list-objects: check if filter is NULL before using
[git/git.git] / list-objects-filter-options.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "config.h"
4 #include "revision.h"
5 #include "argv-array.h"
6 #include "list-objects.h"
7 #include "list-objects-filter.h"
8 #include "list-objects-filter-options.h"
9
10 /*
11 * Parse value of the argument to the "filter" keyword.
12 * On the command line this looks like:
13 * --filter=<arg>
14 * and in the pack protocol as:
15 * "filter" SP <arg>
16 *
17 * The filter keyword will be used by many commands.
18 * See Documentation/rev-list-options.txt for allowed values for <arg>.
19 *
20 * Capture the given arg as the "filter_spec". This can be forwarded to
21 * subordinate commands when necessary. We also "intern" the arg for
22 * the convenience of the current command.
23 */
24 static int gently_parse_list_objects_filter(
25 struct list_objects_filter_options *filter_options,
26 const char *arg,
27 struct strbuf *errbuf)
28 {
29 const char *v0;
30
31 if (filter_options->choice) {
32 if (errbuf) {
33 strbuf_init(errbuf, 0);
34 strbuf_addstr(
35 errbuf,
36 _("multiple filter-specs cannot be combined"));
37 }
38 return 1;
39 }
40
41 filter_options->filter_spec = strdup(arg);
42
43 if (!strcmp(arg, "blob:none")) {
44 filter_options->choice = LOFC_BLOB_NONE;
45 return 0;
46
47 } else if (skip_prefix(arg, "blob:limit=", &v0)) {
48 if (git_parse_ulong(v0, &filter_options->blob_limit_value)) {
49 filter_options->choice = LOFC_BLOB_LIMIT;
50 return 0;
51 }
52
53 } else if (skip_prefix(arg, "sparse:oid=", &v0)) {
54 struct object_context oc;
55 struct object_id sparse_oid;
56
57 /*
58 * Try to parse <oid-expression> into an OID for the current
59 * command, but DO NOT complain if we don't have the blob or
60 * ref locally.
61 */
62 if (!get_oid_with_context(v0, GET_OID_BLOB,
63 &sparse_oid, &oc))
64 filter_options->sparse_oid_value = oiddup(&sparse_oid);
65 filter_options->choice = LOFC_SPARSE_OID;
66 return 0;
67
68 } else if (skip_prefix(arg, "sparse:path=", &v0)) {
69 filter_options->choice = LOFC_SPARSE_PATH;
70 filter_options->sparse_path_value = strdup(v0);
71 return 0;
72 }
73
74 if (errbuf) {
75 strbuf_init(errbuf, 0);
76 strbuf_addf(errbuf, "invalid filter-spec '%s'", arg);
77 }
78 memset(filter_options, 0, sizeof(*filter_options));
79 return 1;
80 }
81
82 int parse_list_objects_filter(struct list_objects_filter_options *filter_options,
83 const char *arg)
84 {
85 struct strbuf buf = STRBUF_INIT;
86 if (gently_parse_list_objects_filter(filter_options, arg, &buf))
87 die("%s", buf.buf);
88 return 0;
89 }
90
91 int opt_parse_list_objects_filter(const struct option *opt,
92 const char *arg, int unset)
93 {
94 struct list_objects_filter_options *filter_options = opt->value;
95
96 if (unset || !arg) {
97 list_objects_filter_set_no_filter(filter_options);
98 return 0;
99 }
100
101 return parse_list_objects_filter(filter_options, arg);
102 }
103
104 void list_objects_filter_release(
105 struct list_objects_filter_options *filter_options)
106 {
107 free(filter_options->filter_spec);
108 free(filter_options->sparse_oid_value);
109 free(filter_options->sparse_path_value);
110 memset(filter_options, 0, sizeof(*filter_options));
111 }
112
113 void partial_clone_register(
114 const char *remote,
115 const struct list_objects_filter_options *filter_options)
116 {
117 /*
118 * Record the name of the partial clone remote in the
119 * config and in the global variable -- the latter is
120 * used throughout to indicate that partial clone is
121 * enabled and to expect missing objects.
122 */
123 if (repository_format_partial_clone &&
124 *repository_format_partial_clone &&
125 strcmp(remote, repository_format_partial_clone))
126 die(_("cannot change partial clone promisor remote"));
127
128 git_config_set("core.repositoryformatversion", "1");
129 git_config_set("extensions.partialclone", remote);
130
131 repository_format_partial_clone = xstrdup(remote);
132
133 /*
134 * Record the initial filter-spec in the config as
135 * the default for subsequent fetches from this remote.
136 */
137 core_partial_clone_filter_default =
138 xstrdup(filter_options->filter_spec);
139 git_config_set("core.partialclonefilter",
140 core_partial_clone_filter_default);
141 }
142
143 void partial_clone_get_default_filter_spec(
144 struct list_objects_filter_options *filter_options)
145 {
146 /*
147 * Parse default value, but silently ignore it if it is invalid.
148 */
149 if (!core_partial_clone_filter_default)
150 return;
151 gently_parse_list_objects_filter(filter_options,
152 core_partial_clone_filter_default,
153 NULL);
154 }