Bump to 0.2.31

Do not set CMAKE_MSVC_RUNTIME_LIBRARY if it's already set

.github/workflows/build.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2022, macos-11, ubuntu-20.04]
+        os: [windows-2022, macos-latest, ubuntu-20.04]
     env:
       BUILD_TYPE: 'Release'
       CMAKE_GENERATOR: 'Ninja'

.github/workflows/lint.yml

@@ -1,9 +1,11 @@
 name: lint
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   clang-format:
+    # Skip building pull requests from the same repository
+    if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
     runs-on: ubuntu-latest
 
     steps:
@@ -27,6 +29,8 @@ jobs:
           exit 1
 
   editorconfig:
+    # Skip building pull requests from the same repository
+    if: ${{ github.event_name == 'push' || (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository) }}
     runs-on: ubuntu-latest
 
     steps:

CMakeLists.txt

@@ -22,7 +22,7 @@ project(cmkr
 	LANGUAGES
 		CXX
 	VERSION
-		0.2.26
+		0.2.31
 	DESCRIPTION
 		"CMakeLists generator from TOML"
 )
@@ -58,12 +58,9 @@ generate_documentation()
 
 # Target: cmkr
 set(cmkr_SOURCES
-	"src/arguments.cpp"
-	"src/build.cpp"
-	"src/cmake_generator.cpp"
-	"src/help.cpp"
-	"src/main.cpp"
-	"src/project_parser.cpp"
+	cmake.toml
+	"cmake/cmkr.cmake"
+	"cmake/version.hpp.in"
 	"include/arguments.hpp"
 	"include/build.hpp"
 	"include/cmake_generator.hpp"
@@ -71,9 +68,12 @@ set(cmkr_SOURCES
 	"include/help.hpp"
 	"include/literals.hpp"
 	"include/project_parser.hpp"
-	"cmake/cmkr.cmake"
-	"cmake/version.hpp.in"
-	cmake.toml
+	"src/arguments.cpp"
+	"src/build.cpp"
+	"src/cmake_generator.cpp"
+	"src/help.cpp"
+	"src/main.cpp"
+	"src/project_parser.cpp"
 )
 
 add_executable(cmkr)
@@ -94,7 +94,6 @@ target_link_libraries(cmkr PRIVATE
 	ghc_filesystem
 	mpark_variant
 	ordered_map
-	nlohmann_json
 )
 
 get_directory_property(CMKR_VS_STARTUP_PROJECT DIRECTORY ${PROJECT_SOURCE_DIR} DEFINITION VS_STARTUP_PROJECT)
@@ -103,7 +102,7 @@ if(NOT CMKR_VS_STARTUP_PROJECT)
 endif()
 
 set(CMKR_TARGET cmkr)
-generate_resources(${CMKR_TARGET})
+include("cmake/custom_targets.cmake")
 
 install(
 	TARGETS

cmake.toml

@@ -4,7 +4,7 @@ cmkr-include = false
 
 [project]
 name = "cmkr"
-version = "0.2.26"
+version = "0.2.31"
 description = "CMakeLists generator from TOML"
 languages = ["CXX"]
 include-after = [
@@ -36,11 +36,8 @@ link-libraries = [
     "ghc_filesystem",
     "mpark_variant",
     "ordered_map",
-    "nlohmann_json",
 ]
-cmake-after = """
-generate_resources(${CMKR_TARGET})
-"""
+include-after = ["cmake/custom_targets.cmake"]
 
 [[install]]
 targets = ["cmkr"]

cmake/cmkr.cmake

@@ -2,7 +2,7 @@ include_guard()
 
 # Change these defaults to point to your infrastructure if desired
 set(CMKR_REPO "https://github.com/build-cpp/cmkr" CACHE STRING "cmkr git repository" FORCE)
-set(CMKR_TAG "v0.2.26" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
+set(CMKR_TAG "v0.2.31" CACHE STRING "cmkr git tag (this needs to be available forever)" FORCE)
 set(CMKR_COMMIT_HASH "" CACHE STRING "cmkr git commit hash (optional)" FORCE)
 
