feat: implement fetch command

cmd/fetch.go

@@ -0,0 +1,60 @@
+/*
+Copyright © 2025 NAME HERE <EMAIL ADDRESS>
+*/
+package cmd
+
+import (
+	"envy/cmd/utils"
+	"fmt"
+	"os"
+	"path"
+
+	"github.com/spf13/cobra"
+)
+
+// fetchCmd represents the fetch command
+var fetchCmd = &cobra.Command{
+	Use:   "fetch",
+	Short: "Automatically get the pinned environment for this project",
+	Run: func(cmd *cobra.Command, args []string) {
+		envy, err := utils.GetEnvy()
+		utils.StopIfErr(err)
+
+		project, err := utils.GetKey(envy, "envy.project")
+		utils.StopIfErr(err)
+
+		pinned, err := utils.GetKey(envy, "envy.env")
+		utils.StopIfErr(err)
+
+		dbProject, err := utils.GetProject(project)
+		utils.StopIfErr(err)
+
+		dbEnv, err := utils.GetEnvironment(dbProject.ID, pinned)
+		utils.StopIfErr(err)
+
+		cwd, err := os.Getwd()
+		utils.StopIfErr(err)
+
+		os.WriteFile(path.Join(cwd, ".env"), []byte(dbEnv.Data), 0755)
+
+		envy.Set("envy.current", pinned)
+		err = utils.WriteEnvy(envy)
+		utils.StopIfErr(err)
+
+		fmt.Printf("Fetched environment %s for project %s.\n", pinned, project)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(fetchCmd)
+
+	// Here you will define your flags and configuration settings.
+
+	// Cobra supports Persistent Flags which will work for this command
+	// and all subcommands, e.g.:
+	// fetchCmd.PersistentFlags().String("foo", "", "A help for foo")
+
+	// Cobra supports local flags which will only run when this command
+	// is called directly, e.g.:
+	// fetchCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
+}