| #!/usr/bin/env python |
| |
| # Copyright (C) 2014 The Android Open Source Project |
| # |
| # Licensed under the Apache License, Version 2.0 (the 'License'); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an 'AS IS' BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| """ |
| Enforces common Android public API design patterns. It ignores lint messages from |
| a previous API level, if provided. |
| |
| Usage: apilint.py current.txt |
| Usage: apilint.py current.txt previous.txt |
| |
| You can also splice in blame details like this: |
| $ git blame api/current.txt -t -e > /tmp/currentblame.txt |
| $ apilint.py /tmp/currentblame.txt previous.txt --no-color |
| """ |
| |
| import re, sys, collections, traceback, argparse |
| |
| |
| BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8) |
| |
| ALLOW_GOOGLE = False |
| USE_COLOR = True |
| |
| def format(fg=None, bg=None, bright=False, bold=False, dim=False, reset=False): |
| # manually derived from http://en.wikipedia.org/wiki/ANSI_escape_code#Codes |
| if not USE_COLOR: return "" |
| codes = [] |
| if reset: codes.append("0") |
| else: |
| if not fg is None: codes.append("3%d" % (fg)) |
| if not bg is None: |
| if not bright: codes.append("4%d" % (bg)) |
| else: codes.append("10%d" % (bg)) |
| if bold: codes.append("1") |
| elif dim: codes.append("2") |
| else: codes.append("22") |
| return "\033[%sm" % (";".join(codes)) |
| |
| |
| class Field(): |
| def __init__(self, clazz, line, raw, blame): |
| self.clazz = clazz |
| self.line = line |
| self.raw = raw.strip(" {;") |
| self.blame = blame |
| |
| raw = raw.split() |
| self.split = list(raw) |
| |
| for r in ["field", "volatile", "transient", "public", "protected", "static", "final", "deprecated"]: |
| while r in raw: raw.remove(r) |
| |
| self.typ = raw[0] |
| self.name = raw[1].strip(";") |
| if len(raw) >= 4 and raw[2] == "=": |
| self.value = raw[3].strip(';"') |
| else: |
| self.value = None |
| |
| self.ident = self.raw.replace(" deprecated ", " ") |
| |
| def __repr__(self): |
| return self.raw |
| |
| |
| class Method(): |
| def __init__(self, clazz, line, raw, blame): |
| self.clazz = clazz |
| self.line = line |
| self.raw = raw.strip(" {;") |
| self.blame = blame |
| |
| # drop generics for now |
| raw = re.sub("<.+?>", "", raw) |
| |
| raw = re.split("[\s(),;]+", raw) |
| for r in ["", ";"]: |
| while r in raw: raw.remove(r) |
| self.split = list(raw) |
| |
| for r in ["method", "public", "protected", "static", "final", "deprecated", "abstract"]: |
| while r in raw: raw.remove(r) |
| |
| self.typ = raw[0] |
| self.name = raw[1] |
| self.args = [] |
| for r in raw[2:]: |
| if r == "throws": break |
| self.args.append(r) |
| |
| # identity for compat purposes |
| ident = self.raw |
| ident = ident.replace(" deprecated ", " ") |
| ident = ident.replace(" synchronized ", " ") |
| ident = re.sub("<.+?>", "", ident) |
| if " throws " in ident: |
| ident = ident[:ident.index(" throws ")] |
| self.ident = ident |
| |
| def __repr__(self): |
| return self.raw |
| |
| |
| class Class(): |
| def __init__(self, pkg, line, raw, blame): |
| self.pkg = pkg |
| self.line = line |
| self.raw = raw.strip(" {;") |
| self.blame = blame |
| self.ctors = [] |
| self.fields = [] |
| self.methods = [] |
| |
| raw = raw.split() |
| self.split = list(raw) |
| if "class" in raw: |
| self.fullname = raw[raw.index("class")+1] |
| elif "interface" in raw: |
| self.fullname = raw[raw.index("interface")+1] |
| else: |
| raise ValueError("Funky class type %s" % (self.raw)) |
| |
| if "extends" in raw: |
| self.extends = raw[raw.index("extends")+1] |
| self.extends_path = self.extends.split(".") |
| else: |
| self.extends = None |
| self.extends_path = [] |
| |
| self.fullname = self.pkg.name + "." + self.fullname |
| self.fullname_path = self.fullname.split(".") |
| |
| self.name = self.fullname[self.fullname.rindex(".")+1:] |
| |
| def __repr__(self): |
| return self.raw |
| |
| |
| class Package(): |
| def __init__(self, line, raw, blame): |
| self.line = line |
| self.raw = raw.strip(" {;") |
| self.blame = blame |
| |
| raw = raw.split() |
| self.name = raw[raw.index("package")+1] |
| self.name_path = self.name.split(".") |
| |
| def __repr__(self): |
| return self.raw |
| |
| |
| def _parse_stream(f, clazz_cb=None): |
| line = 0 |
| api = {} |
| pkg = None |
| clazz = None |
| blame = None |
| |
| re_blame = re.compile("^([a-z0-9]{7,}) \(<([^>]+)>.+?\) (.+?)$") |
| for raw in f: |
| line += 1 |
| raw = raw.rstrip() |
| match = re_blame.match(raw) |
| if match is not None: |
| blame = match.groups()[0:2] |
| raw = match.groups()[2] |
| else: |
| blame = None |
| |
| if raw.startswith("package"): |
| pkg = Package(line, raw, blame) |
| elif raw.startswith(" ") and raw.endswith("{"): |
| # When provided with class callback, we treat as incremental |
| # parse and don't build up entire API |