 # To bootstrap/generate a cmkr project: cmake -P cmkr.cmake

cmake/custom_targets.cmake

@@ -0,0 +1,18 @@
+generate_resources(cmkr)
+
+add_custom_target(regenerate-cmake
+        COMMAND "$<TARGET_FILE:cmkr>" gen
+        WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
+)
+
+if(CMAKE_CONFIGURATION_TYPES)
+    add_custom_target(run-tests
+            COMMAND "${CMAKE_CTEST_COMMAND}" -C $<CONFIG>
+            WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/tests"
+    )
+else()
+    add_custom_target(run-tests
+            COMMAND "${CMAKE_CTEST_COMMAND}"
+            WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/tests"
+    )
+endif()

docs/cmake-toml.md

@@ -67,15 +67,17 @@ _Note_: It is generally discouraged to disable the `C` language, unless you are
 
 ## Conditions
 
-You can specify your own conditions and use them in any `condition` field:
+You can specify your own named conditions and use them in any `condition` field:
 
 ```toml
 [conditions]
-arch64 = "CMAKE_SIZEOF_VOID_P EQUAL 8"
-arch32 = "CMAKE_SIZEOF_VOID_P EQUAL 4"
+ptr64 = "CMAKE_SIZEOF_VOID_P EQUAL 8"
+ptr32 = "CMAKE_SIZEOF_VOID_P EQUAL 4"
 ```
 
-This will make the `arch64` and `arch32` conditions available with their respective CMake expressions.
+This will make the `ptr64` and `ptr32` conditions available with their respective CMake expressions.
+
+**Note**: condition names can only contain lower-case alphanumeric characters (`[0-9a-z]`) and dashes (`-`).
 
 You can also prefix most keys with `condition.` to represent a conditional:
 
@@ -83,9 +85,11 @@ You can also prefix most keys with `condition.` to represent a conditional:
 [target]
 type = "executable"
 sources = ["src/main.cpp"]
-windows.sources = ["src/windows_specific.cpp"]
+ptr64.sources = ["src/ptr64_only.cpp"]
 ```
 
+Instead of a named condition you can also specify a [CMake expression](https://cmake.org/cmake/help/latest/command/if.html#condition-syntax) in quotes. Instances of `$<name>` are replaced with the corresponding condition. For example: `"CONDITIONS_BUILD_TESTS AND $<linux>"` becomes `CONDITIONS_BUILD_TESTS AND (CMAKE_SYSTEM_NAME MATCHES "Linux")` in the final `CMakeLists.txt` file.
+
 ### Predefined conditions
 
 The following conditions are predefined (you can override them if you desire):
@@ -131,7 +135,7 @@ MYPROJECT_SPECIAL_OPTION = { value = true, help = "Docstring for this option." }
 MYPROJECT_BUILD_EXAMPLES = "root"
 ```
 
-Options correspond to [CMake cache variables](https://cmake.org/cmake/help/book/mastering-cmake/chapter/CMake%20Cache.html) that can be used to customize your project at configure-time. You can configure with `cmake -DMYPROJECT_BUILD_TESTS=ON` to enable the option. Every option automatically gets a corresponding [condition](#conditions).
+Options correspond to [CMake cache variables](https://cmake.org/cmake/help/book/mastering-cmake/chapter/CMake%20Cache.html) that can be used to customize your project at configure-time. You can configure with `cmake -DMYPROJECT_BUILD_TESTS=ON` to enable the option. Every option automatically gets a corresponding [condition](#conditions). Additionally, a normalized condition is created based on the `[project].name` (i.e. `MYPROJECT_BUILD_TESTS` becomes `build-tests`).
 
 The special value `root` can be used to set the option to `true` if the project is compiled as the root project (it will be `false` if someone is including your project via `[fetch-content]` or `[subdir]`).
 
