GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/pathspec/pathspec.cc
Date: 2026-01-04 02:35:37
Exec Total Coverage
Lines: 198 207 95.7%
Branches: 120 172 69.8%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #include "pathspec.h"
6
7 #include <cassert>
8
9 #include "util/logging.h"
10 #include "util/smalloc.h"
11
12 4537 Pathspec::Pathspec(const std::string &spec)
13 4537 : regex_(NULL)
14 4537 , relaxed_regex_(NULL)
15 4537 , prefix_regex_(NULL)
16 4537 , regex_compiled_(false)
17 4537 , relaxed_regex_compiled_(false)
18 4537 , prefix_regex_compiled_(false)
19 4537 , glob_string_compiled_(false)
20 4537 , glob_string_sequence_compiled_(false)
21 4537 , valid_(true)
22 4537 , absolute_(false) {
23
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 4537 Parse(spec);
24
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 4537 if (patterns_.size() == 0) {
25 34 valid_ = false;
26 }
27
28 4537 ElementPatterns::const_iterator i = patterns_.begin();
29 4537 const ElementPatterns::const_iterator iend = patterns_.end();
30
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 14460 for (; i != iend; ++i) {
31
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 9923 if (!i->IsValid()) {
32 68 valid_ = false;
33 }
34 }
35 4537 }
36
37 // Compiled regex structure cannot be duplicated and needs to be re-compiled
38 // Note: the copy-constructed object will perform a lazy evaluation again
39 3184 Pathspec::Pathspec(const Pathspec &other)
40 3184 : patterns_(other.patterns_)
41 3184 , regex_(NULL)
42 3184 , relaxed_regex_(NULL)
43 3184 , prefix_regex_(NULL)
44
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 3184 , glob_string_(other.glob_string_)
45
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 3184 , glob_string_sequence_(other.glob_string_sequence_)
46 3184 , regex_compiled_(false)
47 3184 , relaxed_regex_compiled_(false)
48 3184 , prefix_regex_compiled_(false)
49 3184 , glob_string_compiled_(other.glob_string_compiled_)
50 3184 , glob_string_sequence_compiled_(other.glob_string_sequence_compiled_)
51 3184 , valid_(other.valid_)
52 3184 , absolute_(other.absolute_) { }
53
54 7718 Pathspec::~Pathspec() { DestroyRegularExpressions(); }
55
56 102 Pathspec &Pathspec::operator=(const Pathspec &other) {
57
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 102 if (this != &other) {
58 102 DestroyRegularExpressions(); // see: copy c'tor for details
59 102 patterns_ = other.patterns_;
60
61 102 glob_string_compiled_ = other.glob_string_compiled_;
62 102 glob_string_ = other.glob_string_;
63
64 102 glob_string_sequence_compiled_ = other.glob_string_sequence_compiled_;
65 102 glob_string_sequence_ = other.glob_string_sequence_;
66
67 102 valid_ = other.valid_;
68 102 absolute_ = other.absolute_;
69 }
70
71 102 return *this;
72 }
73
74
75 4537 void Pathspec::Parse(const std::string &spec) {
76 // parsing is done using std::string iterators to walk through the entire
77 // pathspec parameter. Thus, all parsing methods receive references to these
78 // iterators and increment itr as they pass along.