| if clazz and clazz_cb: |
| clazz_cb(clazz) |
| clazz = Class(pkg, line, raw, blame) |
| if not clazz_cb: |
| api[clazz.fullname] = clazz |
| elif raw.startswith(" ctor"): |
| clazz.ctors.append(Method(clazz, line, raw, blame)) |
| elif raw.startswith(" method"): |
| clazz.methods.append(Method(clazz, line, raw, blame)) |
| elif raw.startswith(" field"): |
| clazz.fields.append(Field(clazz, line, raw, blame)) |
| |
| # Handle last trailing class |
| if clazz and clazz_cb: |
| clazz_cb(clazz) |
| |
| return api |
| |
| |
| class Failure(): |
| def __init__(self, sig, clazz, detail, error, rule, msg): |
| self.sig = sig |
| self.error = error |
| self.rule = rule |
| self.msg = msg |
| |
| if error: |
| self.head = "Error %s" % (rule) if rule else "Error" |
| dump = "%s%s:%s %s" % (format(fg=RED, bg=BLACK, bold=True), self.head, format(reset=True), msg) |
| else: |
| self.head = "Warning %s" % (rule) if rule else "Warning" |
| dump = "%s%s:%s %s" % (format(fg=YELLOW, bg=BLACK, bold=True), self.head, format(reset=True), msg) |
| |
| self.line = clazz.line |
| blame = clazz.blame |
| if detail is not None: |
| dump += "\n in " + repr(detail) |
| self.line = detail.line |
| blame = detail.blame |
| dump += "\n in " + repr(clazz) |
| dump += "\n in " + repr(clazz.pkg) |
| dump += "\n at line " + repr(self.line) |
| if blame is not None: |
| dump += "\n last modified by %s in %s" % (blame[1], blame[0]) |
| |
| self.dump = dump |
| |
| def __repr__(self): |
| return self.dump |
| |
| |
| failures = {} |
| |
| def _fail(clazz, detail, error, rule, msg): |
| """Records an API failure to be processed later.""" |
| global failures |
| |
| sig = "%s-%s-%s" % (clazz.fullname, repr(detail), msg) |
| sig = sig.replace(" deprecated ", " ") |
| |
| failures[sig] = Failure(sig, clazz, detail, error, rule, msg) |
| |
| |
| def warn(clazz, detail, rule, msg): |
| _fail(clazz, detail, False, rule, msg) |
| |
| def error(clazz, detail, rule, msg): |
| _fail(clazz, detail, True, rule, msg) |
| |
| |
| def verify_constants(clazz): |
| """All static final constants must be FOO_NAME style.""" |
| if re.match("android\.R\.[a-z]+", clazz.fullname): return |
| |
| for f in clazz.fields: |
| if "static" in f.split and "final" in f.split: |
| if re.match("[A-Z0-9_]+", f.name) is None: |
| error(clazz, f, "C2", "Constant field names must be FOO_NAME") |
| elif f.typ != "java.lang.String": |
| if f.name.startswith("MIN_") or f.name.startswith("MAX_"): |
| warn(clazz, f, "C8", "If min/max could change in future, make them dynamic methods") |
| |
| |
| def verify_enums(clazz): |
| """Enums are bad, mmkay?""" |
| if "extends java.lang.Enum" in clazz.raw: |
| error(clazz, None, "F5", "Enums are not allowed") |
| |
| |
| def verify_class_names(clazz): |
| """Try catching malformed class names like myMtp or MTPUser.""" |
| if clazz.fullname.startswith("android.opengl"): return |
| if clazz.fullname.startswith("android.renderscript"): return |
| if re.match("android\.R\.[a-z]+", clazz.fullname): return |
| |
| if re.search("[A-Z]{2,}", clazz.name) is not None: |
| warn(clazz, None, "S1", "Class names with acronyms should be Mtp not MTP") |
| if re.match("[^A-Z]", clazz.name): |
| error(clazz, None, "S1", "Class must start with uppercase char") |
| |
| |
| def verify_method_names(clazz): |
| """Try catching malformed method names, like Foo() or getMTU().""" |
| if clazz.fullname.startswith("android.opengl"): return |
| if clazz.fullname.startswith("android.renderscript"): return |
| if clazz.fullname == "android.system.OsConstants": return |
| |
| for m in clazz.methods: |
| if re.search("[A-Z]{2,}", m.name) is not None: |
| warn(clazz, m, "S1", "Method names with acronyms should be getMtu() instead of getMTU()") |
| if re.match("[^a-z]", m.name): |
| error(clazz, m, "S1", "Method name must start with lowercase char") |
| |
| |
| def verify_callbacks(clazz): |
| """Verify Callback classes. |
| All callback classes must be abstract. |
| All methods must follow onFoo() naming style.""" |
| if clazz.fullname == "android.speech.tts.SynthesisCallback": return |
| |
| if clazz.name.endswith("Callbacks"): |
| error(clazz, None, "L1", "Callback class names should be singular") |
| if clazz.name.endswith("Observer"): |
| warn(clazz, None, "L1", "Class should be named FooCallback") |
| |
| if clazz.name.endswith("Callback"): |
| if "interface" in clazz.split: |
| error(clazz, None, "CL3", "Callbacks must be abstract class to enable extension in future API levels") |
| |
| for m in clazz.methods: |
| if not re.match("on[A-Z][a-z]*", m.name): |
| error(clazz, m, "L1", "Callback method names must be onFoo() style") |
| |
| |
| def verify_listeners(clazz): |
| """Verify Listener classes. |
| All Listener classes must be interface. |
| All methods must follow onFoo() naming style. |
| If only a single method, it must match class name: |
