Merge pull request #354 from Googulator/script-fixes

Python script fixes and improvements

lib/generator.py

@@ -14,6 +14,7 @@ import shutil
 import tarfile
 import requests
 
+# pylint: disable=too-many-instance-attributes
 class Generator():
     """
     Class responsible for generating the basic media to be consumed.
@@ -22,24 +23,25 @@ class Generator():
     git_dir = os.path.join(os.path.dirname(os.path.join(__file__)), '..')
     distfiles_dir = os.path.join(git_dir, 'distfiles')
 
-    # pylint: disable=too-many-arguments
+    def __init__(self, arch, external_sources, early_preseed, repo_path):
-    def __init__(self, tmpdir, arch, external_sources,
-                 early_preseed, repo_path):
         self.arch = arch
         self.early_preseed = early_preseed
         self.external_sources = external_sources
         self.repo_path = repo_path
-        self.tmpdir = tmpdir
+        self.source_manifest = self.get_source_manifest(not self.external_sources)
-        self.tmp_dir = tmpdir.path
+        self.tmp_dir = None
-        self.external_dir = os.path.join(self.tmp_dir, 'external')
+        self.external_dir = None
 
-    def prepare(self, using_kernel=False, kernel_bootstrap=False):
+    def prepare(self, tmpdir, using_kernel=False, kernel_bootstrap=False, target_size=0):
         """
         Prepare basic media of live-bootstrap.
         /steps -- contains steps to be built
         / -- contains seed to allow steps to be built, containing custom
              scripts and stage0-posix
         """
+        self.tmp_dir = tmpdir.path
+        self.external_dir = os.path.join(self.tmp_dir, 'external')
+
         # We use ext3 here; ext4 actually has a variety of extensions that
         # have been added with varying levels of recency
         # Linux 4.9.10 does not support a bunch of them
@@ -55,14 +57,17 @@ class Generator():
             self.tmp_dir = init_path
 
             if self.repo_path or self.external_sources:
-                self.tmpdir.add_disk("external", filesystem="ext3")
+                tmpdir.add_disk("external", filesystem="ext3")
-                self.tmpdir.mount_disk("external", "external")
+                tmpdir.mount_disk("external", "external")
             else:
-                self.tmpdir.add_disk("external", tabletype="none")
+                self.external_dir = os.path.join(self.tmp_dir, 'external')
         elif using_kernel:
             self.tmp_dir = os.path.join(self.tmp_dir, 'disk')
-            self.tmpdir.add_disk("disk", filesystem="ext3")
+            tmpdir.add_disk("disk",
-            self.tmpdir.mount_disk("disk", "disk")
+                            filesystem="ext3",
+                            size=(target_size + "M") if target_size else "16G",
+                            bootable=True)
+            tmpdir.mount_disk("disk", "disk")
             self.external_dir = os.path.join(self.tmp_dir, 'external')
 
         os.makedirs(self.external_dir, exist_ok=True)
@@ -88,30 +93,29 @@ class Generator():
             shutil.copytree(self.repo_path, repo_dir)
 
         if kernel_bootstrap:
-            self.create_builder_hex0_disk_image(os.path.join(self.tmp_dir, 'disk.img'))
+            self.create_builder_hex0_disk_image(self.tmp_dir + '.img', target_size)
 
         if kernel_bootstrap and (self.external_sources or self.repo_path):
-            self.tmpdir.umount_disk('external')
+            tmpdir.umount_disk('external')
         elif using_kernel:
-            self.tmpdir.umount_disk('disk')
+            tmpdir.umount_disk('disk')
 
     def steps(self):
         """Copy in steps."""
-        source_manifest = self.get_source_manifest()
+        self.get_packages()
-        self.get_packages(source_manifest)
 
         shutil.copytree(os.path.join(self.git_dir, 'steps'), os.path.join(self.tmp_dir, 'steps'))
 
