Created
March 31, 2022 12:01
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Read/Update/Write HCL2 with Go + hclwrite
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| package main | |
| import ( | |
| "fmt" | |
| "io/ioutil" | |
| "github.com/hashicorp/hcl/v2" | |
| "github.com/hashicorp/hcl/v2/hclwrite" | |
| "github.com/zclconf/go-cty/cty" | |
| ) | |
| func main() { | |
| filename := "tf/main.tf" | |
| tfFile, err := ioutil.ReadFile(filename) | |
| if err != nil { | |
| fmt.Println(err) | |
| } | |
| f, diags := hclwrite.ParseConfig(tfFile, "debug.tf", hcl.Pos{Line: 1, Column: 1}) | |
| if diags.HasErrors() { | |
| panic(fmt.Errorf("config parse: %w", diags)) | |
| } | |
| rootBody := f.Body().Blocks() | |
| // Example file only has 1 resource | |
| // Should probably do something to find the resource we care about | |
| modBody := rootBody[0].Body() | |
| modBody.SetAttributeValue("terraform_version", cty.StringVal("0.13.7")) | |
| fmt.Printf("%s", f.Bytes()) | |
| ioutil.WriteFile(filename, f.Bytes(), 0600) | |
| } |
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