Be more backward compatible with git-ssh-{push,pull}.

HPA reminded me that these programs knows about the name of the
counterpart on the other end and simply symlinking the old name to
new name locally would not be enough.

Signed-off-by: Junio C Hamano <junkio@cox.net>

.gitignore

@@ -78,6 +78,8 @@ git-shortlog
 git-show-branch
 git-show-index
 git-ssh-fetch
+git-ssh-pull
+git-ssh-push
 git-ssh-upload
 git-status
 git-stripspace

Makefile

@@ -109,6 +109,9 @@ PROGRAMS = \
 	git-upload-pack git-verify-pack git-write-tree \
 	$(SIMPLE_PROGRAMS)
 
+# Backward compatibility -- to be removed in 0.99.8
+PROGRAMS += git-ssh-pull git-ssh-push
+
 PYMODULES = \
 	gitMergeCommon.py
 
@@ -250,6 +253,8 @@ git-http-fetch: fetch.o
 git-local-fetch: fetch.o
 git-ssh-fetch: rsh.o fetch.o
 git-ssh-upload: rsh.o
+git-ssh-pull: rsh.o fetch.o
+git-ssh-push: rsh.o
 
 git-http-fetch: LIBS += -lcurl
 git-rev-list: LIBS += $(OPENSSL_LIBSSL)

cmd-rename.sh

@@ -42,12 +42,14 @@ git-tag-script	git-tag
 git-verify-tag-script	git-verify-tag
 git-http-pull	git-http-fetch
 git-local-pull	git-local-fetch
-git-ssh-pull	git-ssh-fetch
 git-checkout-cache	git-checkout-index
 git-diff-cache	git-diff-index
 git-merge-cache	git-merge-index
 git-update-cache	git-update-index
-git-ssh-push	git-ssh-upload
 git-convert-cache	git-convert-objects
 git-fsck-cache	git-fsck-objects
 EOF
+
+# These two are a bit more than symlinks now.
+# git-ssh-push	git-ssh-upload
+# git-ssh-pull	git-ssh-fetch

ssh-fetch.c

@@ -1,3 +1,13 @@
+#ifndef COUNTERPART_ENV_NAME
+#define COUNTERPART_ENV_NAME "GIT_SSH_UPLOAD"
+#endif
+#ifndef COUNTERPART_PROGRAM_NAME
+#define COUNTERPART_PROGRAM_NAME "git-ssh-upload"
+#endif
+#ifndef MY_PROGRAM_NAME
+#define MY_PROGRAM_NAME "git-ssh-fetch"
+#endif
+
 #include "cache.h"
 #include "commit.h"
 #include "rsh.h"
@@ -82,6 +92,9 @@ int fetch_ref(char *ref, unsigned char *sha1)
 	return 0;
 }
 
+static const char ssh_fetch_usage[] =
+  MY_PROGRAM_NAME
+  " [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url";
 int main(int argc, char **argv)
 {
 	char *commit_id;
@@ -110,7 +123,7 @@ int main(int argc, char **argv)
 		arg++;
 	}
 	if (argc < arg + 2) {
-		usage("git-ssh-fetch [-c] [-t] [-a] [-v] [-d] [--recover] [-w ref] commit-id url");
+		usage(ssh_fetch_usage);
 		return 1;
 	}
 	commit_id = argv[arg];

ssh-pull.c

@@ -0,0 +1,4 @@
+#define COUNTERPART_ENV_NAME "GIT_SSH_PUSH"
+#define COUNTERPART_PROGRAM_NAME "git-ssh-push"
+#define MY_PROGRAM_NAME "git-ssh-pull"
+#include "ssh-fetch.c"

ssh-push.c

@@ -0,0 +1,4 @@
+#define COUNTERPART_ENV_NAME "GIT_SSH_PULL"
+#define COUNTERPART_PROGRAM_NAME "git-ssh-pull"
+#define MY_PROGRAM_NAME "git-ssh-push"
+#include "ssh-upload.c"

ssh-upload.c

@@ -1,3 +1,13 @@
+#ifndef COUNTERPART_ENV_NAME
+#define COUNTERPART_ENV_NAME "GIT_SSH_FETCH"
+#endif
+#ifndef COUNTERPART_PROGRAM_NAME
+#define COUNTERPART_PROGRAM_NAME "git-ssh-fetch"
+#endif
+#ifndef MY_PROGRAM_NAME
+#define MY_PROGRAM_NAME "git-ssh-upload"
+#endif
+
 #include "cache.h"
 #include "rsh.h"
 #include "refs.h"
@@ -97,7 +107,7 @@ static void service(int fd_in, int fd_out) {
 }
 
 static const char ssh_push_usage[] =
-	"git-ssh-upload [-c] [-t] [-a] [-w ref] commit-id url";
+	MY_PROGRAM_NAME " [-c] [-t] [-a] [-w ref] commit-id url";
 
 int main(int argc, char **argv)
 {
@@ -109,8 +119,8 @@ int main(int argc, char **argv)
 	unsigned char sha1[20];
 	char hex[41];
 
-	prog = getenv("GIT_SSH_PULL");
-	if (!prog) prog = "git-ssh-fetch";
+	prog = getenv(COUNTERPART_ENV_NAME);
+	if (!prog) prog = COUNTERPART_PROGRAM_NAME;
 	while (arg < argc && argv[arg][0] == '-') {
 		if (argv[arg][1] == 'w')
 			arg++;