+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <ctype.h>
+
+static const char *can_run(struct manifest *m)
+{
+ if (safe_mode)
+ return "Safe mode enabled";
+ return NULL;
+}
+
+static char *obj_list(const struct manifest *m)
+{
+ char *list;
+ struct ccan_file *i;
+
+ /* This CCAN module. */
+ list = talloc_asprintf(m, " %s.o", m->dir);
+
+ /* Other ccan modules we depend on. */
+ list_for_each(&m->dep_dirs, i, list) {
+ if (i->compiled)
+ list = talloc_asprintf_append(list, " %s", i->compiled);
+ }
+
+ return list;
+}
+
+static char *lib_list(const struct manifest *m)
+{
+ unsigned int i, num;
+ char **libs = get_libs(m, ".", &num, &m->info_file->compiled);
+ char *ret = talloc_strdup(m, "");
+
+ for (i = 0; i < num; i++)
+ ret = talloc_asprintf_append(ret, "-l%s ", libs[i]);
+ return ret;
+}
+
+static char *compile(const void *ctx,
+ struct manifest *m,
+ struct ccan_file *file,
+ bool keep)
+{
+ char *errmsg;
+
+ file->compiled = maybe_temp_file(ctx, "", keep, file->fullname);
+ errmsg = compile_and_link(ctx, file->fullname, ccan_dir,
+ obj_list(m), "", lib_list(m), file->compiled);
+ if (errmsg) {
+ talloc_free(file->compiled);
+ return errmsg;
+ }
+ return NULL;
+}
+
+struct score {
+ unsigned int score;
+ char *errors;
+};
+
+static char *start_main(char *ret)
+{
+ return talloc_asprintf_append(ret,
+ "/* Fake function wrapper inserted */\n"
+ "int main(int argc, char *argv[])\n"
+ "{\n");
+}
+
+static char *mangle(struct manifest *m, struct ccan_file *example)
+{
+ char **lines = get_ccan_file_lines(example);
+ char *ret;
+ bool in_function = false, fake_function = false;
+ unsigned int i;
+
+ ret = talloc_strdup(m, "/* Prepend a heap of headers. */\n"
+ "#include <assert.h>\n"
+ "#include <err.h>\n"
+ "#include <fcntl.h>\n"
+ "#include <stdbool.h>\n"
+ "#include <stdint.h>\n"
+ "#include <stdio.h>\n"
+ "#include <stdlib.h>\n"
+ "#include <string.h>\n"
+ "#include <sys/stat.h>\n"
+ "#include <sys/types.h>\n"
+ "#include <unistd.h>\n");
+ ret = talloc_asprintf_append(ret, "/* Include header from module. */\n"
+ "#include <ccan/%s/%s.h>\n",
+ m->basename, m->basename);
+
+ /* Starts indented? Wrap it in a main() function. */
+ if (lines[0] && isblank(lines[0][0])) {
+ ret = start_main(ret);
+ fake_function = true;
+ in_function = true;
+ }
+
+ /* Primitive, very primitive. */
+ for (i = 0; lines[i]; i++) {
+ /* } at start of line ends a function. */
+ if (in_function) {
+ if (lines[i][0] == '}')
+ in_function = false;
+ } else {
+ /* Character at start of line, with ( and no ;
+ * == function start. */
+ if (!isblank(lines[i][0])
+ && strchr(lines[i], '(')
+ && !strchr(lines[i], ';'))
+ in_function = true;
+ }
+ /* ... means elided code. If followed by spaced line, means
+ * next part is supposed to be inside a function. */
+ if (strcmp(lines[i], "...") == 0) {
+ if (!in_function
+ && lines[i+1]
+ && isblank(lines[i+1][0])) {
+ /* This implies we start a function here. */
+ ret = start_main(ret);
+ fake_function = true;
+ in_function = true;
+ }
+ ret = talloc_asprintf_append(ret,
+ "/* ... removed */\n");
+ continue;
+ }
+ ret = talloc_asprintf_append(ret, "%s\n", lines[i]);
+ }
+
+ if (fake_function)
+ ret = talloc_asprintf_append(ret, "return 0;\n"
+ "}\n");
+ return ret;
+}
+
+static struct ccan_file *mangle_example(struct manifest *m,
+ struct ccan_file *example, bool keep)
+{
+ char *name, *contents;
+ int fd;
+ struct ccan_file *f;
+
+ name = maybe_temp_file(example, ".c", keep,
+ talloc_asprintf(m, "%s/mangled-%s",
+ m->dir, example->name));
+ f = new_ccan_file(example,
+ talloc_dirname(example, name),
+ talloc_basename(example, name));
+ talloc_steal(f, name);
+
+ fd = open(f->fullname, O_WRONLY | O_CREAT | O_EXCL, 0600);
+ if (fd < 0)
+ return NULL;
+
+ contents = mangle(m, example);
+ if (write(fd, contents, strlen(contents)) != strlen(contents)) {
+ close(fd);
+ return NULL;
+ }
+ close(fd);
+ return f;
+}
+
+static void *build_examples(struct manifest *m, bool keep,
+ unsigned int *timeleft)
+{
+ struct ccan_file *i;
+ struct score *score = talloc(m, struct score);
+
+ score->score = 0;
+ score->errors = NULL;
+
+ list_for_each(&m->examples, i, list) {
+ char *ret;
+
+ examples_compile.total_score++;
+ ret = compile(score, m, i, keep);
+ if (!ret)
+ score->score++;
+ else {
+ struct ccan_file *mangle = mangle_example(m, i, keep);
+
+ talloc_free(ret);
+ ret = compile(score, m, mangle, keep);
+ if (!ret)
+ score->score++;
+ else {
+ if (!score->errors)
+ score->errors = ret;
+ else {
+ score->errors
+ = talloc_append_string(score->errors,
+ ret);
+ talloc_free(ret);
+ }
+ }
+ }
+ }
+ return score;
+}
+
+static unsigned int score_examples(struct manifest *m, void *check_result)
+{
+ struct score *score = check_result;
+ return score->score;
+}
+
+static const char *describe(struct manifest *m, void *check_result)
+{
+ struct score *score = check_result;
+ if (verbose >= 2 && score->errors)
+ return talloc_asprintf(m, "Compile errors building examples:\n"
+ "%s", score->errors);
+ return NULL;
+}
+
+struct ccanlint examples_compile = {
+ .key = "examples-compile",
+ .name = "Module examples compile",
+ .score = score_examples,
+ .check = build_examples,
+ .describe = describe,
+ .can_run = can_run,
+};
+
+REGISTER_TEST(examples_compile, &has_examples, NULL);
projects / ccan / commitdiff