terraform 中的正则表达式替换函数取消注释 YAML 文件中的多行

Question

我在 YAML 文件中有以下三行：

# upstream_dns_servers:
#   - 8.8.8.8
#   - 8.8.4.4

我想从每行的开头删除哈希符号，同时保留哈希符号后面的所有内容，即得到：

upstream_dns_servers:
   - 8.8.8.8
   - 8.8.4.4

这应该可以通过 HCL 替换函数和它支持的正则表达式方言实现，我尝试使用 (?:x) 语法搜索字符串（非捕获子模式 - 根据 Terraform 文档）成功。

Answer 1

作为一个虚拟示例，给定以下 test.yml 文件

some_key: toto 
# upstream_dns_servers:
#   - 8.8.8.8
#   - 8.8.4.4
other_key: titi

main.tf 中的以下条目完美地完成了工作：

data "local_file" "config" {
    filename = "test.yml"
}

resource "local_file" "config_changed" {
  content  = join("\n", [for line in split("\n", data.local_file.config.content) : replace(line, "/^# (.*)$/", "")] )
  filename = "test-copy.yml"
}

结果：

$ terraform apply

Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the
following symbols:
  + create

Terraform will perform the following actions:

  # local_file.config_changed will be created
  + resource "local_file" "config_changed" {
      + content              = <<-EOT
            some_key: toto 
            upstream_dns_servers:
              - 8.8.8.8
              - 8.8.4.4
            other_key: titi
        EOT
      + directory_permission = "0777"
      + file_permission      = "0777"
      + filename             = "test-copy.yml"
      + id                   = (known after apply)
    }

Plan: 1 to add, 0 to change, 0 to destroy.

Do you want to perform these actions?
  Terraform will perform the actions described above.
  Only 'yes' will be accepted to approve.

  Enter a value: yes

local_file.config_changed: Creating...
local_file.config_changed: Creation complete after 0s [id=cbf2811f5394ed4e55e0fa986432ae077790a6c8]

$ cat test-copy.yml
some_key: toto 
upstream_dns_servers:
  - 8.8.8.8
  - 8.8.4.4
other_key: titi

terraform 中的正则表达式替换函数取消注释 YAML 文件中的多行

regex in terraform replace function to uncomment multiple lines in a YAML file

regex

terraform