feat: manually manage directory creation

internal/unarchive/unarchive.go

@@ -10,6 +10,13 @@ import (
 	"github.com/mholt/archiver/v4"
 )
 
+func trimTopDir(dir string) string {
+	if pos := strings.Index(dir, "/"); pos >= 0 {
+		return dir[pos+1:]
+	}
+	return dir
+}
+
 func Unarchive(input io.Reader, dir string) error {
 	// TODO: consider if should write to a more generic interface
 	// like a writer, or if maybe if the function itself
@@ -24,17 +31,41 @@ func Unarchive(input io.Reader, dir string) error {
 	// we return fs.SkipDir from our handler
 	// (leave this nil to walk ALL files from the archive)
 
+	// not sure if this should be a syncmap, or if a map is ok?
+	// not sure if the handler itself is invoked serially or if it
+	// is concurrent?
+	dirMap := map[string]bool{}
 	handler := func(ctx context.Context, f archiver.File) error {
 		fileName := f.NameInArchive
 		// currently on osx we get a top dir of ./bin and ./share
 		// when in reality the
 		if strings.HasPrefix(fileName, "quarto-") {
-			fileName = strings.Join(strings.Split(fileName, "/")[1:], "/")
+			fileName = trimTopDir(fileName)
 		}
-		// do something with the file
 		newPath := filepath.Join(dir, fileName)
+		fdir := filepath.Dir(newPath)
 		if f.IsDir() {
+			dirMap[fdir] = true
 			return os.MkdirAll(newPath, f.Mode())
+		} else {
+			// check if we've seen the dir before, if not, we'll attemp to create
+			// it in case its not there. This needs to be done as archive formats
+			// do not necessarily always have the directory in order/present
+			// eg zip dirs for quarto definitely are missing seemingly random dirs
+			// when talking with charles about it, we were both unsure what might
+			// be the reason, and assume its probably the powershell compress-archive
+			// encantation, so rather than trying to go down that rabbit hole too far,
+			// some additional checking here
+			_, seenDir := dirMap[fdir]
+			if !seenDir {
+				dirMap[fdir] = true
+				// linux default for new directories is 777 and let the umask handle
+				// if should have other controls
+				err := os.MkdirAll(newPath, 0777)
+				if err != nil {
+					return err
+				}
+			}
 		}
 		newFile, err := os.OpenFile(newPath, os.O_CREATE|os.O_WRONLY, f.Mode())
 		if err != nil {