From e9480a625f34ec96130d6854def38406ecebcafb Mon Sep 17 00:00:00 2001
From: Duncan Ogilvie <mr.exodia.tpodt@gmail.com>
Date: Wed, 27 Nov 2024 14:13:37 +0100
Subject: [PATCH] Allow disabling default features with vcpkg

---
 docs/cmake-toml.md         | 2 +-
 include/project_parser.hpp | 1 +
 src/cmake_generator.cpp    | 7 +++++--
 src/project_parser.cpp     | 7 ++++++-
 4 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/docs/cmake-toml.md b/docs/cmake-toml.md
index 8d9355a..ff242d1 100644
--- a/docs/cmake-toml.md
+++ b/docs/cmake-toml.md
@@ -168,7 +168,7 @@ overlay-ports = ["my-ports"]
 
 The vcpkg `version` will automatically generate the `url` from the [official repository](https://github.com/microsoft/vcpkg/releases). For a custom registry you can specify your own `url` (and omit the `version`). You can browse available packages on [vcpkg.io](https://vcpkg.io/en/packages.html).
 
-To specify package features you can use the following syntax: `imgui[docking-experimental,freetype,sdl2-binding,opengl3-binding]`.
+To specify package features you can use the following syntax: `imgui[docking-experimental,freetype,sdl2-binding,opengl3-binding]`. To disable the [default features](https://learn.microsoft.com/en-us/vcpkg/concepts/default-features) you can do: `cpp-httplib[core,openssl]`
 
 The `overlay-ports` feature allows you to embed vcpkg ports inside your project, without having to fork the main vcpkg registry or creating a custom registry. You can find more information in the relevant [documentation](https://learn.microsoft.com/en-us/vcpkg/concepts/overlay-ports).
 
diff --git a/include/project_parser.hpp b/include/project_parser.hpp
index debaab1..4de3870 100644
--- a/include/project_parser.hpp
+++ b/include/project_parser.hpp
@@ -45,6 +45,7 @@ struct Vcpkg {
     struct Package {
         std::string name;
         std::vector<std::string> features;
+        bool default_features = true;
     };
 
     std::vector<Package> packages;
diff --git a/src/cmake_generator.cpp b/src/cmake_generator.cpp
index 69b34fa..436985c 100644
--- a/src/cmake_generator.cpp
+++ b/src/cmake_generator.cpp
@@ -957,17 +957,20 @@ void generate_cmake(const char *path, const parser::Project *parent_project) {
                     throw std::runtime_error("Invalid vcpkg package feature '" + feature + "', name is reserved");
                 }
             }
-            if (features.empty()) {
+            if (features.empty() && package.default_features) {
                 ofs << "    \"" << package.name << '\"';
             } else {
                 ofs << "    {\n";
                 ofs << "      \"name\": \"" << package.name << "\",\n";
+                if (!package.default_features) {
+                    ofs << "      \"default-features\": false,\n";
+                }
                 ofs << "      \"features\": [";
                 for (size_t j = 0; j < features.size(); j++) {
                     const auto &feature = features[j];
                     ofs << '\"' << feature << '\"';
                     if (j + 1 < features.size()) {
-                        ofs << ',';
+                        ofs << ", ";
                     }
                 }
                 ofs << "]\n";
diff --git a/src/project_parser.cpp b/src/project_parser.cpp
index 822ca53..38a1b04 100644
--- a/src/project_parser.cpp
+++ b/src/project_parser.cpp
@@ -847,7 +847,12 @@ Project::Project(const Project *parent, const std::string &path, bool build) : p
                 std::istringstream feature_stream{features};
                 std::string feature;
                 while (std::getline(feature_stream, feature, ',')) {
-                    package.features.emplace_back(feature);
+                    // Disable default features with package-name[core,feature1]
+                    if (feature == "core") {
+                        package.default_features = false;
+                    } else {
+                        package.features.emplace_back(feature);
+                    }
                 }
             } else {
                 throw_key_error("Invalid package name '" + package_str + "'", "packages", p);