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deps.py
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deps.py
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import json
import logging
import os
import sys
import time
from subprocess import run
from .compat import Compat, Version
from .state import STATE
from .find_julia import julia_version, find_julia
from .install_julia import log
logger = logging.getLogger('juliapkg')
### META
META_VERSION = 2 # increment whenever the format changes
def load_meta():
fn = STATE['meta']
if os.path.exists(fn):
with open(fn) as fp:
meta = json.load(fp)
if meta.get('meta_version') == META_VERSION:
return meta
def save_meta(meta):
assert isinstance(meta, dict)
assert meta.get('meta_version') == META_VERSION
fn = STATE['meta']
os.makedirs(os.path.dirname(fn), exist_ok=True)
with open(fn, 'w') as fp:
json.dump(meta, fp)
### RESOLVE
class PkgSpec:
def __init__(self, name, uuid, dev=False, version=None, path=None, url=None, rev=None):
self.name = name
self.uuid = uuid
self.dev = dev
self.version = version
self.path = path
self.url = url
self.rev = rev
def jlstr(self):
args = ['name="{}"'.format(self.name), 'uuid="{}"'.format(self.uuid)]
if self.path is not None:
args.append('path=raw"{}"'.format(self.path))
if self.url is not None:
args.append('url=raw"{}"'.format(self.url))
if self.rev is not None:
args.append('rev=raw"{}"'.format(self.rev))
return "Pkg.PackageSpec({})".format(', '.join(args))
def dict(self):
ans = {
"name": self.name,
"uuid": self.uuid,
"dev": self.dev,
"version": str(self.version),
"path": self.path,
"url": self.url,
"rev": self.rev,
}
return {k:v for (k,v) in ans.items() if v is not None}
def depsdict(self):
ans = {}
ans['uuid'] = self.uuid
if self.dev:
ans['dev'] = self.dev
if self.version is not None:
ans['version'] = str(self.version)
if self.path is not None:
ans['path'] = self.path
if self.url is not None:
ans['url'] = self.url
if self.rev is not None:
ans['rev'] = self.rev
return ans
def can_skip_resolve():
# resolve if we haven't resolved before
deps = load_meta()
if deps is None:
logger.debug('no meta file')
return False
# resolve whenever Julia changes
exe = deps["executable"]
ver = deps["version"]
exever = julia_version(exe)
if exever is None or ver != str(exever):
logger.debug('changed version %s to %s', ver, exever)
return False
# resolve when going from offline to online
offline = deps['offline']
if offline and not STATE['offline']:
logger.debug('was offline now online')
return False
# resolve whenever swapping between dev/not dev
isdev = deps['dev']
if isdev != STATE["dev"]:
logger.debug('changed dev %s to %s', isdev, STATE['dev'])
return False
# resolve whenever anything in sys.path changes
timestamp = deps["timestamp"]
timestamp = max(os.path.getmtime(STATE["meta"]), timestamp)
sys_path = deps["sys_path"]
if sys_path != sys.path:
logger.debug('sys.path changed %s to %s', sys_path, sys.path)
return False
for path in sys.path:
here = not path
if here:
path = os.getcwd()
if not os.path.exists(path):
continue
if (not here) and (os.path.getmtime(path) > timestamp):
logger.debug('directory changed %r', path)
return False
if os.path.isdir(path):
fn = os.path.join(path, "juliapkg.json")
if os.path.exists(fn) and os.path.getmtime(fn) > timestamp:
logger.debug('file changed %r', fn)
return False
return deps
def deps_files():
ans = []
# the default deps file
ans.append(cur_deps_file())
# look in sys.path
for path in sys.path:
if not path:
path = os.getcwd()
if not os.path.isdir(path):
continue
fn = os.path.join(path, "juliapkg.json")
ans.append(fn)
