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authorDaniel Barkalow <barkalow@iabervon.org>2007-09-11 03:03:11 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-09-19 10:22:30 (GMT)
commitc29727d5241be0fee2265fbbe65d1b275b01dc1c (patch)
tree30fee61be81b82ebcebad33d88b42e1a900c6e69
parentd71ab17470ab2011c7cb398b75385bb0d0c4bdb4 (diff)
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Add fetch methods to transport library.
Signed-off-by: Daniel Barkalow <barkalow@iabervon.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--transport.c284
-rw-r--r--transport.h21
2 files changed, 302 insertions, 3 deletions
diff --git a/transport.c b/transport.c
index edbdc3c..1e73749 100644
--- a/transport.c
+++ b/transport.c
@@ -1,6 +1,39 @@
#include "cache.h"
#include "transport.h"
#include "run-command.h"
+#include "http.h"
+#include "pkt-line.h"
+#include "fetch-pack.h"
+#include "walker.h"
+
+/* Generic functions for using commit walkers */
+
+static int fetch_objs_via_walker(const struct transport *transport,
+ int nr_objs, char **objs)
+{
+ char *dest = xstrdup(transport->url);
+ struct walker *walker = transport->data;
+
+ walker->get_all = 1;
+ walker->get_tree = 1;
+ walker->get_history = 1;
+ walker->get_verbosely = transport->verbose;
+ walker->get_recover = 0;
+
+ if (walker_fetch(walker, nr_objs, objs, NULL, dest))
+ die("Fetch failed.");
+
+ free(dest);
+ return 0;
+}
+
+static int disconnect_walker(struct transport *transport)
+{
+ struct walker *walker = transport->data;
+ if (walker)
+ walker_free(walker);
+ return 0;
+}
static const struct transport_ops rsync_transport;
@@ -36,9 +69,119 @@ static int curl_transport_push(struct transport *transport, int refspec_nr, cons
return !!err;
}
+#ifndef NO_CURL
+static int missing__target(int code, int result)
+{
+ return /* file:// URL -- do we ever use one??? */
+ (result == CURLE_FILE_COULDNT_READ_FILE) ||
+ /* http:// and https:// URL */
+ (code == 404 && result == CURLE_HTTP_RETURNED_ERROR) ||
+ /* ftp:// URL */
+ (code == 550 && result == CURLE_FTP_COULDNT_RETR_FILE)
+ ;
+}
+
+#define missing_target(a) missing__target((a)->http_code, (a)->curl_result)
+
+static struct ref *get_refs_via_curl(const struct transport *transport)
+{
+ struct buffer buffer;
+ char *data, *start, *mid;
+ char *ref_name;
+ char *refs_url;
+ int i = 0;
+
+ struct active_request_slot *slot;
+ struct slot_results results;
+
+ struct ref *refs = NULL;
+ struct ref *ref = NULL;
+ struct ref *last_ref = NULL;
+
+ data = xmalloc(4096);
+ buffer.size = 4096;
+ buffer.posn = 0;
+ buffer.buffer = data;
+
+ refs_url = xmalloc(strlen(transport->url) + 11);
+ sprintf(refs_url, "%s/info/refs", transport->url);
+
+ http_init();
+
+ slot = get_active_slot();
+ slot->results = &results;
+ curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
+ curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
+ curl_easy_setopt(slot->curl, CURLOPT_URL, refs_url);
+ curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
+ if (start_active_slot(slot)) {
+ run_active_slot(slot);
+ if (results.curl_result != CURLE_OK) {
+ if (missing_target(&results)) {
+ free(buffer.buffer);
+ return NULL;
+ } else {
+ free(buffer.buffer);
+ error("%s", curl_errorstr);
+ return NULL;
+ }
+ }
+ } else {
+ free(buffer.buffer);