     def stage0_posix(self):
         """Copy in all of the stage0-posix"""
         stage0_posix_base_dir = os.path.join(self.git_dir, 'seed', 'stage0-posix')
-        for f in os.listdir(stage0_posix_base_dir):
+        for entry in os.listdir(stage0_posix_base_dir):
-            orig = os.path.join(stage0_posix_base_dir, f)
+            orig = os.path.join(stage0_posix_base_dir, entry)
-            to = os.path.join(self.tmp_dir, f)
+            target = os.path.join(self.tmp_dir, entry)
             if os.path.isfile(orig):
-                shutil.copy2(orig, to)
+                shutil.copy2(orig, target)
             else:
-                shutil.copytree(orig, to)
+                shutil.copytree(orig, target)
 
         arch = stage0_arch_map.get(self.arch, self.arch)
         kaem_optional_seed = os.path.join(self.git_dir, 'seed', 'stage0-posix', 'bootstrap-seeds',
@@ -121,11 +125,12 @@ class Generator():
     def seed(self):
         """Copy in extra seed files"""
         seed_dir = os.path.join(self.git_dir, 'seed')
-        for f in os.listdir(seed_dir):
+        for entry in os.listdir(seed_dir):
-            if os.path.isfile(os.path.join(seed_dir, f)):
+            if os.path.isfile(os.path.join(seed_dir, entry)):
-                shutil.copy2(os.path.join(seed_dir, f), os.path.join(self.tmp_dir, f))
+                shutil.copy2(os.path.join(seed_dir, entry), os.path.join(self.tmp_dir, entry))
 
-    def add_fiwix_files(self, file_list_path, dirpath):
+    @staticmethod
+    def add_fiwix_files(file_list_path, dirpath):
         """Add files to the list to populate Fiwix file system"""
         for root, _, filepaths in os.walk(dirpath):
             if 'stage0-posix' in root:
@@ -151,13 +156,11 @@ class Generator():
     def distfiles(self):
         """Copy in distfiles"""
         def copy_no_network_distfiles(out):
-            # Note that no network == no disk for kernel bootstrap mode
+            # Note that "no disk" implies "no network" for kernel bootstrap mode
-            pre_src_path = os.path.join(self.git_dir, 'steps', 'pre-network-sources')
+            for file in self.source_manifest:
-            with open(pre_src_path, 'r', encoding="utf-8") as source_list:
+                file = file[3].strip()
-                for file in source_list.readlines():
+                shutil.copy2(os.path.join(self.distfiles_dir, file),
-                    file = file.strip()
+                             os.path.join(out, file))
-                    shutil.copy2(os.path.join(self.distfiles_dir, file),
-                                 os.path.join(out, file))
 
         early_distfile_dir = os.path.join(self.tmp_dir, 'external', 'distfiles')
         main_distfile_dir = os.path.join(self.external_dir, 'distfiles')
@@ -167,7 +170,6 @@ class Generator():
             copy_no_network_distfiles(early_distfile_dir)
 
         if self.external_sources:
-            os.mkdir(main_distfile_dir)
             shutil.copytree(self.distfiles_dir, main_distfile_dir)
         else:
             os.mkdir(main_distfile_dir)
@@ -224,7 +226,7 @@ class Generator():
 
         os.chdir(save_cwd)
 
-    def create_builder_hex0_disk_image(self, image_file_name):
+    def create_builder_hex0_disk_image(self, image_file_name, size):
         """Create builder-hex0 disk image"""
         shutil.copyfile(os.path.join('seed', 'stage0-posix', 'bootstrap-seeds',
                                      'NATIVE', 'x86', 'builder-hex0-x86-stage1.img'),
@@ -252,13 +254,13 @@ class Generator():
             image_file.write(b'\0' * round_up)
         current_size += round_up
 
-        # fill file with zeros up to desired size, one megabyte at a time
+        # extend file up to desired size
-        with open(image_file_name, 'ab') as image_file:
+        if current_size < size * megabyte:
-            while current_size < 16384 * megabyte:
+            with open(image_file_name, 'ab') as image_file:
-                image_file.write(b'\0' * megabyte)
+                image_file.truncate(size * megabyte)
-                current_size += megabyte
 
