Expand env vars as list of strings

This makes it possible to do :select `%val{selections_decs}` and to
correctly combine $kak_quoted with those.

doc/pages/changelog.asciidoc

@@ -3,6 +3,11 @@
 This changelog contains major and/or breaking changes to Kakoune between
 released versions.
 
+== Development version
+
+* `%var{...}` now expands to list of strings, `$kak_quoted_...` now work
+  as expected with these.
+
 == Kakoune v2020.01.16
 
 * Expose history tree through `$kak_history` and

src/buffer_utils.cc

@@ -228,30 +228,35 @@ auto to_string(Buffer::HistoryId id)
     return to_string(static_cast<size_t>(id));
 }
 
-String history_as_string(const Vector<Buffer::HistoryNode>& history, Quoting quoting)
+static String modification_as_string(const Buffer::Modification& modification)
 {
-    auto format_history_node = [&](const Buffer::HistoryNode& node) {
+    return format("{}{}.{}|{}",
-        auto seconds = std::chrono::duration_cast<std::chrono::seconds>(node.committed.time_since_epoch());
-        return format("{} {} {}{}{}",
-                      node.parent,
-                      seconds.count(),
-                      node.redo_child,
-                      node.undo_group.empty() ? "" : " ",
-                      undo_group_as_string(node.undo_group, quoting));
-    };
-    return join(history | transform(format_history_node), ' ', false);
-}
-
-String undo_group_as_string(const Buffer::UndoGroup& undo_group, Quoting quoting)
-{
-    auto modification_as_string = [&](const Buffer::Modification& modification) {
-        auto quote = quoter(quoting);
-        return quote(format("{}{}.{}|{}",
                   modification.type == Buffer::Modification::Type::Insert ? '+' : '-',
                   modification.coord.line, modification.coord.column,
-                            modification.content->strview()));
+                  modification.content->strview());
+}
+
+Vector<String> history_as_strings(const Vector<Buffer::HistoryNode>& history)
+{
+    Vector<String> res;
+    for (auto& node : history)
+    {
+        auto seconds = std::chrono::duration_cast<std::chrono::seconds>(node.committed.time_since_epoch());
+        res.push_back(to_string(node.parent));
+        res.push_back(to_string(seconds.count()));
+        res.push_back(to_string(node.redo_child));
+        for (auto& modification : node.undo_group)
+            res.push_back(modification_as_string(modification));
     };
-    return join(undo_group | transform(modification_as_string), ' ', false);
+    return res;
+}
+
+Vector<String> undo_group_as_strings(const Buffer::UndoGroup& undo_group)
+{
+    Vector<String> res;
+    for (auto& modification : undo_group)
+        res.push_back(modification_as_string(modification));
+    return res;
 }
 
 }

src/buffer_utils.hh

@@ -84,8 +84,8 @@ void reload_file_buffer(Buffer& buffer);
 
 void write_to_debug_buffer(StringView str);
 
-String history_as_string(const Vector<Buffer::HistoryNode>& history, Quoting quoting);
+Vector<String> history_as_strings(const Vector<Buffer::HistoryNode>& history);
-String undo_group_as_string(const Buffer::UndoGroup& undo_group, Quoting quoting);
+Vector<String> undo_group_as_strings(const Buffer::UndoGroup& undo_group);
 
 }
 

src/command_manager.cc

@@ -362,7 +362,10 @@ expand_token(const Token& token, const Context& context, const ShellContext& she
         auto it = shell_context.env_vars.find(content);
         if (it != shell_context.env_vars.end())
             return {it->value};
-        return {ShellManager::instance().get_val(content, context, Quoting::Kakoune)};
+        if constexpr (single)
+            return join(ShellManager::instance().get_val(content, context), false, ' ');
+        else
+            return ShellManager::instance().get_val(content, context);
     }
     case Token::Type::ArgExpand:
     {

src/main.cc

@@ -156,179 +156,193 @@ String config_directory()
     return format("{}/.config/kak", homedir());
 }
 
