用 bash 替换 yml 中一行的值
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Replace value of a line in a yml with bash
提问by Ivan Santos
web:
image: nginx
volumes:
- "./app:/src/app"
ports:
- "3030:3000"
- "35729:35729"
I would like to have a bash script to replace the nginxfor an argument with bash script.
我想要一个 bash 脚本来用 bash 脚本替换nginxfor 一个参数。
./script apache
Will replace nginxfor apache
将替换nginx为apache
回答by riteshtch
You can use this: sed -r 's/^(\s*)(image\s*:\s*nginx\s*$)/\1image: apache/' file
你可以使用这个： sed -r 's/^(\s*)(image\s*:\s*nginx\s*$)/\1image: apache/' file
Sample run:
示例运行：
$ cat file
web:
image: nginx
volumes:
- "./app:/src/app"
ports:
- "3030:3000"
- "35729:35729"
$ sed -r 's/^(\s*)(image\s*:\s*nginx\s*$)/image: apache/' file
web:
image: apache
volumes:
- "./app:/src/app"
ports:
- "3030:3000"
- "35729:35729"
To persist the changes into the file you can use in-place option like this:
要将更改保留到文件中，您可以使用就地选项，如下所示：
$ sed -ri 's/^(\s*)(image\s*:\s*nginx\s*$)/image: apache/' file
If you want it inside a script you can just put the sedcommand inside a script and execute it with $1in sustitution.
如果你想把它放在一个脚本中，你可以把sed命令放在一个脚本中并替换它来执行它$1。
$ vim script.sh
$ cat script.sh
sed -ri 's/^(\s*)(image\s*:\s*nginx\s*$)/image: '""'/' file
$ chmod 755 script.sh
$ cat file
web:
image: nginx
volumes:
- "./app:/src/app"
ports:
- "3030:3000"
- "35729:35729"
$ ./script.sh apache
$ cat file
web:
image: apache
volumes:
- "./app:/src/app"
ports:
- "3030:3000"
- "35729:35729"
$
回答by Jahid
script:
脚本：
#!/bin/bash
sed -i.bak "s/\bnginx\b//g" file
# \b matches for word boundary
# -i changes the file in-place
# -i.bak produces a backup with .bak extension
Now you can do ./script apacheto replace nginxwith apache.
现在你可以用apache./script apache替换nginx了。
回答by flowinh2o
You could create your script.sh as follows:
您可以按如下方式创建 script.sh：
#!/bin/bash
# image value you want to replace
# is the file you want to edit
sed -i "" "/^\([[:space:]]*image: \).*/s///"
And then run: ./script.sh apache filename.yaml
然后运行：./script.sh apache filename.yaml
回答by rmalchow
since this is apparently a docker-compose file, you might want to try
由于这显然是一个 docker-compose 文件，您可能想尝试
image: ${webserver_image}
and then set:
然后设置：
webserver_image=[nginx | apache]
before launching. i believe this should give you a nice interpolation.
在启动之前。我相信这应该给你一个很好的插值。
