Ports Packer code to load CLI configuration and external plugins
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package main
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// ConfigFile returns the default path to the configuration file. On
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// Unix-like systems this is the ".terraformrc" file in the home directory.
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// On Windows, this is the "terraform.rc" file in the application data
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// directory.
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func ConfigFile() (string, error) {
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return configFile()
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}
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// +build darwin freebsd linux netbsd openbsd
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package main
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import (
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"bytes"
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"errors"
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"log"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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func configFile() (string, error) {
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dir, err := configDir()
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if err != nil {
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return "", err
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}
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return filepath.Join(dir, ".terraformrc"), nil
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}
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func configDir() (string, error) {
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// First prefer the HOME environmental variable
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if home := os.Getenv("HOME"); home != "" {
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log.Printf("Detected home directory from env var: %s", home)
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return home, nil
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}
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// If that fails, try the shell
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var stdout bytes.Buffer
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cmd := exec.Command("sh", "-c", "eval echo ~$USER")
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cmd.Stdout = &stdout
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if err := cmd.Run(); err != nil {
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return "", err
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}
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result := strings.TrimSpace(stdout.String())
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if result == "" {
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return "", errors.New("blank output")
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}
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return result, nil
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}
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@ -0,0 +1,37 @@
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// +build windows
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package main
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import (
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"path/filepath"
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"syscall"
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"unsafe"
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)
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var (
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shell = syscall.MustLoadDLL("Shell32.dll")
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getFolderPath = shell.MustFindProc("SHGetFolderPathW")
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)
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const CSIDL_APPDATA = 26
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func configFile() (string, error) {
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dir, err := configDir()
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if err != nil {
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return "", err
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}
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return filepath.Join(dir, "terraform.rc"), nil
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}
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func configDir() (string, error) {
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b := make([]uint16, syscall.MAX_PATH)
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// See: http://msdn.microsoft.com/en-us/library/windows/desktop/bb762181(v=vs.85).aspx
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r, _, err := getFolderPath.Call(0, CSIDL_APPDATA, 0, 0, uintptr(unsafe.Pointer(&b[0])))
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if uint32(r) != 0 {
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return "", err
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}
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return syscall.UTF16ToString(b), nil
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}
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50
main.go
50
main.go
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@ -107,6 +107,24 @@ func wrappedMain() int {
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HelpWriter: os.Stdout,
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}
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clicfgFile, err := cliConfigFile()
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error loading user configuration: \n\n%s\n", err)
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return 1
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}
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usrcfg, err := LoadConfig(clicfgFile)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error loading user configuration: \n\n%s\n", err)
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return 1
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}
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config = *config.Merge(usrcfg)
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// Initialize the TFConfig settings for the commands...
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ContextOpts.Providers = config.ProviderFactories()
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ContextOpts.Provisioners = config.ProvisionerFactories()
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exitCode, err := cli.Run()
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if err != nil {
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fmt.Fprintf(os.Stderr, "Error executing CLI: %s\n", err.Error())
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@ -116,6 +134,38 @@ func wrappedMain() int {
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return exitCode
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}
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func cliConfigFile() (string, error) {
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mustExist := true
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configFilePath := os.Getenv("TERRAFORM_CONFIG")
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if configFilePath == "" {
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var err error
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configFilePath, err = configFile()
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mustExist = false
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if err != nil {
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log.Printf("Error detecting default CLI config file path: %s", err)
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}
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}
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log.Printf("Attempting to open CLI config file: %s", configFilePath)
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f, err := os.Open(configFilePath)
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if err != nil {
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if !os.IsNotExist(err) {
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return "", err
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}
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if mustExist {
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return "", err
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}
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log.Println("File doesn't exist, but doesn't need to. Ignoring.")
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return "", nil
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}
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defer f.Close()
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return configFilePath, nil
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}
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// copyOutput uses output prefixes to determine whether data on stdout
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// should go to stdout or stderr. This is due to panicwrap using stderr
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// as the log and error channel.
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