+static auto main_sel_first(const SelectionList& selections)
+{
+    auto beg = &*selections.begin(), end = &*selections.end();
+    auto main = beg + selections.main_index();
+    using View = ConstArrayView<Selection>;
+    return concatenated(View{main, end}, View{beg, main});
+}
+
 static const EnvVarDesc builtin_env_vars[] = { {
         "bufname", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.buffer().display_name(); }
+        { return {context.buffer().display_name()}; }
     }, {
         "buffile", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.buffer().name(); }
+        { return {context.buffer().name()}; }
     }, {
         "buflist", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return join(BufferManager::instance() |
+        { return BufferManager::instance() | transform(&Buffer::display_name) | gather<Vector>(); }
-                      transform(&Buffer::display_name) | transform(quoter(quoting)), ' ', false); }
     }, {
         "buf_line_count", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.buffer().line_count()); }
+        { return {to_string(context.buffer().line_count())}; }
     }, {
         "timestamp", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.buffer().timestamp()); }
+        { return {to_string(context.buffer().timestamp())}; }
     }, {
         "history_id", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string((size_t)context.buffer().current_history_id()); }
+        { return {to_string((size_t)context.buffer().current_history_id())}; }
     }, {
         "selection", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
         { const Selection& sel = context.selections().main();
-          return content(context.buffer(), sel); }
+          return {content(context.buffer(), sel)}; }
     }, {
         "selections", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return join(context.selections_content() | transform(quoter(quoting)), ' ', false); }
+        { return context.selections_content(); }
     }, {
         "runtime", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return runtime_directory(); }
+        { return {runtime_directory()}; }
     }, {
         "config", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return config_directory(); }
+        { return {config_directory()}; }
     }, {
         "version", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return version; }
+        { return {version}; }
     }, {
         "opt_", true,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.options()[name.substr(4_byte)].get_as_string(quoting); }
+        { return context.options()[name.substr(4_byte)].get_as_strings(); }
     }, {
         "main_reg_", true,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.main_sel_register_value(name.substr(9_byte)).str(); }
+        { return {context.main_sel_register_value(name.substr(9_byte)).str()}; }
     }, {
         "reg_", true,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context)
-        { return join(RegisterManager::instance()[name.substr(4_byte)].get(context) |
+        { return RegisterManager::instance()[name.substr(4_byte)].get(context) |
-                      transform(quoter(quoting)), ' ', false); }
+                     gather<Vector<String>>(); }
     }, {
         "client_env_", true,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.client().get_env_var(name.substr(11_byte)).str(); }
+        { return {context.client().get_env_var(name.substr(11_byte)).str()}; }
     }, {
         "session", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return Server::instance().session(); }
+        { return {Server::instance().session()}; }
     }, {
         "client", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.name(); }
+        { return {context.name()}; }
     }, {
         "client_pid", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.client().pid()); }
+        { return {to_string(context.client().pid())}; }
     }, {
         "client_list", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return join(ClientManager::instance() |
+        { return ClientManager::instance() |
                       transform([](const std::unique_ptr<Client>& c) -> const String&
-                               { return c->context().name(); }), ' ', false); }
+                                { return c->context().name(); }) | gather<Vector>(); }
     }, {
         "modified", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return context.buffer().is_modified() ? "true" : "false"; }
+        { return {context.buffer().is_modified() ? "true" : "false"}; }
     }, {
         "cursor_line", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.selections().main().cursor().line + 1); }
+        { return {to_string(context.selections().main().cursor().line + 1)}; }
     }, {
         "cursor_column", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.selections().main().cursor().column + 1); }
+        { return {to_string(context.selections().main().cursor().column + 1)}; }
     }, {
         "cursor_char_value", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
         { auto coord = context.selections().main().cursor();
           auto& buffer = context.buffer();
-          return to_string((size_t)utf8::codepoint(buffer.iterator_at(coord), buffer.end())); }
+          return {to_string((size_t)utf8::codepoint(buffer.iterator_at(coord), buffer.end()))}; }
     }, {
         "cursor_char_column", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
