// Discover plugins located on disk, and fall back on plugins baked into the
// Terraform binary.
//
// We look in the following places for plugins:
//
// 1. Terraform configuration path
// 2. Path where Terraform is installed
// 3. Path where Terraform is invoked
//
// Whichever file is discoverd LAST wins.
//
// Finally, we look at the list of plugins compiled into Terraform. If any of
// them has not been found on disk we use the internal version. This allows
// users to add / replace plugins without recompiling the main binary.
func (c *Config) Discover(ui cli.Ui) error {
// Look in ~/.terraform.d/plugins/
dir, err := ConfigDir()
if err != nil {
log.Printf("[ERR] Error loading config directory: %s", err)
} else {
if err := c.discover(filepath.Join(dir, "plugins")); err != nil {
return err
}
}
// Next, look in the same directory as the Terraform executable, usually
// /usr/local/bin. If found, this replaces what we found in the config path.
exePath, err := osext.Executable()
if err != nil {
log.Printf("[ERR] Error loading exe directory: %s", err)
} else {
if err := c.discover(filepath.Dir(exePath)); err != nil {
return err
}
}
// Finally look in the cwd (where we are invoke Terraform). If found, this
// replaces anything we found in the config / install paths.
if err := c.discover("."); err != nil {
return err
}
// Finally, if we have a plugin compiled into Terraform and we didn't find
// a replacement on disk, we'll just use the internal version.
for name, _ := range command.InternalProviders {
if path, found := c.Providers[name]; found {
ui.Warn(fmt.Sprintf("[WARN] %s overrides an internal plugin for %s-provider.\n"+
" If you did not expect to see this message you will need to remove the old plugin.\n"+
" See https://www.terraform.io/docs/internals/internal-plugins.html", path, name))
} else {
cmd, err := command.BuildPluginCommandString("provider", name)
if err != nil {
return err
}
c.Providers[name] = cmd
}
}
for name, _ := range command.InternalProvisioners {
if path, found := c.Provisioners[name]; found {
ui.Warn(fmt.Sprintf("[WARN] %s overrides an internal plugin for %s-provisioner.\n"+
" If you did not expect to see this message you will need to remove the old plugin.\n"+
" See https://www.terraform.io/docs/internals/internal-plugins.html", path, name))
} else {
cmd, err := command.BuildPluginCommandString("provisioner", name)
if err != nil {
return err
}
c.Provisioners[name] = cmd
}
}
return nil
}
// directOutput -
func directOutput(ui cli.Ui, channel, prefix, line string) {
channelType := strings.ToUpper(channel)
if ui == nil {
fmt.Printf("%s%s", prefix, line)
} else {
switch channelType {
case "ERROR":
ui.Error(fmt.Sprintf("%s%s", prefix, line))
case "INFO":
ui.Info(fmt.Sprintf("%s%s", prefix, line))
case "WARN":
ui.Warn(fmt.Sprintf("%s%s", prefix, line))
default:
ui.Output(fmt.Sprintf("%s%s", prefix, line))
}
}
}
func validateContext(ctx *terraform.Context, ui cli.Ui) bool {
if ws, es := ctx.Validate(); len(ws) > 0 || len(es) > 0 {
ui.Output(
"There are warnings and/or errors related to your configuration. Please\n" +
"fix these before continuing.\n")
if len(ws) > 0 {
ui.Warn("Warnings:\n")
for _, w := range ws {
ui.Warn(fmt.Sprintf(" * %s", w))
}
if len(es) > 0 {
ui.Output("")
}
}
if len(es) > 0 {
ui.Error("Errors:\n")
for _, e := range es {
ui.Error(fmt.Sprintf(" * %s", e))
}
return false
} else {
ui.Warn(fmt.Sprintf("\n"+
"No errors found. Continuing with %d warning(s).\n", len(ws)))
return true
}
}
return true
}