commit

Dockerfile

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+FROM alpine:latest
+
+ARG VERSION
+ENV DEBIAN_FRONTEND=noninteractive
+WORKDIR /builder
+
+RUN apt-get update && apt-get install -y \
+    debootstrap wget curl bash ftp-upload dirmngr locales sudo git \
+    && apt-get clean
+
+# Setup locale
+RUN echo "en_US.UTF-8 UTF-8" > /etc/locale.gen && \
+    locale-gen && \
+    update-locale LANG=en_US.UTF-8
+
+COPY base-image-script/ base-image-script/
+
+RUN chmod +x base-image-script/*.sh
+
+# Default command overridden by workflow
+CMD ["bash"]

base-image-script/alpine-image_pt1.sh

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+#!/bin/bash
+# Copyright (c) 2025 fithwum
+# All rights reserved
+set -e
+
+# Alpine version
+ALPINE_VERSION="v3.20"
+ROOTFS_DIR="alpine-rootfs"
+OUTPUT_TAR="alpine-base.tar.gz"
+PACKAGES="bash curl ca-certificates nano"
+
+echo "[INFO] Downloading alpine-make-rootfs if needed..."
+if [ ! -f ./alpine-make-rootfs ]; then
+    wget https://raw.githubusercontent.com/alpinelinux/alpine-make-rootfs/master/alpine-make-rootfs
+    chmod +x alpine-make-rootfs
+fi
+
+echo "[INFO] Creating Alpine rootfs with selected packages..."
+sudo ./alpine-make-rootfs \
+    --branch "$ALPINE_VERSION" \
+    --mirror http://dl-cdn.alpinelinux.org/alpine \
+    --packages "$PACKAGES" \
+    "$ROOTFS_DIR"
+
+echo "[INFO] Binding system directories for chroot..."
+sudo mount --bind /dev "$ROOTFS_DIR/dev"
+sudo mount --bind /proc "$ROOTFS_DIR/proc"
+sudo mount --bind /sys "$ROOTFS_DIR/sys"
+
+echo "[INFO] Copying part 2 script into chroot..."
+sudo cp alpine-base_pt2.sh "$ROOTFS_DIR/alpine-base_pt2.sh"
+sudo chmod +x "$ROOTFS_DIR/alpine-base_pt2.sh"
+
+echo "[INFO] Entering chroot. Run 'exit' when done."
+sudo chroot "$ROOTFS_DIR" /alpine-base_pt2.sh
+
+echo "[INFO] Continuing with packaging after chroot..."
+bash alpine-base_pt3.sh "$ROOTFS_DIR" "$OUTPUT_TAR"

base-image-script/alpine-image_pt2.sh

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+#!/bin/bash
+# Copyright (c) 2025 fithwum
+# All rights reserved
+echo "[CHROOT] Inside Alpine rootfs"
+
+echo "[CHROOT] Updating system..."
+apk update
+apk upgrade
+
+echo "[CHROOT] Optional cleanup of packages"
+# apk del some-unneeded-package
+
+echo "[CHROOT] Cleaning apk cache..."
+rm -rf /var/cache/apk/*
+
+echo "[CHROOT] Done. Type 'exit' to return to host script."
+exit

base-image-script/alpine-image_pt3.sh

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+#!/bin/bash
+# Copyright (c) 2025 fithwum
+# All rights reserved
+set -e
+
+ROOTFS_DIR="$1"
+OUTPUT_TAR="$2"
+
+echo "[INFO] Unmounting system dirs..."
+sudo umount -lf "$ROOTFS_DIR/dev"
+sudo umount -lf "$ROOTFS_DIR/proc"
+sudo umount -lf "$ROOTFS_DIR/sys"
+
+echo "[INFO] Cleaning up chroot script..."
+sudo rm -f "$ROOTFS_DIR/alpine-base_pt2.sh"
+
+echo "[INFO] Creating tarball: $OUTPUT_TAR"
+sudo tar -czf "$OUTPUT_TAR" -C "$ROOTFS_DIR" .
+
+echo "[INFO] Image size:"
+du -sh "$OUTPUT_TAR"
+
+# OPTIONAL FTP upload
+ echo "[INFO] Uploading via FTP..."
+ ftp-upload -v -h <IP> -u <USER> --password <PASS> -d /path "$OUTPUT_TAR"
+
+echo "[INFO] Cleaning up rootfs directory..."
+sudo rm -rf "$ROOTFS_DIR"
+
+echo "[INFO] Done."