fly.alias support for warning supression

cmd/command.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"bufio"
 	"context"
 	"fmt"
 	"io"
@@ -289,6 +290,15 @@ func requireAppName(cmd *Command) Initializer {
 			}
 
 			if ctx.AppConfig.AppName != "" && ctx.AppConfig.AppName != ctx.AppName {
+				// Quick check for a fly.alias
+				present, err := checkAliasFile(ctx.AppName)
+				if err != nil {
+					return err
+				}
+				if present {
+					return nil
+				}
+
 				terminal.Warnf("app flag '%s' does not match app name in config file '%s'\n", ctx.AppName, ctx.AppConfig.AppName)
 
 				if !confirm(fmt.Sprintf("Continue using '%s'", ctx.AppName)) {
@@ -373,6 +383,15 @@ func requireAppNameAsArg(cmd *Command) Initializer {
 			}
 
 			if ctx.AppConfig.AppName != "" && ctx.AppConfig.AppName != ctx.AppName {
+				// Quick check for a fly.alias
+				present, err := checkAliasFile(ctx.AppName)
+				if err != nil {
+					return err
+				}
+				if present {
+					return nil
+				}
+
 				terminal.Warnf("app flag '%s' does not match app name in config file '%s'\n", ctx.AppName, ctx.AppConfig.AppName)
 
 				if !confirm(fmt.Sprintf("Continue using '%s'", ctx.AppName)) {
@@ -385,6 +404,27 @@ func requireAppNameAsArg(cmd *Command) Initializer {
 	}
 }
 
+func checkAliasFile(appname string) (present bool, err error) {
+	if helpers.FileExists("fly.alias") {
+		file, err := os.Open("fly.alias")
+		if err != nil {
+			return false, err
+		}
+		defer file.Close()
+
+		scanner := bufio.NewScanner(file)
+		for scanner.Scan() {
+			if scanner.Text() == appname {
+				return true, nil
+			}
+		}
+
+		if err := scanner.Err(); err != nil {
+			return false, err
+		}
+	}
+	return false, nil
+}
 func workingDirectoryFromArg(index int) func(*Command) Initializer {
 	return func(cmd *Command) Initializer {
 		return Initializer{

cmd/init.go

@@ -284,5 +284,16 @@ func runInit(commandContext *cmdctx.CmdContext) error {
 
 	fmt.Printf("New app created: %s", app.Name)
 
+	f, err := os.OpenFile("fly.alias", os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
+	if err != nil {
+		return err
+	}
+
+	defer f.Close()
+
+	if _, err = f.WriteString(app.Name + "\n"); err != nil {
+		return err
+	}
+
 	return nil
 }