@@ -149,8 +153,8 @@ Variables emit a [`set`](https://cmake.org/cmake/help/latest/command/set.html) a
 
 ```toml
 [vcpkg]
-version = "2021.05.12"
-url = "https://github.com/microsoft/vcpkg/archive/refs/tags/2021.05.12.tar.gz"
+version = "2024.03.25"
+url = "https://github.com/microsoft/vcpkg/archive/refs/tags/2024.03.25.tar.gz"
 packages = ["fmt", "zlib"]
 ```
 

docs/examples/vcpkg.md

@@ -19,7 +19,7 @@ description = "Dependencies from vcpkg"
 # See https://github.com/microsoft/vcpkg/releases for vcpkg versions
 # See https://vcpkg.io/en/packages.html for available packages
 [vcpkg]
-version = "2022.11.14"
+version = "2024.03.25"
 packages = ["fmt"]
 
 [find-package]

include/project_parser.hpp

@@ -208,6 +208,7 @@ struct Project {
     Project(const Project *parent, const std::string &path, bool build);
     const Project *root() const;
     bool cmake_minimum_version(int major, int minor) const;
+    static bool is_condition_name(const std::string &name);
 };
 
 bool is_root_path(const std::string &path);

src/cmake_generator.cpp

@@ -54,57 +54,85 @@ static std::string format(const char *format, const tsl::ordered_map<std::string
     return s;
 }
 
-static std::vector<std::string> expand_cmake_path(const fs::path &name, const fs::path &toml_dir, bool is_root_project) {
-    std::vector<std::string> temp;
-
-    auto extract_suffix = [](const fs::path &base, const fs::path &full) {
-        auto fullpath = full.string();
-        auto base_len = base.string().length();
-        auto delet = fullpath.substr(base_len + 1, fullpath.length() - base_len);
-        return delet;
+static std::vector<fs::path> expand_cmake_path(const fs::path &source_path, const fs::path &toml_dir, bool is_root_project) {
+    auto is_subdir = [](fs::path p, const fs::path &root) {
+        while (true) {
+            if (p == root) {
+                return true;
+            }
+            auto parent = p.parent_path();
+            if (parent == p) {
+                break;
+            }
+            p = parent;
+        }
+        return false;
     };
-
-    auto stem = name.filename().stem().string();
-    auto ext = name.extension();
-
-    if (is_root_project && stem == "**" && name == name.filename()) {
-        throw std::runtime_error("Recursive globbing not allowed in project root: " + name.string());
+    if (!is_subdir(fs::absolute(toml_dir / source_path), toml_dir)) {
+        throw std::runtime_error("Path traversal is not allowed: " + source_path.string());
     }
 
+    // Split the path at the first period (since fs::path::stem() and fs::path::extension() split at the last period)
+    std::string stem, extension;
+    auto filename = source_path.filename().string();
+    auto dot_position = filename.find('.');
+    if (dot_position != std::string::npos) {
+        stem = filename.substr(0, dot_position);
+        extension = filename.substr(dot_position);
+    } else {
+        stem = filename;
+    }
+
+    if (is_root_project && stem == "**" && !source_path.has_parent_path()) {
+        throw std::runtime_error("Recursive globbing not allowed in project root: " + source_path.string());
+    }
+
+    auto has_extension = [](const fs::path &file_path, const std::string &extension) {
+        auto path = file_path.string();
+        return path.rfind(extension) == path.length() - extension.length();
+    };
+
+    std::vector<fs::path> paths;
     if (stem == "*") {
-        for (const auto &f : fs::directory_iterator(toml_dir / name.parent_path(), fs::directory_options::follow_directory_symlink)) {
-            if (!f.is_directory() && f.path().extension() == ext) {
-                temp.push_back(extract_suffix(toml_dir, f));
+        for (const auto &f : fs::directory_iterator(toml_dir / source_path.parent_path(), fs::directory_options::follow_directory_symlink)) {
+            if (!f.is_directory() && has_extension(f.path(), extension)) {
+                paths.push_back(fs::relative(f, toml_dir));
             }
         }
     } else if (stem == "**") {
-        for (const auto &f : fs::recursive_directory_iterator(toml_dir / name.parent_path(), fs::directory_options::follow_directory_symlink)) {
-            if (!f.is_directory() && f.path().extension() == ext) {
-                temp.push_back(extract_suffix(toml_dir, f.path()));
+        for (const auto &f :
+             fs::recursive_directory_iterator(toml_dir / source_path.parent_path(), fs::directory_options::follow_directory_symlink)) {
+            if (!f.is_directory() && has_extension(f.path(), extension)) {
+                paths.push_back(fs::relative(f, toml_dir));
             }
         }
     } else {
-        temp.push_back(name.string());
+        paths.push_back(source_path);
     }
-    // Normalize all paths to work with CMake (it needs a / on Windows as well)
-    for (auto &path : temp) {
-        std::replace(path.begin(), path.end(), '\\', '/');
-    }
-    // Sort paths alphabetically for consistent cross-OS generation
-    std::sort(temp.begin(), temp.end());
-    return temp;
+
+    return paths;
 }
 