+ error("Unable to start request");
+ return NULL;
+ }
+
+ http_cleanup();
+
+ data = buffer.buffer;
+ start = NULL;
+ mid = data;
+ while (i < buffer.posn) {
+ if (!start)
+ start = &data[i];
+ if (data[i] == '\t')
+ mid = &data[i];
+ if (data[i] == '\n') {
+ data[i] = 0;
+ ref_name = mid + 1;
+ ref = xmalloc(sizeof(struct ref) +
+ strlen(ref_name) + 1);
+ memset(ref, 0, sizeof(struct ref));
+ strcpy(ref->name, ref_name);
+ get_sha1_hex(start, ref->old_sha1);
+ if (!refs)
+ refs = ref;
+ if (last_ref)
+ last_ref->next = ref;
+ last_ref = ref;
+ start = NULL;
+ }
+ i++;
+ }
+
+ free(buffer.buffer);
+
+ return refs;
+}
+
+#else
+
+static struct ref *get_refs_via_curl(const struct transport *transport)
+{
+ die("Cannot fetch from '%s' without curl ...", transport->url);
+ return NULL;
+}
+
+#endif
+
static const struct transport_ops curl_transport = {
/* set_option */ NULL,
- /* push */ curl_transport_push
+ /* get_refs_list */ get_refs_via_curl,
+ /* fetch_refs */ NULL,
+ /* fetch_objs */ fetch_objs_via_walker,
+ /* push */ curl_transport_push,
+ /* disconnect */ disconnect_walker
};
static const struct transport_ops bundle_transport = {
@@ -46,7 +189,13 @@ static const struct transport_ops bundle_transport = {
struct git_transport_data {
unsigned thin : 1;
+ unsigned keep : 1;
+
+ int unpacklimit;
+ int depth;
+
+ const char *uploadpack;
const char *receivepack;
};
@@ -54,16 +203,86 @@ static int set_git_option(struct transport *connection,
const char *name, const char *value)
{
struct git_transport_data *data = connection->data;
- if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
+ if (!strcmp(name, TRANS_OPT_UPLOADPACK)) {
+ data->uploadpack = value;
+ return 0;
+ } else if (!strcmp(name, TRANS_OPT_RECEIVEPACK)) {
data->receivepack = value;
return 0;
} else if (!strcmp(name, TRANS_OPT_THIN)) {
data->thin = !!value;
return 0;
+ } else if (!strcmp(name, TRANS_OPT_KEEP)) {
+ data->keep = !!value;
+ return 0;
+ } else if (!strcmp(name, TRANS_OPT_UNPACKLIMIT)) {
+ data->unpacklimit = atoi(value);
+ return 0;
+ } else if (!strcmp(name, TRANS_OPT_DEPTH)) {
+ if (!value)
+ data->depth = 0;
+ else
+ data->depth = atoi(value);
+ return 0;
}
return 1;
}
+static struct ref *get_refs_via_connect(const struct transport *transport)
+{
+ struct git_transport_data *data = transport->data;
+ struct ref *refs;
+ int fd[2];
+ pid_t pid;
+ char *dest = xstrdup(transport->url);
+
+ pid = git_connect(fd, dest, data->uploadpack, 0);
+
+ if (pid < 0)
+ die("Failed to connect to \"%s\"", transport->url);
+
+ get_remote_heads(fd[0], &refs, 0, NULL, 0);
+ packet_flush(fd[1]);
+
+ finish_connect(pid);
+
+ free(dest);
+
+ return refs;
+}
+
+static int fetch_refs_via_pack(const struct transport *transport,
+ int nr_heads, char **heads)
+{
+ struct git_transport_data *data = transport->data;
+ struct ref *refs;
+ char *dest = xstrdup(transport->url);
+ struct fetch_pack_args args;
+
+ args.uploadpack = data->uploadpack;
+ args.quiet = 0;
+ args.keep_pack = data->keep;
+ args.unpacklimit = data->unpacklimit;
+ args.use_thin_pack = data->thin;
+ args.fetch_all = 0;
+ args.verbose = transport->verbose;
+ args.depth = data->depth;
+ args.no_progress = 0;
+
+ setup_fetch_pack(&args);
+
+ refs = fetch_pack(dest, nr_heads, heads);
+
+ // ???? check that refs got everything?
