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#!/usr/bin/env python3
import hashlib
import json
import os
import shutil
import subprocess
import sys
import tempfile
from pathlib import Path
# path within the repository (constants)
REPOS = "etc/repos.json"
BOOTSTRAP_CC = ["clang++", "-std=c++20", "-DBOOTSTRAP_BUILD_TOOL"]
MAIN_MODULE = ""
MAIN_TARGET = ""
MAIN_STAGE = "bin/just"
# relevant directories (global variables)
SRCDIR = os.getcwd()
WRKDIR = None
DISTDIR = []
def git_hash(content):
header = "blob {}\0".format(len(content)).encode('utf-8')
h = hashlib.sha1()
h.update(header)
h.update(content)
return h.hexdigest()
def get_checksum(filename):
with open(filename, "rb") as f:
data = f.read()
return git_hash(data)
def get_archive(*, distfile, fetch):
# Fetch the archive, if necessary. Return path to archive
for d in DISTDIR:
candidate_path = os.path.join(d, distfile)
if os.path.isfile(candidate_path):
return candidate_path
# Fetch to bootstrap working directory
fetch_dir = os.path.join(WRKDIR, "fetch")
os.makedirs(fetch_dir, exist_ok=True)
target = os.path.join(fetch_dir, distfile)
subprocess.run(["wget", "-O", target, fetch])
return target
def run(cmd, *, cwd, **kwargs):
print("Running %r in %r" % (cmd, cwd), flush=True)
subprocess.run(cmd, cwd=cwd, check=True, **kwargs)
def setup_deps():
# unpack all dependencies and return a list of
# additional C++ flags required
with open(os.path.join(SRCDIR, REPOS)) as f:
config = json.load(f)["repositories"]
include_location = os.path.join(WRKDIR, "dep_includes")
link_flags = []
os.makedirs(include_location)
for repo, total_desc in config.items():
desc = total_desc.get("repository", {})
if not isinstance(desc, dict):
# Indirect definition; we will set up the repository at the
# resolved place, which also has to be part of the global
# repository description.
continue
hints = total_desc.get("bootstrap", {})
if desc.get("type") in ["archive", "zip"]:
fetch = desc["fetch"]
distfile = desc.get("distfile") or os.path.basename(fetch)
archive = get_archive(distfile=distfile, fetch=fetch)
actual_checksum = get_checksum(archive)
expected_checksum = desc.get("content")
if actual_checksum != expected_checksum:
print("Checksum mismatch for %r. Expected %r, found %r"
% (archive, expected_checksum, actual_checksum))
print("Unpacking %r from %r" % (repo, archive))
unpack_location = os.path.join(WRKDIR, "deps", repo)
os.makedirs(unpack_location)
if desc["type"] == "zip":
subprocess.run(["unzip", "-d", ".", archive],
cwd=unpack_location, stdout=subprocess.DEVNULL)
else:
subprocess.run(["tar", "xf", archive],
cwd=unpack_location)
subdir = os.path.join(unpack_location,
desc.get("subdir", "."))
include_dir = os.path.join(subdir,
hints.get("include_dir", "."))
include_name = hints.get("include_name", repo)
os.symlink(os.path.normpath(include_dir),
os.path.join(include_location, include_name))
if "build" in hints:
run(["sh", "-c", hints["build"]], cwd=subdir)
if "link" in hints:
link_flags.extend(["-L", subdir])
if "link" in hints:
link_flags.extend(hints["link"])
return {
"include": ["-I", include_location],
"link": link_flags
}
def bootstrap():
# TODO: add package build mode, building against preinstalled dependencies
# rather than building dependencies ourselves.
print("Bootstrapping in %r from sources %r, taking files from %r"
% (WRKDIR, SRCDIR, DISTDIR))
os.makedirs(WRKDIR, exist_ok=True)
dep_flags = setup_deps();
# handle proto
src_wrkdir = os.path.join(WRKDIR, "src")
shutil.copytree(SRCDIR, src_wrkdir)
flags = ["-I", src_wrkdir] + dep_flags["include"]
cpp_files = []
for root, dirs, files in os.walk(src_wrkdir):
if 'test' in dirs:
dirs.remove('test')
if 'execution_api' in dirs:
dirs.remove('execution_api')
for f in files:
if f.endswith(".cpp"):
cpp_files.append(os.path.join(root, f))
object_files = []
for f in cpp_files:
obj_file_name =f[:-len(".cpp")] + ".o"
object_files.append(obj_file_name)
cmd = BOOTSTRAP_CC + flags + ["-c", f, "-o", obj_file_name]
run(cmd, cwd=src_wrkdir)
bootstrap_just = os.path.join(WRKDIR, "bootstrap-just")
cmd = BOOTSTRAP_CC + ["-o", bootstrap_just] + object_files + dep_flags["link"]
run(cmd, cwd=src_wrkdir)
CONF_FILE = os.path.join(WRKDIR, "repo-conf.json")
LOCAL_ROOT = os.path.join(WRKDIR, ".just")
os.makedirs(LOCAL_ROOT, exist_ok=True)
run(["sh", "-c",
"cp `./bin/just-mr.py --always_file -C %s --local_build_root=%s setup just` %s"
% (REPOS, LOCAL_ROOT, CONF_FILE)],
cwd=src_wrkdir)
GRAPH = os.path.join(WRKDIR, "graph.json")
TO_BUILD = os.path.join(WRKDIR, "to_build.json")
run([bootstrap_just, "analyse",
"-C", CONF_FILE,
"--dump_graph", GRAPH,
"--dump_artifacts_to_build", TO_BUILD,
MAIN_MODULE, MAIN_TARGET],
cwd=src_wrkdir)
run(["./bin/bootstrap-traverser.py",
"-C", CONF_FILE,
"--default_workspace", src_wrkdir,
GRAPH, TO_BUILD],
cwd=src_wrkdir)
OUT = os.path.join(WRKDIR, "out")
run(["./out-boot/%s" % (MAIN_STAGE,),
"install", "-C", CONF_FILE,
"-o", OUT, "--local_build_root", LOCAL_ROOT,
MAIN_MODULE, MAIN_TARGET],
cwd=src_wrkdir)
def main(args):
global SRCDIR
global WRKDIR
global DISTDIR
if len(args) > 1:
SRCDIR = os.path.abspath(args[1])
if len(args) > 2:
WRKDIR = os.path.abspath(args[2])
if not WRKDIR:
WRKDIR = tempfile.mkdtemp()
if not DISTDIR:
DISTDIR = [os.path.join(Path.home(), ".distfiles")]
bootstrap()
if __name__ == "__main__":
# Parse options, set DISTDIR
main(sys.argv)
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