自动推送到远程 Github 存储库的脚本，不适用于 crontab？

Question

I'm trying to make a simple shell script that pushes to Github my current workspace and automatically launch that script every 12 hours with cron .

Here's what I got:

---

shell script:

#!/bin/sh

git -C ~/backups/tools pull
git -C ~/backups/tools add .
git -C ~/backups/tools commit -m 'Automatic Backup of Latest Changes'
git -C ~/backups/tools push origin master

---

crontab file:

0 */12 * * * sh ~/scripts/backup-tools.sh

---

log file: (I also logged the output)

  [master xxxxxx] Automatic Backup of Latest Changes
   1 file changed, 70 insertions(+), 43 deletions(-)

---

git log:

commit xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx1 (HEAD -> master)
Author: user <address@mail.com>
Date:   Mon Jul 27 12:00:00 2020 -0700

    Automatic Backup of Latest Changes

commit xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx2
Author: user <address@mail.com>
Date:   Mon Jul 27 00:00:01 2020 -0700

    Automatic Backup of Latest Changes

commit xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx3 (origin/master, origin/HEAD)
Author: user <address@mail.com>
Date:   Sun Jul 26 10:02:53 2020 -0700

    Latest Change

---

Running the script manually works, and pushes everything remotely. Now leaving the script to be run by crontabs also works, ie the script executes, the only problem being, which you can notice from the git log, that the origin master branch has not moved and nothing has been uploaded remotely since I last pushed it myself.

Does anyone know what the problem is? And what's the fix?

Thanks.

Answer 1

The reason it didn't work is because the cron job was launching a script on a new terminal instance that didn't source my .zshrc and .bashrc which contained macros and important information for the script. So I added this to the script:

if [ -z ${ZSH+x} ]; then        # <--- if .zshrc wasn't sourced yet
  source ~/.zshrc               # <--- source it
fi

...and it worked great.