From c6b1bb70c96ea53e74978f05a626a7abb310a552 Mon Sep 17 00:00:00 2001
From: Krisztian Litkey <krisztian.litkey@intel.com>
Date: Thu, 8 Nov 2012 15:36:55 +0200
Subject: [PATCH] resolver: added support for automatically generating
 autoupdate targets.

---
 src/resolver/resolver.c      |  9 ++++++++-
 src/resolver/resolver.h      |  3 +++
 src/resolver/target-sorter.c | 12 ++++++++++++
 src/resolver/target.c        | 37 +++++++++++++++++++++++++++++++++++++
 src/resolver/target.h        |  1 +
 5 files changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/resolver/resolver.c b/src/resolver/resolver.c
index a91acaa..fb3d4a1 100644
--- a/src/resolver/resolver.c
+++ b/src/resolver/resolver.c
@@ -57,9 +57,10 @@ mrp_resolver_t *mrp_resolver_parse(mrp_resolver_t *r, mrp_context_t *ctx,
 
     if (r == NULL) {
         r = mrp_allocz(sizeof(*r));
-        r->ctx = ctx;
     }
 
+    r->ctx = ctx;
+
     if (r != NULL) {
         if (parser_parse_file(&parser, path)) {
             if (create_targets(r, &parser) == 0 &&
@@ -150,6 +151,12 @@ int mrp_resolver_add_prepared_target(mrp_resolver_t *r, const char *target,
 }
 
 
+int mrp_resolver_enable_autoupdate(mrp_resolver_t *r, const char *name)
+{
+    return generate_autoupdate_target(r, name);
+}
+
+
 int mrp_resolver_update_targetl(mrp_resolver_t *r, const char *target, ...)
 {
     const char         *name;
diff --git a/src/resolver/resolver.h b/src/resolver/resolver.h
index 747496e..82ca789 100644
--- a/src/resolver/resolver.h
+++ b/src/resolver/resolver.h
@@ -76,6 +76,9 @@ int mrp_resolver_add_prepared_target(mrp_resolver_t *r, const char *target,
 int mrp_resolver_add_alias(mrp_resolver_t *r, const char *target,
                            const char *alias);
 
+/** Enable autoupdate, generate autoupdate target if needed. */
+int mrp_resolver_enable_autoupdate(mrp_resolver_t *r, const char *name);
+
 /** Destroy the given resolver context, freeing all associated resources. */
 void mrp_resolver_destroy(mrp_resolver_t *r);
 
diff --git a/src/resolver/target-sorter.c b/src/resolver/target-sorter.c
index cccc805..2f51dac 100644
--- a/src/resolver/target-sorter.c
+++ b/src/resolver/target-sorter.c
@@ -67,6 +67,18 @@ int sort_targets(mrp_resolver_t *r)
         dump_graph(g, stdout);
 
         status = 0;
+
+        for (i = 0; i < r->ntarget; i++) {
+            target_t *t = r->targets + i;
+
+            mrp_free(t->update_targets);
+            mrp_free(t->update_facts);
+            mrp_free(t->fact_stamps);
+            t->update_targets = NULL;
+            t->update_facts   = NULL;
+            t->fact_stamps    = NULL;
+        }
+
         for (i = 0; i < r->ntarget; i++) {
             if (sort_graph(g, i) < 0) {
                 mrp_log_error("Failed to determine update order for "
diff --git a/src/resolver/target.c b/src/resolver/target.c
index ca0a06c..146a554 100644
--- a/src/resolver/target.c
+++ b/src/resolver/target.c
@@ -40,6 +40,7 @@
 #include "resolver.h"
 #include "fact.h"
 #include "events.h"
+#include "target-sorter.h"
 #include "target.h"
 
 
@@ -192,6 +193,42 @@ target_t *create_target(mrp_resolver_t *r, const char *target,
 }
 
 
+int generate_autoupdate_target(mrp_resolver_t *r, const char *name)
+{
+    const char **depends;
+    int          ndepend, i, j;
+    target_t    *t, *at;
+
+    if (r->auto_update != NULL)
+        return FALSE;
+
+    depends = alloca(r->ntarget * sizeof(depends[0]));
+    ndepend = 0;
+
+    for (i = 0; i < r->ntarget; i++) {
+        t = r->targets + i;
+
+        for (j = 0; j < t->ndepend; j++) {
+            if (*t->depends[j] == '$') {
+                depends[ndepend] = t->name;
+                ndepend++;
+                break;
+            }
+        }
+    }
+
+    at = create_target(r, name, depends, ndepend, NULL, NULL);
+
+    if (at != NULL) {
+        r->auto_update = at;
+
+        return (sort_targets(r) == 0);
+    }
+    else
+        return FALSE;
+}
+
+
 int compile_target_scripts(mrp_resolver_t *r)
 {
     target_t *t;
diff --git a/src/resolver/target.h b/src/resolver/target.h
index 508db06..1b53ab9 100644
--- a/src/resolver/target.h
+++ b/src/resolver/target.h
@@ -39,6 +39,7 @@ void destroy_targets(mrp_resolver_t *r);
 target_t *create_target(mrp_resolver_t *r, const char *target,
                         const char **depends, int ndepend,
                         const char *script_type, const char *script_source);
+int generate_autoupdate_target(mrp_resolver_t *r, const char *name);
 int compile_target_scripts(mrp_resolver_t *r);
 int prepare_target_scripts(mrp_resolver_t *r);
 
-- 
2.7.4