-    def check_file(self, file_name, expected_hash):
+    @staticmethod
+    def check_file(file_name, expected_hash):
         """Check hash of downloaded source file."""
         with open(file_name, "rb") as downloaded_file:
             downloaded_content = downloaded_file.read() # read entire file as bytes
@@ -271,7 +273,8 @@ actual:   {readable_hash}\n\
 When in doubt, try deleting the file in question -- it will be downloaded again when running \
 this script the next time")
 
-    def download_file(self, url, directory, file_name):
+    @staticmethod
+    def download_file(url, directory, file_name):
         """
         Download a single source archive.
         """
@@ -293,45 +296,53 @@ this script the next time")
                 with open(abs_file_name, 'wb') as target_file:
                     target_file.write(response.raw.read())
             else:
-                raise requests.HTTPError("Download failed.")
+                raise requests.HTTPError("Download failed: HTTP " +
+                    response.status_code + " " + response.reason)
         return abs_file_name
 
-    def get_packages(self, source_manifest):
+    def get_packages(self):
         """Prepare remaining sources"""
-        for line in source_manifest.split("\n"):
+        for line in self.source_manifest:
-            line = line.strip().split(" ")
-
             path = self.download_file(line[2], line[1], line[3])
             self.check_file(path, line[0])
 
     @classmethod
-    def get_source_manifest(cls):
+    def get_source_manifest(cls, pre_network=False):
         """
         Generate a source manifest for the system.
         """
-        manifest_lines = []
+        entries = []
         directory = os.path.relpath(cls.distfiles_dir, cls.git_dir)
 
         # Find all source files
         steps_dir = os.path.join(cls.git_dir, 'steps')
-        for file in os.listdir(steps_dir):
+        with open(os.path.join(steps_dir, 'manifest'), 'r', encoding="utf_8") as file:
-            if os.path.isdir(os.path.join(steps_dir, file)):
+            for line in file:
-                sourcef = os.path.join(steps_dir, file, "sources")
+                if pre_network and line.strip().startswith("improve: ") and "network" in line:
+                    break
+
+                if not line.strip().startswith("build: "):
+                    continue
+
+                step = line.split(" ")[1].split("#")[0].strip()
+                sourcef = os.path.join(steps_dir, step, "sources")
                 if os.path.exists(sourcef):
                     # Read sources from the source file
                     with open(sourcef, "r", encoding="utf_8") as sources:
-                        for line in sources.readlines():
+                        for source in sources.readlines():
-                            line = line.strip().split(" ")
+                            source = source.strip().split(" ")
 
-                            if len(line) > 2:
+                            if len(source) > 2:
-                                file_name = line[2]
+                                file_name = source[2]
                             else:
                                 # Automatically determine file name based on URL.
-                                file_name = os.path.basename(line[0])
+                                file_name = os.path.basename(source[0])
 
-                            manifest_lines.append(f"{line[1]} {directory} {line[0]} {file_name}")
+                            entry = (source[1], directory, source[0], file_name)
+                            if entry not in entries:
+                                entries.append(entry)
 
-        return "\n".join(manifest_lines)
+        return entries
 
 stage0_arch_map = {
     "amd64": "AMD64",

lib/tmpdir.py

@@ -60,10 +60,21 @@ class Tmpdir:
         self._type = TmpType.TMPFS
 
     # pylint: disable=too-many-arguments
-    def add_disk(self, name, size="16G", filesystem="ext4", tabletype="msdos", mkfs_args=None):
+    def add_disk(self,
+                 name,
+                 size="16G",
+                 filesystem="ext4",
+                 tabletype="msdos",
+                 bootable=False,
+                 mkfs_args=None):
         """Add a disk"""
         disk_path = os.path.join(self.path, f"{name}.img")
-        self._disks[name] = create_disk(disk_path, tabletype, filesystem, size, mkfs_args=mkfs_args)
+        self._disks[name] = create_disk(disk_path,
+                                        tabletype,
+                                        filesystem,
+                                        size,
+                                        bootable,
+                                        mkfs_args)
         self._disk_filesystems[name] = filesystem
         # Allow executing user to access it
         run_as_root("chown", getpass.getuser(), self._disks[name])
@@ -87,4 +98,4 @@ class Tmpdir:
 
     def get_disk(self, name):
         """Get the path to a device of a disk"""
-        return self._disks[name]
+        return self._disks.get(name)

lib/utils.py

@@ -31,7 +31,8 @@ def run_as_root(*args, **kwargs):
         return run("sudo", *args, **kwargs)
     return run(*args, **kwargs)
 