 static std::vector<std::string> expand_cmake_paths(const std::vector<std::string> &sources, const fs::path &toml_dir, bool is_root_project) {
-    // TODO: add duplicate checking
-    std::vector<std::string> result;
+    std::vector<std::string> paths;
     for (const auto &src : sources) {
         auto expanded = expand_cmake_path(src, toml_dir, is_root_project);
         for (const auto &f : expanded) {
-            result.push_back(f);
+            paths.push_back(f.string());
         }
     }
-    return result;
+
+    // Normalize all paths to work with CMake (it needs a / on Windows as well)
+    for (auto &path : paths) {
+        std::replace(path.begin(), path.end(), '\\', '/');
+    }
+
+    // Sort paths alphabetically for consistent cross-OS generation
+    std::sort(paths.begin(), paths.end());
+
+    // TODO: remove duplicates
+
+    return paths;
 }
 
 static void create_file(const fs::path &path, const std::string &contents) {
@@ -514,15 +542,13 @@ struct Generator {
         if (!value.empty()) {
             for (const auto &itr : value) {
                 const auto &condition = itr.first;
-                if (!condition.empty()) {
-                    cmd("if", condition)(RawArg(project.conditions.at(condition)));
-                }
+                auto endif = if_condition(condition);
 
                 if (!itr.second.empty()) {
                     fn(condition, itr.second);
                 }
 
-                if (!condition.empty()) {
+                if (endif) {
                     cmd("endif")().endl();
                 } else if (!itr.second.empty()) {
                     endl();
@@ -538,6 +564,68 @@ struct Generator {
     void conditional_cmake(const parser::Condition<std::string> &cmake) {
         handle_condition(cmake, [this](const std::string &, const std::string &cmake) { inject_cmake(cmake); });
     }
+
+    bool if_condition(const std::string &condition) {
+        if (condition.empty()) {
+            return false;
+        }
+        auto found = project.conditions.find(condition);
+        if (found == project.conditions.end()) {
+            if (cmkr::parser::Project::is_condition_name(condition)) {
+                // NOTE: this should have been caught by the parser already
+                throw std::runtime_error("Condition '" + condition + "' is not defined");
+            }
+            cmd("if", "NOTE: unnamed condition")(RawArg(cmake_condition(condition)));
+        } else {
+            cmd("if", condition)(RawArg(found->second));
+        }
+        return true;
+    }
+
+  private:
+    std::string cmake_condition(const std::string &condition) {
+        // HACK: this replaces '$<name>' with the value of the 'name' condition. We can safely
+        // reuse the generator expression syntax, because it is not valid in CMake conditions.
+        // TODO: properly handle quoted arguments (using a simple state machine):
+        // https://cmake.org/cmake/help/latest/manual/cmake-language.7.html#quoted-argument
+        std::string result = "";
+        bool in_replacement = false;
+        std::string temp;
+        for (size_t i = 0; i < condition.length(); i++) {
+            if (in_replacement) {
+                if (condition[i] == '>') {
+                    in_replacement = false;
+                    if (temp.empty()) {
+                        throw std::runtime_error("Empty replacement in condition '" + condition + "'");
+                    }
+                    auto found = project.conditions.find(temp);
+                    if (found == project.conditions.end()) {
+                        throw std::runtime_error("Unknown condition '" + temp + "' in replacement");
+                    }
+                    auto has_space = found->second.find(' ') != std::string::npos;
+                    if (has_space) {
+                        result += '(';
+                    }
+                    result += found->second;
+                    if (has_space) {
+                        result += ')';
+                    }
+                    temp.clear();
+                } else {
+                    temp += condition[i];
+                }
+            } else if (condition[i] == '$' && i + 1 < condition.length() && condition[i + 1] == '<') {
+                i++;
+                in_replacement = true;
+            } else {
+                result += condition[i];
+            }
+        }
+        if (!temp.empty()) {
+            throw std::runtime_error("Unterminated replacement in condition '" + condition + "'");
+        }
+        return result;
+    }
 };
 
