AK: Remove the LexicalPath::is_valid() API

Since this is always set to true on the non-default constructor and
subsequently never modified, it is somewhat pointless. Furthermore,
there are arguably no invalid relative paths.

AK/LexicalPath.cpp

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Max Wipfli <max.wipfli@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -15,7 +16,6 @@ LexicalPath::LexicalPath(String s)
     : m_string(move(s))
 {
     canonicalize();
-    m_is_valid = true;
 }
 
 void LexicalPath::canonicalize()

AK/LexicalPath.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * Copyright (c) 2021, Max Wipfli <max.wipfli@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -16,7 +17,6 @@ public:
     LexicalPath() = default;
     explicit LexicalPath(String);
 
-    bool is_valid() const { return m_is_valid; }
     bool is_absolute() const { return m_is_absolute; }
     String const& string() const { return m_string; }
 
@@ -53,7 +53,6 @@ private:
     String m_basename;
     String m_title;
     String m_extension;
-    bool m_is_valid { false };
     bool m_is_absolute { false };
 };
 

AK/URL.cpp

@@ -162,7 +162,7 @@ u16 URL::default_port_for_scheme(StringView const& scheme)
 URL URL::create_with_file_scheme(String const& path, String const& fragment, String const& hostname)
 {
     LexicalPath lexical_path(path);
-    if (!lexical_path.is_valid() || !lexical_path.is_absolute())
+    if (!lexical_path.is_absolute())
         return {};
 
     URL url;

Tests/AK/TestLexicalPath.cpp

@@ -9,15 +9,9 @@
 #include <AK/LexicalPath.h>
 #include <AK/String.h>
 
-TEST_CASE(construct)
-{
-    EXPECT_EQ(LexicalPath().is_valid(), false);
-}
-
 TEST_CASE(basic)
 {
     LexicalPath path("/abc/def/ghi.txt");
-    EXPECT_EQ(path.is_valid(), true);
     EXPECT_EQ(path.basename(), "ghi.txt");
     EXPECT_EQ(path.title(), "ghi");
     EXPECT_EQ(path.extension(), "txt");

Userland/Applications/FileManager/PropertiesWindow.cpp

@@ -28,7 +28,6 @@ PropertiesWindow::PropertiesWindow(const String& path, bool disable_rename, Wind
     : Window(parent_window)
 {
     auto lexical_path = LexicalPath(path);
-    VERIFY(lexical_path.is_valid());
 
     auto& main_widget = set_main_widget<GUI::Widget>();
     main_widget.set_layout<GUI::VerticalBoxLayout>();
@@ -103,7 +102,6 @@ PropertiesWindow::PropertiesWindow(const String& path, bool disable_rename, Wind
             perror("readlink");
         } else {
             auto link_directory = LexicalPath(link_destination);
-            VERIFY(link_directory.is_valid());
             auto link_parent = URL::create_with_file_protocol(link_directory.dirname(), link_directory.basename());
             properties.append({ "Link target:", link_destination, Optional(link_parent) });
         }

Userland/DevTools/HackStudio/Dialogs/NewProjectDialog.cpp

@@ -182,18 +182,10 @@ Optional<String> NewProjectDialog::get_project_full_path()
     auto create_in = m_create_in_input->text();
     auto maybe_project_name = get_available_project_name();
 
-    if (!maybe_project_name.has_value()) {
-        return {};
-    }
-
-    auto project_name = maybe_project_name.value();
-    auto full_path = LexicalPath(String::formatted("{}/{}", create_in, project_name));
-
-    // Do not permit otherwise invalid paths.
-    if (!full_path.is_valid())
+    if (!maybe_project_name.has_value())
         return {};
 
-    return full_path.string();
+    return LexicalPath::join(create_in, *maybe_project_name).string();
 }
 
 void NewProjectDialog::do_create_project()

Userland/Libraries/LibCore/FileWatcher.cpp

@@ -74,13 +74,7 @@ static Optional<FileWatcherEvent> get_event_from_fd(int fd, HashMap<unsigned, St
     // We trust that the kernel only sends the name when appropriate.
     if (event->name_length > 0) {
         String child_name { event->name, event->name_length - 1 };
-        auto lexical_path = LexicalPath::join(path, child_name);
-        if (!lexical_path.is_valid()) {
-            dbgln_if(FILE_WATCHER_DEBUG, "get_event_from_fd: Reading from wd {}: Invalid child name '{}'", fd, child_name);
-            return {};
-        }
-
-        result.event_path = lexical_path.string();
+        result.event_path = LexicalPath::join(path, child_name).string();
     } else {
         result.event_path = path;
     }
@@ -100,11 +94,6 @@ Result<bool, String> FileWatcherBase::add_watch(String path, FileWatcherEvent::T
         free(buf);
     }
 