| interface OnFooListener { void onFoo() }""" |
| |
| if clazz.name.endswith("Listener"): |
| if " abstract class " in clazz.raw: |
| error(clazz, None, "L1", "Listeners should be an interface, or otherwise renamed Callback") |
| |
| for m in clazz.methods: |
| if not re.match("on[A-Z][a-z]*", m.name): |
| error(clazz, m, "L1", "Listener method names must be onFoo() style") |
| |
| if len(clazz.methods) == 1 and clazz.name.startswith("On"): |
| m = clazz.methods[0] |
| if (m.name + "Listener").lower() != clazz.name.lower(): |
| error(clazz, m, "L1", "Single listener method name must match class name") |
| |
| |
| def verify_actions(clazz): |
| """Verify intent actions. |
| All action names must be named ACTION_FOO. |
| All action values must be scoped by package and match name: |
| package android.foo { |
| String ACTION_BAR = "android.foo.action.BAR"; |
| }""" |
| for f in clazz.fields: |
| if f.value is None: continue |
| if f.name.startswith("EXTRA_"): continue |
| if f.name == "SERVICE_INTERFACE" or f.name == "PROVIDER_INTERFACE": continue |
| |
| if "static" in f.split and "final" in f.split and f.typ == "java.lang.String": |
| if "_ACTION" in f.name or "ACTION_" in f.name or ".action." in f.value.lower(): |
| if not f.name.startswith("ACTION_"): |
| error(clazz, f, "C3", "Intent action constant name must be ACTION_FOO") |
| else: |
| if clazz.fullname == "android.content.Intent": |
| prefix = "android.intent.action" |
| elif clazz.fullname == "android.provider.Settings": |
| prefix = "android.settings" |
| elif clazz.fullname == "android.app.admin.DevicePolicyManager" or clazz.fullname == "android.app.admin.DeviceAdminReceiver": |
| prefix = "android.app.action" |
| else: |
| prefix = clazz.pkg.name + ".action" |
| expected = prefix + "." + f.name[7:] |
| if f.value != expected: |
| error(clazz, f, "C4", "Inconsistent action value; expected %s" % (expected)) |
| |
| |
| def verify_extras(clazz): |
| """Verify intent extras. |
| All extra names must be named EXTRA_FOO. |
| All extra values must be scoped by package and match name: |
| package android.foo { |
| String EXTRA_BAR = "android.foo.extra.BAR"; |
| }""" |
| if clazz.fullname == "android.app.Notification": return |
| if clazz.fullname == "android.appwidget.AppWidgetManager": return |
| |
| for f in clazz.fields: |
| if f.value is None: continue |
| if f.name.startswith("ACTION_"): continue |
| |
| if "static" in f.split and "final" in f.split and f.typ == "java.lang.String": |
| if "_EXTRA" in f.name or "EXTRA_" in f.name or ".extra" in f.value.lower(): |
| if not f.name.startswith("EXTRA_"): |
| error(clazz, f, "C3", "Intent extra must be EXTRA_FOO") |
| else: |
| if clazz.pkg.name == "android.content" and clazz.name == "Intent": |
| prefix = "android.intent.extra" |
| elif clazz.pkg.name == "android.app.admin": |
| prefix = "android.app.extra" |
| else: |
| prefix = clazz.pkg.name + ".extra" |
| expected = prefix + "." + f.name[6:] |
| if f.value != expected: |
| error(clazz, f, "C4", "Inconsistent extra value; expected %s" % (expected)) |
| |
| |
| def verify_equals(clazz): |
| """Verify that equals() and hashCode() must be overridden together.""" |
| methods = [ m.name for m in clazz.methods ] |
| eq = "equals" in methods |
| hc = "hashCode" in methods |
| if eq != hc: |
| error(clazz, None, "M8", "Must override both equals and hashCode; missing one") |
| |
| |
| def verify_parcelable(clazz): |
| """Verify that Parcelable objects aren't hiding required bits.""" |
| if "implements android.os.Parcelable" in clazz.raw: |
| creator = [ i for i in clazz.fields if i.name == "CREATOR" ] |
| write = [ i for i in clazz.methods if i.name == "writeToParcel" ] |
| describe = [ i for i in clazz.methods if i.name == "describeContents" ] |
| |
| if len(creator) == 0 or len(write) == 0 or len(describe) == 0: |
| error(clazz, None, "FW3", "Parcelable requires CREATOR, writeToParcel, and describeContents; missing one") |
| |
| if " final class " not in clazz.raw: |
| error(clazz, None, "FW8", "Parcelable classes must be final") |
| |
| |
| def verify_protected(clazz): |
| """Verify that no protected methods or fields are allowed.""" |
| for m in clazz.methods: |
| if "protected" in m.split: |
| error(clazz, m, "M7", "Protected methods not allowed; must be public") |
| for f in clazz.fields: |
| if "protected" in f.split: |
| error(clazz, f, "M7", "Protected fields not allowed; must be public") |
| |
| |
| def verify_fields(clazz): |
| """Verify that all exposed fields are final. |
| Exposed fields must follow myName style. |
| Catch internal mFoo objects being exposed.""" |
| |
| IGNORE_BARE_FIELDS = [ |
| "android.app.ActivityManager.RecentTaskInfo", |
| "android.app.Notification", |
| "android.content.pm.ActivityInfo", |
| "android.content.pm.ApplicationInfo", |
| "android.content.pm.FeatureGroupInfo", |
