-
Notifications
You must be signed in to change notification settings - Fork 2k
Expand file tree
/
Copy pathModule.qll
More file actions
282 lines (242 loc) · 9 KB
/
Module.qll
File metadata and controls
282 lines (242 loc) · 9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
import python
private import semmle.python.objects.Modules
private import semmle.python.internal.CachedStages
/**
* A module. This is the top level element in an AST, corresponding to a source file.
* It is also a Scope; the scope of global variables.
*/
class Module extends Module_, Scope, AstNode {
override string toString() {
result = this.getKind() + " " + this.getName()
or
/* No name is defined, which means that this module is not on an import path. So it must be a script */
not exists(this.getName()) and
not this.isPackage() and
result = "Script " + this.getFile().getShortName()
or
/* Package missing name, so just use the path instead */
not exists(this.getName()) and
this.isPackage() and
result = "Package at " + this.getPath().getAbsolutePath()
}
/**
* Gets the enclosing scope of this module (always none).
*
* This method will be deprecated in the next release. Please use `getEnclosingScope()` instead.
*/
override Scope getScope() { none() }
/** Gets the enclosing scope of this module (always none) */
override Scope getEnclosingScope() { none() }
/** Gets the statements forming the body of this module */
override StmtList getBody() { result = Module_.super.getBody() }
/** Gets the nth statement of this module */
override Stmt getStmt(int n) { result = Module_.super.getStmt(n) }
/** Gets a top-level statement in this module */
override Stmt getAStmt() { result = Module_.super.getAStmt() }
/** Gets the name of this module */
override string getName() {
result = Module_.super.getName() and legalDottedName(result)
or
not exists(Module_.super.getName()) and
result = moduleNameFromFile(this.getPath())
}
/** Gets the short name of the module. For example the short name of module x.y.z is 'z' */
string getShortName() {
result = this.getName().suffix(this.getPackage().getName().length() + 1)
or
result = this.getName() and not exists(this.getPackage())
}
/** Gets this module */
override Module getEnclosingModule() { result = this }
/** Gets the __init__ module of this module if the module is a package and it has an __init__ module */
Module getInitModule() {
/* this.isPackage() and */ result.getName() = this.getName() + ".__init__"
}
/** Whether this module is a package initializer */
predicate isPackageInit() { this.getName().matches("%\\_\\_init\\_\\_") and not this.isPackage() }
/** Gets a name exported by this module, that is the names that will be added to a namespace by 'from this-module import *' */
string getAnExport() {
py_exports(this, result)
or
exists(ModuleObjectInternal mod | mod.getSource() = this.getEntryNode() |
mod.(ModuleValue).exports(result)
)
}
/** Gets the source file for this module */
File getFile() { py_module_path(this, result) }
/** Gets the source file or folder for this module or package */
Container getPath() { py_module_path(this, result) }
/** Whether this is a package */
predicate isPackage() { this.getPath() instanceof Folder }
/** Gets the package containing this module (or parent package if this is a package) */
Module getPackage() {
this.getName().matches("%.%") and
result.getName() = this.getName().regexpReplaceAll("\\.[^.]*$", "")
}
/** Gets the name of the package containing this module */
string getPackageName() {
this.getName().matches("%.%") and
result = this.getName().regexpReplaceAll("\\.[^.]*$", "")
}
/** Gets the metrics for this module */
ModuleMetrics getMetrics() { result = this }
string getAnImportedModuleName() {
exists(Import i | i.getEnclosingModule() = this | result = i.getAnImportedModuleName())
or
exists(ImportStar i | i.getEnclosingModule() = this | result = i.getImportedModuleName())
}
override Location getLocation() {
py_scope_location(result, this)
or
not py_scope_location(_, this) and
locations_ast(result, this, 0, 0, 0, 0)
}
/** Gets a child module or package of this package */
Module getSubModule(string name) {
result.getPackage() = this and
name = result.getName().regexpReplaceAll(".*\\.", "")
}
/** Whether name is declared in the __all__ list of this module */
predicate declaredInAll(string name) {
exists(AssignStmt a, GlobalVariable all |
a.defines(all) and
a.getScope() = this and