-def create_disk(image, disk_type, fs_type, size, mkfs_args=None):
+# pylint: disable=too-many-arguments
+def create_disk(image, disk_type, fs_type, size, bootable=False, mkfs_args=None):
     """Create a disk image, with a filesystem on it"""
     if mkfs_args is None:
         mkfs_args = []
@@ -42,7 +43,7 @@ def create_disk(image, disk_type, fs_type, size, mkfs_args=None):
     # Create the partition
     if disk_type != "none":
         run_as_root('parted', '--script', image, 'mklabel', disk_type, 'mkpart',
-                'primary', fs_type, '0%', '100%')
+                'primary', fs_type, '1GiB' if bootable else '1MiB', '100%')
         run_as_root('partprobe', loop_dev)
         run_as_root('mkfs.' + fs_type, loop_dev + "p1", *mkfs_args)
     return loop_dev

rootfs.py

@@ -30,7 +30,6 @@ def create_configuration_file(args):
     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_ONLY_SYSA={args.bwrap}\n")
         config.write(f"UPDATE_CHECKSUMS={args.update_checksums}\n")
         config.write(f"JOBS={args.cores}\n")
         config.write(f"INTERNAL_CI={args.internal_ci}\n")
@@ -39,7 +38,7 @@ def create_configuration_file(args):
             if args.repo or args.external_sources:
                 config.write("DISK=sdb1\n")
             else:
-                config.write("DISK=sdb\n")
+                config.write("DISK=sda\n")
             config.write("KERNEL_BOOTSTRAP=True\n")
         else:
             config.write("DISK=sda1\n")
@@ -98,7 +97,9 @@ def main():
                         default="qemu-system-x86_64")
     parser.add_argument("-qr", "--qemu-ram", help="Memory (in megabytes) allocated to QEMU VM",
                         default=4096)
-    parser.add_argument("-qk", "--kernel", help="Custom sysa kernel to use")
+    parser.add_argument("-qs", "--target-size", help="Size of the target image (for QEMU only)",
+                        default="16G")
+    parser.add_argument("-qk", "--kernel", help="Custom early kernel to use")
 
     parser.add_argument("-b", "--bare-metal", help="Build images for bare metal",
                         action="store_true")
@@ -136,15 +137,24 @@ def main():
     if int(args.cores) < 1:
         raise ValueError("Must use one or more cores.")
 
+    # Target image size validation
+    if args.qemu:
+        if int(str(args.target_size).rstrip('gGmM')) < 1:
+            raise ValueError("Please specify a positive target size for qemu.")
+        args.target_size = (int(str(args.target_size).rstrip('gGmM')) *
+            (1024 if str(args.target_size).lower().endswith('g') else 1))
+    else:
+        args.target_size = 0
+
     # bootstrap.cfg
     try:
-        os.remove(os.path.join('sysa', 'bootstrap.cfg'))
+        os.remove(os.path.join('steps', 'bootstrap.cfg'))
     except FileNotFoundError:
         pass
     if not args.no_create_config:
         create_configuration_file(args)
     else:
-        with open(os.path.join('sysa', 'bootstrap.cfg'), 'a', encoding='UTF-8'):
+        with open(os.path.join('steps', 'bootstrap.cfg'), 'a', encoding='UTF-8'):
             pass
 
     # tmpdir
@@ -152,17 +162,16 @@ def main():
     if args.tmpfs:
         tmpdir.tmpfs(size=args.tmpfs_size)
 
-    generator = Generator(tmpdir=tmpdir,
+    generator = Generator(arch=args.arch,
-                          arch=args.arch,
                           external_sources=args.external_sources,
                           repo_path=args.repo,
                           early_preseed=args.early_preseed)
 
