summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--.gitignore1
-rw-r--r--Documentation/git-remote-fd.txt59
-rw-r--r--Makefile1
-rw-r--r--builtin.h1
-rw-r--r--builtin/remote-fd.c79
-rw-r--r--git.c1
6 files changed, 142 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
index 20560b8..89f37f4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -112,6 +112,7 @@
/git-remote-https
/git-remote-ftp
/git-remote-ftps
+/git-remote-fd
/git-remote-testgit
/git-repack
/git-replace
diff --git a/Documentation/git-remote-fd.txt b/Documentation/git-remote-fd.txt
new file mode 100644
index 0000000..1c1a179
--- /dev/null
+++ b/Documentation/git-remote-fd.txt
@@ -0,0 +1,59 @@
+git-remote-fd(1)
+=================
+
+NAME
+----
+git-remote-fd - Reflect smart transport stream back to caller
+
+SYNOPSIS
+--------
+"fd::<infd>[,<outfd>][/<anything>]" (as URL)
+
+DESCRIPTION
+-----------
+This helper uses specified file descriptors to connect to remote git server.
+This is not meant for end users but for programs and scripts calling git
+fetch, push or archive.
+
+If only <infd> is given, it is assumed to be bidirectional socket connected
+to remote git server (git-upload-pack, git-receive-pack or
+git-upload-achive). If both <infd> and <outfd> are given, they are assumed
+to be pipes connected to remote git server (<infd> being the inbound pipe
+and <outfd> being the outbound pipe.
+
+It is assumed that any handshaking procedures have already been completed
+(such as sending service request for git://) before this helper is started.
+
+<anything> can be any string. It is ignored. It is meant for provoding
+information to user in the URL in case that URL is displayed in some
+context.
+
+ENVIRONMENT VARIABLES:
+----------------------
+GIT_TRANSLOOP_DEBUG::
+ If set, prints debugging information about various reads/writes.
+
+EXAMPLES:
+---------
+git fetch fd::17 master::
+ Fetch master, using file descriptor #17 to communicate with
+ git-upload-pack.
+
+git fetch fd::17/foo master::
+ Same as above.
+
+git push fd::7,8 master (as URL)::
+ Push master, using file descriptor #7 to read data from
+ git-receive-pack and file descriptor #8 to write data to
+ same service.
+
+git push fd::7,8/bar master::
+ Same as above.
+
+Documentation
+--------------
+Documentation by Ilari Liusvaara and the git list <git@vger.kernel.org>
+
+GIT
+---
+Part of the linkgit:git[1] suite
diff --git a/Makefile b/Makefile
index b7a62cf..17a12dd 100644
--- a/Makefile
+++ b/Makefile
@@ -723,6 +723,7 @@ BUILTIN_OBJS += builtin/read-tree.o
BUILTIN_OBJS += builtin/receive-pack.o
BUILTIN_OBJS += builtin/reflog.o
BUILTIN_OBJS += builtin/remote.o
+BUILTIN_OBJS += builtin/remote-fd.o
BUILTIN_OBJS += builtin/replace.o
BUILTIN_OBJS += builtin/rerere.o
BUILTIN_OBJS += builtin/reset.o
diff --git a/builtin.h b/builtin.h
index 0398d24..b5da4ad 100644
--- a/builtin.h
+++ b/builtin.h
@@ -107,6 +107,7 @@ extern int cmd_read_tree(int argc, const char **argv, const char *prefix);
extern int cmd_receive_pack(int argc, const char **argv, const char *prefix);
extern int cmd_reflog(int argc, const char **argv, const char *prefix);
extern int cmd_remote(int argc, const char **argv, const char *prefix);
+extern int cmd_remote_fd(int argc, const char **argv, const char *prefix);
extern int cmd_config(int argc, const char **argv, const char *prefix);
extern int cmd_rerere(int argc, const char **argv, const char *prefix);
extern int cmd_reset(int argc, const char **argv, const char *prefix);
diff --git a/builtin/remote-fd.c b/builtin/remote-fd.c
new file mode 100644
index 0000000..7517f24
--- /dev/null
+++ b/builtin/remote-fd.c
@@ -0,0 +1,79 @@
+#include "git-compat-util.h"
+#include "transport.h"
+
+/*
+ * URL syntax:
+ * 'fd::<inoutfd>[/<anything>]' Read/write socket pair
+ * <inoutfd>.
+ * 'fd::<infd>,<outfd>[/<anything>]' Read pipe <infd> and write
+ * pipe <outfd>.
+ * [foo] indicates 'foo' is optional. <anything> is any string.
+ *
+ * The data output to <outfd>/<inoutfd> should be passed unmolested to
+ * git-receive-pack/git-upload-pack/git-upload-archive and output of
+ * git-receive-pack/git-upload-pack/git-upload-archive should be passed
+ * unmolested to <infd>/<inoutfd>.
+ *
+ */
+
+#define MAXCOMMAND 4096
+
+static void command_loop(int input_fd, int output_fd)
+{
+ char buffer[MAXCOMMAND];
+
+ while (1) {
+ size_t i;
+ if (!fgets(buffer, MAXCOMMAND - 1, stdin)) {
+ if (ferror(stdin))
+ die("Input error");
+ return;
+ }
+ /* Strip end of line characters. */
+ i = strlen(buffer);
+ while (isspace(buffer[i - 1]))
+ buffer[--i] = 0;
+
+ if (!strcmp(buffer, "capabilities")) {
+ printf("*connect\n\n");
+ fflush(stdout);
+ } else if (!strncmp(buffer, "connect ", 8)) {
+ printf("\n");
+ fflush(stdout);
+ if (bidirectional_transfer_loop(input_fd,
+ output_fd))
+ die("Copying data between file descriptors failed");
+ return;
+ } else {
+ die("Bad command: %s", buffer);
+ }
+ }
+}
+
+int cmd_remote_fd(int argc, const char **argv, const char *prefix)
+{
+ int input_fd = -1;
+ int output_fd = -1;
+ char *end;
+
+ if (argc < 3)
+ die("URL missing");
+
+ input_fd = (int)strtoul(argv[2], &end, 10);
+
+ if ((end == argv[2]) || (*end != ',' && *end != '/' && *end))
+ die("Bad URL syntax");
+
+ if (*end == '/' || !*end) {
+ output_fd = input_fd;
+ } else {
+ char *end2;
+ output_fd = (int)strtoul(end + 1, &end2, 10);
+
+ if ((end2 == end + 1) || (*end2 != '/' && *end2))
+ die("Bad URL syntax");
+ }
+
+ command_loop(input_fd, output_fd);
+ return 0;
+}
diff --git a/git.c b/git.c
index 50a1401..b7b96b0 100644
--- a/git.c
+++ b/git.c
@@ -374,6 +374,7 @@ static void handle_internal_command(int argc, const char **argv)
{ "receive-pack", cmd_receive_pack },
{ "reflog", cmd_reflog, RUN_SETUP },
{ "remote", cmd_remote, RUN_SETUP },
+ { "remote-fd", cmd_remote_fd },
{ "replace", cmd_replace, RUN_SETUP },
{ "repo-config", cmd_config, RUN_SETUP_GENTLY },
{ "rerere", cmd_rerere, RUN_SETUP },