fixup! Use fixuid for mapping host uid:gid to docker uid:gid

Author: Nathan Potter

internal/codeserver/download.go

@@ -0,0 +1,53 @@
+package codeserver
+
+import (
+	"archive/tar"
+	"compress/gzip"
+	"context"
+	"io"
+	"path/filepath"
+	"strings"
+
+	"github.com/google/go-github/v24/github"
+	"golang.org/x/xerrors"
+)
+
+// DownloadURL gets a URL for the latest version of code-server.
+func DownloadURL(ctx context.Context) (string, error) {
+	client := github.NewClient(nil)
+	rel, _, err := client.Repositories.GetLatestRelease(ctx, "cdr", "code-server")
+	if err != nil {
+		return "", xerrors.Errorf("failed to get latest code-server release: %w", err)
+	}
+	for _, v := range rel.Assets {
+		// TODO: fix this jank.
+		if strings.Index(*v.Name, "linux") < 0 {
+			continue
+		}
+		return *v.BrowserDownloadURL, nil
+	}
+	return "", xerrors.New("no released found for platform")
+}
+
+// Extract takes a code-server release tar and writes out the main binary to bin.
+func Extract(ctx context.Context, tarFi io.Reader) (io.Reader, error) {
+	grd, err := gzip.NewReader(tarFi)
+	if err != nil {
+		return nil, xerrors.Errorf("failed to create gzip decoder: %w", err)
+	}
+	defer grd.Close()
+
+	rd := tar.NewReader(grd)
+	for {
+		hdr, err := rd.Next()
+		if err != nil {
+			if err == io.EOF {
+				return nil, xerrors.New("code-server not found")
+			}
+			return nil, err
+		}
+		if filepath.Base(hdr.Name) == "code-server" {
+			return rd, nil
+		}
+	}
+}

internal/codeserver/download_test.go

@@ -0,0 +1,51 @@
+package codeserver
+
+import (
+	"context"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"os/exec"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestDownloadURL_Extract(t *testing.T) {
+	t.Parallel()
+
+	ctx, cancel := context.WithTimeout(context.Background(), time.Minute*2)
+	defer cancel()
+
+	url, err := DownloadURL(ctx)
+	require.NoError(t, err)
+
+	resp, err := http.Get(url)
+	require.NoError(t, err)
+	defer resp.Body.Close()
+
+	binRd, err := Extract(ctx, resp.Body)
+	require.NoError(t, err)
+
+	if testing.Short() {
+		t.Skipf("downloading code-server can take a while")
+	}
+
+	tmpfi, err := ioutil.TempFile("", "codeserver")
+	require.NoError(t, err)
+	defer os.Remove(tmpfi.Name())
+
+	_, err = io.Copy(tmpfi, binRd)
+	require.NoError(t, err)
+
+	err = os.Chmod(tmpfi.Name(), 0750)
+	require.NoError(t, err)
+
+	err = tmpfi.Close()
+	require.NoError(t, err)
+
+	_, err = exec.Command(tmpfi.Name(), "--help").CombinedOutput()
+	require.NoError(t, err)
+}