Shell: Move everything to the Shell namespace

Also provide a basic default-constructor.

Libraries/LibGUI/ShellSyntaxHighlighter.cpp

@@ -33,6 +33,8 @@
 
 namespace GUI {
 
+using namespace Shell;
+
 enum class AugmentedTokenKind : u32 {
     __TokenTypeCount = (u32)AST::Node::Kind::__Count,
     OpenParen,

Shell/AST.cpp

@@ -37,7 +37,7 @@
 
 //#define EXECUTE_DEBUG
 
-namespace AST {
+namespace Shell::AST {
 
 template<typename T, typename... Args>
 static inline NonnullRefPtr<T> create(Args... args)

Shell/AST.h

@@ -38,7 +38,7 @@
 #include <AK/Vector.h>
 #include <LibLine/Editor.h>
 
-namespace AST {
+namespace Shell::AST {
 
 struct HighlightMetadata {
     bool is_first_in_list { true };

Shell/Builtin.cpp

@@ -35,6 +35,8 @@
 
 extern char** environ;
 
+namespace Shell {
+
 int Shell::builtin_alias(int argc, const char** argv)
 {
     Vector<const char*> arguments;
@@ -806,3 +808,5 @@ bool Shell::has_builtin(const StringView& name) const
 #undef __ENUMERATE_SHELL_BUILTIN
     return false;
 }
+
+}

Shell/Execution.h

@@ -33,6 +33,8 @@
 #include <AK/Vector.h>
 #include <LibCore/ElapsedTimer.h>
 
+namespace Shell {
+
 class FileDescriptionCollector {
 public:
     FileDescriptionCollector() { }
@@ -59,3 +61,5 @@ private:
     Vector<SavedFileDescriptor> m_saves;
     FileDescriptionCollector m_collector;
 };
+
+}

Shell/Formatter.cpp

@@ -29,6 +29,8 @@
 #include "Parser.h"
 #include <AK/TemporaryChange.h>
 
+namespace Shell {
+
 String Formatter::format()
 {
     auto node = Parser(m_source).parse();
@@ -595,3 +597,5 @@ void Formatter::visit(const AST::WriteRedirection* node)
         current_builder().append(" >");
     NodeVisitor::visit(node);
 }
+
+}

Shell/Formatter.h

@@ -34,6 +34,8 @@
 #include <AK/Vector.h>
 #include <ctype.h>
 
+namespace Shell {
+
 class Formatter final : public AST::NodeVisitor {
 public:
     Formatter(const StringView& source, ssize_t cursor = -1)
@@ -119,3 +121,5 @@ private:
 
     StringView m_trivia;
 };
+
+}

Shell/Forward.h

@@ -26,8 +26,7 @@
 
 #pragma once
 
-class Shell;
-namespace AST {
+namespace Shell::AST {
 
 struct Command;
 class Node;
@@ -75,3 +74,9 @@ class WriteAppendRedirection;
 class WriteRedirection;
 
 }
+
+namespace Shell {
+
+class Shell;
+
+}

Shell/Job.cpp

@@ -31,6 +31,8 @@
 #include <stdio.h>
 #include <sys/wait.h>
 
+namespace Shell {
+
 bool Job::print_status(PrintStatusMode mode)
 {
     int wstatus;
@@ -110,3 +112,5 @@ void Job::unblock() const
     if (!m_exited && on_exit)
         on_exit(*this);
 }
+
+}

Shell/Job.h

@@ -41,6 +41,8 @@
 #    undef JOB_TIME_INFO
 #endif
 
+namespace Shell {
+
 struct LocalFrame;
 
 class Job : public RefCounted<Job> {
@@ -127,3 +129,5 @@ private:
     bool m_should_be_disowned { false };
     OwnPtr<AST::Command> m_command;
 };
+
+}

Shell/NodeVisitor.cpp

@@ -27,7 +27,7 @@
 #include "NodeVisitor.h"
 #include "AST.h"
 
-namespace AST {
+namespace Shell::AST {
 
 void NodeVisitor::visit(const AST::PathRedirectionNode* node)
 {

Shell/NodeVisitor.h

@@ -28,7 +28,7 @@
 
 #include "Forward.h"
 
