initial docker build support

Author: lrvick

Dockerfile

@@ -0,0 +1,13 @@
+FROM local/stage0 as stage0
+
+FROM debian as fetch
+RUN apt update && apt install -y curl gcc
+ADD . live-bootstrap
+WORKDIR live-bootstrap
+RUN ./download-distfiles.sh
+RUN mv target/ /rootfs/
+
+FROM scratch as build
+COPY --from=fetch /rootfs .
+ENV PATH=/bin
+RUN ["/bootstrap-seeds/POSIX/x86/kaem-optional-seed"]

rootfs.py

@@ -29,7 +29,7 @@ def create_configuration_file(args):
     config_path = os.path.join('steps', 'bootstrap.cfg')
     with open(config_path, "w", encoding="utf_8") as config:
         config.write(f"FORCE_TIMESTAMPS={args.force_timestamps}\n")
-        config.write(f"CHROOT={args.chroot or args.bwrap}\n")
+        config.write(f"CHROOT={args.chroot or args.bwrap or args.docker}\n")
         config.write(f"UPDATE_CHECKSUMS={args.update_checksums}\n")
         config.write(f"JOBS={args.cores}\n")
         config.write(f"SWAP_SIZE={args.swap}\n")
@@ -62,6 +62,8 @@ def main():
                         action="store_true")
     parser.add_argument("-bw", "--bwrap", help="Run inside a bwrap sandbox",
                         action="store_true")
+    parser.add_argument("-do", "--docker", help="Run inside a docker build",
+                        action="store_true")
     parser.add_argument("-t", "--target", help="Target directory",
                         default="target")
     parser.add_argument("--tmpfs", help="Use a tmpfs on target",
@@ -121,15 +123,17 @@ def check_types():
             count += 1
         if args.bwrap:
             count += 1
+        if args.docker:
+            count += 1
         if args.bare_metal:
             count += 1
         return count
 
     if check_types() > 1:
-        raise ValueError("No more than one of qemu, chroot, bwrap, bare metal"
+        raise ValueError("No more than one of qemu, chroot, bwrap, docker, bare metal"
                          "may be used.")
     if check_types() == 0:
-        raise ValueError("One of qemu, chroot, bwrap, or bare metal must be selected.")
+        raise ValueError("One of qemu, chroot, bwrap, docker, or bare metal must be selected.")
 
     # Arch validation
     if args.arch != "x86":
@@ -199,6 +203,16 @@ def bootstrap(args, generator, target, size):
         init = os.path.join(os.sep, 'bootstrap-seeds', 'POSIX', arch, 'kaem-optional-seed')
         run_as_root('env', '-i', 'PATH=/bin', chroot_binary, generator.target_dir, init)
 
+    elif args.docker:
+        generator.prepare(target, using_kernel=False)
+        arch = stage0_arch_map.get(args.arch, args.arch)
+        init = os.path.join(os.sep, 'bootstrap-seeds', 'POSIX', arch, 'kaem-optional-seed')
+        print(generator.target_dir, init)
+        run('env', '-i', 'DOCKER_BUILDKIT=1', 'docker', 'build',
+                                                 '--progress=plain',
+                                                 '-t', 'local/live',
+                                                 '.')
+
     elif args.bwrap:
         init = '/init'
         if not args.internal_ci or args.internal_ci == "pass1":