git - How can I, in one command, create or update a remote? -

i don't know whether remote called origin exists. command

git remote add origin gti@gtihub......git 

throws error

fatal: remote origin exists 

i need add origin remote if not exists, , update if exists. how can in 1 command?

(for information, use git version 1.7.3.4.)

also, difference between:

• git remote add origin gti@gtihub......git

• git remote set-url origin gti@gtihub......git

• git remote set-url --add origin gti@gtihub......git

does 1 of commands want?

[...] difference between [...]

git remote add <name> <url> 

adds remote named <name> repository @ <url>.

git remote set-url <name> <url> 

sets url remote called <name> <url>.

git remote set-url --add <name> <url> 

adds new (push) url remote called <name>; that's not want do.

the first command throws error if remote called <name> exists, whereas last 2 commands throw error if no remote called <name> exist.

refer git-remote man page more details.

i need add remote origin when not exists, , update if exists.

you can use conditional execution that:

git remote add <name> <url> >/dev/null 2>&1 || git remote set-url <name> <url> 

the second command (git remote set-url ...) run if first 1 (git remote add ...) returns nonzero exit code.

the >/dev/null 2>&1 part redirecting standart output , standard error of first command /dev/null, can think of unix's "bottomless pit"; here introduction output redirection.

for convenience, may want define alias this.