-namespace AST {
+namespace Shell::AST {
 
 class NodeVisitor {
 public:

Shell/Parser.cpp

@@ -29,6 +29,8 @@
 #include <stdio.h>
 #include <unistd.h>
 
+namespace Shell {
+
 Parser::SavedOffset Parser::save_offset() const
 {
     return { m_offset, m_line };
@@ -1350,3 +1352,5 @@ StringView Parser::consume_while(Function<bool(char)> condition)
 
     return m_input.substring_view(start_offset, m_offset - start_offset);
 }
+
+}

Shell/Parser.h

@@ -33,6 +33,8 @@
 #include <AK/StringBuilder.h>
 #include <AK/Vector.h>
 
+namespace Shell {
+
 class Parser {
 public:
     Parser(StringView input)
@@ -232,3 +234,5 @@ glob :: [*?] bareword?
       | bareword [*?]
 )";
 #endif
+
+}

Shell/Shell.cpp

@@ -57,6 +57,8 @@ extern char** environ;
 
 //#define SH_DEBUG
 
+namespace Shell {
+
 // FIXME: This should eventually be removed once we've established that
 //        waitpid() is not passed the same job twice.
 #ifdef __serenity__
@@ -523,6 +525,10 @@ bool Shell::is_runnable(const StringView& name)
 
 int Shell::run_command(const StringView& cmd)
 {
+    // The default-constructed mode of the shell
+    // should not be used for execution!
+    ASSERT(!m_default_constructed);
+
     if (cmd.is_empty())
         return 0;
 
@@ -1158,7 +1164,8 @@ Vector<Line::CompletionSuggestion> Shell::complete_path(const String& base, cons
     //      since we are not suggesting anything starting with
     //      `/foo/', but rather just `bar...'
     auto token_length = escape_token(token).length();
-    m_editor->suggest(token_length, original_token.length() - token_length);
+    if (m_editor)
+        m_editor->suggest(token_length, original_token.length() - token_length);
 
     // only suggest dot-files if path starts with a dot
     Core::DirIterator files(path,
@@ -1195,7 +1202,8 @@ Vector<Line::CompletionSuggestion> Shell::complete_program_name(const String& na
         return complete_path("", name, offset);
 
     String completion = *match;
-    m_editor->suggest(escape_token(name).length(), 0);
+    if (m_editor)
+        m_editor->suggest(escape_token(name).length(), 0);
 
     // Now that we have a program name starting with our token, we look at
     // other program names starting with our token and cut off any mismatching
@@ -1220,7 +1228,8 @@ Vector<Line::CompletionSuggestion> Shell::complete_variable(const String& name,
     Vector<Line::CompletionSuggestion> suggestions;
     auto pattern = offset ? name.substring_view(0, offset) : "";
 
-    m_editor->suggest(offset);
+    if (m_editor)
+        m_editor->suggest(offset);
 
     // Look at local variables.
     for (auto& frame : m_local_frames) {
@@ -1252,7 +1261,8 @@ Vector<Line::CompletionSuggestion> Shell::complete_user(const String& name, size
     Vector<Line::CompletionSuggestion> suggestions;
     auto pattern = offset ? name.substring_view(0, offset) : "";
 
-    m_editor->suggest(offset);
+    if (m_editor)
+        m_editor->suggest(offset);
 
     Core::DirIterator di("/home", Core::DirIterator::SkipParentAndBaseDir);
 
@@ -1274,7 +1284,8 @@ Vector<Line::CompletionSuggestion> Shell::complete_option(const String& program_
     while (start < option.length() && option[start] == '-' && start < 2)
         ++start;
     auto option_pattern = offset > start ? option.substring_view(start, offset - start) : "";
-    m_editor->suggest(offset);
+    if (m_editor)
+        m_editor->suggest(offset);
 
     Vector<Line::CompletionSuggestion> suggestions;
 
@@ -1459,6 +1470,42 @@ void Shell::notify_child_event()
     } while (!found_child);
 }
 
