github.com/cornelk/go-cloud@v0.17.1/internal/testing/terraform/terraform.go (about)

     1  // Copyright 2018 The Go Cloud Development Kit Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     https://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // Package terraform provides a function to read Terraform output.
    16  package terraform // import "github.com/cornelk/go-cloud/internal/testing/terraform"
    17  
    18  import (
    19  	"encoding/json"
    20  	"fmt"
    21  	"os/exec"
    22  )
    23  
    24  // ReadOutput runs `terraform output` on the given directory and returns
    25  // the parsed result.
    26  func ReadOutput(dir string) (map[string]Output, error) {
    27  	c := exec.Command("terraform", "output", "-json")
    28  	c.Dir = dir
    29  	data, err := c.Output()
    30  	if err != nil {
    31  		return nil, fmt.Errorf("read terraform output: %v", err)
    32  	}
    33  	var parsed map[string]Output
    34  	if err := json.Unmarshal(data, &parsed); err != nil {
    35  		return nil, fmt.Errorf("read terraform output: %v", err)
    36  	}
    37  	return parsed, nil
    38  }
    39  
    40  // Output describes a single output value.
    41  type Output struct {
    42  	Type      string      `json:"type"` // one of "string", "list", or "map"
    43  	Sensitive bool        `json:"sensitive"`
    44  	Value     interface{} `json:"value"`
    45  }