79 4537 std::string::const_iterator itr = spec.begin();
80 4537 const std::string::const_iterator end = spec.end();
81
82 4537 absolute_ = (*itr == kSeparator);
83
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 23000 while (itr != end) {
84
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 18463 if (*itr == kSeparator) {
85 8540 ++itr;
86 8540 continue;
87 }
88
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 9923 ParsePathElement(end, &itr);
89 }
90 4537 }
91
92 9923 void Pathspec::ParsePathElement(const std::string::const_iterator &end,
93 std::string::const_iterator *itr) {
94 // find the end of the current pattern element (next directory boundary)
95 9923 const std::string::const_iterator begin_element = *itr;
96
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 51455 while (*itr != end && **itr != kSeparator) {
97 41532 ++(*itr);
98 }
99 9923 const std::string::const_iterator end_element = *itr;
100
101 // create a PathspecElementPattern out of this directory description
102
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 9923 patterns_.push_back(PathspecElementPattern(begin_element, end_element));
103 9923 }
104
105 9680 bool Pathspec::IsMatching(const std::string &query_path) const {
106
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 9680 assert(IsValid());
107
108
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 9680 if (query_path.empty()) {
109 149 return false;
110 }
111
112 9531 const bool query_is_absolute = (query_path[0] == kSeparator);
113
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 6505 return (!query_is_absolute || this->IsAbsolute())
114
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 16036 && IsPathspecMatching(query_path);
115 }
116
117 408 bool Pathspec::IsPrefixMatching(const std::string &query_path) const {
118
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 408 assert(IsValid());
119
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 408 assert(IsAbsolute());
120
121
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 408 if (query_path.empty()) {
122 ✗ return false;
123 }
124
125 408 const bool query_is_absolute = (query_path[0] == kSeparator);
126
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 408 return (query_is_absolute && IsPathspecPrefixMatching(query_path));
127 }
128
129 5859 bool Pathspec::IsMatchingRelaxed(const std::string &query_path) const {
130
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 5859 assert(IsValid());
131
132
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 5859 if (query_path.empty()) {
133 36 return false;
134 }
135
136 5823 return IsPathspecMatchingRelaxed(query_path);
137 }
138
139 9089 bool Pathspec::IsPathspecMatching(const std::string &query_path) const {
140 9089 return ApplyRegularExpression(query_path, GetRegularExpression());
141 }
142
143 374 bool Pathspec::IsPathspecPrefixMatching(const std::string &query_path) const {
144 374 return ApplyRegularExpression(query_path, GetPrefixRegularExpression());
145 }
146
147 5823 bool Pathspec::IsPathspecMatchingRelaxed(const std::string &query_path) const {
148 5823 return ApplyRegularExpression(query_path, GetRelaxedRegularExpression());
149 }
150
151 15286 bool Pathspec::ApplyRegularExpression(const std::string &query_path,
152 regex_t *regex) const {
153 15286 const char *path = query_path.c_str();
154 15286 const int retval = regexec(regex, path, 0, NULL, 0);
155
156
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 15286 if (retval != 0 && retval != REG_NOMATCH) {
157 ✗ PrintRegularExpressionError(retval);
158 }
159
160 15286 return (retval == 0);
161 }
162
163 9089 regex_t *Pathspec::GetRegularExpression() const {
164
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 9089 if (!regex_compiled_) {
165 1824 const bool is_relaxed = false;
166
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 1824 const std::string regex = GenerateRegularExpression(is_relaxed);
167
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 1824 LogCvmfs(kLogPathspec, kLogDebug, "compiled regex: %s", regex.c_str());
168
169
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 1824 regex_ = CompileRegularExpression(regex);
170 1824 regex_compiled_ = true;
171 1824 }
172
173 9089 return regex_;
174 }
175
176 374 regex_t *Pathspec::GetPrefixRegularExpression() const {
177
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 374 if (!prefix_regex_compiled_) {
178 68 const bool is_relaxed = false;
179 68 const bool is_prefix = true;
180
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 68 const std::string regex = GenerateRegularExpression(is_relaxed, is_prefix);
181
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 68 LogCvmfs(kLogPathspec, kLogDebug, "compiled regex: %s", regex.c_str());
182
183
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 68 prefix_regex_ = CompileRegularExpression(regex);
184 68 prefix_regex_compiled_ = true;
185 68 }
186
187 374 return prefix_regex_;
188 }
189
190 5823 regex_t *Pathspec::GetRelaxedRegularExpression() const {
191
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 5823 if (!relaxed_regex_compiled_) {
192 655 const bool is_relaxed = true;
193
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 655 const std::string regex = GenerateRegularExpression(is_relaxed);
194
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 655 LogCvmfs(kLogPathspec, kLogDebug, "compiled relaxed regex: %s",
195 regex.c_str());
196
197
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 655 relaxed_regex_ = CompileRegularExpression(regex);
198 655 relaxed_regex_compiled_ = true;
199 655 }
200
201 5823 return relaxed_regex_;
202 }
203
204 2547 std::string Pathspec::GenerateRegularExpression(const bool is_relaxed,
205 const bool is_prefix) const {
206 // start matching at the first character
207
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 2547 std::string regex = "^";