 struct ConditionScope {
@@ -545,10 +633,7 @@ struct ConditionScope {
     bool endif = false;
 
     ConditionScope(Generator &gen, const std::string &condition) : gen(gen) {
-        if (!condition.empty()) {
-            gen.cmd("if", condition)(RawArg(gen.project.conditions.at(condition)));
-            endif = true;
-        }
+        endif = gen.if_condition(condition);
     }
 
     ConditionScope(const ConditionScope &) = delete;
@@ -596,7 +681,10 @@ static std::string vcpkg_escape_identifier(const std::string &name) {
             ch = '-';
         }
 
-        escaped += std::tolower(ch);
+        if (ch >= 'A' && ch <= 'Z') {
+            ch += ('a' - 'A');
+        }
+        escaped += ch;
     }
     if (!vcpkg_valid_identifier(escaped)) {
         throw std::runtime_error("The escaped project name '" + escaped + "' is not usable with [vcpkg]");
@@ -617,7 +705,7 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
 
     parser::Project project(parent_project, path, false);
 
-    for (auto const &lang : project.project_languages) {
+    for (const auto &lang : project.project_languages) {
         if (known_languages.find(lang) == known_languages.end()) {
             if (project.project_allow_unknown_languages) {
                 printf("[warning] Unknown language '%s' specified\n", lang.c_str());
@@ -643,23 +731,6 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
     if (is_root_project) {
         cmd("cmake_minimum_required")("VERSION", project.cmake_version).endl();
 
-        if (project.project_msvc_runtime != parser::msvc_last) {
-            comment("Enable support for MSVC_RUNTIME_LIBRARY");
-            cmd("cmake_policy")("SET", "CMP0091", "NEW");
-
-            switch (project.project_msvc_runtime) {
-            case parser::msvc_dynamic:
-                cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL");
-                break;
-            case parser::msvc_static:
-                cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>");
-                break;
-            default:
-                break;
-            }
-            endl();
-        }
-
         // clang-format on
         if (!project.allow_in_tree) {
             // clang-format off
@@ -690,6 +761,26 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
         cmd("endif")().endl();
         // clang-format on
 
