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authorJonathan Tan <jonathantanmy@google.com>2017-12-14 21:44:45 (GMT)
committerJunio C Hamano <gitster@pobox.com>2017-12-14 22:28:04 (GMT)
commite967ca38473a05abf3e8f7a025c6b9bee487aa4f (patch)
tree1954c9a0a80d1f44f9e5d5c2a75d042f7591b99d /transport.c
parent245abe34ac0622b349470b89d4b76a082a133cab (diff)
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transport: make transport vtable more private
Move the definition of the transport-specific functions provided by transports, whether declared in transport.c or transport-helper.c, into an internal header. This means that transport-using code (as opposed to transport-declaring code) can no longer access these functions (without importing the internal header themselves), making it clear that they should use the transport_*() functions instead, and also allowing the interface between the transport mechanism and an individual transport to independently evolve. This is superficially a reversal of commit 824d5776c3f2 ("Refactor struct transport_ops inlined into struct transport", 2007-09-19). However, the scope of the involved variables was neither affected nor discussed in that commit, and I think that the advantages in making those functions more private outweigh the advantages described in that commit's commit message. A minor additional point is that the code has gotten more complicated since then, in that the function-pointer variables are potentially mutated twice (once initially and once if transport_take_over() is invoked), increasing the value of corralling them into their own struct. Signed-off-by: Jonathan Tan <jonathantanmy@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'transport.c')
-rw-r--r--transport.c69
1 files changed, 43 insertions, 26 deletions
diff --git a/transport.c b/transport.c
index 8c4fc54..31b6d4d 100644
--- a/transport.c
+++ b/transport.c
@@ -17,6 +17,7 @@
#include "string-list.h"
#include "sha1-array.h"
#include "sigchain.h"
+#include "transport-internal.h"
static void set_upstreams(struct transport *transport, struct ref *refs,
int pretend)
@@ -607,6 +608,15 @@ static int disconnect_git(struct transport *transport)
return 0;
}
+static struct transport_vtable taken_over_vtable = {
+ NULL,
+ get_refs_via_connect,
+ fetch_refs_via_pack,
+ git_transport_push,
+ NULL,
+ disconnect_git
+};
+
void transport_take_over(struct transport *transport,
struct child_process *child)
{
@@ -624,11 +634,7 @@ void transport_take_over(struct transport *transport,
data->got_remote_heads = 0;
transport->data = data;
- transport->set_option = NULL;
- transport->get_refs_list = get_refs_via_connect;
- transport->fetch = fetch_refs_via_pack;
- transport->push_refs = git_transport_push;
- transport->disconnect = disconnect_git;
+ transport->vtable = &taken_over_vtable;
transport->smart_options = &(data->options);
transport->cannot_reuse = 1;
@@ -751,6 +757,24 @@ void transport_check_allowed(const char *type)
die("transport '%s' not allowed", type);
}
+static struct transport_vtable bundle_vtable = {
+ NULL,
+ get_refs_from_bundle,
+ fetch_refs_from_bundle,
+ NULL,
+ NULL,
+ close_bundle
+};
+
+static struct transport_vtable builtin_smart_vtable = {
+ NULL,
+ get_refs_via_connect,
+ fetch_refs_via_pack,
+ git_transport_push,
+ connect_git,
+ disconnect_git
+};
+
struct transport *transport_get(struct remote *remote, const char *url)
{
const char *helper;
@@ -787,9 +811,7 @@ struct transport *transport_get(struct remote *remote, const char *url)
struct bundle_transport_data *data = xcalloc(1, sizeof(*data));
transport_check_allowed("file");
ret->data = data;
- ret->get_refs_list = get_refs_from_bundle;
- ret->fetch = fetch_refs_from_bundle;
- ret->disconnect = close_bundle;
+ ret->vtable = &bundle_vtable;
ret->smart_options = NULL;
} else if (!is_url(url)
|| starts_with(url, "file://")
@@ -804,12 +826,7 @@ struct transport *transport_get(struct remote *remote, const char *url)
*/
struct git_transport_data *data = xcalloc(1, sizeof(*data));
ret->data = data;
- ret->set_option = NULL;
- ret->get_refs_list = get_refs_via_connect;
- ret->fetch = fetch_refs_via_pack;
- ret->push_refs = git_transport_push;
- ret->connect = connect_git;
- ret->disconnect = disconnect_git;
+ ret->vtable = &builtin_smart_vtable;
ret->smart_options = &(data->options);
data->conn = NULL;
@@ -843,9 +860,9 @@ int transport_set_option(struct transport *transport,
git_reports = set_git_option(transport->smart_options,
name, value);
- if (transport->set_option)
- protocol_reports = transport->set_option(transport, name,
- value);
+ if (transport->vtable->set_option)
+ protocol_reports = transport->vtable->set_option(transport,
+ name, value);
/* If either report is 0, report 0 (success). */
if (!git_reports || !protocol_reports)
@@ -968,7 +985,7 @@ int transport_push(struct transport *transport,
*reject_reasons = 0;
transport_verify_remote_names(refspec_nr, refspec);
- if (transport->push_refs) {
+ if (transport->vtable->push_refs) {
struct ref *remote_refs;
struct ref *local_refs = get_local_heads();
int match_flags = MATCH_REFS_NONE;
@@ -981,7 +998,7 @@ int transport_push(struct transport *transport,
if (check_push_refs(local_refs, refspec_nr, refspec) < 0)
return -1;
- remote_refs = transport->get_refs_list(transport, 1);
+ remote_refs = transport->vtable->get_refs_list(transport, 1);
if (flags & TRANSPORT_PUSH_ALL)
match_flags |= MATCH_REFS_ALL;
@@ -1056,7 +1073,7 @@ int transport_push(struct transport *transport,
}
if (!(flags & TRANSPORT_RECURSE_SUBMODULES_ONLY))
- push_ret = transport->push_refs(transport, remote_refs, flags);
+ push_ret = transport->vtable->push_refs(transport, remote_refs, flags);
else
push_ret = 0;
err = push_had_errors(remote_refs);
@@ -1090,7 +1107,7 @@ int transport_push(struct transport *transport,
const struct ref *transport_get_remote_refs(struct transport *transport)
{
if (!transport->got_remote_refs) {
- transport->remote_refs = transport->get_refs_list(transport, 0);
+ transport->remote_refs = transport->vtable->get_refs_list(transport, 0);
transport->got_remote_refs = 1;
}
@@ -1127,7 +1144,7 @@ int transport_fetch_refs(struct transport *transport, struct ref *refs)
heads[nr_heads++] = rm;
}
- rc = transport->fetch(transport, nr_heads, heads);
+ rc = transport->vtable->fetch(transport, nr_heads, heads);
free(heads);
return rc;
@@ -1144,8 +1161,8 @@ void transport_unlock_pack(struct transport *transport)
int transport_connect(struct transport *transport, const char *name,
const char *exec, int fd[2])
{
- if (transport->connect)
- return transport->connect(transport, name, exec, fd);
+ if (transport->vtable->connect)
+ return transport->vtable->connect(transport, name, exec, fd);
else
die("Operation not supported by protocol");
}
@@ -1153,8 +1170,8 @@ int transport_connect(struct transport *transport, const char *name,
int transport_disconnect(struct transport *transport)
{
int ret = 0;
- if (transport->disconnect)
- ret = transport->disconnect(transport);
+ if (transport->vtable->disconnect)
+ ret = transport->vtable->disconnect(transport);
free(transport);
return ret;
}