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main.go
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package main
import (
"context"
"os"
"github.com/gruntwork-io/terragrunt/cli"
"github.com/gruntwork-io/terragrunt/cli/flags/global"
"github.com/gruntwork-io/terragrunt/internal/errors"
"github.com/gruntwork-io/terragrunt/options"
"github.com/gruntwork-io/terragrunt/pkg/log"
"github.com/gruntwork-io/terragrunt/shell"
"github.com/gruntwork-io/terragrunt/tf"
"github.com/gruntwork-io/terragrunt/util"
)
// The main entrypoint for Terragrunt
func main() {
var exitCode tf.DetailedExitCode
opts := options.NewTerragruntOptions()
// Immediately parse the `TG_LOG_LEVEL` environment variable, e.g. to set the TRACE level.
if err := global.NewLogLevelFlag(opts, nil).Parse(os.Args); err != nil {
opts.Logger.Error(err.Error())
os.Exit(1)
}
defer errors.Recover(checkForErrorsAndExit(opts.Logger, exitCode.Get()))
app := cli.NewApp(opts)
ctx := setupContext(opts, &exitCode)
err := app.RunContext(ctx, os.Args)
checkForErrorsAndExit(opts.Logger, exitCode.Get())(err)
}
// If there is an error, display it in the console and exit with a non-zero exit code. Otherwise, exit 0.
func checkForErrorsAndExit(logger log.Logger, exitCode int) func(error) {
return func(err error) {
if err == nil {
os.Exit(exitCode)
} else {
logger.Error(err.Error())
if errStack := errors.ErrorStack(err); errStack != "" {
logger.Trace(errStack)
}
// exit with the underlying error code
exitCoder, exitCodeErr := util.GetExitCode(err)
if exitCodeErr != nil {
exitCoder = 1
logger.Errorf("Unable to determine underlying exit code, so Terragrunt will exit with error code 1")
}
if explain := shell.ExplainError(err); len(explain) > 0 {
logger.Errorf("Suggested fixes: \n%s", explain)
}
os.Exit(exitCoder)
}
}
}
func setupContext(opts *options.TerragruntOptions, exitCode *tf.DetailedExitCode) context.Context {
ctx := context.Background()
ctx = tf.ContextWithDetailedExitCode(ctx, exitCode)
return log.ContextWithLogger(ctx, opts.Logger)
}