| "android.content.pm.InstrumentationInfo", |
| "android.content.pm.PackageInfo", |
| "android.content.pm.PackageItemInfo", |
| "android.os.Message", |
| "android.system.StructPollfd", |
| ] |
| |
| for f in clazz.fields: |
| if not "final" in f.split: |
| if clazz.fullname in IGNORE_BARE_FIELDS: |
| pass |
| elif clazz.fullname.endswith("LayoutParams"): |
| pass |
| elif clazz.fullname.startswith("android.util.Mutable"): |
| pass |
| else: |
| error(clazz, f, "F2", "Bare fields must be marked final, or add accessors if mutable") |
| |
| if not "static" in f.split: |
| if not re.match("[a-z]([a-zA-Z]+)?", f.name): |
| error(clazz, f, "S1", "Non-static fields must be named using myField style") |
| |
| if re.match("[ms][A-Z]", f.name): |
| error(clazz, f, "F1", "Internal objects must not be exposed") |
| |
| if re.match("[A-Z_]+", f.name): |
| if "static" not in f.split or "final" not in f.split: |
| error(clazz, f, "C2", "Constants must be marked static final") |
| |
| |
| def verify_register(clazz): |
| """Verify parity of registration methods. |
| Callback objects use register/unregister methods. |
| Listener objects use add/remove methods.""" |
| methods = [ m.name for m in clazz.methods ] |
| for m in clazz.methods: |
| if "Callback" in m.raw: |
| if m.name.startswith("register"): |
| other = "unregister" + m.name[8:] |
| if other not in methods: |
| error(clazz, m, "L2", "Missing unregister method") |
| if m.name.startswith("unregister"): |
| other = "register" + m.name[10:] |
| if other not in methods: |
| error(clazz, m, "L2", "Missing register method") |
| |
| if m.name.startswith("add") or m.name.startswith("remove"): |
| error(clazz, m, "L3", "Callback methods should be named register/unregister") |
| |
| if "Listener" in m.raw: |
| if m.name.startswith("add"): |
| other = "remove" + m.name[3:] |
| if other not in methods: |
| error(clazz, m, "L2", "Missing remove method") |
| if m.name.startswith("remove") and not m.name.startswith("removeAll"): |
| other = "add" + m.name[6:] |
| if other not in methods: |
| error(clazz, m, "L2", "Missing add method") |
| |
| if m.name.startswith("register") or m.name.startswith("unregister"): |
| error(clazz, m, "L3", "Listener methods should be named add/remove") |
| |
| |
| def verify_sync(clazz): |
| """Verify synchronized methods aren't exposed.""" |
| for m in clazz.methods: |
| if "synchronized" in m.split: |
| error(clazz, m, "M5", "Internal locks must not be exposed") |
| |
| |
| def verify_intent_builder(clazz): |
| """Verify that Intent builders are createFooIntent() style.""" |
| if clazz.name == "Intent": return |
| |
| for m in clazz.methods: |
| if m.typ == "android.content.Intent": |
| if m.name.startswith("create") and m.name.endswith("Intent"): |
| pass |
| else: |
| warn(clazz, m, "FW1", "Methods creating an Intent should be named createFooIntent()") |
| |
| |
| def verify_helper_classes(clazz): |
| """Verify that helper classes are named consistently with what they extend. |
| All developer extendable methods should be named onFoo().""" |
| test_methods = False |
| if "extends android.app.Service" in clazz.raw: |
| test_methods = True |
| if not clazz.name.endswith("Service"): |
| error(clazz, None, "CL4", "Inconsistent class name; should be FooService") |
| |
| found = False |
| for f in clazz.fields: |
| if f.name == "SERVICE_INTERFACE": |
| found = True |
| if f.value != clazz.fullname: |
| error(clazz, f, "C4", "Inconsistent interface constant; expected %s" % (clazz.fullname)) |
| |
| if "extends android.content.ContentProvider" in clazz.raw: |
| test_methods = True |
| if not clazz.name.endswith("Provider"): |
| error(clazz, None, "CL4", "Inconsistent class name; should be FooProvider") |
| |
| found = False |
| for f in clazz.fields: |
| if f.name == "PROVIDER_INTERFACE": |
| found = True |
| if f.value != clazz.fullname: |
| error(clazz, f, "C4", "Inconsistent interface constant; expected %s" % (clazz.fullname)) |
| |
| if "extends android.content.BroadcastReceiver" in clazz.raw: |
| test_methods = True |
| if not clazz.name.endswith("Receiver"): |
| error(clazz, None, "CL4", "Inconsistent class name; should be FooReceiver") |
| |
| if "extends android.app.Activity" in clazz.raw: |
| test_methods = True |
| if not clazz.name.endswith("Activity"): |
| error(clazz, None, "CL4", "Inconsistent class name; should be FooActivity") |
| |
| if test_methods: |
| for m in clazz.methods: |
| if "final" in m.split: continue |
| if not re.match("on[A-Z]", m.name): |
| if "abstract" in m.split: |
| warn(clazz, m, None, "Methods implemented by developers should be named onFoo()") |
| else: |
| warn(clazz, m, None, "If implemented by developer, should be named onFoo(); otherwise consider marking final") |
| |
| |
| def verify_builder(clazz): |
| """Verify builder classes. |
| Methods should return the builder to enable chaining.""" |
