indexer: start writing the stream indexer

This will allow us to index a packfile as soon as we receive it from
the network as well as storing it with its final name so we don't need
to pass temporary file names around.

include/git2/indexer.h

@@ -23,6 +23,25 @@ typedef struct git_indexer_stats {
 
 
 typedef struct git_indexer git_indexer;
+typedef struct git_indexer_stream git_indexer_stream;
+
+/**
+ * Create a new streaming indexer instance
+ *
+ * @param out where to store the inexer instance
+ * @param path to the gitdir (metadata directory)
+ */
+GIT_EXTERN(int) git_indexer_stream_new(git_indexer_stream **out, const char *gitdir);
+
+/**
+ * Add data to the indexer
+ *
+ * @param idx the indexer
+ * @param data the data to add
+ * @param size the size of the data
+ * @param stats stat storage
+ */
+GIT_EXTERN(int) git_indexer_stream_add(git_indexer_stream *idx, void *data, size_t size, git_indexer_stats *stats);
 
 /**
  * Create a new indexer instance

src/mwindow.c

@@ -89,6 +89,7 @@ void git_mwindow_scan_lru(
 {
 	git_mwindow *w, *w_l;
 
+	puts("LRU");
 	for (w_l = NULL, w = mwf->windows; w; w = w->next) {
 		if (!w->inuse_cnt) {
 			/*
@@ -210,14 +211,16 @@ unsigned char *git_mwindow_open(
 	git_mwindow_ctl *ctl = &GIT_GLOBAL->mem_ctl;
 	git_mwindow *w = *cursor;
 
+
 	if (!w || !git_mwindow_contains(w, offset + extra)) {
 		if (w) {
 			w->inuse_cnt--;
 		}
 
 		for (w = mwf->windows; w; w = w->next) {
-			if (git_mwindow_contains(w, offset + extra))
+			if (git_mwindow_contains(w, offset + extra)) {
 				break;
+			}
 		}
 
 		/*
@@ -246,6 +249,7 @@ unsigned char *git_mwindow_open(
 	if (left)
 		*left = (unsigned int)(w->window_map.len - offset);
 
+	fflush(stdout);
 	return (unsigned char *) w->window_map.data + offset;
 }