fix: disk image build, piCore64 URL, license

- Add kpartx for reliable loop partition mapping in Docker containers
- Fix piCore64 download URL (changed from .img.gz to .zip format)
- Fix piCore64 boot partition mount (initramfs on p1, not p2)
- Fix tar --wildcards for RPi firmware extraction
- Add MIT license (same as KubeSolo)
- Add kpartx and unzip to Docker builder image

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

build/Dockerfile.builder

@@ -36,6 +36,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     gcc-aarch64-linux-gnu \
     binutils-aarch64-linux-gnu \
     git \
+    kpartx \
+    unzip \
     wget \
     xorriso \
     xz-utils \

build/config/versions.env

@@ -25,9 +25,9 @@ NET_BRIDGING_TCZ_SHA256=""
 IPTABLES_TCZ_SHA256=""
 
 # piCore64 (ARM64 — Raspberry Pi)
-PICORE_VERSION=15.0
+PICORE_VERSION=15.0.0
 PICORE_ARCH=aarch64
-PICORE_IMAGE=piCore-${PICORE_VERSION}.img.gz
+PICORE_IMAGE=piCore64-${PICORE_VERSION}.zip
 PICORE_IMAGE_URL=http://www.tinycorelinux.net/${PICORE_VERSION%%.*}.x/${PICORE_ARCH}/releases/RPi/${PICORE_IMAGE}
 
 # Raspberry Pi firmware (boot blobs, DTBs)

build/scripts/create-disk-image.sh

@@ -51,10 +51,39 @@ size=1048576, type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, name="SystemB"
 type=0FC63DAF-8483-4772-8E79-3D69D8477DE4, name="Data"
 EOF
 
-# Set up loop device
-LOOP=$(losetup --show -fP "$IMG_OUTPUT")
+# Set up loop device with partition mappings
+LOOP=$(losetup --show -f "$IMG_OUTPUT")
 echo "==> Loop device: $LOOP"
 
+# Use kpartx for reliable partition device nodes (works in Docker/containers)
+USE_KPARTX=false
+if [ ! -b "${LOOP}p1" ]; then
+    if command -v kpartx >/dev/null 2>&1; then
+        kpartx -a "$LOOP"
+        USE_KPARTX=true
+        sleep 1
+        LOOP_NAME=$(basename "$LOOP")
+        P1="/dev/mapper/${LOOP_NAME}p1"
+        P2="/dev/mapper/${LOOP_NAME}p2"
+        P3="/dev/mapper/${LOOP_NAME}p3"
+        P4="/dev/mapper/${LOOP_NAME}p4"
+    else
+        # Retry with -P flag
+        losetup -d "$LOOP"
+        LOOP=$(losetup --show -fP "$IMG_OUTPUT")
+        sleep 1
+        P1="${LOOP}p1"
+        P2="${LOOP}p2"
+        P3="${LOOP}p3"
+        P4="${LOOP}p4"
+    fi
+else
+    P1="${LOOP}p1"
+    P2="${LOOP}p2"
+    P3="${LOOP}p3"
+    P4="${LOOP}p4"
+fi
+
 MNT_EFI=$(mktemp -d)
 MNT_SYSA=$(mktemp -d)
 MNT_SYSB=$(mktemp -d)
@@ -65,22 +94,25 @@ cleanup() {
     umount "$MNT_SYSA" 2>/dev/null || true
     umount "$MNT_SYSB" 2>/dev/null || true
     umount "$MNT_DATA" 2>/dev/null || true
+    if [ "$USE_KPARTX" = true ]; then
+        kpartx -d "$LOOP" 2>/dev/null || true
+    fi
     losetup -d "$LOOP" 2>/dev/null || true
     rm -rf "$MNT_EFI" "$MNT_SYSA" "$MNT_SYSB" "$MNT_DATA" 2>/dev/null || true
 }
 trap cleanup EXIT
 
 # Format partitions
-mkfs.vfat -F 32 -n KSOLOEFI "${LOOP}p1"
-mkfs.ext4 -q -L KSOLOA "${LOOP}p2"
-mkfs.ext4 -q -L KSOLOB "${LOOP}p3"
-mkfs.ext4 -q -L KSOLODATA "${LOOP}p4"
+mkfs.vfat -F 32 -n KSOLOEFI "$P1"
+mkfs.ext4 -q -L KSOLOA "$P2"
+mkfs.ext4 -q -L KSOLOB "$P3"
+mkfs.ext4 -q -L KSOLODATA "$P4"
 
 # Mount all partitions
-mount "${LOOP}p1" "$MNT_EFI"
-mount "${LOOP}p2" "$MNT_SYSA"
-mount "${LOOP}p3" "$MNT_SYSB"
-mount "${LOOP}p4" "$MNT_DATA"
+mount "$P1" "$MNT_EFI"
+mount "$P2" "$MNT_SYSA"
+mount "$P3" "$MNT_SYSB"
+mount "$P4" "$MNT_DATA"
 