| if " extends " in clazz.raw: return |
| if not clazz.name.endswith("Builder"): return |
| |
| if clazz.name != "Builder": |
| warn(clazz, None, None, "Builder should be defined as inner class") |
| |
| has_build = False |
| for m in clazz.methods: |
| if m.name == "build": |
| has_build = True |
| continue |
| |
| if m.name.startswith("get"): continue |
| if m.name.startswith("clear"): continue |
| |
| if m.name.startswith("with"): |
| warn(clazz, m, None, "Builder methods names should use setFoo() style") |
| |
| if m.name.startswith("set"): |
| if not m.typ.endswith(clazz.fullname): |
| warn(clazz, m, "M4", "Methods must return the builder object") |
| |
| if not has_build: |
| warn(clazz, None, None, "Missing build() method") |
| |
| |
| def verify_aidl(clazz): |
| """Catch people exposing raw AIDL.""" |
| if "extends android.os.Binder" in clazz.raw or "implements android.os.IInterface" in clazz.raw: |
| error(clazz, None, None, "Raw AIDL interfaces must not be exposed") |
| |
| |
| def verify_internal(clazz): |
| """Catch people exposing internal classes.""" |
| if clazz.pkg.name.startswith("com.android"): |
| error(clazz, None, None, "Internal classes must not be exposed") |
| |
| |
| def verify_layering(clazz): |
| """Catch package layering violations. |
| For example, something in android.os depending on android.app.""" |
| ranking = [ |
| ["android.service","android.accessibilityservice","android.inputmethodservice","android.printservice","android.appwidget","android.webkit","android.preference","android.gesture","android.print"], |
| "android.app", |
| "android.widget", |
| "android.view", |
| "android.animation", |
| "android.provider", |
| ["android.content","android.graphics.drawable"], |
| "android.database", |
| "android.graphics", |
| "android.text", |
| "android.os", |
| "android.util" |
| ] |
| |
| def rank(p): |
| for i in range(len(ranking)): |
| if isinstance(ranking[i], list): |
| for j in ranking[i]: |
| if p.startswith(j): return i |
| else: |
| if p.startswith(ranking[i]): return i |
| |
| cr = rank(clazz.pkg.name) |
| if cr is None: return |
| |
| for f in clazz.fields: |
| ir = rank(f.typ) |
| if ir and ir < cr: |
| warn(clazz, f, "FW6", "Field type violates package layering") |
| |
| for m in clazz.methods: |
| ir = rank(m.typ) |
| if ir and ir < cr: |
| warn(clazz, m, "FW6", "Method return type violates package layering") |
| for arg in m.args: |
| ir = rank(arg) |
| if ir and ir < cr: |
| warn(clazz, m, "FW6", "Method argument type violates package layering") |
| |
| |
| def verify_boolean(clazz): |
| """Verifies that boolean accessors are named correctly. |
| For example, hasFoo() and setHasFoo().""" |
| |
| def is_get(m): return len(m.args) == 0 and m.typ == "boolean" |
| def is_set(m): return len(m.args) == 1 and m.args[0] == "boolean" |
| |
| gets = [ m for m in clazz.methods if is_get(m) ] |
| sets = [ m for m in clazz.methods if is_set(m) ] |
| |
| def error_if_exists(methods, trigger, expected, actual): |
| for m in methods: |
| if m.name == actual: |
| error(clazz, m, "M6", "Symmetric method for %s must be named %s" % (trigger, expected)) |
| |
| for m in clazz.methods: |
| if is_get(m): |
| if re.match("is[A-Z]", m.name): |
| target = m.name[2:] |
| expected = "setIs" + target |
| error_if_exists(sets, m.name, expected, "setHas" + target) |
| elif re.match("has[A-Z]", m.name): |
| target = m.name[3:] |
| expected = "setHas" + target |
| error_if_exists(sets, m.name, expected, "setIs" + target) |
| error_if_exists(sets, m.name, expected, "set" + target) |
| elif re.match("get[A-Z]", m.name): |
| target = m.name[3:] |
| expected = "set" + target |
| error_if_exists(sets, m.name, expected, "setIs" + target) |
| error_if_exists(sets, m.name, expected, "setHas" + target) |
| |
| if is_set(m): |
| if re.match("set[A-Z]", m.name): |
| target = m.name[3:] |
| expected = "get" + target |
| error_if_exists(sets, m.name, expected, "is" + target) |
| error_if_exists(sets, m.name, expected, "has" + target) |
| |
| |
| def verify_collections(clazz): |
| """Verifies that collection types are interfaces.""" |
| if clazz.fullname == "android.os.Bundle": return |
| |
| bad = ["java.util.Vector", "java.util.LinkedList", "java.util.ArrayList", "java.util.Stack", |
| "java.util.HashMap", "java.util.HashSet", "android.util.ArraySet", "android.util.ArrayMap"] |
| for m in clazz.methods: |
| if m.typ in bad: |
| error(clazz, m, "CL2", "Return type is concrete collection; must be higher-level interface") |
| for arg in m.args: |
| if arg in bad: |
| error(clazz, m, "CL2", "Argument is concrete collection; must be higher-level interface") |
| |
| |
| def verify_flags(clazz): |
| """Verifies that flags are non-overlapping.""" |
| known = collections.defaultdict(int) |
| for f in clazz.fields: |
| if "FLAG_" in f.name: |
| try: |
