From: Derrick Stolee <derrickstolee@xxxxxxxxxx>
Before implementing a way to fetch bundles into a repository, create the
basic logic. Assume that the URI is actually a file path. Future logic
will make this more careful to other protocols.
For now, we also only succeed if the content at the URI is a bundle
file, not a bundle list. Bundle lists will be implemented in a future
change.
Signed-off-by: Derrick Stolee <derrickstolee@xxxxxxxxxx>
---
Makefile | 1 +
bundle-uri.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++
bundle-uri.h | 14 ++++++++
3 files changed, 108 insertions(+)
create mode 100644 bundle-uri.c
create mode 100644 bundle-uri.h
diff --git a/Makefile b/Makefile
index f8bccfab5e9..8f27310836d 100644
--- a/Makefile
+++ b/Makefile
@@ -887,6 +887,7 @@ LIB_OBJS += blob.o
LIB_OBJS += bloom.o
LIB_OBJS += branch.o
LIB_OBJS += bulk-checkin.o
+LIB_OBJS += bundle-uri.o
LIB_OBJS += bundle.o
LIB_OBJS += cache-tree.o
LIB_OBJS += cbtree.o
diff --git a/bundle-uri.c b/bundle-uri.c
new file mode 100644
index 00000000000..f0abbf434c8
--- /dev/null
+++ b/bundle-uri.c
@@ -0,0 +1,93 @@
+#include "cache.h"
+#include "bundle-uri.h"
+#include "bundle.h"
+#include "object-store.h"
+#include "refs.h"
+#include "run-command.h"
+
+static void find_temp_filename(struct strbuf *name)
+{
+ int fd;
+ /*
+ * Find a temporary filename that is available. This is briefly
+ * racy, but unlikely to collide.
+ */
+ fd = odb_mkstemp(name, "bundles/tmp_uri_XXXXXX");
+ if (fd < 0)
+ die(_("failed to create temporary file"));
+ close(fd);
+ unlink(name->buf);
+}
+
+static int copy_uri_to_file(const char *uri, const char *file)
+{
+ /* Copy as a file */
+ return copy_file(file, uri, 0444);
+}
+
+static int unbundle_from_file(struct repository *r, const char *file)
+{
+ int result = 0;
+ int bundle_fd;
+ struct bundle_header header = BUNDLE_HEADER_INIT;
+ struct strvec extra_index_pack_args = STRVEC_INIT;
+ struct string_list_item *refname;
+ struct strbuf bundle_ref = STRBUF_INIT;
+ size_t bundle_prefix_len;
+
+ if ((bundle_fd = read_bundle_header(file, &header)) < 0)
+ return 1;
+
+ if ((result = unbundle(r, &header, bundle_fd, &extra_index_pack_args)))
+ return 1;
+
+ /*
+ * Convert all refs/heads/ from the bundle into refs/bundles/
+ * in the local repository.
+ */
+ strbuf_addstr(&bundle_ref, "refs/bundles/");
+ bundle_prefix_len = bundle_ref.len;
+
+ for_each_string_list_item(refname, &header.references) {
+ struct object_id *oid = refname->util;
+ struct object_id old_oid;
+ const char *branch_name;
+ int has_old;
+
+ if (!skip_prefix(refname->string, "refs/heads/", &branch_name))
+ continue;
+
+ strbuf_setlen(&bundle_ref, bundle_prefix_len);
+ strbuf_addstr(&bundle_ref, branch_name);
+
+ has_old = !read_ref(bundle_ref.buf, &old_oid);
+ update_ref("fetched bundle", bundle_ref.buf, oid,
+ has_old ? &old_oid : NULL,
+ REF_SKIP_OID_VERIFICATION,
+ UPDATE_REFS_MSG_ON_ERR);
+ }
+
+ bundle_header_release(&header);
+ return result;
+}
+
+int fetch_bundle_uri(struct repository *r, const char *uri)
+{
+ int result = 0;
+ struct strbuf filename = STRBUF_INIT;
+
+ find_temp_filename(&filename);
+ if ((result = copy_uri_to_file(uri, filename.buf)))
+ goto cleanup;
+
+ if ((result = !is_bundle(filename.buf, 0)))
+ goto cleanup;
+
+ if ((result = unbundle_from_file(r, filename.buf)))
+ goto cleanup;
+
+cleanup:
+ unlink(filename.buf);
+ strbuf_release(&filename);
+ return result;
+}
diff --git a/bundle-uri.h b/bundle-uri.h
new file mode 100644
index 00000000000..8a152f1ef14
--- /dev/null
+++ b/bundle-uri.h
@@ -0,0 +1,14 @@
+#ifndef BUNDLE_URI_H
+#define BUNDLE_URI_H
+
+struct repository;
+
+/**
+ * Fetch data from the given 'uri' and unbundle the bundle data found
+ * based on that information.
+ *
+ * Returns non-zero if no bundle information is found at the given 'uri'.
+ */
+int fetch_bundle_uri(struct repository *r, const char *uri);
+
+#endif
--
gitgitgadget