 # --- EFI/Boot Partition ---
 echo "    Installing GRUB..."

build/scripts/extract-core.sh

@@ -29,23 +29,40 @@ if [ "$EXTRACT_ARCH" = "arm64" ]; then
 
     echo "==> Extracting piCore64 image: $PICORE_IMG"
 
-    # Decompress .img.gz to raw image
+    # Decompress to raw image (.img.gz or .zip)
     PICORE_RAW="$CACHE_DIR/piCore-${PICORE_VERSION}.img"
     if [ ! -f "$PICORE_RAW" ]; then
         echo "    Decompressing..."
-        gunzip -k "$PICORE_IMG" 2>/dev/null || \
-            zcat "$PICORE_IMG" > "$PICORE_RAW"
+        case "$PICORE_IMG" in
+            *.zip)
+                unzip -o -j "$PICORE_IMG" '*.img' -d "$CACHE_DIR" 2>/dev/null || \
+                    unzip -o "$PICORE_IMG" -d "$CACHE_DIR"
+                # Find the extracted .img file
+                EXTRACTED_IMG=$(find "$CACHE_DIR" -maxdepth 1 -name '*.img' -newer "$PICORE_IMG" | head -1)
+                if [ -n "$EXTRACTED_IMG" ] && [ "$EXTRACTED_IMG" != "$PICORE_RAW" ]; then
+                    mv "$EXTRACTED_IMG" "$PICORE_RAW"
+                fi
+                ;;
+            *.img.gz)
+                gunzip -k "$PICORE_IMG" 2>/dev/null || \
+                    zcat "$PICORE_IMG" > "$PICORE_RAW"
+                ;;
+            *)
+                echo "ERROR: Unknown piCore image format: $PICORE_IMG"
+                exit 1
+                ;;
+        esac
     fi
 
-    # Mount the piCore rootfs partition (partition 2 in the SD image)
-    # Use losetup to find the partition offset
+    # Mount the piCore boot partition (partition 1) to find kernel/initramfs
+    # piCore layout: p1=boot (FAT32, has kernel+initramfs), p2=rootfs (ext4, has tce/)
     IMG_MNT=$(mktemp -d)
-    echo "    Mounting piCore rootfs partition..."
+    echo "    Mounting piCore boot partition..."
 
-    # Get partition 2 offset (piCore layout: boot=p1, rootfs=p2)
-    OFFSET=$(fdisk -l "$PICORE_RAW" 2>/dev/null | awk '/^.*img2/{print $2}')
+    # Get partition 1 offset (boot/FAT partition with kernel+initramfs)
+    OFFSET=$(fdisk -l "$PICORE_RAW" 2>/dev/null | awk '/^.*img1/{print $2}')
     if [ -z "$OFFSET" ]; then
-        # Fallback: try sfdisk
+        # Fallback: try sfdisk (first partition)
         OFFSET=$(sfdisk -d "$PICORE_RAW" 2>/dev/null | awk -F'[=,]' '/start=/{print $2; exit}' | tr -d ' ')
     fi
     if [ -z "$OFFSET" ]; then
@@ -56,13 +73,13 @@ if [ "$EXTRACT_ARCH" = "arm64" ]; then
 
     BYTE_OFFSET=$((OFFSET * 512))
     mount -o loop,ro,offset="$BYTE_OFFSET" "$PICORE_RAW" "$IMG_MNT" || {
-        echo "ERROR: Failed to mount piCore rootfs (need root for losetup)"
+        echo "ERROR: Failed to mount piCore boot partition (need root for losetup)"
         exit 1
     }
 
-    # Find initramfs in the piCore rootfs
+    # Find initramfs in the piCore boot partition
     COREGZ=""
-    for f in "$IMG_MNT"/boot/corepure64.gz "$IMG_MNT"/boot/core.gz "$IMG_MNT"/*.gz; do
+    for f in "$IMG_MNT"/rootfs-piCore64*.gz "$IMG_MNT"/boot/corepure64.gz "$IMG_MNT"/boot/core.gz "$IMG_MNT"/corepure64.gz "$IMG_MNT"/core.gz; do
         [ -f "$f" ] && COREGZ="$f" && break
     done
 

build/scripts/fetch-rpi-firmware.sh

@@ -44,7 +44,7 @@ trap 'rm -rf "$TEMP_DIR"' EXIT
 
 # Extract only the boot/ directory from the archive
 # Archive structure: firmware-<tag>/boot/...
-tar -xzf "$RPI_FW_ARCHIVE" -C "$TEMP_DIR" --strip-components=1 '*/boot/'
+tar -xzf "$RPI_FW_ARCHIVE" -C "$TEMP_DIR" --strip-components=1 --wildcards '*/boot/'
 
 BOOT_SRC="$TEMP_DIR/boot"
 if [ ! -d "$BOOT_SRC" ]; then