all.getId() = "__all__" and
(
a.getValue().(List).getAnElt().(StrConst).getText() = name
or
a.getValue().(Tuple).getAnElt().(StrConst).getText() = name
)
)
}
override AstNode getAChildNode() { result = this.getAStmt() }
predicate hasFromFuture(string attr) {
exists(Import i, ImportMember im, ImportExpr ie, Alias a, Name name |
im.getModule() = ie and
ie.getName() = "__future__" and
a.getAsname() = name and
name.getId() = attr and
i.getASubExpression() = im and
i.getAName() = a and
i.getEnclosingModule() = this
)
}
/** Gets the path element from which this module was loaded. */
Container getLoadPath() { result = this.getPath().getImportRoot() }
/** Holds if this module is in the standard library for version `major.minor` */
predicate inStdLib(int major, int minor) { this.getLoadPath().isStdLibRoot(major, minor) }
/** Holds if this module is in the standard library */
predicate inStdLib() { this.getLoadPath().isStdLibRoot() }
override predicate containsInScope(AstNode inner) { Scope.super.containsInScope(inner) }
override predicate contains(AstNode inner) { Scope.super.contains(inner) }
/** Gets the kind of this module. */
override string getKind() {
if this.isPackage()
then result = "Package"
else (
not exists(Module_.super.getKind()) and result = "Module"
or
result = Module_.super.getKind()
)
}
}
bindingset[name]
private predicate legalDottedName(string name) {
name.regexpMatch("(\\p{L}|_)(\\p{L}|\\d|_)*(\\.(\\p{L}|_)(\\p{L}|\\d|_)*)*")
}
bindingset[name]
private predicate legalShortName(string name) { name.regexpMatch("(\\p{L}|_)(\\p{L}|\\d|_)*") }
/**
* Holds if `f` is potentially a source package.
* Does it have an __init__.py file (or --respect-init=False for Python 2) and is it within the source archive?
*/
private predicate isPotentialSourcePackage(Folder f) {
f.getRelativePath() != "" and
isPotentialPackage(f)
}
private predicate isPotentialPackage(Folder f) {
exists(f.getFile("__init__.py"))
or
py_flags_versioned("options.respect_init", "False", _) and major_version() = 2 and exists(f)
}
private string moduleNameFromBase(Container file) {
isPotentialPackage(file) and result = file.getBaseName()
or
file instanceof File and result = file.getStem()
}
/**
* Holds if `file` may be transitively imported from a file that may serve as the entry point of
* the execution.
*/
private predicate transitively_imported_from_entry_point(File file) {
file.getExtension().matches("%py%") and
exists(File importer |
// Only consider files that are in the source archive
exists(importer.getRelativePath()) and
importer.getParent() = file.getParent() and
exists(ImportExpr i |
i.getLocation().getFile() = importer and
i.getName() = file.getStem() and
// Disregard relative imports
i.getLevel() = 0
)
|
importer.isPossibleEntryPoint() or transitively_imported_from_entry_point(importer)
)
}
cached
string moduleNameFromFile(Container file) {
Stages::AST::ref() and
exists(string basename |
basename = moduleNameFromBase(file) and
legalShortName(basename)
|
result = moduleNameFromFile(file.getParent()) + "." + basename
or
// If `file` is a transitive import of a file that's executed directly, we allow references
// to it by its `basename`.
transitively_imported_from_entry_point(file) and
result = basename
)
or
isPotentialSourcePackage(file) and
result = file.getStem() and
(
not isPotentialSourcePackage(file.getParent()) or
not legalShortName(file.getParent().getBaseName())
)
or
result = file.getStem() and file.getParent() = file.getImportRoot()
or
result = file.getStem() and isStubRoot(file.getParent())
}
private predicate isStubRoot(Folder f) {
not f.getParent*().isImportRoot() and
f.getAbsolutePath().matches("%/data/python/stubs")
}
/**
* Holds if the Container `c` should be the preferred file or folder for
* the given name when performing imports.
* Trivially true for any container if it is the only one with its name.
* However, if there are several modules with the same name, then
* this is the module most likely to be imported under that name.
*/
predicate isPreferredModuleForName(Container c, string name) {
exists(int p |
p = min(int x | x = priorityForName(_, name)) and
p = priorityForName(c, name)
)
}
private int priorityForName(Container c, string name) {
name = moduleNameFromFile(c) and
(
// In the source
exists(c.getRelativePath()) and result = -1
or
// On an import path
exists(c.getImportRoot(result))
or
// Otherwise
result = 10000
)
}