lib/configuration improvements

Configuration changes:
- Configuration::value return type is now [[nodiscard]]
- Configuration::value<T> is now a generic template that only works with
the exact types of the underlying std::variant
- Add Configuration::value<concept_value_t> for standard library types
compatible with the types of std::variant
- Add Configuration::shortcut<> placeholder, and QAction and
QKeySequence specializations as a convenient way to set up shortcuts
- Deprecate setShortcut
- Add Configuration::read_file convenience member that takes file path
as parameter

Format changes:
- Configuration files can now have sections, specified as [section
name]. Section names are prepended to keys. Section names cannot be
nested.
- Configuration files can now have @@include directives, causing another
file to be read as well. The included file is not treated as nested into
a section, and will overwrite values previously set.

Others:
- add some tests for libconfiguration. QAction/QKeySequence require a
QApplication be set up, so the test application may require running
xorg/wayland.

old coverage: lines: 15.6% (960 out of 6172) branches: 9.9% (1187 out of 12012)
new coverage: lines: 17.1% (1067 out of 6254) branches: 11.0% (1388 out of 12644)

3 files changed, 0 insertions, 65 deletions

diff --git a/test/conf/main.cpp b/test/conf/main.cpp
deleted file mode 100644
index e499a4d..0000000
--- a/test/conf/main.cpp
+++ /dev/null
@@ -1,54 +0,0 @@
-#include <fstream>
-#include <iostream>
-#include <string>
-#include "configuration.h"
-#include <cassert>
-
-int main(int, char**)
-{
-    std::fstream fs;
-    fs.open("smolbote.cfg", std::fstream::in);
-    assert(fs.is_open());
-
-    {
-    auto value_map = std::make_unique<Configuration, std::initializer_list<std::pair<std::string, conf_value_t>>>({
-        { "test", std::string("unknown") },
-        { "integer-1", 20 },
-        { "integer-2", 30 }
-    });
-    value_map->read(fs);
-
-    Configuration::move_global(std::move(value_map));
-    fs.close();
-    }
-
-    {
-        Configuration g;
-        assert(g.value<std::string>("test") == "value");
-        assert(g.value<std::string>("plugins.path") == "/usr/local/lib/smolbote/plugins");
-        assert(g.value<int>("integer-1") == 20);
-        assert(g.value<int>("integer-2") == 22);
-    }
-
-/*
-    {
-    const Configuration conf(std::move(value_map));
-
-    assert(conf.value<std::string>("test") == "value");
-    assert(conf.value<std::string>("plugins.path") == "/usr/local/lib/smolbote/plugins");
-    assert(conf.value<int>("integer-1") == 20);
-    assert(conf.value<int>("integer-2") == 22);
-    }
-*/
-    // Configuration is now destroyed
-
-
-    // This should be a compiler warning
-    //const Configuration c(std::move(value_map));
-    //assert(c.value<std::string>("test") == "value");
-
-    // This should be a compiler warning and runtime error
-    //assert(value_map.value<std::string>("test").value() == "value");
-
-    return 0;
-}
diff --git a/test/conf/meson.build b/test/conf/meson.build
deleted file mode 100644
index de67db7..0000000
--- a/test/conf/meson.build
+++ /dev/null
@@ -1,6 +0,0 @@
-e = executable('conf_test',
-  dependencies: [dep_qt5, dep_configuration],
-  sources: 'main.cpp'
-)
-
-test('conf_test', e, workdir : meson.source_root()/'test/conf')
diff --git a/test/conf/smolbote.cfg b/test/conf/smolbote.cfg
deleted file mode 100644
index 25467ef..0000000
--- a/test/conf/smolbote.cfg
+++ /dev/null
@@ -1,5 +0,0 @@
-# this is a comment
-test = value
-plugins.path = /usr/local/lib/smolbote/plugins
-
-integer-2 = 22