+#include "ccanlint.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <err.h>
+#include <string.h>
+#include <ccan/noerr/noerr.h>
+
+static void *check_has_info(struct manifest *m)
+{
+ if (m->info_file)
+ return NULL;
+ return m;
+}
+
+static const char *describe_has_info(struct manifest *m, void *check_result)
+{
+ return "You have no _info.c file.\n\n"
+ "The file _info.c contains the metadata for a ccan package: things\n"
+ "like the dependencies, the documentation for the package as a whole\n"
+ "and license information.\n";
+}
+
+static const char template[] =
+ "#include <string.h>\n"
+ "#include \"config.h\"\n"
+ "\n"
+ "/**\n"
+ " * %s - YOUR-ONE-LINE-DESCRIPTION-HERE\n"
+ " *\n"
+ " * This code ... YOUR-BRIEF-SUMMARY-HERE\n"
+ " *\n"
+ " * Example:\n"
+ " * FULLY-COMPILABLE-INDENTED-TRIVIAL-BUT-USEFUL-EXAMPLE-HERE\n"
+ " */\n"
+ "int main(int argc, char *argv[])\n"
+ "{\n"
+ " /* Expect exactly one argument */\n"
+ " if (argc != 2)\n"
+ " return 1;\n"
+ "\n"
+ " if (strcmp(argv[1], \"depends\") == 0) {\n"
+ " PRINTF-CCAN-PACKAGES-YOU-NEED-ONE-PER-LINE-IF-ANY\n"
+ " return 0;\n"
+ " }\n"
+ "\n"
+ " return 1;\n"
+ "}\n";
+
+static void create_info_template(struct manifest *m, void *check_result)
+{
+ FILE *info;
+
+ if (!ask("Should I create a template _info.c file for you?"))
+ return;
+
+ info = fopen("_info.c", "w");
+ if (!info)
+ err(1, "Trying to create a template _info.c");
+
+ if (fprintf(info, template, m->basename) < 0) {
+ unlink_noerr("_info.c");
+ err(1, "Writing template into _info.c");
+ }
+ fclose(info);
+}
+
+struct ccanlint has_info = {
+ .name = "Has _info.c file",
+ .check = check_has_info,
+ .describe = describe_has_info,
+ .handle = create_info_template,
+};