         { auto coord = context.selections().main().cursor();
-          return to_string(context.buffer()[coord.line].char_count_to(coord.column) + 1); }
+          return {to_string(context.buffer()[coord.line].char_count_to(coord.column) + 1)}; }
     }, {
         "cursor_display_column", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
         { auto coord = context.selections().main().cursor();
-          return to_string(get_column(context.buffer(),
+          return {to_string(get_column(context.buffer(),
                                        context.options()["tabstop"].get<int>(),
-                                      coord) + 1); }
+                                       coord) + 1)}; }
     }, {
         "cursor_byte_offset", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
         { auto cursor = context.selections().main().cursor();
-          return to_string(context.buffer().distance({0,0}, cursor)); }
+          return {to_string(context.buffer().distance({0,0}, cursor))}; }
     }, {
         "selection_desc", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return selection_to_string(ColumnType::Byte, context.buffer(),
+        { return {selection_to_string(ColumnType::Byte, context.buffer(), context.selections().main())}; }
-                                     context.selections().main()); }
     }, {
         "selections_desc", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return selection_list_to_string(ColumnType::Byte, context.selections()); }
+        { return main_sel_first(context.selections()) |
+                     transform([&buffer=context.buffer()](const Selection& sel) {
+                         return selection_to_string(ColumnType::Byte, buffer, sel);
+                     }) | gather<Vector>(); }
     }, {
         "selections_char_desc", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return selection_list_to_string(ColumnType::Codepoint, context.selections()); }
+        { return main_sel_first(context.selections()) |
+                     transform([&buffer=context.buffer()](const Selection& sel) {
+                         return selection_to_string(ColumnType::Codepoint, buffer, sel);
+                     }) | gather<Vector>(); }
     }, {
         "selections_display_column_desc", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return selection_list_to_string(ColumnType::DisplayColumn,
+        { return main_sel_first(context.selections()) |
-                                          context.selections(),
+                     transform([&buffer=context.buffer(), tabstop=context.options()["tabstop"].get<int>()](const Selection& sel) {
-                                          context.options()["tabstop"].get<int>()); }
+                         return selection_to_string(ColumnType::DisplayColumn, buffer, sel, tabstop);
+                     }) | gather<Vector>(); }
     }, {
         "selection_length", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(char_length(context.buffer(), context.selections().main())); }
+        { return {to_string(char_length(context.buffer(), context.selections().main()))}; }
     }, {
         "selections_length", false,
-        [](StringView name, const Context& context, Quoting quoting)
+        [](StringView name, const Context& context) -> Vector<String>
-        { return join(context.selections() |
+        { return context.selections() |
-                      transform([&](const Selection& s)
+                     transform([&](const Selection& s) {
-                               { return to_string(char_length(context.buffer(), s)); }), ' ', false); }
+                         return to_string(char_length(context.buffer(), s));
+                     }) | gather<Vector<String>>(); }
     }, {
         "window_width", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.window().dimensions().column); }
+        { return {to_string(context.window().dimensions().column)}; }
     }, {
         "window_height", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return to_string(context.window().dimensions().line); }
+        { return {to_string(context.window().dimensions().line)}; }
     }, {
         "user_modes", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return join(context.keymaps().user_modes(), ' ', false); }
+        { return context.keymaps().user_modes(); }
     }, {
         "window_range", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
         {
             auto setup = context.window().compute_display_setup(context);
-            return format("{} {} {} {}", setup.window_pos.line, setup.window_pos.column,
+            return {format("{} {} {} {}", setup.window_pos.line, setup.window_pos.column,
-                                         setup.window_range.line, setup.window_range.column);
+                                          setup.window_range.line, setup.window_range.column)};
         }
     }, {
         "history", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return history_as_string(context.buffer().history(), quoting); }
+        { return history_as_strings(context.buffer().history()); }
     }, {
         "uncommitted_modifications", false,
-        [](StringView name, const Context& context, Quoting quoting) -> String
+        [](StringView name, const Context& context) -> Vector<String>
-        { return undo_group_as_string(context.buffer().current_undo_group(), quoting); }
+        { return undo_group_as_strings(context.buffer().current_undo_group()); }
     }
 };
 