-    if (!lexical_path.is_valid()) {
-        dbgln_if(FILE_WATCHER_DEBUG, "add_watch: path '{}' invalid", path);
-        return false;
-    }
-
     auto const& canonical_path = lexical_path.string();
     if (m_path_to_wd.find(canonical_path) != m_path_to_wd.end()) {
         dbgln_if(FILE_WATCHER_DEBUG, "add_watch: path '{}' is already being watched", canonical_path);
@@ -145,11 +134,6 @@ Result<bool, String> FileWatcherBase::remove_watch(String path)
         free(buf);
     }
 
-    if (!lexical_path.is_valid()) {
-        dbgln_if(FILE_WATCHER_DEBUG, "remove_watch: path '{}' invalid", path);
-        return false;
-    }
-
     auto const& canonical_path = lexical_path.string();
     auto it = m_path_to_wd.find(canonical_path);
     if (it == m_path_to_wd.end()) {

Userland/Services/WindowServer/Cursor.cpp

@@ -14,10 +14,6 @@ namespace WindowServer {
 CursorParams CursorParams::parse_from_filename(const StringView& cursor_path, const Gfx::IntPoint& default_hotspot)
 {
     LexicalPath path(cursor_path);
-    if (!path.is_valid()) {
-        dbgln("Cannot parse invalid cursor path, use default cursor params");
-        return { default_hotspot };
-    }
     auto file_title = path.title();
     auto last_dot_in_title = StringView(file_title).find_last_of('.');
     if (!last_dot_in_title.has_value() || last_dot_in_title.value() == 0) {

Userland/Shell/Builtin.cpp

@@ -643,10 +643,6 @@ int Shell::builtin_popd(int argc, const char** argv)
     }
 
     LexicalPath lexical_path(path.characters());
-    if (!lexical_path.is_valid()) {
-        warnln("LexicalPath failed to canonicalize '{}'", path);
-        return 1;
-    }
 
     const char* real_path = lexical_path.string().characters();
 
@@ -729,16 +725,10 @@ int Shell::builtin_pushd(int argc, const char** argv)
         }
     }
 
-    LexicalPath lexical_path(path_builder.to_string());
-    if (!lexical_path.is_valid()) {
-        warnln("LexicalPath failed to canonicalize '{}'", path_builder.string_view());
-        return 1;
-    }
-
-    const char* real_path = lexical_path.string().characters();
+    auto real_path = LexicalPath::canonicalized_path(path_builder.to_string());
 
     struct stat st;
-    int rc = stat(real_path, &st);
+    int rc = stat(real_path.characters(), &st);
     if (rc < 0) {
         warnln("stat({}) failed: {}", real_path, strerror(errno));
         return 1;
@@ -750,13 +740,13 @@ int Shell::builtin_pushd(int argc, const char** argv)
     }
 
     if (should_switch) {
-        int rc = chdir(real_path);
+        int rc = chdir(real_path.characters());
         if (rc < 0) {
             warnln("chdir({}) failed: {}", real_path, strerror(errno));
             return 1;
         }
 
-        cwd = lexical_path.string();
+        cwd = real_path;
     }
 
     return 0;

Userland/Utilities/mktemp.cpp

@@ -97,20 +97,15 @@ int main(int argc, char** argv)
         return 1;
     }
 
-    LexicalPath target_path(String::formatted("{}/{}", target_directory, file_template));
-    if (!target_path.is_valid()) {
-        if (!quiet)
-            warnln("Invalid template path {}", target_path.string().characters());
-        return 1;
-    }
+    auto target_path = LexicalPath::join(target_directory, file_template).string();
 
-    char* final_path = make_temp(target_path.string().characters(), create_directory, dry_run);
+    char* final_path = make_temp(target_path.characters(), create_directory, dry_run);
     if (!final_path) {
         if (!quiet) {
             if (create_directory)
-                warnln("Failed to create directory via template {}", target_path.string().characters());
+                warnln("Failed to create directory via template {}", target_path.characters());
             else
-                warnln("Failed to create file via template {}", target_path.string().characters());
+                warnln("Failed to create file via template {}", target_path.characters());
         }
         return 1;
     }