| val = int(f.value) |
| except: |
| continue |
| |
| scope = f.name[0:f.name.index("FLAG_")] |
| if val & known[scope]: |
| warn(clazz, f, "C1", "Found overlapping flag constant value") |
| known[scope] |= val |
| |
| |
| def verify_exception(clazz): |
| """Verifies that methods don't throw generic exceptions.""" |
| for m in clazz.methods: |
| if "throws java.lang.Exception" in m.raw or "throws java.lang.Throwable" in m.raw or "throws java.lang.Error" in m.raw: |
| error(clazz, m, "S1", "Methods must not throw generic exceptions") |
| |
| if "throws android.os.RemoteException" in m.raw: |
| if clazz.name == "android.content.ContentProviderClient": continue |
| if clazz.name == "android.os.Binder": continue |
| if clazz.name == "android.os.IBinder": continue |
| |
| error(clazz, m, "FW9", "Methods calling into system server should rethrow RemoteException as RuntimeException") |
| |
| |
| def verify_google(clazz): |
| """Verifies that APIs never reference Google.""" |
| |
| if re.search("google", clazz.raw, re.IGNORECASE): |
| error(clazz, None, None, "Must never reference Google") |
| |
| test = [] |
| test.extend(clazz.ctors) |
| test.extend(clazz.fields) |
| test.extend(clazz.methods) |
| |
| for t in test: |
| if re.search("google", t.raw, re.IGNORECASE): |
| error(clazz, t, None, "Must never reference Google") |
| |
| |
| def verify_bitset(clazz): |
| """Verifies that we avoid using heavy BitSet.""" |
| |
| for f in clazz.fields: |
| if f.typ == "java.util.BitSet": |
| error(clazz, f, None, "Field type must not be heavy BitSet") |
| |
| for m in clazz.methods: |
| if m.typ == "java.util.BitSet": |
| error(clazz, m, None, "Return type must not be heavy BitSet") |
| for arg in m.args: |
| if arg == "java.util.BitSet": |
| error(clazz, m, None, "Argument type must not be heavy BitSet") |
| |
| |
| def verify_manager(clazz): |
| """Verifies that FooManager is only obtained from Context.""" |
| |
| if not clazz.name.endswith("Manager"): return |
| |
| for c in clazz.ctors: |
| error(clazz, c, None, "Managers must always be obtained from Context; no direct constructors") |
| |
| |
| def verify_boxed(clazz): |
| """Verifies that methods avoid boxed primitives.""" |
| |
| boxed = ["java.lang.Number","java.lang.Byte","java.lang.Double","java.lang.Float","java.lang.Integer","java.lang.Long","java.lang.Short"] |
| |
| for c in clazz.ctors: |
| for arg in c.args: |
| if arg in boxed: |
| error(clazz, c, "M11", "Must avoid boxed primitives") |
| |
| for f in clazz.fields: |
| if f.typ in boxed: |
| error(clazz, f, "M11", "Must avoid boxed primitives") |
| |
| for m in clazz.methods: |
| if m.typ in boxed: |
| error(clazz, m, "M11", "Must avoid boxed primitives") |
| for arg in m.args: |
| if arg in boxed: |
| error(clazz, m, "M11", "Must avoid boxed primitives") |
| |
| |
| def verify_static_utils(clazz): |
| """Verifies that helper classes can't be constructed.""" |
| if clazz.fullname.startswith("android.opengl"): return |
| if re.match("android\.R\.[a-z]+", clazz.fullname): return |
| |
| if len(clazz.fields) > 0: return |
| if len(clazz.methods) == 0: return |
| |
| for m in clazz.methods: |
| if "static" not in m.split: |
| return |
| |
| # At this point, we have no fields, and all methods are static |
| if len(clazz.ctors) > 0: |
| error(clazz, None, None, "Fully-static utility classes must not have constructor") |
| |
| |
| def verify_overload_args(clazz): |
| """Verifies that method overloads add new arguments at the end.""" |
| if clazz.fullname.startswith("android.opengl"): return |
| |
| overloads = collections.defaultdict(list) |
| for m in clazz.methods: |
| if "deprecated" in m.split: continue |
| overloads[m.name].append(m) |
| |
| for name, methods in overloads.items(): |
| if len(methods) <= 1: continue |
| |
| # Look for arguments common across all overloads |
| def cluster(args): |
| count = collections.defaultdict(int) |
| res = set() |
| for i in range(len(args)): |
| a = args[i] |
| res.add("%s#%d" % (a, count[a])) |
| count[a] += 1 |
| return res |
| |
| common_args = cluster(methods[0].args) |
| for m in methods: |
| common_args = common_args & cluster(m.args) |
| |
| if len(common_args) == 0: continue |
| |
| # Require that all common arguments are present at start of signature |
| locked_sig = None |
| for m in methods: |
| sig = m.args[0:len(common_args)] |
| if not common_args.issubset(cluster(sig)): |
| warn(clazz, m, "M2", "Expected common arguments [%s] at beginning of overloaded method" % (", ".join(common_args))) |
| elif not locked_sig: |
| locked_sig = sig |
| elif locked_sig != sig: |
| error(clazz, m, "M2", "Expected consistent argument ordering between overloads: %s..." % (", ".join(locked_sig))) |
| |
| |
| def verify_callback_handlers(clazz): |
| """Verifies that methods adding listener/callback have overload |
| for specifying delivery thread.""" |