+        if (project.project_msvc_runtime != parser::msvc_last) {
+            comment("Enable support for MSVC_RUNTIME_LIBRARY");
+            cmd("cmake_policy")("SET", "CMP0091", "NEW");
+
+            // clang-format off
+            cmd("if")("NOT", "DEFINED", "CMAKE_MSVC_RUNTIME_LIBRARY");
+                switch (project.project_msvc_runtime) {
+                case parser::msvc_dynamic:
+                    cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL");
+                    break;
+                case parser::msvc_static:
+                    cmd("set")("CMAKE_MSVC_RUNTIME_LIBRARY", "MultiThreaded$<$<CONFIG:Debug>:Debug>");
+                    break;
+                default:
+                    break;
+                }
+            cmd("endif")().endl();
+            // clang-format on
+        }
+
         fs::path cmkr_include(project.cmkr_include);
         if (!project.cmkr_include.empty() && !fs::exists(cmkr_include) && cmkr_include.is_relative()) {
             create_file(cmkr_include, resources::cmkr);
@@ -814,19 +905,20 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
         cmd("if")("CMKR_ROOT_PROJECT", "AND", "NOT", "CMKR_DISABLE_VCPKG");
             cmd("include")("FetchContent");
             comment("Fix warnings about DOWNLOAD_EXTRACT_TIMESTAMP");
-            // clang-format off
             cmd("if")("POLICY", "CMP0135");
                 cmd("cmake_policy")("SET", "CMP0135", "NEW");
             cmd("endif")();
-        // clang-format on
-        cmd("message")("STATUS", "Fetching vcpkg (" + version_name + ")...");
-        cmd("FetchContent_Declare")("vcpkg", "URL", url);
-        // Not using FetchContent_MakeAvailable here in case vcpkg adds CMakeLists.txt
-        cmd("FetchContent_GetProperties")("vcpkg");
-        cmd("if")("NOT", "vcpkg_POPULATED");
-        cmd("FetchContent_Populate")("vcpkg");
-        cmd("include")("${vcpkg_SOURCE_DIR}/scripts/buildsystems/vcpkg.cmake");
-        cmd("endif")();
+            cmd("message")("STATUS", "Fetching vcpkg (" + version_name + ")...");
+            cmd("FetchContent_Declare")("vcpkg", "URL", url);
+            // Not using FetchContent_MakeAvailable here in case vcpkg adds CMakeLists.txt
+            cmd("FetchContent_GetProperties")("vcpkg");
+            cmd("if")("NOT", "vcpkg_POPULATED");
+                cmd("FetchContent_Populate")("vcpkg");
+                cmd("if")("CMAKE_HOST_SYSTEM_NAME", "STREQUAL", "Darwin", "AND", "CMAKE_OSX_ARCHITECTURES", "STREQUAL", RawArg("\"\""));
+                    cmd("set")("CMAKE_OSX_ARCHITECTURES", "${CMAKE_HOST_SYSTEM_PROCESSOR}", "CACHE", "STRING", RawArg("\"\""), "FORCE");
+                cmd("endif")();
+                cmd("include")("${vcpkg_SOURCE_DIR}/scripts/buildsystems/vcpkg.cmake");
+            cmd("endif")();
         cmd("endif")();
         endl();
         // clang-format on
@@ -900,6 +992,20 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
         ofs << "}\n";
     }
 
+    if (!project.packages.empty()) {
+        comment("Packages");
+        for (const auto &dep : project.packages) {
+            auto version = dep.version;
+            if (version == "*")
+                version.clear();
+            auto required = dep.required ? "REQUIRED" : "";
+            auto config = dep.config ? "CONFIG" : "";
+            auto components = std::make_pair("COMPONENTS", dep.components);
+            ConditionScope cs(gen, dep.condition);
+            cmd("find_package")(dep.name, version, required, config, components).endl();
+        }
+    }
+
     if (!project.contents.empty()) {
         cmd("include")("FetchContent").endl();
         if (!project.root()->vcpkg.enabled()) {
@@ -935,20 +1041,6 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
         }
     }
 
-    if (!project.packages.empty()) {
-        comment("Packages");
-        for (const auto &dep : project.packages) {
-            auto version = dep.version;
-            if (version == "*")
-                version.clear();
-            auto required = dep.required ? "REQUIRED" : "";
-            auto config = dep.config ? "CONFIG" : "";
-            auto components = std::make_pair("COMPONENTS", dep.components);
-            ConditionScope cs(gen, dep.condition);
-            cmd("find_package")(dep.name, version, required, config, components).endl();
-        }
-    }
-
     auto add_subdir = [&](const std::string &dir) {
         // clang-format off
         comment("Subdirectory: " + dir);

src/project_parser.cpp

@@ -140,7 +140,7 @@ class TomlChecker {
         for (const auto &itr : m_v.as_table()) {
             const auto &ky = itr.first;
             if (m_conditionVisited.contains(ky)) {
-                if (!conditions.contains(ky)) {
+                if (!conditions.contains(ky) && Project::is_condition_name(ky)) {
                     throw_key_error("Unknown condition '" + ky + "'", ky, itr.second);
                 }
 
