我正在运行heroku命令heroku pg:backups:capture --app appname来备份数据库，该数据库将在终端中返回如下输出：
Use Ctrl-C at any time to stop monitoring progress; the backup will continue running.
Use heroku pg:backups:info to check progress.
Stop a running backup with heroku pg:backups:cancel.
Starting backup of postgresql-xxxxxxxxxx... done
Backing up DATABASE to b007... done
如何将备份名称b007自动存储到变量中？
您可以将命令传递给sed以提取所需的字符串：
dbname=$(heroku pg:backups:capture --app appname | sed -n 's/.*DATABASE to \([^\.]*\)\.\.\..*/\1/p')
您可以通过管道|将程序的输出重定向到
grep "Backing up DATABASE to " | awk '{print substr($5,5)}'
应该是：
var=$(heroku pg:backups:capture --app appname | grep "Backing up DATABASE to " | awk '{print substr($5,5)}')
简单化的可能性：
while read -r line
do echo "$line"
case "$line" in
Backing\ up\ DATABASE\ to\ *done)
backup="${line%%... done}"
backup="${backup##* }"
esac
done < <( heroku pg:backups:capture --app appname )
echo "Backup: [$backup]"