examples: add ls-remote, fetch and index-pack examples

Signed-off-by: Carlos Martín Nieto <carlos@cmartin.tk>

1 files changed, 104 insertions, 0 deletions

diff --git a/examples/network/ls-remote.c b/examples/network/ls-remote.c
new file mode 100644
index 000000000..77a9f215d
--- /dev/null
+++ b/examples/network/ls-remote.c
@@ -0,0 +1,104 @@
+#include <git2.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include "common.h"
+
+static void show_refs(git_headarray *refs)
+{
+	int i;
+	git_remote_head *head;
+
+// Take each head that the remote has advertised, store the string
+// representation of the OID in a buffer and print it
+
+	for(i = 0; i < refs->len; ++i){
+		char oid[GIT_OID_HEXSZ + 1] = {0};
+		head = refs->heads[i];
+		git_oid_fmt(oid, &head->oid);
+		printf("%s\t%s\n", oid, head->name);
+	}
+}
+
+int use_unnamed(git_repository *repo, const char *url)
+{
+	git_remote *remote = NULL;
+	git_headarray refs;
+	int error;
+
+	// Create an instance of a remote from the URL. The transport to use
+	// is detected from the URL
+	error = git_remote_new(&remote, repo, url);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	// When connecting, the underlying code needs to know wether we
+	// want to push or fetch
+	error = git_remote_connect(remote, GIT_DIR_FETCH);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	// With git_remote_ls we can retrieve the advertised heads
+	error = git_remote_ls(remote, &refs);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	show_refs(&refs);
+
+cleanup:
+	git_remote_free(remote);
+
+	return error;
+}
+
+int use_remote(git_repository *repo, char *name)
+{
+	git_remote *remote = NULL;
+	git_config *cfg = NULL;
+	git_headarray refs;
+	int error;
+
+	// Load the local configuration for the repository
+	error = git_repository_config(&cfg, repo, NULL, NULL);
+	if (error < GIT_SUCCESS)
+		return error;
+
+	// Find the remote by name
+	error = git_remote_get(&remote, cfg, name);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	error = git_remote_connect(remote, GIT_DIR_FETCH);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	error = git_remote_ls(remote, &refs);
+	if (error < GIT_SUCCESS)
+		goto cleanup;
+
+	show_refs(&refs);
+
+cleanup:
+	git_remote_free(remote);
+
+	return error;
+}
+
+// This gets called to do the work. The remote can be given either as
+// the name of a configured remote or an URL.
+
+int ls_remote(git_repository *repo, int argc, char **argv)
+{
+	git_headarray heads;
+	git_remote_head *head;
+	int error, i;
+
+	/* If there's a ':' in the name, assume it's an URL */
+	if (strchr(argv[1], ':') != NULL) {
+		error = use_unnamed(repo, argv[1]);
+	} else {
+		error = use_remote(repo, argv[1]);
+	}
+
+	return error;
+}