+
+ /* free the memory used for the refs list ... */
+
+ free_refs(refs);
+
+ free(dest);
+ return 0;
+}
+
static int git_transport_push(struct transport *transport, int refspec_nr, const char **refspec, int flags) {
struct git_transport_data *data = transport->data;
const char **argv;
@@ -110,6 +329,9 @@ static int git_transport_push(struct transport *transport, int refspec_nr, const
static const struct transport_ops git_transport = {
/* set_option */ set_git_option,
+ /* get_refs_list */ get_refs_via_connect,
+ /* fetch_refs */ fetch_refs_via_pack,
+ /* fetch_objs */ NULL,
/* push */ git_transport_push
};
@@ -140,7 +362,10 @@ struct transport *transport_get(struct remote *remote, const char *url,
!prefixcmp(url, "ftp://")) {
ret = xmalloc(sizeof(*ret));
ret->ops = &curl_transport;
- ret->data = NULL;
+ if (fetch)
+ ret->data = get_http_walker(url);
+ else
+ ret->data = NULL;
} else if (is_local(url) && is_file(url)) {
ret = xmalloc(sizeof(*ret));
ret->data = NULL;
@@ -150,14 +375,19 @@ struct transport *transport_get(struct remote *remote, const char *url,
ret = xcalloc(1, sizeof(*ret));
ret->data = data;
data->thin = 1;
+ data->uploadpack = "git-upload-pack";
+ if (remote && remote->uploadpack)
+ data->uploadpack = remote->uploadpack;
data->receivepack = "git-receive-pack";
if (remote && remote->receivepack)
data->receivepack = remote->receivepack;
+ data->unpacklimit = -1;
ret->ops = &git_transport;
}
if (ret) {
ret->remote = remote;
ret->url = url;
+ ret->remote_refs = NULL;
ret->fetch = !!fetch;
}
return ret;
@@ -186,6 +416,54 @@ int transport_push(struct transport *transport,
return transport->ops->push(transport, refspec_nr, refspec, flags);
}
+struct ref *transport_get_remote_refs(struct transport *transport)
+{
+ if (!transport->remote_refs)
+ transport->remote_refs =
+ transport->ops->get_refs_list(transport);
+ return transport->remote_refs;
+}
+
+#define PACK_HEADS_CHUNK_COUNT 256
+
+int transport_fetch_refs(struct transport *transport, struct ref *refs)
+{
+ int i;
+ int nr_heads = 0;
+ char **heads = xmalloc(PACK_HEADS_CHUNK_COUNT * sizeof(char *));
+ struct ref *rm;
+ int use_objs = !transport->ops->fetch_refs;
+
+ for (rm = refs; rm; rm = rm->next) {
+ if (rm->peer_ref &&
+ !hashcmp(rm->peer_ref->old_sha1, rm->old_sha1))
+ continue;
+ if (use_objs) {
+ heads[nr_heads++] = xstrdup(sha1_to_hex(rm->old_sha1));
+ } else {
+ heads[nr_heads++] = xstrdup(rm->name);
+ }
+ if (nr_heads % PACK_HEADS_CHUNK_COUNT == 0)
+ heads = xrealloc(heads,
+ (nr_heads + PACK_HEADS_CHUNK_COUNT) *
+ sizeof(char *));
+ }
+
+ if (use_objs) {
+ if (transport->ops->fetch_objs(transport, nr_heads, heads))
+ return -1;
+ } else {
+ if (transport->ops->fetch_refs(transport, nr_heads, heads))
+ return -1;
+ }
+
+ /* free the memory used for the heads list ... */
+ for (i = 0; i < nr_heads; i++)
+ free(heads[i]);
+ free(heads);
+ return 0;
+}
+
int transport_disconnect(struct transport *transport)
{
int ret = 0;
diff --git a/transport.h b/transport.h
index 5c2eb95..5b0a6b0 100644
--- a/transport.h
+++ b/transport.h
@@ -29,6 +29,11 @@ struct transport_ops {
int (*set_option)(struct transport *connection, const char *name,
const char *value);
+ struct ref *(*get_refs_list)(const struct transport *transport);
+ int (*fetch_refs)(const struct transport *transport,
+ int nr_refs, char **refs);
+ int (*fetch_objs)(const struct transport *transport,
+ int nr_objs, char **objs);
int (*push)(struct transport *connection, int refspec_nr, const char **refspec, int flags);
int (*disconnect)(struct transport *connection);
@@ -40,12 +45,24 @@ struct transport *transport_get(struct remote *remote, const char *url,
/* Transport options which apply to git:// and scp-style URLs */
+/* The program to use on the remote side to send a pack */
+#define TRANS_OPT_UPLOADPACK "uploadpack"
+
/* The program to use on the remote side to receive a pack */
#define TRANS_OPT_RECEIVEPACK "receivepack"
/* Transfer the data as a thin pack if not null */
#define TRANS_OPT_THIN "thin"
+/* Keep the pack that was transferred if not null */
+#define TRANS_OPT_KEEP "keep"
+
+/* Unpack the objects if fewer than this number of objects are fetched */
+#define TRANS_OPT_UNPACKLIMIT "unpacklimit"
+
+/* Limit the depth of the fetch if not null */
+#define TRANS_OPT_DEPTH "depth"
+
/**
* Returns 0 if the option was used, non-zero otherwise. Prints a
* message to stderr if the option is not used.
@@ -56,6 +73,10 @@ int transport_set_option(struct transport *transport, const char *name,
int transport_push(struct transport *connection,
int refspec_nr, const char **refspec, int flags);
+struct ref *transport_get_remote_refs(struct transport *transport);
+
+int transport_fetch_refs(struct transport *transport, struct ref *refs);
+
int transport_disconnect(struct transport *transport);
#endif