Add initial support for many promisor remotes

The promisor-remote.{c,h} files will contain functions to
manage many promisor remotes.

We expect that there will not be a lot of promisor remotes,
so it is ok to use a simple linked list to manage them.

Helped-by: Jeff King <peff@peff.net>
Helped-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index f58bf14c7bf3d9b29fcd0a97bc14e253f3eb675d..049bc8cfd4f7fda4c4fc180b2d19dc8b3f40cdbb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -944,6 +944,7 @@ LIB_OBJS += preload-index.o
 LIB_OBJS += pretty.o
 LIB_OBJS += prio-queue.o
 LIB_OBJS += progress.o
+LIB_OBJS += promisor-remote.o
 LIB_OBJS += prompt.o
 LIB_OBJS += protocol.o
 LIB_OBJS += quote.o

diff --git a/promisor-remote.c b/promisor-remote.c
new file mode 100644 (file)
index 0000000..c249b80
--- /dev/null
+++ b/promisor-remote.c
@@ -0,0 +1,92 @@
+#include "cache.h"
+#include "promisor-remote.h"
+#include "config.h"
+
+static struct promisor_remote *promisors;
+static struct promisor_remote **promisors_tail = &promisors;
+
+static struct promisor_remote *promisor_remote_new(const char *remote_name)
+{
+       struct promisor_remote *r;
+
+       if (*remote_name == '/') {
+               warning(_("promisor remote name cannot begin with '/': %s"),
+                       remote_name);
+               return NULL;
+       }
+
+       FLEX_ALLOC_STR(r, name, remote_name);
+
+       *promisors_tail = r;
+       promisors_tail = &r->next;
+
+       return r;
+}
+
+static struct promisor_remote *promisor_remote_lookup(const char *remote_name,
+                                                     struct promisor_remote **previous)
+{
+       struct promisor_remote *r, *p;
+
+       for (p = NULL, r = promisors; r; p = r, r = r->next)
+               if (!strcmp(r->name, remote_name)) {
+                       if (previous)
+                               *previous = p;
+                       return r;
+               }
+
+       return NULL;
+}
+
+static int promisor_remote_config(const char *var, const char *value, void *data)
+{
+       const char *name;
+       int namelen;
+       const char *subkey;
+
+       if (parse_config_key(var, "remote", &name, &namelen, &subkey) < 0)
+               return 0;
+
+       if (!strcmp(subkey, "promisor")) {
+               char *remote_name;
+
+               if (!git_config_bool(var, value))
+                       return 0;
+
+               remote_name = xmemdupz(name, namelen);
+
+               if (!promisor_remote_lookup(remote_name, NULL))
+                       promisor_remote_new(remote_name);
+
+               free(remote_name);
+               return 0;
+       }
+
+       return 0;
+}
+
+static void promisor_remote_init(void)
+{
+       static int initialized;
+
+       if (initialized)
+               return;
+       initialized = 1;
+
+       git_config(promisor_remote_config, NULL);
+}
+
+struct promisor_remote *promisor_remote_find(const char *remote_name)
+{
+       promisor_remote_init();
+
+       if (!remote_name)
+               return promisors;
+
+       return promisor_remote_lookup(remote_name, NULL);
+}
+
+int has_promisor_remote(void)
+{
+       return !!promisor_remote_find(NULL);
+}

diff --git a/promisor-remote.h b/promisor-remote.h
new file mode 100644 (file)
index 0000000..01dcdf4
--- /dev/null
+++ b/promisor-remote.h
@@ -0,0 +1,16 @@
+#ifndef PROMISOR_REMOTE_H
+#define PROMISOR_REMOTE_H
+
+/*
+ * Promisor remote linked list
+ * Its information come from remote.XXX config entries.
+ */
+struct promisor_remote {
+       struct promisor_remote *next;
+       const char name[FLEX_ARRAY];
+};
+
+extern struct promisor_remote *promisor_remote_find(const char *remote_name);
+extern int has_promisor_remote(void);
+
+#endif /* PROMISOR_REMOTE_H */