Add coder executable to PATH (#1771)

agent/agent.go

@@ -359,10 +359,11 @@ func (a *agent) createCommand(ctx context.Context, rawCommand string, env []stri
 	if err != nil {
 		return nil, xerrors.Errorf("getting os executable: %w", err)
 	}
+	cmd.Env = append(cmd.Env, fmt.Sprintf(`PATH=%s%c%s`, os.Getenv("PATH"), filepath.ListSeparator, executablePath))
 	// Git on Windows resolves with UNIX-style paths.
 	// If using backslashes, it's unable to find the executable.
-	executablePath = strings.ReplaceAll(executablePath, "\\", "/")
-	cmd.Env = append(cmd.Env, fmt.Sprintf(`GIT_SSH_COMMAND=%s gitssh --`, executablePath))
+	unixExecutablePath := strings.ReplaceAll(executablePath, "\\", "/")
+	cmd.Env = append(cmd.Env, fmt.Sprintf(`GIT_SSH_COMMAND=%s gitssh --`, unixExecutablePath))
 	// These prevent the user from having to specify _anything_ to successfully commit.
 	// Both author and committer must be set!
 	cmd.Env = append(cmd.Env, fmt.Sprintf(`GIT_AUTHOR_EMAIL=%s`, metadata.OwnerEmail))

agent/agent_test.go

@@ -68,6 +68,21 @@ func TestAgent(t *testing.T) {
 		require.True(t, strings.HasSuffix(strings.TrimSpace(string(output)), "gitssh --"))
 	})
 
+	t.Run("PATHHasCoder", func(t *testing.T) {
+		t.Parallel()
+		session := setupSSHSession(t, agent.Metadata{})
+		command := "sh -c 'echo $PATH'"
+		if runtime.GOOS == "windows" {
+			command = "cmd.exe /c echo %PATH%"
+		}
+		output, err := session.Output(command)
+		require.NoError(t, err)
+		ex, err := os.Executable()
+		t.Log(ex)
+		require.NoError(t, err)
+		require.True(t, strings.Contains(strings.TrimSpace(string(output)), ex), string(output), ex)
+	})
+
 	t.Run("SessionTTY", func(t *testing.T) {
 		t.Parallel()
 		if runtime.GOOS == "windows" {