From 6ca69f66ba70c829956746cf290e39b16a950731 Mon Sep 17 00:00:00 2001 From: Enrico Scholz Date: Thu, 19 May 2022 12:05:55 +0200 Subject: lib:npm_registry: initial checkin Helper module to: - generate meta information from package.json content. This data has a format as provided by https://registry.npmjs.org - put this meta information and the corresponding tarball in the nodejs cache. This uses an external, nodejs version specific helper script (oe-npm-cache) shipped in oe-meta To avoid further nodejs version dependencies, future versions of this module might omit the caching completely and serve meta information and tarball by an http server. (From OE-Core rev: 6cd5886ad05fee704e8a5892bd370c360c8c3b54) Signed-off-by: Enrico Scholz Signed-off-by: Richard Purdie --- meta/lib/oe/npm_registry.py | 169 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 169 insertions(+) create mode 100644 meta/lib/oe/npm_registry.py (limited to 'meta') diff --git a/meta/lib/oe/npm_registry.py b/meta/lib/oe/npm_registry.py new file mode 100644 index 0000000000..96c0affb45 --- /dev/null +++ b/meta/lib/oe/npm_registry.py @@ -0,0 +1,169 @@ +import bb +import json +import subprocess + +_ALWAYS_SAFE = frozenset('ABCDEFGHIJKLMNOPQRSTUVWXYZ' + 'abcdefghijklmnopqrstuvwxyz' + '0123456789' + '_.-~') + +MISSING_OK = object() + +REGISTRY = "https://registry.npmjs.org" + +# we can not use urllib.parse here because npm expects lowercase +# hex-chars but urllib generates uppercase ones +def uri_quote(s, safe = '/'): + res = "" + safe_set = set(safe) + for c in s: + if c in _ALWAYS_SAFE or c in safe_set: + res += c + else: + res += '%%%02x' % ord(c) + return res + +class PackageJson: + def __init__(self, spec): + self.__spec = spec + + @property + def name(self): + return self.__spec['name'] + + @property + def version(self): + return self.__spec['version'] + + @property + def empty_manifest(self): + return { + 'name': self.name, + 'description': self.__spec.get('description', ''), + 'versions': {}, + } + + def base_filename(self): + return uri_quote(self.name, safe = '@') + + def as_manifest_entry(self, tarball_uri): + res = {} + + ## NOTE: 'npm install' requires more than basic meta information; + ## e.g. it takes 'bin' from this manifest entry but not the actual + ## 'package.json' + for (idx,dflt) in [('name', None), + ('description', ""), + ('version', None), + ('bin', MISSING_OK), + ('man', MISSING_OK), + ('scripts', MISSING_OK), + ('directories', MISSING_OK), + ('dependencies', MISSING_OK), + ('devDependencies', MISSING_OK), + ('optionalDependencies', MISSING_OK), + ('license', "unknown")]: + if idx in self.__spec: + res[idx] = self.__spec[idx] + elif dflt == MISSING_OK: + pass + elif dflt != None: + res[idx] = dflt + else: + raise Exception("%s-%s: missing key %s" % (self.name, + self.version, + idx)) + + res['dist'] = { + 'tarball': tarball_uri, + } + + return res + +class ManifestImpl: + def __init__(self, base_fname, spec): + self.__base = base_fname + self.__spec = spec + + def load(self): + try: + with open(self.filename, "r") as f: + res = json.load(f) + except IOError: + res = self.__spec.empty_manifest + + return res + + def save(self, meta): + with open(self.filename, "w") as f: + json.dump(meta, f, indent = 2) + + @property + def filename(self): + return self.__base + ".meta" + +class Manifest: + def __init__(self, base_fname, spec): + self.__base = base_fname + self.__spec = spec + self.__lockf = None + self.__impl = None + + def __enter__(self): + self.__lockf = bb.utils.lockfile(self.__base + ".lock") + self.__impl = ManifestImpl(self.__base, self.__spec) + return self.__impl + + def __exit__(self, exc_type, exc_val, exc_tb): + bb.utils.unlockfile(self.__lockf) + +class NpmCache: + def __init__(self, cache): + self.__cache = cache + + @property + def path(self): + return self.__cache + + def run(self, type, key, fname): + subprocess.run(['oe-npm-cache', self.__cache, type, key, fname], + check = True) + +class NpmRegistry: + def __init__(self, path, cache): + self.__path = path + self.__cache = NpmCache(cache + '/_cacache') + bb.utils.mkdirhier(self.__path) + bb.utils.mkdirhier(self.__cache.path) + + @staticmethod + ## This function is critical and must match nodejs expectations + def _meta_uri(spec): + return REGISTRY + '/' + uri_quote(spec.name, safe = '@') + + @staticmethod + ## Exact return value does not matter; just make it look like a + ## usual registry url + def _tarball_uri(spec): + return '%s/%s/-/%s-%s.tgz' % (REGISTRY, + uri_quote(spec.name, safe = '@'), + uri_quote(spec.name, safe = '@/'), + spec.version) + + def add_pkg(self, tarball, pkg_json): + pkg_json = PackageJson(pkg_json) + base = os.path.join(self.__path, pkg_json.base_filename()) + + with Manifest(base, pkg_json) as manifest: + meta = manifest.load() + tarball_uri = self._tarball_uri(pkg_json) + + meta['versions'][pkg_json.version] = pkg_json.as_manifest_entry(tarball_uri) + + manifest.save(meta) + + ## Cache entries are a little bit dependent on the nodejs + ## version; version specific cache implementation must + ## mitigate differences + self.__cache.run('meta', self._meta_uri(pkg_json), manifest.filename); + self.__cache.run('tgz', tarball_uri, tarball); -- cgit v1.2.3-54-g00ecf