cx-git-agent
86 lines
2.7 KiB
Bash
Executable File
86 lines
2.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# cxos/vendor/busybox/build.sh — build a static busybox + install into rootfs.
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#
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# Usage:
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# build.sh # x86_64, install into dist/cxos/rootfs
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# build.sh --arch aarch64
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# build.sh --rootfs /path/to/rootfs
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# build.sh --dry
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#
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# After install:
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# <rootfs>/bin/busybox static binary (~1 MB)
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# <rootfs>/bin/* ./sbin/* symlinks to busybox (one per applet)
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set -euo pipefail
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ARCH="x86_64"
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DRY=0
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ROOTFS=""
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for ((i=1; i<=$#; i++)); do
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case "${!i}" in
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--arch) ((i++)); ARCH="${!i}" ;;
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--rootfs) ((i++)); ROOTFS="${!i}" ;;
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--dry) DRY=1 ;;
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-h|--help) sed -n '2,12p' "$0" | sed 's/^# \{0,1\}//'; exit 0 ;;
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*) echo "build.sh: unknown arg: ${!i}" >&2; exit 2 ;;
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esac
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done
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HERE="$(cd "$(dirname "$0")" && pwd)"
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REPO_ROOT="$(cd "$HERE/../../.." && pwd)"
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PINNED="$HERE/PINNED.json"
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FRAGMENT="$HERE/cxos.config.fragment"
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VERSION="$(python3 -c 'import json,sys;print(json.load(open(sys.argv[1]))["version"])' "$PINNED")"
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EXTRACTED_DIR="$(python3 -c 'import json,sys;print(json.load(open(sys.argv[1]))["extracted_dir"])' "$PINNED")"
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SRC="$HERE/src/$EXTRACTED_DIR"
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ROOTFS="${ROOTFS:-$REPO_ROOT/dist/cxos/rootfs}"
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case "$ARCH" in
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x86_64) CROSS="" ;;
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aarch64) CROSS="${CROSS_COMPILE:-aarch64-linux-gnu-}" ;;
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*) echo "build.sh: unsupported arch: $ARCH" >&2; exit 2 ;;
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esac
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JOBS="${JOBS:-$(nproc 2>/dev/null || echo 2)}"
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echo "==> busybox ${VERSION} (${ARCH}) -> ${ROOTFS}"
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echo " src : ${SRC}"
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echo " fragment: ${FRAGMENT}"
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echo " cross : ${CROSS:-<native>}"
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echo " jobs : ${JOBS}"
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if [[ "$DRY" == "1" ]]; then
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echo "==> dry-run; not compiling"
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exit 0
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fi
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[[ -d "$SRC" ]] || { echo "build.sh: source not extracted; run fetch.sh first" >&2; exit 1; }
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cd "$SRC"
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make CROSS_COMPILE="$CROSS" defconfig
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# Apply fragment overrides line-by-line. Lines that start with '#' or are
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# blank are skipped. KEY=VALUE lines replace any existing KEY= line, or are
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# appended if absent.
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while IFS= read -r line; do
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[[ -z "$line" || "$line" == \#* ]] && continue
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key="${line%%=*}"
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if grep -qE "^# ${key} is not set$|^${key}=" .config; then
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sed -i -E "s|^# ${key} is not set\$|${line}|; s|^${key}=.*|${line}|" .config
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else
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printf '%s\n' "$line" >> .config
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fi
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done < "$FRAGMENT"
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make CROSS_COMPILE="$CROSS" oldconfig
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make CROSS_COMPILE="$CROSS" -j"$JOBS" busybox
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mkdir -p "$ROOTFS"
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make CROSS_COMPILE="$CROSS" CONFIG_PREFIX="$ROOTFS" install
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# busybox install creates /linuxrc symlink — pointless on initramfs (we have
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# our own /init). Drop it.
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rm -f "$ROOTFS/linuxrc"
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echo "==> installed: $(find "$ROOTFS/bin" "$ROOTFS/sbin" -maxdepth 1 -mindepth 1 2>/dev/null | wc -l) applets"
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