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shyaml で yaml を parse して shell script で楽したい

Last updated at Posted at 2024-06-14

tldr;

shyaml を使うと yaml を shell script で parse して value を使えて楽だよ

requirements

  1. Python && pip がインストールされている
  2. shyaml がインストールされている
    • なければ pip install shyaml

shyaml の使い方

cat /path/to/my.yml | shyaml get-value path.of.my.yaml.field

example

例えば project root dir に以下の yaml があるとします。

.elasticbeanstalk/config.yml
branch-defaults:
  develop:
    environment: my-eb-env-develop
  main:
    environment: my-eb-env-main
environment-defaults:
  my-eb-env-test:
    branch: null
    repository: null
  my-eb-env-prod:
    branch: null
    repository: null
global:
  application_name: my-eb-env
  default_ec2_keyname: my-eb-env
  default_platform: hogelang on 64bit Amazon Linux
  default_region: ap-northeast-1
  include_git_submodules: true
  instance_profile: null
  platform_name: null
  platform_version: null
  profile: null
  sc: git
  workspace_type: Application

yaml を parse する shell script を書いてみる

test.sh
#!/bin/bash

# 環境の名前を設定
EB_CONFIG=".elasticbeanstalk/config.yml"
GIT_BRANCH=$(git branch --show-current)
ENV_NAME=$(cat $EB_CONFIG | shyaml get-value branch-defaults.$GIT_BRANCH.environment)
APP_NAME=$(cat $EB_CONFIG | shyaml get-value global.application_name)
REGION=$(cat $EB_CONFIG | shyaml get-value global.default_region)

echo $EB_CONFIG
echo $GIT_BRANCH
echo $ENV_NAME
echo $APP_NAME
echo $REGION

test.sh を実行してみる

validation は割愛しているけど欲しい項目の値が取得できる。

$ chmod +x test.sh

$ ./test.sh  
.elasticbeanstalk/config.yml
main
my-eb-env-main
my-eb-env
ap-northeast-1

まとめ

shyaml を使うと yaml を parse して楽して便利になるんではないかと思いました。そんじゃまた。

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