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#!/usr/bin/env python3
import hashlib
import json
import os
import shutil
import subprocess
import sys
from optparse import OptionParser
def log(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
def fail(s):
log(s)
sys.exit(1)
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 create_blobs(blobs, *, root):
os.makedirs(os.path.join(root, "KNOWN"))
for blob in blobs:
blob_bin = blob.encode('utf-8')
with open(os.path.join(root, "KNOWN", git_hash(blob_bin)), "wb") as f:
f.write(blob_bin)
def build_known(desc, *, root):
return os.path.join(root, "KNOWN", desc["data"]["id"])
def link(src, dest):
os.makedirs(os.path.dirname(dest), exist_ok=True)
os.symlink(src, dest)
def build_local(desc, *, root, config):
repo_name = desc["data"]["repository"]
repo = config["repositories"][repo_name]["workspace_root"]
rel_path = desc["data"]["path"]
if repo[0] == "file":
return os.path.join(repo[1], rel_path)
fail("Unsupported repository root %r" % (repo,))
def build_tree(desc, *, config, root, graph):
tree_id = desc["data"]["id"]
tree_dir = os.path.normpath(os.path.join(root, "TREE", tree_id))
if os.path.isdir(tree_dir):
return tree_dir
os.makedirs(tree_dir)
tree_desc = graph["trees"][tree_id]
for location, desc in tree_desc.items():
link(build(desc, config=config, root=root, graph=graph),
os.path.join(tree_dir, location))
return tree_dir
def run_action(action_id, *, config, root, graph):
action_dir = os.path.normpath(os.path.join(root, "ACTION", action_id))
if os.path.isdir(action_dir):
return action_dir
os.makedirs(action_dir)
action_desc = graph["actions"][action_id]
for location, desc in action_desc["input"].items():
link(build(desc, config=config, root=root, graph=graph),
os.path.join(action_dir, location))
cmd = action_desc["command"]
env = action_desc.get("env")
log("Running %r with env %r for action %r"
% (cmd, env, action_id))
for out in action_desc["output"]:
os.makedirs(os.path.join(action_dir, os.path.dirname(out)),
exist_ok=True)
subprocess.run(cmd, env=env, cwd=action_dir, check=True)
return action_dir
def build_action(desc, *, config, root, graph):
action_dir = run_action(desc["data"]["id"], config=config, root=root, graph=graph)
return os.path.join(action_dir, desc["data"]["path"])
def build(desc, *, config, root, graph):
if desc["type"] == "TREE":
return build_tree(desc, config=config, root=root, graph=graph)
if desc["type"] == "ACTION":
return build_action(desc, config=config, root=root, graph=graph)
if desc["type"] == "KNOWN":
return build_known(desc, root=root)
if desc["type"] == "LOCAL":
return build_local(desc, root=root, config=config)
fail("Don't know how to build artifact %r" % (desc,))
def traverse(*, graph, to_build, out, root, config):
os.makedirs(out, exist_ok=True)
os.makedirs(root, exist_ok=True)
create_blobs(graph["blobs"], root=root)
for location, artifact in to_build.items():
link(build(artifact, config=config, root=root, graph=graph),
os.path.join(out, location))
def main():
parser = OptionParser()
parser.add_option("-C", dest="repository_config",
help="Repository-description file to use",
metavar="FILE")
parser.add_option("-o", dest="output_directory",
help="Directory to place output to")
parser.add_option("--local_build_root", dest="local_build_root",
help="Root for storing intermediate outputs",
metavar="PATH")
parser.add_option("--default_workspace", dest="default_workspace",
help="Workspace root to use if none is specified",
metavar="PATH")
(options, args) = parser.parse_args()
if len(args) != 2:
fail("usage: %r <graph> <targets_to_build>"
% (sys.argv[0],))
with open(args[0]) as f:
graph = json.load(f)
with open(args[1]) as f:
to_build = json.load(f)
out = os.path.abspath(options.output_directory or "out-boot")
root = os.path.abspath(options.local_build_root or ".just-boot")
with open(options.repository_config or "repo-conf.json") as f:
config = json.load(f)
if options.default_workspace:
ws_root = os.path.abspath(options.default_workspace)
repos = config.get("repositories", {}).keys()
for repo in repos:
if not "workspace_root" in config["repositories"][repo]:
config["repositories"][repo]["workspace_root"] = ["file", ws_root]
traverse(graph=graph, to_build=to_build, out=out, root=root, config=config)
if __name__ == "__main__":
main()
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