+Shell::Shell()
+    : m_default_constructed(true)
+{
+    push_frame().leak_frame();
+
+    int rc = gethostname(hostname, Shell::HostNameSize);
+    if (rc < 0)
+        perror("gethostname");
+
+    {
+        auto* pw = getpwuid(getuid());
+        if (pw) {
+            username = pw->pw_name;
+            home = pw->pw_dir;
+            setenv("HOME", pw->pw_dir, 1);
+        }
+        endpwent();
+    }
+
+    // For simplicity, start at the user's home directory.
+    this->cwd = home;
+    setenv("PWD", home.characters(), 1);
+
+    // Add the default PATH vars.
+    {
+        StringBuilder path;
+        path.append(getenv("PATH"));
+        if (path.length())
+            path.append(":");
+        path.append("/bin:/usr/bin:/usr/local/bin");
+        setenv("PATH", path.to_string().characters(), true);
+    }
+
+    cache_path();
+}
+
 Shell::Shell(Line::Editor& editor)
     : m_editor(editor)
 {
@@ -1507,6 +1554,9 @@ Shell::Shell(Line::Editor& editor)
 
 Shell::~Shell()
 {
+    if (m_default_constructed)
+        return;
+
     stop_all_jobs();
     save_history();
 }
@@ -1641,3 +1691,5 @@ SavedFileDescriptors::~SavedFileDescriptors()
         }
     }
 }
+
+}

Shell/Shell.h

@@ -64,6 +64,8 @@
     __ENUMERATE_SHELL_OPTION(inline_exec_keep_empty_segments, false, "Keep empty segments in inline execute $(...)") \
     __ENUMERATE_SHELL_OPTION(verbose, false, "Announce every command that is about to be executed")
 
+namespace Shell {
+
 class Shell;
 
 class Shell : public Core::Object {
@@ -199,6 +201,7 @@ public:
 
 private:
     Shell(Line::Editor&);
+    Shell();
     virtual ~Shell() override;
 
     // FIXME: Port to Core::Property
@@ -252,9 +255,13 @@ private:
     bool m_should_format_live { false };
 
     RefPtr<Line::Editor> m_editor;
+
+    bool m_default_constructed { false };
 };
 
 static constexpr bool is_word_character(char c)
 {
     return c == '_' || (c <= 'Z' && c >= 'A') || (c <= 'z' && c >= 'a');
 }
+
+}

Shell/main.cpp

@@ -36,7 +36,7 @@
 #include <string.h>
 
 RefPtr<Line::Editor> editor;
-Shell* s_shell;
+Shell::Shell* s_shell;
 
 int main(int argc, char** argv)
 {
@@ -62,7 +62,7 @@ int main(int argc, char** argv)
 
     editor = Line::Editor::construct();
 
-    auto shell = Shell::construct(*editor);
+    auto shell = Shell::Shell::construct(*editor);
     s_shell = shell.ptr();
 
     s_shell->setup_signals();
@@ -163,15 +163,15 @@ int main(int argc, char** argv)
                 shell->run_file(file_path, false);
             }
         };
-        run_rc_file(Shell::global_init_file_path);
-        run_rc_file(Shell::local_init_file_path);
+        run_rc_file(Shell::Shell::global_init_file_path);
+        run_rc_file(Shell::Shell::local_init_file_path);
     }
 
     {
         Vector<String> args;
         for (auto* arg : script_args)
             args.empend(arg);
-        shell->set_local_variable("ARGV", adopt(*new AST::ListValue(move(args))));
+        shell->set_local_variable("ARGV", adopt(*new Shell::AST::ListValue(move(args))));
     }
 
     if (command_to_run) {
@@ -188,7 +188,7 @@ int main(int argc, char** argv)
 
     shell->add_child(*editor);
 
-    Core::EventLoop::current().post_event(*shell, make<Core::CustomEvent>(Shell::ShellEventType::ReadLine));
+    Core::EventLoop::current().post_event(*shell, make<Core::CustomEvent>(Shell::Shell::ShellEventType::ReadLine));
 
     return loop.exec();
 }