-    bootstrap(args, generator, tmpdir)
+    bootstrap(args, generator, tmpdir, args.target_size)
 
-def bootstrap(args, generator, tmpdir):
+def bootstrap(args, generator, tmpdir, size):
     """Kick off bootstrap process."""
-    print(f"Bootstrapping {args.arch} -- SysA")
+    print(f"Bootstrapping {args.arch}")
     if args.chroot:
         find_chroot = """
 import shutil
@@ -171,7 +180,7 @@ print(shutil.which('chroot'))
         chroot_binary = run_as_root('python3', '-c', find_chroot,
                                     capture_output=True).stdout.decode().strip()
 
-        generator.prepare(using_kernel=False)
+        generator.prepare(tmpdir, 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')
@@ -179,7 +188,7 @@ print(shutil.which('chroot'))
 
     elif args.bwrap:
         if not args.internal_ci or args.internal_ci == "pass1":
-            generator.prepare(using_kernel=False)
+            generator.prepare(tmpdir, 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')
@@ -200,15 +209,16 @@ print(shutil.which('chroot'))
                          init)
 
         if not args.internal_ci or args.internal_ci == "pass2" or args.internal_ci == "pass3":
-            shutil.copy2(os.path.join('sysa', 'bootstrap.cfg'),
+            os.makedirs(os.path.join(generator.tmp_dir, 'stage2', 'steps'), exist_ok=True)
-                         os.path.join('tmp', 'sysa', 'sysc_image', 'usr', 'src', 'bootstrap.cfg'))
+            shutil.copy2(os.path.join('steps', 'bootstrap.cfg'),
+                         os.path.join(generator.tmp_dir, 'stage2', 'steps', 'bootstrap.cfg'))
             run('bwrap', '--unshare-user',
                          '--uid', '0',
                          '--gid', '0',
                          '--unshare-net' if args.external_sources else None,
                          '--clearenv',
                          '--setenv', 'PATH', '/usr/bin',
-                         '--bind', generator.tmp_dir + "/sysc_image", '/',
+                         '--bind', os.path.join(generator.tmp_dir, "stage2"), '/',
                          '--dir', '/dev',
                          '--dev-bind', '/dev/null', '/dev/null',
                          '--dev-bind', '/dev/zero', '/dev/zero',
@@ -224,18 +234,20 @@ print(shutil.which('chroot'))
 
     elif args.bare_metal:
         if args.kernel:
-            generator.prepare(using_kernel=True)
+            generator.prepare(tmpdir, using_kernel=True, target_size=size)
+            image_path = os.path.join(args.tmpdir, os.path.relpath(generator.tmp_dir, args.tmpdir))
             print("Please:")
-            print("  1. Take tmp/initramfs and your kernel, boot using this.")
+            print(f"  1. Take {image_path}/initramfs and your kernel, boot using this.")
-            print("  2. Take tmp/disk.img and put this on a writable storage medium.")
+            print(f"  2. Take {image_path}/disk.img and put this on a writable storage medium.")
         else:
-            generator.prepare(kernel_bootstrap=True)
+            generator.prepare(tmpdir, kernel_bootstrap=True, target_size=size)
+            image_path = os.path.join(args.tmpdir, os.path.relpath(generator.tmp_dir, args.tmpdir))
             print("Please:")
-            print("  1. Take tmp/disk.img and write it to a boot drive and then boot it.")
+            print(f"  1. Take {image_path}.img and write it to a boot drive and then boot it.")
 
