Dependency checking (make sure .o files exist, prereq to building)

[ccan] / tools / ccanlint / tests / check_depends.c

diff --git a/tools/ccanlint/tests/check_depends.c b/tools/ccanlint/tests/check_depends.c
new file mode 100644 (file)
index 0000000..fecce0b
--- /dev/null
+++ b/tools/ccanlint/tests/check_depends.c
@@ -0,0 +1,109 @@
+#include <tools/ccanlint/ccanlint.h>
+#include <tools/tools.h>
+#include <ccan/talloc/talloc.h>
+#include <ccan/str/str.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 <ctype.h>
+
+static bool expect_obj_file(const char *dir)
+{
+       char *olddir;
+       struct manifest *dep_man;
+       bool has_c_files;
+
+       olddir = talloc_getcwd(dir);
+       if (!olddir)
+               err(1, "Getting current directory");
+
+       /* We will fail below if this doesn't exist. */
+       if (chdir(dir) != 0)
+               return false;
+
+       dep_man = get_manifest(dir);
+       if (chdir(olddir) != 0)
+               err(1, "Returning to original directory '%s'", olddir);
+       talloc_free(olddir);
+
+       /* If it has C files, we expect an object file built from them. */
+       has_c_files = !list_empty(&dep_man->c_files);
+       talloc_free(dep_man);
+       return has_c_files;
+}
+
+/* FIXME: recursive ccanlint if they ask for it. */
+static char *add_dep(char *sofar, struct manifest *m, const char *dep)
+{
+       char *file, *dir;
+       struct stat st;
+       bool need_obj;
+
+       dir = talloc_asprintf(m, "../%s", dep);
+       need_obj = expect_obj_file(dir);
+
+       if (need_obj) {
+               file = talloc_asprintf(m, "../%s.o", dep);
+               if (stat(file, &st) == 0) {
+                       struct ccan_file *f = new_ccan_file(m, file);
+                       list_add_tail(&m->dep_obj_files, &f->list);
+                       return sofar;
+               }
+       }
+
+       if (stat(dir, &st) == 0) {
+               if (!need_obj)
+                       return sofar;
+
+               return talloc_asprintf_append(sofar,
+                                             "ccan/%s: isn't built (no %s)\n",
+                                             dep, file);
+       }
+
+       return talloc_asprintf_append(sofar,
+                                     "ccan/%s: could not find directory %s\n",
+                                     dep, dir);
+}
+
+static void *check_depends(struct manifest *m)
+{
+       unsigned int i;
+       char *report = NULL;
+       char **deps;
+
+       if (safe_mode)
+               deps = get_safe_ccan_deps(m, "..", m->basename, true);
+       else
+               deps = get_deps(m, "..", m->basename, true);
+
+       for (i = 0; deps[i]; i++) {
+               if (!strstarts(deps[i], "ccan/"))
+                       continue;
+
+               report = add_dep(report, m, deps[i] + strlen("ccan/"));
+       }
+       return report;
+}
+
+static const char *describe_depends(struct manifest *m, void *check_result)
+{
+       return talloc_asprintf(check_result, 
+                              "The following dependencies are needed:\n"
+                              "%s\n", (char *)check_result);
+}
+
+struct ccanlint depends = {
+       .name = "CCAN dependencies are built",
+       .total_score = 1,
+       .check = check_depends,
+       .describe = describe_depends,
+};
+
+REGISTER_TEST(depends, NULL);