| |
| # Ignore UI packages which assume main thread |
| skip = [ |
| "animation", |
| "view", |
| "graphics", |
| "transition", |
| "widget", |
| "webkit", |
| ] |
| for s in skip: |
| if s in clazz.pkg.name_path: return |
| if s in clazz.extends_path: return |
| |
| # Ignore UI classes which assume main thread |
| if "app" in clazz.pkg.name_path or "app" in clazz.extends_path: |
| for s in ["ActionBar","Dialog","Application","Activity","Fragment","Loader"]: |
| if s in clazz.fullname: return |
| if "content" in clazz.pkg.name_path or "content" in clazz.extends_path: |
| for s in ["Loader"]: |
| if s in clazz.fullname: return |
| |
| found = {} |
| by_name = collections.defaultdict(list) |
| for m in clazz.methods: |
| if m.name.startswith("unregister"): continue |
| if m.name.startswith("remove"): continue |
| if re.match("on[A-Z]+", m.name): continue |
| |
| by_name[m.name].append(m) |
| |
| for a in m.args: |
| if a.endswith("Listener") or a.endswith("Callback") or a.endswith("Callbacks"): |
| found[m.name] = m |
| |
| for f in found.values(): |
| takes_handler = False |
| for m in by_name[f.name]: |
| if "android.os.Handler" in m.args: |
| takes_handler = True |
| if not takes_handler: |
| warn(clazz, f, "L1", "Registration methods should have overload that accepts delivery Handler") |
| |
| |
| def verify_context_first(clazz): |
| """Verifies that methods accepting a Context keep it the first argument.""" |
| examine = clazz.ctors + clazz.methods |
| for m in examine: |
| if len(m.args) > 1 and m.args[0] != "android.content.Context": |
| if "android.content.Context" in m.args[1:]: |
| error(clazz, m, "M3", "Context is distinct, so it must be the first argument") |
| |
| |
| def verify_listener_last(clazz): |
| """Verifies that methods accepting a Listener or Callback keep them as last arguments.""" |
| examine = clazz.ctors + clazz.methods |
| for m in examine: |
| if "Listener" in m.name or "Callback" in m.name: continue |
| found = False |
| for a in m.args: |
| if a.endswith("Callback") or a.endswith("Callbacks") or a.endswith("Listener"): |
| found = True |
| elif found and a != "android.os.Handler": |
| warn(clazz, m, "M3", "Listeners should always be at end of argument list") |
| |
| |
| def verify_resource_names(clazz): |
| """Verifies that resource names have consistent case.""" |
| if not re.match("android\.R\.[a-z]+", clazz.fullname): return |
| |
| # Resources defined by files are foo_bar_baz |
| if clazz.name in ["anim","animator","color","dimen","drawable","interpolator","layout","transition","menu","mipmap","string","plurals","raw","xml"]: |
| for f in clazz.fields: |
| if re.match("[a-z1-9_]+$", f.name): continue |
| error(clazz, f, None, "Expected resource name in this class to be foo_bar_baz style") |
| |
| # Resources defined inside files are fooBarBaz |
| if clazz.name in ["array","attr","id","bool","fraction","integer"]: |
| for f in clazz.fields: |
| if re.match("config_[a-z][a-zA-Z1-9]*$", f.name): continue |
| if re.match("layout_[a-z][a-zA-Z1-9]*$", f.name): continue |
| if re.match("state_[a-z_]*$", f.name): continue |
| |
| if re.match("[a-z][a-zA-Z1-9]*$", f.name): continue |
| error(clazz, f, "C7", "Expected resource name in this class to be fooBarBaz style") |
| |
| # Styles are FooBar_Baz |
| if clazz.name in ["style"]: |
| for f in clazz.fields: |
| if re.match("[A-Z][A-Za-z1-9]+(_[A-Z][A-Za-z1-9]+?)*$", f.name): continue |
| error(clazz, f, "C7", "Expected resource name in this class to be FooBar_Baz style") |
| |
| |
| def verify_files(clazz): |
| """Verifies that methods accepting File also accept streams.""" |
| |
| has_file = set() |
| has_stream = set() |
| |
| test = [] |
| test.extend(clazz.ctors) |
| test.extend(clazz.methods) |
| |
| for m in test: |
| if "java.io.File" in m.args: |
| has_file.add(m) |
| if "java.io.FileDescriptor" in m.args or "android.os.ParcelFileDescriptor" in m.args or "java.io.InputStream" in m.args or "java.io.OutputStream" in m.args: |
| has_stream.add(m.name) |
| |
| for m in has_file: |
| if m.name not in has_stream: |
| warn(clazz, m, "M10", "Methods accepting File should also accept FileDescriptor or streams") |
| |
| |
| def verify_manager_list(clazz): |
| """Verifies that managers return List<? extends Parcelable> instead of arrays.""" |
| |
| if not clazz.name.endswith("Manager"): return |
| |
| for m in clazz.methods: |
| if m.typ.startswith("android.") and m.typ.endswith("[]"): |
| warn(clazz, m, None, "Methods should return List<? extends Parcelable> instead of Parcelable[] to support ParceledListSlice under the hood") |
| |
| |
| def examine_clazz(clazz): |
| """Find all style issues in the given class.""" |
| if clazz.pkg.name.startswith("java"): return |
| if clazz.pkg.name.startswith("junit"): return |
| if clazz.pkg.name.startswith("org.apache"): return |
| if clazz.pkg.name.startswith("org.xml"): return |