for subdir in os.listdir(path):
fn = os.path.join(path, subdir, "juliapkg.json")
ans.append(fn)
return list(set(os.path.normcase(os.path.normpath(os.path.abspath(fn))) for fn in ans if os.path.isfile(fn)))
def required_packages():
# read all dependencies into a dict: name -> key -> file -> value
import json
all_deps = {}
for fn in deps_files():
with open(fn) as fp:
deps = json.load(fp)
for (name, kvs) in deps.get("packages", {}).items():
dep = all_deps.setdefault(name, {})
for (k, v) in kvs.items():
if k == 'path':
# resolve paths relative to the directory containing the file
v = os.path.normcase(os.path.normpath(os.path.join(os.path.dirname(fn), v)))
dep.setdefault(k, {})[fn] = v
# merges non-unique values
def merge_unique(dep, kfvs, k):
fvs = kfvs.pop(k, None)
if fvs is not None:
vs = set(fvs.values())
if len(vs) == 1:
dep[k], = vs
elif vs:
raise Exception("'{}' entries are not unique:\n{}".format(k, '\n'.join(['- {!r} at {}'.format(v,f) for (f,v) in fvs.items()])))
# merges compat entries
def merge_compat(dep, kfvs, k):
fvs = kfvs.pop(k, None)
if fvs is not None:
compats = list(map(Compat.parse, fvs.values()))
compat = compats[0]
for c in compats[1:]:
compat &= c
if not compat:
raise Exception("'{}' entries have empty intersection:\n{}".format(k, '\n'.join(['- {!r} at {}'.format(v,f) for (f,v) in fvs.items()])))
else:
dep[k] = str(compat)
# merges booleans with any
def merge_any(dep, kfvs, k):
fvs = kfvs.pop(k, None)
if fvs is not None:
dep[k] = any(fvs.values())
# merge dependencies: name -> key -> value
deps = []
for (name, kfvs) in all_deps.items():
kw = {'name': name}
merge_unique(kw, kfvs, 'uuid')
merge_unique(kw, kfvs, 'path')
merge_unique(kw, kfvs, 'url')
merge_unique(kw, kfvs, 'rev')
merge_compat(kw, kfvs, 'version')
merge_any(kw, kfvs, 'dev')
deps.append(PkgSpec(**kw))
return deps
def required_julia():
import json
compats = {}
for fn in deps_files():
with open(fn) as fp:
deps = json.load(fp)
c = deps.get("julia")
if c is not None:
compats[fn] = Compat.parse(c)
compat = None
for c in compats.values():
if compat is None:
compat = c
else:
compat &= c
if compat is not None and not compat:
raise Exception("'julia' compat entries have empty intersection:\n{}".format('\n'.join(['- {!r} at {}'.format(v,f) for (f,v) in compats.items()])))
return compat
def resolve(force=False, dry_run=False):
# see if we can skip resolving
if not force:
if STATE['resolved']:
return True
deps = can_skip_resolve()
if deps:
STATE['resolved'] = True
STATE['executable'] = deps['executable']
STATE['version'] = Version(deps['version'])
return True
if dry_run:
return False
STATE['resolved'] = False
# get julia compat
compat = required_julia()
# get required packages
pkgs = required_packages()
# find a compatible julia executable
log(f'Locating Julia{"" if compat is None else " "+str(compat)}')
exe, ver = find_julia(compat=compat, prefix=STATE['install'], install=True, upgrade=True)
log(f'Using Julia {ver} at {exe}')
# set up the project
project = STATE['project']
log(f'Using Julia project at {project}')
os.makedirs(project, exist_ok=True)
# write a Project.toml specifying UUIDs and compatibility of required packages
with open(os.path.join(project, "Project.toml"), "wt") as fp:
print('[deps]', file=fp)
for pkg in pkgs:
print(f'{pkg.name} = "{pkg.uuid}"', file=fp)
print(file=fp)
print('[compat]', file=fp)
for pkg in pkgs:
if pkg.version:
print(f'{pkg.name} = "{pkg.version}"', file=fp)
print(file=fp)
if not STATE['offline']:
# install the packages
dev_pkgs = ', '.join([pkg.jlstr() for pkg in pkgs if pkg.dev])
