Caché persistente de zig + bootstrap reproducible del .dev-fs
- `BuildConfig.cache_root` (override `HAMMER_CACHE`): bindea `/cache` al sandbox y exporta `ZIG_GLOBAL_CACHE_DIR=/cache/zig`. Evita ~30s de recompilación de musl en cada build. - `scripts/bootstrap-devfs.sh`: idempotente, descarga+verifica alpine-minirootfs 3.23.4 y zig 0.16.0 con sha256 fijo, instala build tools en el rootfs vía apk bajo bwrap. - `make_tree_read_only`: solo archivos regulares pierden `w`; los directorios conservan 0o755 para no estorbar GC ni `rm -rf` administrativo. La inmutabilidad estricta del store se delega al mount RO de la distro propia. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Sergio
co-authored by
Claude Opus 4.7
Claude Opus 4.7
parent
736e73e2ef
commit
e53877a532
Executable
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#!/usr/bin/env bash
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# bootstrap-devfs.sh — Prepara .dev-fs/ con todo lo que hammer-build necesita:
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# 1. Rootfs Alpine minirootfs como base hermética del sandbox.
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# 2. Compilador zig oficial bajo .dev-fs/tools/zig (symlink versionado).
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# 3. Build tools (make, autoconf, automake, m4, patch, coreutils, libtool,
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# pkgconf, bash) instaladas dentro del rootfs con apk.
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# 4. Directorios de caché y work para builds posteriores.
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#
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# Idempotente: cada paso se salta si ya hizo. Reinvocar tras un cambio de
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# versión actualiza in-place.
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#
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# Variables (override por entorno):
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# ALPINE_BRANCH rama de Alpine (default v3.23)
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# ALPINE_VER versión exacta del tarball (default 3.23.4)
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# ALPINE_SHA256 sha256 del tarball (verificado obligatorio)
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# ZIG_VER versión de zig (default 0.16.0)
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# ZIG_SHA256 sha256 del tarball zig
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#
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# Uso:
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# ./scripts/bootstrap-devfs.sh # bootstrap completo
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# ./scripts/bootstrap-devfs.sh --skip-apk # sólo rootfs + zig
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# ./scripts/bootstrap-devfs.sh --force-zig # re-descarga zig
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set -euo pipefail
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ALPINE_BRANCH="${ALPINE_BRANCH:-v3.23}"
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ALPINE_VER="${ALPINE_VER:-3.23.4}"
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ALPINE_SHA256="${ALPINE_SHA256:-85498865362aa7ebececa0d725a2f2e4db7ac4e4b2850b8df21645afa0d03ee3}"
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ZIG_VER="${ZIG_VER:-0.16.0}"
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ZIG_SHA256="${ZIG_SHA256:-70e49664a74374b48b51e6f3fdfbf437f6395d42509050588bd49abe52ba3d00}"
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SKIP_APK=0
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FORCE_ZIG=0
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FORCE_ROOTFS=0
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for arg in "$@"; do
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case "$arg" in
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--skip-apk) SKIP_APK=1 ;;
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--force-zig) FORCE_ZIG=1 ;;
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--force-rootfs) FORCE_ROOTFS=1 ;;
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-h|--help)
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sed -n '2,/^$/p' "$0" | sed 's/^# \?//'
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exit 0 ;;
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*)
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echo "argumento desconocido: $arg" >&2
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exit 1 ;;
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esac
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done
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REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
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DEVFS="$REPO_ROOT/.dev-fs"
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ROOTFS="$DEVFS/alpine"
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TOOLS="$DEVFS/tools"
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ZIG_DIR="$TOOLS/zig-x86_64-linux-$ZIG_VER"
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ZIG_LINK="$TOOLS/zig"
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CACHE="$DEVFS/cache"
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WORK="$REPO_ROOT/work"
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log() { printf '\033[1;34m==>\033[0m %s\n' "$*"; }
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ok() { printf '\033[1;32m✓\033[0m %s\n' "$*"; }
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mkdir -p "$DEVFS" "$TOOLS" "$CACHE" "$WORK"
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# --- 1. Rootfs Alpine ---------------------------------------------------------
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if [[ $FORCE_ROOTFS -eq 1 ]] && [[ -d "$ROOTFS" ]]; then
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log "rootfs: --force-rootfs ⇒ borro $ROOTFS"
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rm -rf "$ROOTFS"
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fi