| if clazz.pkg.name.startswith("org.json"): return |
| if clazz.pkg.name.startswith("org.w3c"): return |
| if clazz.pkg.name.startswith("android.icu."): return |
| |
| verify_constants(clazz) |
| verify_enums(clazz) |
| verify_class_names(clazz) |
| verify_method_names(clazz) |
| verify_callbacks(clazz) |
| verify_listeners(clazz) |
| verify_actions(clazz) |
| verify_extras(clazz) |
| verify_equals(clazz) |
| verify_parcelable(clazz) |
| verify_protected(clazz) |
| verify_fields(clazz) |
| verify_register(clazz) |
| verify_sync(clazz) |
| verify_intent_builder(clazz) |
| verify_helper_classes(clazz) |
| verify_builder(clazz) |
| verify_aidl(clazz) |
| verify_internal(clazz) |
| verify_layering(clazz) |
| verify_boolean(clazz) |
| verify_collections(clazz) |
| verify_flags(clazz) |
| verify_exception(clazz) |
| if not ALLOW_GOOGLE: verify_google(clazz) |
| verify_bitset(clazz) |
| verify_manager(clazz) |
| verify_boxed(clazz) |
| verify_static_utils(clazz) |
| verify_overload_args(clazz) |
| verify_callback_handlers(clazz) |
| verify_context_first(clazz) |
| verify_listener_last(clazz) |
| verify_resource_names(clazz) |
| verify_files(clazz) |
| verify_manager_list(clazz) |
| |
| |
| def examine_stream(stream): |
| """Find all style issues in the given API stream.""" |
| global failures |
| failures = {} |
| _parse_stream(stream, examine_clazz) |
| return failures |
| |
| |
| def examine_api(api): |
| """Find all style issues in the given parsed API.""" |
| global failures |
| failures = {} |
| for key in sorted(api.keys()): |
| examine_clazz(api[key]) |
| return failures |
| |
| |
| def verify_compat(cur, prev): |
| """Find any incompatible API changes between two levels.""" |
| global failures |
| |
| def class_exists(api, test): |
| return test.fullname in api |
| |
| def ctor_exists(api, clazz, test): |
| for m in clazz.ctors: |
| if m.ident == test.ident: return True |
| return False |
| |
| def all_methods(api, clazz): |
| methods = list(clazz.methods) |
| if clazz.extends is not None: |
| methods.extend(all_methods(api, api[clazz.extends])) |
| return methods |
| |
| def method_exists(api, clazz, test): |
| methods = all_methods(api, clazz) |
| for m in methods: |
| if m.ident == test.ident: return True |
| return False |
| |
| def field_exists(api, clazz, test): |
| for f in clazz.fields: |
| if f.ident == test.ident: return True |
| return False |
| |
| failures = {} |
| for key in sorted(prev.keys()): |
| prev_clazz = prev[key] |
| |
| if not class_exists(cur, prev_clazz): |
| error(prev_clazz, None, None, "Class removed or incompatible change") |
| continue |
| |
| cur_clazz = cur[key] |
| |
| for test in prev_clazz.ctors: |
| if not ctor_exists(cur, cur_clazz, test): |
| error(prev_clazz, prev_ctor, None, "Constructor removed or incompatible change") |
| |
| methods = all_methods(prev, prev_clazz) |
| for test in methods: |
| if not method_exists(cur, cur_clazz, test): |
| error(prev_clazz, test, None, "Method removed or incompatible change") |
| |
| for test in prev_clazz.fields: |
| if not field_exists(cur, cur_clazz, test): |
| error(prev_clazz, test, None, "Field removed or incompatible change") |
| |
| return failures |
| |
| |
| if __name__ == "__main__": |
| parser = argparse.ArgumentParser(description="Enforces common Android public API design \ |
| patterns. It ignores lint messages from a previous API level, if provided.") |
| parser.add_argument("current.txt", type=argparse.FileType('r'), help="current.txt") |
| parser.add_argument("previous.txt", nargs='?', type=argparse.FileType('r'), default=None, |
| help="previous.txt") |
| parser.add_argument("--no-color", action='store_const', const=True, |
| help="Disable terminal colors") |
| parser.add_argument("--allow-google", action='store_const', const=True, |
| help="Allow references to Google") |
| args = vars(parser.parse_args()) |
| |
| if args['no_color']: |
| USE_COLOR = False |
| |
| if args['allow_google']: |
| ALLOW_GOOGLE = True |
| |
| current_file = args['current.txt'] |
| previous_file = args['previous.txt'] |
| |
| with current_file as f: |
| cur_fail = examine_stream(f) |
| if not previous_file is None: |
| with previous_file as f: |
| prev_fail = examine_stream(f) |
| |
| # ignore errors from previous API level |
| for p in prev_fail: |
| if p in cur_fail: |
| del cur_fail[p] |
| |
| """ |
| # NOTE: disabled because of memory pressure |
| # look for compatibility issues |
| compat_fail = verify_compat(cur, prev) |
| |
| print "%s API compatibility issues %s\n" % ((format(fg=WHITE, bg=BLUE, bold=True), format(reset=True))) |
| for f in sorted(compat_fail): |
| print compat_fail[f] |
| print |
| """ |
| |
| print "%s API style issues %s\n" % ((format(fg=WHITE, bg=BLUE, bold=True), format(reset=True))) |
| for f in sorted(cur_fail): |
| print cur_fail[f] |
| print |
