdisk --no-reread $WINUX_DISK_IMG
+
+# List all loops: sudo losetup -a
+WINUX_LOOP_DEV=$(sudo losetup --find --show $WINUX_DISK_IMG)
+# Scan also for partitions: sudo losetup --find --show --partscan winux.img
+
+echo "Loop device: $WINUX_LOOP_DEV"
+
+
+
+export WINUX_LOOP_DEV="$(losetup --find --show -P $WINUX_LOOP_DEV)"
+
+mkfs.ext2 ${WINUX_LOOP_DEV}p1
+
+mount ${WINUX_LOOP_DEV}p1 /mnt/winux
+
+## The image is formatted and ready to copy files over
+
+
+export LINUX_LOOP_DEV="$(losetup --find --show --partscan $LINUX_DISK_IMG)"
+mount ${LINUX_LOOP_DEV}p1 /mnt/linux
+
+
+# copying files 
+
+cd /mnt/linux
+tar --numeric-owner --xattrs --acls -cpf - \
+  --exclude='lost+found' \
+  --exclude='var/log/*' \
+  --exclude='var/tmp/*' \
+  --exclude='tmp/*' \
+  --exclude='var/cache/*' \
+  --exclude='swapfile' \
+  --exclude='dev/*' \
+  --exclude='proc/*' \
+  --exclude='sys/*' \
+  --exclude='run/*' \
+  . | tar --numeric-owner --xattrs --acls -xpf - -C /mnt/winux
+
+
+
+#### TESTTING CODE
+losetup -j $WINUX_DISK_IMG
+
+# Clean up after building 
+
+wxumount /mnt/winux
+wxumount /mnt/linux
+
+for dev in $(losetup -j $WINUX_DISK_IMG | cut -d: -f1); do
+  losetup -d "$dev"
+done
+
+for dev in $(losetup -j $LINUX_DISK_IMG | cut -d: -f1); do
+  losetup -d "$dev"
+done
+
+
+# Create an archive
+#
+
+echo "making the archive"
+zstd -T0 --ultra -22 winux.img -o winux.img.zst
+
+# decompression with 
+# unzstd --sparse winux.img.zst
+# or
+# zstd -d --sparse winux.img.zst -o winux.img
+
+