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if [[ -f "$ROOTFS/bin/busybox" ]]; then
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ok "rootfs Alpine ya presente en $ROOTFS"
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else
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log "rootfs: descargando alpine-minirootfs $ALPINE_VER"
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tar="$DEVFS/alpine-minirootfs-$ALPINE_VER.tar.gz"
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url="https://dl-cdn.alpinelinux.org/alpine/$ALPINE_BRANCH/releases/x86_64/alpine-minirootfs-$ALPINE_VER-x86_64.tar.gz"
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curl -fsSL "$url" -o "$tar"
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echo "$ALPINE_SHA256 $tar" | sha256sum -c -
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mkdir -p "$ROOTFS"
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tar -xzf "$tar" -C "$ROOTFS"
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rm -f "$tar"
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ok "rootfs Alpine $ALPINE_VER extraído"
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fi
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# --- 2. Compilador zig --------------------------------------------------------
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if [[ $FORCE_ZIG -eq 1 ]] && [[ -e "$ZIG_DIR" ]]; then
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log "zig: --force-zig ⇒ borro $ZIG_DIR"
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rm -rf "$ZIG_DIR"
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fi
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if [[ -x "$ZIG_LINK/zig" ]]; then
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ok "zig $ZIG_VER ya presente en $ZIG_LINK"
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else
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log "zig: descargando $ZIG_VER"
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tar="$TOOLS/zig.tar.xz"
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url="https://ziglang.org/download/$ZIG_VER/zig-x86_64-linux-$ZIG_VER.tar.xz"
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curl -fsSL "$url" -o "$tar"
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echo "$ZIG_SHA256 $tar" | sha256sum -c -
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tar -xJf "$tar" -C "$TOOLS"
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rm -f "$tar"
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ln -sfn "zig-x86_64-linux-$ZIG_VER" "$ZIG_LINK"
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ok "zig $ZIG_VER instalado, symlink $ZIG_LINK"
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fi
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# --- 3. Build tools en el rootfs (apk add) ------------------------------------
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if [[ $SKIP_APK -eq 1 ]]; then
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log "apk: --skip-apk ⇒ saltando build tools"
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else
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NEEDED="make autoconf automake m4 patch coreutils libtool pkgconf bash"
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missing=""
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for pkg in $NEEDED; do
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# apk info -e devuelve el paquete si está instalado, vacío si no.
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if ! bwrap --bind "$ROOTFS" / --proc /proc --dev /dev --unshare-all \
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--setenv PATH /usr/bin:/usr/sbin:/bin:/sbin \
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/sbin/apk info -e "$pkg" >/dev/null 2>&1; then
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missing="$missing $pkg"
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fi
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done
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if [[ -n "$missing" ]]; then
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log "apk: instalando paquetes faltantes:$missing"
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bwrap --bind "$ROOTFS" / --proc /proc --dev /dev \
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--ro-bind /etc/resolv.conf /etc/resolv.conf --share-net \
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/sbin/apk update >/dev/null
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bwrap --bind "$ROOTFS" / --proc /proc --dev /dev \
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--ro-bind /etc/resolv.conf /etc/resolv.conf --share-net \
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/sbin/apk add $missing
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fi
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ok "build tools presentes en el rootfs ($NEEDED)"
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fi
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# --- 4. Resumen ---------------------------------------------------------------
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cat <<EOF
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bootstrap-devfs.sh — OK
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rootfs: $ROOTFS
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zig: $ZIG_LINK ($("$ZIG_LINK/zig" version))
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cache: $CACHE
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work: $WORK
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Variables que la CLI ya recoge por defecto (override con env vars):
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HAMMER_ROOTFS = $ROOTFS
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HAMMER_ZIG = $ZIG_LINK
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HAMMER_CACHE = $CACHE # vacío ("") desactiva la caché
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HAMMER_WORK = $WORK
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EOF
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