src/shell_manager.cc

@@ -152,8 +152,8 @@ Vector<String> generate_env(StringView cmdline, const Context& context, const Sh
         auto var_it = shell_context.env_vars.find(name);
         try
         {
-            const String& value = var_it != shell_context.env_vars.end() ?
+            String value = var_it != shell_context.env_vars.end() ?
-                var_it->value : ShellManager::instance().get_val(name, context, quoting);
+                var_it->value : join(ShellManager::instance().get_val(name, context) | transform(quoter(quoting)), ' ', false);
 
             StringView quoted{match[1].first, match[1].second};
             kak_env.push_back(format("kak_{}{}={}", quoted, name, value));
@@ -327,7 +327,7 @@ std::pair<String, int> ShellManager::eval(
     return { std::move(stdout_contents), WIFEXITED(status) ? WEXITSTATUS(status) : -1 };
 }
 
-String ShellManager::get_val(StringView name, const Context& context, Quoting quoting) const
+Vector<String> ShellManager::get_val(StringView name, const Context& context) const
 {
     auto env_var = find_if(m_env_vars, [name](const EnvVarDesc& desc) {
         return desc.prefix ? prefix_match(name, desc.str) : name == desc.str;
@@ -336,7 +336,7 @@ String ShellManager::get_val(StringView name, const Context& context, Quoting qu
     if (env_var == m_env_vars.end())
         throw runtime_error("no such env var: " + name);
 
-    return env_var->func(name, context, quoting);
+    return env_var->func(name, context);
 }
 
 CandidateList ShellManager::complete_env_var(StringView prefix,

src/shell_manager.hh

@@ -18,11 +18,9 @@ struct ShellContext
     EnvVarMap env_vars;
 };
 
-enum class Quoting;
-
 struct EnvVarDesc
 {
-    using Retriever = String (*)(StringView name, const Context&, Quoting quoting);
+    using Retriever = Vector<String> (*)(StringView name, const Context&);
 
     StringView str;
     bool prefix;
@@ -46,7 +44,7 @@ public:
                                 Flags flags = Flags::WaitForStdout,
                                 const ShellContext& shell_context = {});
 
-    String get_val(StringView name, const Context& context, Quoting quoting) const;
+    Vector<String> get_val(StringView name, const Context& context) const;
 
     CandidateList complete_env_var(StringView prefix, ByteCount cursor_pos) const;
 

test/compose/history/kak_quoted_history

@@ -1 +1 @@
-- $timestamp 1 0 $timestamp - '+0.5|m' '+0.6|i' '+0.7|d' '+0.8|d' '+0.9|l' '+0.10|e' '-0.8|dle'
+'-' '$timestamp' '1' '0' '$timestamp' '-' '+0.5|m' '+0.6|i' '+0.7|d' '+0.8|d' '+0.9|l' '+0.10|e' '-0.8|dle'

test/compose/history/rc

@@ -1,6 +1,6 @@
 # Make our expansion have a predictable timestamp
 hook global ClientClose .* %{
     nop %sh{
-        kak -f 'ghf<space>ec$timestamp<esc>2f<space>ec$timestamp<esc>' kak_quoted_history
+        kak -f 'ghf<space>lwc$timestamp<esc>3f<space>lwc$timestamp<esc>' kak_quoted_history
     }
 }

test/shell/quoted-range/out

@@ -1 +1 @@
-1 '1.1,1.1|a b' '1.2,1.2|b c'
+'1' '1.1,1.1|a b' '1.2,1.2|b c'