Fixes runme when it attempts to access unreadable files or directories (

#646)

Handling the os.ErrPermission when an error occurs while trying to read
files without proper permissions.

Closes: #645

---------

Co-authored-by: Sebastian Tiedtke <sebastiantiedtke@gmail.com>

main_permissions_test.go

@@ -0,0 +1,60 @@
+//go:build !windows
+
+package main
+
+import (
+	"bufio"
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/rogpeppe/go-internal/testscript"
+)
+
+func isDocker() bool {
+	if _, err := os.Stat("/.dockerenv"); err == nil {
+		return true
+	}
+
+	paths := []string{"/proc/1/cgroup", "/proc/self/cgroup"}
+	for _, path := range paths {
+		file, err := os.Open(path)
+		if err != nil {
+			continue
+		}
+
+		scanner := bufio.NewScanner(file)
+		isDocker := false
+		for scanner.Scan() {
+			if strings.Contains(scanner.Text(), "docker") || strings.Contains(scanner.Text(), "kubepods") {
+				isDocker = true
+				break
+			}
+		}
+
+		if err := scanner.Err(); err != nil {
+			_ = file.Close()
+			return false
+		}
+
+		_ = file.Close()
+
+		if isDocker {
+			return true
+		}
+	}
+
+	return false
+}
+
+func TestRunmeFilePermissions(t *testing.T) {
+	if isDocker() {
+		t.Skip("Test skipped when running inside a Docker container")
+		return
+	}
+
+	testscript.Run(t, testscript.Params{
+		Dir:             "testdata/permissions",
+		ContinueOnError: true,
+	})
+}

pkg/project/project.go

@@ -365,14 +365,22 @@ func (p *Project) loadFromDirectory(
 	p.send(ctx, eventc, LoadEvent{Type: LoadEventStartedWalk})
 
 	err := util.Walk(p.fs, ".", func(path string, info fs.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
 		ignored := ignoreMatcher.Match(
 			strings.Split(path, string(filepath.Separator)),
 			info.IsDir(),
 		)
+
+		switch err.(type) {
+		case nil:
+		case *os.PathError:
+			if !ignored {
+				p.logger.Warn("path error", zap.String("path", path), zap.Error(err))
+			}
+			ignored = true
+		default:
+			return err
+		}
+
 		if !ignored {
 			absPath := p.fs.Join(p.fs.Root(), path)
 
@@ -454,7 +462,12 @@ func (p *Project) extractTasksFromFile(
 		Data: LoadEventFinishedParsingDocumentData{Path: path},
 	})
 
-	if err != nil {
+	switch err.(type) {
+	case nil:
+	case *os.PathError:
+		p.logger.Warn("path error", zap.String("path", path), zap.Error(err))
+		return
+	default:
 		p.send(ctx, eventc, LoadEvent{
 			Type: LoadEventError,
 			Data: LoadEventErrorData{Err: err},

testdata/permissions/basic.txtar

@@ -0,0 +1,32 @@
+exec chmod 000 secret
+exec chmod 000 CONTRIBUTING.md
+exec runme ls
+cmp stdout output.txt
+! stderr .
+
+-- secret/README.md --
+
+```sh {"name":"secret-command"}
+$ echo "This is a secret command"
+```
+
+-- CONTRIBUTING.md --
+
+```sh {"name":"contributing-cell"}
+$ echo "This is a secret command"
+```
+
+-- README.md --
+
+```sh {"name":"command1"}
+$ echo "Hello, runme 1!"
+```
+
+```sh {"name":"command2"}
+$ echo "Hello, runme 2!"
+```
+
+-- output.txt --
+NAME	FILE	FIRST COMMAND	DESCRIPTION	NAMED
+command1	README.md	echo "Hello, runme 1!"		Yes
+command2	README.md	echo "Hello, runme 2!"		Yes