@@ -160,7 +160,7 @@ class TomlChecker {
                 throw_key_error("Unknown key '" + ky + "'", ky, itr.second);
             } else if (ky == "condition") {
                 std::string condition = itr.second.as_string();
-                if (!conditions.contains(condition)) {
+                if (!conditions.contains(condition) && Project::is_condition_name(condition)) {
                     throw_key_error("Unknown condition '" + condition + "'", condition, itr.second);
                 }
             }
@@ -282,6 +282,9 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
     if (checker.contains("conditions")) {
         auto conds = toml::find<decltype(conditions)>(toml, "conditions");
         for (const auto &cond : conds) {
+            if (!is_condition_name(cond.first)) {
+                throw_key_error("Invalid condition name '" + cond.first + "'", cond.first, toml::find(toml::find(toml, "conditions"), cond.first));
+            }
             conditions[cond.first] = cond.second;
         }
     }
@@ -372,6 +375,25 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
     }
 
     if (checker.contains("options")) {
+        auto normalize = [](const std::string &name) {
+            std::string normalized;
+            for (char ch : name) {
+                if (ch == '_') {
+                    normalized += '-';
+                } else if (ch >= 'A' && ch <= 'Z') {
+                    ch += ('a' - 'A');
+                    normalized += ch;
+                } else if (ch == '-' || (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z')) {
+                    normalized += ch;
+                } else {
+                    // Ignore all other characters
+                }
+            }
+            return normalized;
+        };
+        auto nproject_prefix = normalize(project_name);
+        nproject_prefix += '-';
+
         using opts_map = tsl::ordered_map<std::string, TomlBasicValue>;
         const auto &opts = toml::find<opts_map>(toml, "options");
         for (const auto &itr : opts) {
@@ -409,7 +431,18 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
                 throw_key_error(toml::concat_to_string("Unsupported value type: ", itr.second.type()), itr.first, itr.second);
             }
             options.push_back(o);
-            conditions.emplace(o.name, o.name);
+
+            // Add an implicit condition for the option
+            auto ncondition = normalize(o.name);
+            if (ncondition.find(nproject_prefix) == 0) {
+                ncondition = ncondition.substr(nproject_prefix.size());
+            }
+            if (!ncondition.empty()) {
+                if (conditions.contains(ncondition)) {
+                    print_key_warning("Option '" + o.name + "' would create a condition '" + ncondition + "' that already exists", o.name, value);
+                }
+                conditions.emplace(ncondition, o.name);
+            }
         }
     }
 
@@ -500,8 +533,11 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
                     key = "URL";
                 } else if (hash_algorithms.contains(key)) {
                     std::string algo;
-                    for (auto c : key) {
-                        algo.push_back(std::toupper(c));
+                    for (auto ch : key) {
+                        if (ch >= 'a' && ch <= 'z') {
+                            ch -= ('a' - 'A');
+                        }
+                        algo.push_back(ch);
                     }
                     key = "URL_HASH";
                     value = algo + "=" + value;
@@ -639,28 +675,28 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
 
