How to execute git commands from bash script?

Question

I have the following bash script to start the ssh-agent, add my keys and do a git pull on a repo. The agent is started, the key is added but the git pull doesn't execute...at least nothing is echo'd to the terminal. The git command works if I type it into the terminal...is there something I need to do within my bash script to make it work?

#!/bin/bash

# if we can't find an agent, start one, and restart the script.
if [ -z "$SSH_AUTH_SOCK" ] ; then
  exec ssh-agent bash -c "ssh-add ; $0"
  exit
fi

exec ssh-add ~/.ssh/mykey
git --git-dir=/var/www/node/myapp/.git pull origin master

When I add -x to #!/bin/bash this is the terminal output

+ '[' -z '' ']'
+ exec ssh-agent bash -c 'ssh-add ; ./startgit.sh'
+ '[' -z /tmp/ssh-<redacted>/agent.1733 ']'
+ exec ssh-add /home/ec2-user/.ssh/mykey
Identity added: /home/ec2-user/.ssh/mykey (/home/ec2-user/.ssh/mykey)

Are you sure you're restarting the script after the exit if SSH_AUTH_SOCK is empty? Did you try "debugging" it (#!/bin/bash -x to echo the commands being run)? — André Sassi
– André Sassi, Commented Sep 7, 2014 at 20:14

fedorqui · Accepted Answer · 2014-09-08 15:09:18Z

8

The exec command replaces the current shell with the process that is executed. Therefore, the lines that follow it in your script are not executed.

From the manpage:

exec: exec [-cl] [-a name] file [redirection ...]

Exec FILE, replacing this shell with the specified program. You should remove it from the line

exec ssh-add ~/.ssh/mykey

and simply have

ssh-add ~/.ssh/mykey

edited Sep 8, 2014 at 15:09

fedorqui

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answered Sep 7, 2014 at 21:06

damienfrancois

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