208
209 // absolute paths require a / in the beginning
210
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 2547 if (IsAbsolute()) {
211
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 1967 regex += kSeparator;
212 }
213
214 // concatenate the regular expressions of the compiled path elements
215 2547 ElementPatterns::const_iterator i = patterns_.begin();
216 2547 const ElementPatterns::const_iterator iend = patterns_.end();
217
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 8021 for (; i != iend; ++i) {
218
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 5474 regex += i->GenerateRegularExpression(is_relaxed);
219
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 5474 if (i + 1 != iend) {
220
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 2927 regex += kSeparator;
221 }
222 }
223
224
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 2547 if (is_prefix) {
225
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 68 regex += "($|";
226
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 68 regex += kSeparator;
227
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 68 regex += ".*$)";
228 } else {
229 // a path might end with a trailing slash
230 // (pathspec does not distinguish files and directories)
231
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 2479 regex += kSeparator;
232
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 2479 regex += "?$";
233 }
234
235 5094 return regex;
236 }
237
238 2547 regex_t *Pathspec::CompileRegularExpression(const std::string &regex) const {
239 2547 regex_t *result = reinterpret_cast<regex_t *>(smalloc(sizeof(regex_t)));
240 2547 const int flags = REG_NOSUB | REG_NEWLINE | REG_EXTENDED;
241 2547 const int retval = regcomp(result, regex.c_str(), flags);
242
243
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 2547 if (retval != 0) {
244 ✗ PrintRegularExpressionError(retval);
245 ✗ assert(false && "failed to compile regex");
246 }
247
248 2547 return result;
249 }
250
251 7820 void Pathspec::DestroyRegularExpressions() {
252
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 7820 if (regex_compiled_) {
253
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 1824 assert(regex_ != NULL);
254 1824 regfree(regex_);
255 1824 regex_ = NULL;
256 1824 regex_compiled_ = false;
257 }
258
259
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 7820 if (relaxed_regex_compiled_) {
260
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 655 assert(relaxed_regex_ != NULL);
261 655 regfree(relaxed_regex_);
262 655 relaxed_regex_ = NULL;
263 655 relaxed_regex_compiled_ = false;
264 }
265 7820 }
266
267 2068 bool Pathspec::operator==(const Pathspec &other) const {
268
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 3673 if (patterns_.size() != other.patterns_.size() || IsValid() != other.IsValid()
269
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 3673 || IsAbsolute() != other.IsAbsolute()) {
270 599 return false;
271 }
272
273 1469 ElementPatterns::const_iterator i = patterns_.begin();
274 1469 const ElementPatterns::const_iterator iend = patterns_.end();
275 1469 ElementPatterns::const_iterator j = other.patterns_.begin();
276 1469 const ElementPatterns::const_iterator jend = other.patterns_.end();
277
278
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 3665 for (; i != iend && j != jend; ++i, ++j) {
279
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 3136 if (*i != *j) {
280 940 return false;
281 }
282 }
283
284 529 return true;
285 }
286
287 ✗ void Pathspec::PrintRegularExpressionError(const int error_code) const {
288 ✗ assert(regex_compiled_);
289 ✗ const size_t errbuf_size = 1024;
290 char error[errbuf_size];
291 ✗ regerror(error_code, regex_, error, errbuf_size);
292 ✗ LogCvmfs(kLogPathspec, kLogStderr, "RegEx Error: %d - %s", error_code, error);
293 }
294
295 578 const Pathspec::GlobStringSequence &Pathspec::GetGlobStringSequence() const {
296
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 578 if (!glob_string_sequence_compiled_) {
297 578 GenerateGlobStringSequence();
298 578 glob_string_sequence_compiled_ = true;
299 }
300 578 return glob_string_sequence_;
301 }
302
303
304 578 void Pathspec::GenerateGlobStringSequence() const {
305
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 578 assert(glob_string_sequence_.empty());
306 578 ElementPatterns::const_iterator i = patterns_.begin();
307 578 const ElementPatterns::const_iterator iend = patterns_.end();
308
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 1734 for (; i != iend; ++i) {
309
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 1156 const std::string glob_string = i->GenerateGlobString();
310
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 1156 glob_string_sequence_.push_back(glob_string);
311 1156 }
312 578 }
313
314
315 782 const std::string &Pathspec::GetGlobString() const {
316
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 782 if (!glob_string_compiled_) {
317 578 GenerateGlobString();
318 578 glob_string_compiled_ = true;
319 }
320 782 return glob_string_;
321 }
322
323
324 578 void Pathspec::GenerateGlobString() const {
325
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 578 assert(glob_string_.empty());
326
327 578 bool is_first = true;
328
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 578 const GlobStringSequence &seq = GetGlobStringSequence();
329 578 GlobStringSequence::const_iterator i = seq.begin();
330 578 const GlobStringSequence::const_iterator iend = seq.end();
331
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332
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 1156 if (!is_first || IsAbsolute()) {
333
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 952 glob_string_ += kSeparator;
334 }
335
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 1156 glob_string_ += *i;
336 1156 is_first = false;
337 }
338 578 }
339