[vcpkg] Replace explicit bulk operations with fmap

toolsrc/include/vcpkg_Input.h

@@ -5,11 +5,10 @@
 
 namespace vcpkg::Input
 {
-    package_spec check_and_get_package_spec(const std::string& package_spec_as_string, const triplet& default_target_triplet, const std::string& example_text);
-
-    std::vector<package_spec> check_and_get_package_specs(const std::vector<std::string>& package_specs_as_strings, const triplet& default_target_triplet, const std::string& example_text);
+    package_spec check_and_get_package_spec(
+        const std::string& package_spec_as_string,
+        const triplet& default_target_triplet,
+        cstring_view example_text);
 
     void check_triplet(const triplet& t, const vcpkg_paths& paths);
-
-    void check_triplets(const std::vector<package_spec>& triplets, const vcpkg_paths& paths);
 }

toolsrc/include/vcpkg_Util.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <vector>
+#include <utility>
+
+namespace vcpkg::Util
+{
+    template<class Cont, class Func>
+    using FmapOut = decltype(std::declval<Func>()(std::declval<Cont>()[0]));
+
+    template<class Cont, class Func, class Out = FmapOut<Cont, Func>>
+    std::vector<Out> fmap(const Cont& xs, Func&& f)
+    {
+        using O = decltype(f(xs[0]));
+
+        std::vector<O> ret;
+        ret.reserve(xs.size());
+
+        for (auto&& x : xs)
+            ret.push_back(f(x));
+
+        return ret;
+    }
+}

toolsrc/src/commands_install.cpp

@@ -6,6 +6,7 @@
 #include "vcpkg_System.h"
 #include "vcpkg_Dependencies.h"
 #include "vcpkg_Input.h"
+#include "vcpkg_Util.h"
 #include "Paragraphs.h"
 
 namespace vcpkg::Commands::Install
@@ -185,16 +186,25 @@ namespace vcpkg::Commands::Install
 
     void perform_and_exit(const vcpkg_cmd_arguments& args, const vcpkg_paths& paths, const triplet& default_target_triplet)
     {
+        // input sanitization
         static const std::string example = Commands::Help::create_example_string("install zlib zlib:x64-windows curl boost");
         args.check_min_arg_count(1, example);
-        std::vector<package_spec> specs = Input::check_and_get_package_specs(args.command_arguments, default_target_triplet, example);
-        Input::check_triplets(specs, paths);
+
+        auto specs = Util::fmap(args.command_arguments, [&](auto&& arg)
+        {
+            auto spec = Input::check_and_get_package_spec(arg, default_target_triplet, example);
+            Input::check_triplet(spec.target_triplet(), paths);
+            return spec;
+        });
+
         args.check_and_get_optional_command_arguments({});
 
+        // create the plan
         StatusParagraphs status_db = database_load_check(paths);
         std::vector<package_spec_with_install_plan> install_plan = Dependencies::create_install_plan(paths, specs, status_db);
         Checks::check_exit(VCPKG_LINE_INFO, !install_plan.empty(), "Install plan cannot be empty");
 
+        // log the plan
         std::string specs_string = install_plan[0].spec.toString();
         for (size_t i = 1; i < install_plan.size(); ++i)
         {
@@ -203,6 +213,7 @@ namespace vcpkg::Commands::Install
         }
         TrackProperty("installplan", specs_string);
 
+        // execute the plan
         for (const package_spec_with_install_plan& action : install_plan)
         {
             try

toolsrc/src/commands_remove.cpp

@@ -4,6 +4,7 @@
 #include "vcpkg_System.h"
 #include "vcpkg_Input.h"
 #include "vcpkg_Dependencies.h"
+#include "vcpkg_Util.h"
 
 namespace vcpkg::Commands::Remove
 {
@@ -168,8 +169,14 @@ namespace vcpkg::Commands::Remove
     {
         static const std::string example = Commands::Help::create_example_string("remove zlib zlib:x64-windows curl boost");
         args.check_min_arg_count(1, example);
-        std::vector<package_spec> specs = Input::check_and_get_package_specs(args.command_arguments, default_target_triplet, example);
-        Input::check_triplets(specs, paths);
+
+        auto specs = Util::fmap(args.command_arguments, [&](auto&& arg)
+        {
+            auto spec = Input::check_and_get_package_spec(arg, default_target_triplet, example);
+            Input::check_triplet(spec.target_triplet(), paths);
+            return spec;
+        });
+
         const std::unordered_set<std::string> options = args.check_and_get_optional_command_arguments({ OPTION_PURGE, OPTION_RECURSE, OPTION_DRY_RUN });
         const bool alsoRemoveFolderFromPackages = options.find(OPTION_PURGE) != options.end();
         const bool isRecursive = options.find(OPTION_RECURSE) != options.end();

toolsrc/src/vcpkg_Input.cpp

@@ -6,7 +6,7 @@
 
 namespace vcpkg::Input
 {
-    package_spec check_and_get_package_spec(const std::string& package_spec_as_string, const triplet& default_target_triplet, const std::string& example_text)
+    package_spec check_and_get_package_spec(const std::string& package_spec_as_string, const triplet& default_target_triplet, cstring_view example_text)
     {
         const std::string as_lowercase = Strings::ascii_to_lowercase(package_spec_as_string);
         expected<package_spec> expected_spec = package_spec::from_string(as_lowercase, default_target_triplet);
@@ -21,17 +21,6 @@ namespace vcpkg::Input
         Checks::exit_fail(VCPKG_LINE_INFO);
     }
 
-    std::vector<package_spec> check_and_get_package_specs(const std::vector<std::string>& package_specs_as_strings, const triplet& default_target_triplet, const std::string& example_text)
-    {
-        std::vector<package_spec> specs;
-        for (const std::string& spec : package_specs_as_strings)
-        {
-            specs.push_back(check_and_get_package_spec(spec, default_target_triplet, example_text));
-        }
-
-        return specs;
-    }
-
     void check_triplet(const triplet& t, const vcpkg_paths& paths)
     {
         if (!paths.is_valid_triplet(t))
@@ -42,12 +31,4 @@ namespace vcpkg::Input
             Checks::exit_fail(VCPKG_LINE_INFO);
         }
     }
-
-    void check_triplets(const std::vector<package_spec>& triplets, const vcpkg_paths& paths)
-    {
-        for (const package_spec& spec : triplets)
-        {
-            check_triplet(spec.target_triplet(), paths);
-        }
-    }
 }

toolsrc/vcpkglib/vcpkglib.vcxproj

@@ -178,6 +178,7 @@
     <ClInclude Include="..\include\vcpkg_paths.h" />
     <ClInclude Include="..\include\vcpkg_Strings.h" />
     <ClInclude Include="..\include\vcpkg_System.h" />
+    <ClInclude Include="..\include\vcpkg_Util.h" />
     <ClInclude Include="..\include\version_t.h" />
   </ItemGroup>
   <ItemGroup>

toolsrc/vcpkglib/vcpkglib.vcxproj.filters

@@ -308,5 +308,8 @@
     <ClInclude Include="..\include\version_t.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\include\vcpkg_Util.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
 </Project>