git.ozlabs.org Git - ccan/blob - tools/ccanlint/tests/has_info_documentation.c

   1 #include <tools/ccanlint/ccanlint.h>
   2 #include <tools/doc_extract.h>
   3 #include <tools/tools.h>
   4 #include <sys/types.h>
   5 #include <sys/stat.h>
   6 #include <fcntl.h>
   7 #include <unistd.h>
   8 #include <limits.h>
   9 #include <errno.h>
  10 #include <stdlib.h>
  11 #include <stdio.h>
  12 #include <err.h>
  13 #include <ccan/str/str.h>
  14 #include <ccan/talloc/talloc.h>
  15 #include <ccan/noerr/noerr.h>
  16 #include <ccan/grab_file/grab_file.h>
  17
  18 struct info_docs
  19 {
  20         bool summary;
  21         bool description;
  22         bool example;
  23 };
  24
  25 static void *check_has_info_documentation(struct manifest *m)
  26 {
  27         struct list_head *infodocs = get_ccan_file_docs(m->info_file);
  28         struct doc_section *d;
  29         struct info_docs id = { false, false, false };
  30
  31         list_for_each(infodocs, d, list) {
  32                 if (!streq(d->function, m->basename))
  33                         continue;
  34                 if (streq(d->type, "summary"))
  35                         id.summary = true;
  36                 if (streq(d->type, "description"))
  37                         id.description = true;
  38                 if (streq(d->type, "example"))
  39                         id.example = true;
  40         }
  41
  42         if (id.summary && id.description && id.example)
  43                 return NULL;
  44         return talloc_memdup(m, &id, sizeof(id));
  45 }
  46
  47 /* This is defined below. */
  48 extern struct ccanlint has_info_documentation;
  49
  50 static void create_info_template_doc(struct manifest *m, void *check_result)
  51 {
  52         int fd = open("_info.new", O_WRONLY|O_CREAT|O_EXCL, 0666);
  53         FILE *new;
  54         char *oldcontents;
  55
  56         if (fd < 0 || !(new = fdopen(fd, "w")))
  57                 err(1, "Creating _info.new to insert documentation");
  58
  59         if (fprintf(new,
  60                     "/**\n"
  61                     " * %s - [[ONE LINE DESCRIPTION HERE]]\n"
  62                     " *\n"
  63                     " * Paragraphs why %s exists and where to use it.\n"
  64                     " *\n"
  65                     " * Followed by an Example: section with a standalone\n"
  66                     " * (trivial and usually useless) program\n"
  67                     " */\n", m->basename, m->basename) < 0) {
  68                 unlink_noerr("_info.new");
  69                 err(1, "Writing to _info.new to insert documentation");
  70         }
  71
  72         oldcontents = grab_file(m, "_info", NULL);
  73         if (!oldcontents) {
  74                 unlink_noerr("_info.new");
  75                 err(1, "Reading _info");
  76         }
  77         if (fprintf(new, "%s", oldcontents) < 0) {
  78                 unlink_noerr("_info.new");
  79                 err(1, "Appending _info to _info.new");
  80         }
  81         if (fclose(new) != 0) {
  82                 unlink_noerr("_info.new");
  83                 err(1, "Closing _info.new");
  84         }
  85         if (!move_file("_info.new", "_info")) {
  86                 unlink_noerr("_info.new");
  87                 err(1, "Renaming _info.new to _info");
  88         }
  89 }
  90
  91 static const char *describe_has_info_documentation(struct manifest *m,
  92                                                    void *check_result)
  93 {
  94         struct info_docs *id = check_result;
  95         char *reason = talloc_strdup(m, "");
  96
  97         if (!id->summary) {
  98                 has_info_documentation.handle = create_info_template_doc;
  99                 reason = talloc_asprintf_append(reason,
 100                 "Your _info file has no module documentation.\n\n"
 101                 "CCAN modules use /**-style comments for documentation: the\n"
 102                 "overall documentation belongs in the _info metafile.\n");
 103         }
 104         if (!id->description)
 105                 reason = talloc_asprintf_append(reason,
 106                 "Your _info file has no module description.\n\n"
 107                 "The lines after the first summary line in the _info file\n"
 108                 "documentation should describe the purpose and use of the\n"
 109                 "overall package\n");
 110         if (!id->example)
 111                 reason = talloc_asprintf_append(reason,
 112                 "Your _info file has no module example.\n\n"
 113                 "There should be an Example: section of the _info documentation\n"
 114                 "which provides a concise toy program which uses your module\n");
 115         return reason;
 116 }
 117
 118 static unsigned int has_info_documentation_score(struct manifest *m,
 119                                                  void *check_result)
 120 {
 121         struct info_docs *id = check_result;
 122         return id->summary + id->description + id->example;
 123 }
 124
 125 struct ccanlint has_info_documentation = {
 126         .key = "info-documentation",
 127         .name = "Module has documentation in _info",
 128         .total_score = 3,
 129         .score = has_info_documentation_score,
 130         .check = check_has_info_documentation,
 131         .describe = describe_has_info_documentation,
 132 };
 133
 134 REGISTER_TEST(has_info_documentation, NULL);