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terraform.go
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terraform.go
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package terraform
import (
"fmt"
"github.com/blang/semver"
"github.com/pkg/errors"
"io/ioutil"
"os"
"strings"
"github.com/jenkins-x/jx/pkg/util"
"io"
)
func Init(terraformDir string, serviceAccountPath string) error {
fmt.Println("Initialising Terraform")
if _, err := os.Stat(".terraform"); !os.IsNotExist(err) {
fmt.Println("Discovered local .terraform directory, removing...")
err = os.RemoveAll(".terraform")
if err != nil {
return errors.Wrap(err, "unable to remove local .terraform directory")
}
}
os.Setenv("GOOGLE_CREDENTIALS", serviceAccountPath)
cmd := util.Command{
Name: "terraform",
Args: []string{"init", terraformDir},
}
_, err := cmd.RunWithoutRetry()
if err != nil {
return err
}
return nil
}
func Plan(terraformDir string, terraformVars string, serviceAccountPath string) (string, error) {
fmt.Println("Showing Terraform Plan")
cmd := util.Command{
Name: "terraform",
Args: []string{"plan",
fmt.Sprintf("-var-file=%s", terraformVars),
"-var",
fmt.Sprintf("credentials=%s", serviceAccountPath),
terraformDir},
}
out, err := cmd.RunWithoutRetry()
if err != nil {
return out, err
}
return out, nil
}
func Apply(terraformDir string, terraformVars string, serviceAccountPath string, stdout io.Writer, stderr io.Writer) error {
fmt.Println("Applying Terraform")
cmd := util.Command{
Name: "terraform",
Args: []string{"apply", "-auto-approve",
fmt.Sprintf("-var-file=%s", terraformVars),
"-var",
fmt.Sprintf("credentials=%s", serviceAccountPath),
terraformDir},
Out: stdout,
Err: stderr,
}
_, err := cmd.RunWithoutRetry()
if err != nil {
return err
}
return nil
}
func WriteKeyValueToFileIfNotExists(path string, key string, value string) error {
// file exists
if _, err := os.Stat(path); err == nil {
buffer, err := ioutil.ReadFile(path)
if err != nil {
return err
}
contents := string(buffer)
if strings.Contains(contents, key) {
return nil
}
}
file, err := os.OpenFile(path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0644)
if err != nil {
return err
}
defer file.Close()
line := fmt.Sprintf("%s = \"%s\"\n", key, value)
_, err = file.WriteString(line)
if err != nil {
return err
}
return nil
}
func ReadValueFromFile(path string, key string) (string, error) {
if _, err := os.Stat(path); err == nil {
buffer, err := ioutil.ReadFile(path)
if err != nil {
return "", err
}
contents := string(buffer)
lines := strings.Split(contents, "\n")
for _, line := range lines {
if strings.Contains(line, key) {
tokens := strings.Split(line, "=")
trimmedValue := strings.Trim(strings.TrimSpace(tokens[1]), "\"")
return trimmedValue, nil
}
}
}
return "", nil
}
// CheckVersion checks the installed version of terraform to sure it is greater than 0.11.0
func CheckVersion() error {
fmt.Println("Checking Terraform Version...")
cmd := util.Command{
Name: "terraform",
Args: []string{"-version"},
}
output, err := cmd.RunWithoutRetry()
if err != nil {
return err
}
version, err := extractVersionFromTerraformOutput(output)
fmt.Printf("Determined terraform version as %s\n", util.ColorInfo(version))
if err != nil {
return err
}
v, err := semver.Make(version)
r, err := semver.ParseRange(">= 0.11.0")
if !r(v) {
return errors.New("terraform version appears to be too old, please install a newer version '>= 0.11.0'")
}
fmt.Printf("Terraform version appears to be valid\n")
return nil
}
func extractVersionFromTerraformOutput(output string) (string, error) {
lines := strings.Split(output, "\n")
for _, line := range lines {
if strings.HasPrefix(line, "Terraform") {
versionTokens := strings.Split(line, " ")
return strings.TrimPrefix(versionTokens[1], "v"), nil
}
}
return "", errors.Errorf("unable to extract version from output '%s'", output)
}