         Condition<std::string> msvc_runtime;
         t.optional("msvc-runtime", msvc_runtime);
-        for (const auto &condItr : msvc_runtime) {
-            switch (parse_msvcRuntimeType(condItr.second)) {
+        for (const auto &cond_itr : msvc_runtime) {
+            switch (parse_msvcRuntimeType(cond_itr.second)) {
             case msvc_dynamic:
-                target.properties[condItr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL";
+                target.properties[cond_itr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>DLL";
                 break;
             case msvc_static:
-                target.properties[condItr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>";
+                target.properties[cond_itr.first]["MSVC_RUNTIME_LIBRARY"] = "MultiThreaded$<$<CONFIG:Debug>:Debug>";
                 break;
             default: {
-                std::string error = "Unknown runtime '" + condItr.second + "'\n";
+                std::string error = "Unknown runtime '" + cond_itr.second + "'\n";
                 error += "Available types:\n";
                 for (std::string type_name : msvcRuntimeTypeNames) {
                     error += "  - " + type_name + "\n";
                 }
                 error.pop_back(); // Remove last newline
                 const TomlBasicValue *report;
-                if (condItr.first.empty()) {
+                if (cond_itr.first.empty()) {
                     report = &t.find("msvc-runtime");
                 } else {
-                    report = &t.find(condItr.first).as_table().find("msvc-runtime").value();
+                    report = &t.find(cond_itr.first).as_table().find("msvc-runtime").value();
                 }
-                throw_key_error(error, condItr.second, *report);
+                throw_key_error(error, cond_itr.second, *report);
             }
             }
         }
@@ -833,6 +869,16 @@ bool Project::cmake_minimum_version(int major, int minor) const {
     return std::tie(root_major, root_minor) >= std::tie(major, minor);
 }
 
+bool Project::is_condition_name(const std::string &name) {
+    auto is_named_condition = true;
+    for (auto ch : name) {
+        if (!(ch == '-' || (ch >= '0' && ch <= '9') || (ch >= 'a' && ch <= 'z'))) {
+            return false;
+        }
+    }
+    return true;
+}
+
 bool is_root_path(const std::string &path) {
     const auto toml_path = fs::path(path) / "cmake.toml";
     if (!fs::exists(toml_path)) {

tests/conditions/cmake.toml

@@ -2,6 +2,9 @@
 name = "conditions"
 cmake-after = "set(CUSTOM ON)"
 
+[options]
+CONDITIONS_BUILD_TESTS = "root"
+
 [conditions]
 custom = "CUSTOM"
 
@@ -15,6 +18,8 @@ macos.cmake-after = "message(STATUS macos-after)"
 linux.cmake-after = "message(STATUS linux-after)"
 unix.cmake-after = "message(STATUS unix-after)"
 custom.cmake-after = "message(STATUS custom-after)"
+build-tests.cmake-after = "message(STATUS build-tests)"
+"CONDITIONS_BUILD_TESTS AND $<linux>".cmake-after = "message(STATUS linux-tests)"
 
 [target.example.properties]
 AUTOMOC = false

tests/globbing/mylib/include/mylib/mylib.hpp

@@ -4,4 +4,4 @@
 
 namespace mylib {
 std::string message();
-}
+} // namespace mylib

tests/vcpkg/cmake.toml

@@ -7,7 +7,7 @@ description = "Dependencies from vcpkg"
 # See https://github.com/microsoft/vcpkg/releases for vcpkg versions
 # See https://vcpkg.io/en/packages.html for available packages
 [vcpkg]
-version = "2022.11.14"
+version = "2024.03.25"
 packages = ["fmt"]
 
 [find-package]

third_party/CMakeLists.txt

@@ -16,7 +16,3 @@ target_include_directories(toml11 INTERFACE toml11-3.6.0)
 # https://github.com/mpark/variant (BSL-1.0)
 add_library(mpark_variant INTERFACE)
 target_include_directories(mpark_variant INTERFACE variant-1.4.0/include)
-
-# https://github.com/nlohmann/json (MIT)
-add_library(nlohmann_json INTERFACE)
-target_include_directories(nlohmann_json INTERFACE nlohmann-3.9.1/include)

third_party/nlohmann-3.9.1/LICENSE

@@ -1,21 +0,0 @@
-MIT License 
-
-Copyright (c) 2013-2021 Niels Lohmann
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.