GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/path_filters/dirtab.h
Date: 2024-04-28 02:33:07
Exec Total Coverage
Lines: 10 15 66.7%
Branches: 6 6 100.0%
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1 /**
2 * This file is part of the CernVM File System.
3 */
4
5 #ifndef CVMFS_PATH_FILTERS_DIRTAB_H_
6 #define CVMFS_PATH_FILTERS_DIRTAB_H_
7
8 #include <string>
9 #include <vector>
10
11 #include "pathspec/pathspec.h"
12
13 namespace catalog {
14
15 // TODO(jblomer): Dirtab and RelaxedPathFilter can use static inheritance. It
16 // is clear at compile time which one should be used. They are not on a
17 // critical path though.
18
19 /**
20 * A Dirtab is handling the parsing and processing of the .cvmfsdirtab file.
21 * The .cvmfsdirtab contains a list of Pathspecs that define where CernVM-FS
22 * should automatically create nested catalogs. Furthermore it can contain neg-
23 * ative rules to omit the automatic creation of nested catalogs in certain
24 * directories.
25 *
26 * Example (adding a space in front of * - silence compiler warning):
27 * # this is a .cvmfsdirtab comment
28 * /software/releases/ *
29 * /conditions_data/runs/ *
30 *
31 * # ignore repository directories
32 * ! *.svn
33 * ! *.git
34 *
35 * This .cvmfsdirtab file would generate nested catalogs in all directories
36 * directly inside /software/releases/ and /conditions_data/runs/ like:
37 * /software/releases/2.1.1-2/.cvmfscatalog
38 * /software/releases/2.3.4-1/.cvmfscatalog
39 * /software/releases/3.0.0-5/.cvmfscatalog
40 * ...
41 * /conditions_data/runs/27.11.2014/.cvmfscatalog
42 * /conditions_data/runs/11.09.2013/.cvmfscatalog
43 * ...
44 *
45 * Note: This class does not take care of the actual creation of nested catalogs
46 * but wraps the parsing and matching of the .cvmfsdirtab file and given
47 * path strings.
48 * See: swissknife_sync.{h,cc} or t_dirtab.cc for the usage of this class.
49 *
50 */
51 class Dirtab {
52 public:
53 static const char kCommentMarker = '#';
54 static const char kNegationMarker = '!';
55
56 /**
57 * A Rule represents a single line from a .cvmfsdirtab file. It wraps the
58 * parsed Pathspec for the path pattern in this line and stores if this Path-
59 * spec should be seen as a negation rule.
60 */
61 struct Rule {
62 65 Rule(const Pathspec &pathspec, const bool is_negation) :
63 65 pathspec(pathspec), is_negation(is_negation) {}
64 Pathspec pathspec;
65 bool is_negation;
66 };
67
68 typedef std::vector<Rule> Rules;
69
70 /**
71 * Creates an empty Dirtab (mainly for testing purposes)
72 */
73 Dirtab();
74
75 48 virtual ~Dirtab() {}
76
77 /**
78 * Returns an already filled Dirtab
79 *
80 * @param dirtab_path path of the dirtab file that will be used to fill
81 * the Dirtab object
82 * @return the already filled Dirtab
83 */
84 ✗ static Dirtab* Create(const std::string &dirtab_path) {
85 ✗ Dirtab *dt = new Dirtab();
86 ✗ dt->Open(dirtab_path);
87 ✗ return dt;
88 }
89
90 /**
91 * Parses the content of a .cvmfsdirtab file. This is called by the filepath-
92 * constructor or can be used on an empty Dirtab for testing purposes and in
93 * inherited classes.
94 *
95 * @param dirtab a string containing the full content of a .cvmfsdirtab file
96 * @return true on successful parsing
97 */
98 virtual bool Parse(const std::string &dirtab);
99 virtual bool Parse(FILE *dirtab_file);
100
101 /**
102 * Matches a given path string against this Dirtab. The path is considered a
103 * match if it matches against (at least) one positive rule and is not matched
104 * by any negative rule.
105 *
106 * @param path the path string to be matched against this Dirtab
107 * @return true if path string is matching this Dirtab
108 */
109 virtual bool IsMatching(const std::string &path) const;
110
111 /**
112 * Matches a given path string against all negative rules in this Dirtab. This
113 * bypasses the check for positive rules, thus a path string can be opposed by
114 * this Dirtab while it would also not match any positive rule.
115 *
116 * @param path the path string to be checked for opposition of this Dirtab
117 * @return true if (at least) one negative rule matches
118 */
119 virtual bool IsOpposing(const std::string &path) const;
120
121 ✗ const Rules& positive_rules() const { return positive_rules_; }
122 const Rules& negative_rules() const { return negative_rules_; }
123
124 15 size_t RuleCount() const { return NegativeRuleCount() + PositiveRuleCount(); }
125 30 size_t NegativeRuleCount() const { return negative_rules_.size(); }
126 30 size_t PositiveRuleCount() const { return positive_rules_.size(); }
127 17 bool IsValid() const { return valid_; }
128
129 protected:
130 /**
131 * Fill a Dirtab from a given .cvmfsdirtab file path.
132 */
133 bool Open(const std::string &dirtab_path);
134 bool ParseLine(const std::string &line);
135 virtual bool ParsePathspec(const std::string &pathspec_str, bool negation);
136 void AddRule(const Rule &rule);
137
138 private:
139 124 void SkipWhitespace(
140 const std::string::const_iterator &end,
141 std::string::const_iterator *itr) const
142 {
143
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 160 for (; *itr != end && **itr == ' '; ++(*itr)) { }
144 124 }
145 bool CheckRuleValidity() const;
146
147 private:
148 bool valid_;
149 Rules positive_rules_;
150 Rules negative_rules_;
151 };
152
153 } // namespace catalog
154
155 #endif // CVMFS_PATH_FILTERS_DIRTAB_H_
156
157