github.com/Redstoneguy129/cli@v0.0.0-20230211220159-15dca4e91917/internal/functions/download/download.go (about)

     1  package download
     2  
     3  import (
     4  	"bytes"
     5  	"context"
     6  	"errors"
     7  	"fmt"
     8  	"net/http"
     9  	"os"
    10  	"os/exec"
    11  	"path/filepath"
    12  
    13  	"github.com/Redstoneguy129/cli/internal/utils"
    14  	"github.com/spf13/afero"
    15  )
    16  
    17  func Run(ctx context.Context, slug string, projectRefArg string, fsys afero.Fs) error {
    18  	// 1. Sanity checks.
    19  	projectRef := projectRefArg
    20  	var scriptDir *utils.DenoScriptDir
    21  	{
    22  		if len(projectRefArg) == 0 {
    23  			ref, err := utils.LoadProjectRef(fsys)
    24  			if err != nil {
    25  				return err
    26  			}
    27  			projectRef = ref
    28  		} else if !utils.ProjectRefPattern.MatchString(projectRefArg) {
    29  			return errors.New("Invalid project ref format. Must be like `abcdefghijklmnopqrst`.")
    30  		}
    31  		if err := utils.ValidateFunctionSlug(slug); err != nil {
    32  			return err
    33  		}
    34  	}
    35  	if err := utils.InstallOrUpgradeDeno(ctx, fsys); err != nil {
    36  		return err
    37  	}
    38  
    39  	var err error
    40  	scriptDir, err = utils.CopyDenoScripts(ctx, fsys)
    41  	if err != nil {
    42  		return err
    43  	}
    44  
    45  	// 2. Download Function.
    46  	{
    47  		fmt.Println("Downloading " + utils.Bold(slug))
    48  		denoPath, err := utils.GetDenoPath()
    49  		if err != nil {
    50  			return err
    51  		}
    52  
    53  		resp, err := utils.GetSupabase().GetFunctionBodyWithResponse(ctx, projectRef, slug)
    54  		if err != nil {
    55  			return err
    56  		}
    57  
    58  		switch resp.StatusCode() {
    59  		case http.StatusNotFound: // Function doesn't exist
    60  			return errors.New("Function " + utils.Aqua(slug) + " does not exist on the Supabase project.")
    61  		case http.StatusOK: // Function exists
    62  			resBuf := bytes.NewReader(resp.Body)
    63  
    64  			extractScriptPath := scriptDir.ExtractPath
    65  			funcDir := filepath.Join(utils.FunctionsDir, slug)
    66  			var errBuf bytes.Buffer
    67  			args := []string{"run", "-A", extractScriptPath, funcDir}
    68  			cmd := exec.CommandContext(ctx, denoPath, args...)
    69  			cmd.Stdin = resBuf
    70  			cmd.Stdout = os.Stdout
    71  			cmd.Stderr = &errBuf
    72  			if err := cmd.Run(); err != nil {
    73  				return fmt.Errorf("Error downloading function: %w\n%v", err, errBuf.String())
    74  			}
    75  		default:
    76  			return errors.New("Unexpected error downloading Function: " + string(resp.Body))
    77  		}
    78  	}
    79  
    80  	fmt.Println("Downloaded Function " + utils.Aqua(slug) + " from project " + utils.Aqua(projectRef) + ".")
    81  	return nil
    82  }