add_pkgs = ', '.join([pkg.jlstr() for pkg in pkgs if not pkg.dev])
script = ['import Pkg']
if dev_pkgs:
script.append(f'Pkg.develop([{dev_pkgs}])')
if add_pkgs:
script.append(f'Pkg.add([{add_pkgs}])')
script.append('Pkg.resolve()')
log(f'Installing packages:')
for line in script:
log('julia>', line, cont=True)
run([exe, '--project='+project, '--startup-file=no', '-e', '; '.join(script)], check=True)
# record that we resolved
save_meta({
"meta_version": META_VERSION,
"dev": STATE["dev"],
"version": str(ver),
"executable": exe,
"timestamp": time.time(),
"sys_path": sys.path,
"pkgs": [pkg.dict() for pkg in pkgs],
"offline": bool(STATE['offline']),
})
STATE['resolved'] = True
STATE['executable'] = exe
STATE['version'] = ver
return True
def executable():
resolve()
return STATE['executable']
def project():
resolve()
return STATE['project']
def cur_deps_file(target=None):
if target is None:
return STATE['deps']
elif os.path.isdir(target):
return os.path.abspath(os.path.join(target, 'juliapkg.json'))
elif os.path.isfile(target) or (os.path.isdir(os.path.dirname(target)) and not os.path.exists(target)):
return os.path.abspath(target)
else:
raise ValueError('target must be an existing directory, or a file name in an existing directory')
def load_cur_deps(target=None):
fn = cur_deps_file(target=target)
if os.path.exists(fn):
with open(fn) as fp:
deps = json.load(fp)
else:
deps = {}
return deps
def write_cur_deps(deps, target=None):
fn = cur_deps_file(target=target)
if deps:
os.makedirs(os.path.dirname(fn), exist_ok=True)
with open(fn, 'w') as fp:
json.dump(deps, fp)
else:
if os.path.exists(fn):
os.remove(fn)
def status(target=None):
res = resolve(dry_run=True)
print('JuliaPkg Status')
fn = cur_deps_file(target=target)
if os.path.exists(fn):
with open(fn) as fp:
deps = json.load(fp)
else:
deps = {}
st = '' if deps else ' (empty project)'
print(f'{fn}{st}')
if res:
exe = STATE['executable']
ver = STATE['version']
else:
print('Not resolved (resolve for more information)')
jl = deps.get('julia')
if res or jl:
print('Julia', end='')
if res:
print(f' {ver}', end='')
if jl:
print(f' ({jl})', end='')
if res:
print(f' @ {exe}', end='')
print()
pkgs = deps.get('packages')
if pkgs:
print(f'Packages:')
for (name, info) in pkgs.items():
print(f' {name}: {info}')
def require_julia(compat, target=None):
deps = load_cur_deps(target=target)
if compat is None:
if 'julia' in deps:
del deps['julia']
else:
if isinstance(compat, str):
compat = Compat.parse(compat)
elif not isinstance(compat, Compat):
raise TypeError
deps['julia'] = str(compat)
write_cur_deps(deps, target=target)
STATE['resolved'] = False
def add(pkg, *args, target=None, **kwargs):
deps = load_cur_deps(target=target)
_add(deps, pkg, *args, **kwargs)
write_cur_deps(deps, target=target)
STATE['resolved'] = False
def _add(deps, pkg, uuid=None, **kwargs):
if isinstance(pkg, PkgSpec):
pkgs = deps.setdefault('packages', {})
pkgs[pkg.name] = pkg.depsdict()
elif isinstance(pkg, str):
if uuid is None:
raise TypeError('uuid is required')
pkg = PkgSpec(pkg, uuid, **kwargs)
_add(deps, pkg)
else:
for p in pkg:
_add(deps, p)
def rm(pkg, target=None):
deps = load_cur_deps(target=target)
_rm(deps, pkg)
write_cur_deps(deps, target=target)
STATE['resolved'] = False
def _rm(deps, pkg):
if isinstance(pkg, PkgSpec):
_rm(deps, pkg.name)
elif isinstance(pkg, str):
pkgs = deps.setdefault('packages', {})
if pkg in pkgs:
del pkgs[pkg]
if not pkgs:
del deps['packages']
else:
for p in pkg:
_rm(deps, p)
def offline(value=True):
if value is not None:
STATE['offline'] = value
if value:
STATE['resolved'] = False
return STATE['offline']