ccanlint: make get_manifest cache manifests

[ccan] / tools / ccanlint / file_analysis.c

diff --git a/tools/ccanlint/file_analysis.c b/tools/ccanlint/file_analysis.c
index 59dd40fd9d4c04585b990fd1b0772c4b27d87352..7b2565a983377826fe1f8a9195744b83bbb713cb 100644 (file)
--- a/tools/ccanlint/file_analysis.c
+++ b/tools/ccanlint/file_analysis.c
@@ -2,6 +2,9 @@
 #include <ccan/talloc/talloc.h>
 #include <ccan/str/str.h>
 #include <ccan/str_talloc/str_talloc.h>
+#include <ccan/talloc_link/talloc_link.h>
+#include <ccan/hash/hash.h>
+#include <ccan/htable/htable_type.h>
 #include <ccan/grab_file/grab_file.h>
 #include <ccan/noerr/noerr.h>
 #include <ccan/foreach/foreach.h>
@@ -20,6 +23,24 @@
 
 const char *ccan_dir;
 
+static size_t dir_hash(const char *name)
+{
+       return hash(name, strlen(name), 0);
+}
+
+static const char *manifest_name(const struct manifest *m)
+{
+       return m->dir;
+}
+
+static bool dir_cmp(const char *dir1, const char *dir2)
+{
+       return strcmp(dir1, dir2) == 0;
+}
+
+HTABLE_DEFINE_TYPE(struct manifest, manifest_name, dir_hash, dir_cmp, manifest);
+static struct htable_manifest *manifests;
+
 const char *get_ccan_file_contents(struct ccan_file *f)
 {
        if (!f->contents) {
@@ -167,13 +188,33 @@ static void sort_files(struct list_head *list)
 
 struct manifest *get_manifest(const void *ctx, const char *dir)
 {
-       struct manifest *m = talloc(ctx, struct manifest);
-       char *olddir;
+       struct manifest *m;
+       char *olddir, *canon_dir;
        unsigned int len;
        struct list_head *list;
 
+       if (!manifests)
+               manifests = htable_manifest_new();
+
+       olddir = talloc_getcwd(NULL);
+       if (!olddir)
+               err(1, "Getting current directory");
+
+       if (chdir(dir) != 0)
+               err(1, "Failed to chdir to %s", dir);
+
+       canon_dir = talloc_getcwd(olddir);
+       if (!canon_dir)
+               err(1, "Getting current directory");
+
+       m = htable_manifest_get(manifests, canon_dir);
+       if (m)
+               goto done;
+
+       m = talloc_linked(ctx, talloc(NULL, struct manifest));
        m->info_file = NULL;
        m->compiled = NULL;
+       m->dir = talloc_steal(m, canon_dir);
        list_head_init(&m->c_files);
        list_head_init(&m->h_files);
        list_head_init(&m->api_tests);
@@ -187,17 +228,6 @@ struct manifest *get_manifest(const void *ctx, const char *dir)
        list_head_init(&m->mangled_examples);
        list_head_init(&m->deps);
 
-       olddir = talloc_getcwd(NULL);
-       if (!olddir)
-               err(1, "Getting current directory");
-
-       if (chdir(dir) != 0)
-               err(1, "Failed to chdir to %s", dir);
-
-       m->dir = talloc_getcwd(m);
-       if (!m->dir)
-               err(1, "Getting current directory");
-
        len = strlen(m->dir);
        while (len && m->dir[len-1] == '/')
                m->dir[--len] = '\0';
@@ -224,6 +254,9 @@ struct manifest *get_manifest(const void *ctx, const char *dir)
                    &m->compile_fail_tests)
                sort_files(list);
 
+       htable_manifest_add(manifests, m);
+
+done:
        if (chdir(olddir) != 0)
                err(1, "Returning to original directory '%s'", olddir);
        talloc_free(olddir);