     else:
         if args.kernel:
-            generator.prepare(using_kernel=True)
+            generator.prepare(tmpdir, using_kernel=True, target_size=size)
 
             run(args.qemu_cmd,
                 '-enable-kvm',
@@ -249,17 +261,24 @@ print(shutil.which('chroot'))
                 '-nographic',
                 '-append', 'console=ttyS0 root=/dev/sda1 rootfstype=ext3 init=/init rw')
         else:
-            generator.prepare(kernel_bootstrap=True)
+            generator.prepare(tmpdir, kernel_bootstrap=True, target_size=size)
-            run(args.qemu_cmd,
+            arg_list = [
                 '-enable-kvm',
-                '-m', "4G",
+                '-m', str(args.qemu_ram) + 'M',
                 '-smp', str(args.cores),
                 '-no-reboot',
-                '-drive', 'file=' + os.path.join(generator.tmp_dir, 'disk.img') + ',format=raw',
+                '-drive', 'file=' + generator.tmp_dir + '.img' + ',format=raw'
-                '-drive', 'file=' + tmpdir.get_disk("external") + ',format=raw',
+            ]
+            if tmpdir.get_disk("external") is not None:
+                arg_list += [
+                    '-drive', 'file=' + tmpdir.get_disk("external") + ',format=raw',
+                ]
+            arg_list += [
                 '-machine', 'kernel-irqchip=split',
                 '-nic', 'user,ipv6=off,model=e1000',
-                '-nographic')
+                '-nographic'
+            ]
+            run(args.qemu_cmd, *arg_list)
 
 if __name__ == "__main__":
     main()

source_manifest.py

@@ -9,27 +9,11 @@ for the bootstrapping process.
 
 import argparse
 
-from sysa import SysA
+from lib.generator import Generator
-from sysc import SysC
 
 def main():
     """Generate a source manifest for a system"""
-    parser = argparse.ArgumentParser()
+    print('\n'.join(map(' '.join, Generator.get_source_manifest())))
-
-    parser.add_argument("-s", "--system",
-                        help="Generate source manifest for the specified systems",
-                        choices=["sysa", "sysc"],
-                        nargs="+",
-                        action="extend",
-                        required=True)
-
-    args = parser.parse_args()
-
-    if "sysa" in args.system:
-        print(SysA.get_source_manifest())
-
-    if "sysc" in args.system:
-        print(SysC.get_source_manifest())
 
 if __name__ == "__main__":
     main()

steps/manifest

@@ -16,6 +16,13 @@
 # - jump: jump (usually) to a new kernel, executes a script with that name
 #   eg, jump: fiwix
 #
+# The following directives have special significance:
+# - build directives beginning with "bash" (as well as jumps) trigger the generation of
+#   a new script
+# - the first improve directive containing "network" is used by generator.py to deduce
+#   what source files need to be downloaded in advance (files referenced after that will
+#   be downloaded during bootstrap, unless --external-sources is given)
+#
 # Other features:
 # - predicate; based on variables set in bootstrap.cfg, require for something to execute
 #   must be enclosed in brackets with spaces padded

steps/pre-network-sources

@@ -1,86 +0,0 @@
-mes-0.25.tar.gz
-nyacc-1.00.2.tar.gz
-tcc-0.9.26.tar.gz
-tcc-0.9.27.tar.bz2
-fiwix-1.4.0-lb3.tar.gz
-lwext4-1.0.0-lb1.tar.gz
-make-3.82.tar.bz2
-patch-2.5.9.tar.gz
-gzip-1.2.4.tar.gz
-tar-1.12.tar.gz
-sed-4.0.9.tar.gz
-bzip2-1.0.8.tar.gz
-coreutils-5.0.tar.bz2
-heirloom-devtools-070527.tar.bz2
-bash-2.05b.tar.gz
-flex-2.5.11.tar.gz
-tcc-0.9.27.tar.bz2
-musl-1.1.24.tar.gz
-tcc-0.9.27.tar.bz2
-musl-1.1.24.tar.gz
-tcc-0.9.27.tar.bz2
-sed-4.0.9.tar.gz
-bzip2-1.0.8.tar.gz
-m4-1.4.7.tar.gz
-flex-2.6.4.tar.gz
-bison-3.4.1.tar.gz
-bison-3.4.1.tar.gz
-bison-3.4.1.tar.gz
-grep-2.4.tar.gz
-diffutils-2.7.tar.gz
-coreutils-5.0.tar.bz2
-coreutils-6.10.tar.gz
-gawk-3.0.4.tar.gz
-perl-5.000.tar.gz
-perl-5.003.tar.gz
-perl5.004_05.tar.gz
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