Pipe --list* through reporters

This allows us to provide machine-readable listings through the
XMLReporter and it will also allow users to define their own listing
format that does whatever their own tools need.

include/internal/catch_interfaces_reporter.cpp

@@ -6,7 +6,13 @@
  */
 
 #include "catch_interfaces_reporter.h"
+#include "catch_console_colour.h"
 #include "../reporters/catch_reporter_listening.h"
+#include "catch_list.h"
+#include "catch_text.h"
+
+#include <algorithm>
+#include <iomanip>
 
 namespace Catch {
 
@@ -108,6 +114,86 @@ namespace Catch {
     void IStreamingReporter::fatalErrorEncountered( StringRef ) {}
     bool IStreamingReporter::isMulti() const { return false; }
 
+    void IStreamingReporter::listReporters(std::vector<ReporterDescription> const& descriptions, Config const& config) {
+        Catch::cout() << "Available reporters:\n";
+        const auto maxNameLen = std::max_element(descriptions.begin(), descriptions.end(),
+            [](ReporterDescription const& lhs, ReporterDescription const& rhs) { return lhs.name.size() < rhs.name.size(); })
+            ->name.size();
+
+        for (auto const& desc : descriptions) {
+            if (config.verbosity() == Verbosity::Quiet) {
+                Catch::cout()
+                    << Column(desc.name)
+                    .indent(2)
+                    .width(5 + maxNameLen) << '\n';
+            } else {
+                Catch::cout()
+                    << Column(desc.name + ":")
+                    .indent(2)
+                    .width(5 + maxNameLen)
+                    + Column(desc.description)
+                    .initialIndent(0)
+                    .indent(2)
+                    .width(CATCH_CONFIG_CONSOLE_WIDTH - maxNameLen - 8)
+                    << '\n';
+            }
+        }
+        Catch::cout() << std::endl;
+    }
+
+    void IStreamingReporter::listTests(std::vector<TestCase> const& tests, Config const& config) {
+        if (config.hasTestFilters())
+            Catch::cout() << "Matching test cases:\n";
+        else {
+            Catch::cout() << "All available test cases:\n";
+        }
+
+        for (auto const& testCaseInfo : tests) {
+            Colour::Code colour = testCaseInfo.isHidden()
+                ? Colour::SecondaryText
+                : Colour::None;
+            Colour colourGuard(colour);
+
+            Catch::cout() << Column(testCaseInfo.name).initialIndent(2).indent(4) << '\n';
+            if (config.verbosity() >= Verbosity::High) {
+                Catch::cout() << Column(Catch::Detail::stringify(testCaseInfo.lineInfo)).indent(4) << std::endl;
+                std::string description = testCaseInfo.description;
+                if (description.empty())
+                    description = "(NO DESCRIPTION)";
+                Catch::cout() << Column(description).indent(4) << std::endl;
+            }
+            if (!testCaseInfo.tags.empty() && config.verbosity() > Verbosity::Quiet) {
+                Catch::cout() << Column(testCaseInfo.tagsAsString()).indent(6) << '\n';
+            }
+        }
+
+        if (!config.hasTestFilters()) {
+            Catch::cout() << pluralise(tests.size(), "test case") << '\n' << std::endl;
+        } else {
+            Catch::cout() << pluralise(tests.size(), "matching test case") << '\n' << std::endl;
+        }
+    }
+
+    void IStreamingReporter::listTags(std::vector<TagInfo> const& tags, Config const& config) {
+        if (config.hasTestFilters()) {
+            Catch::cout() << "Tags for matching test cases:\n";
+        } else {
+            Catch::cout() << "All available tags:\n";
+        }
+
+        for (auto const& tagCount : tags) {
+            ReusableStringStream rss;
+            rss << "  " << std::setw(2) << tagCount.count << "  ";
+            auto str = rss.str();
+            auto wrapper = Column(tagCount.all())
+                .initialIndent(0)
+                .indent(str.size())
+                .width(CATCH_CONFIG_CONSOLE_WIDTH - 10);
+            Catch::cout() << str << wrapper << '\n';
+        }
+        Catch::cout() << pluralise(tags.size(), "tag") << '\n' << std::endl;
+    }
+
     IReporterFactory::~IReporterFactory() = default;
     IReporterRegistry::~IReporterRegistry() = default;
 

include/internal/catch_interfaces_reporter.h

@@ -33,6 +33,9 @@
 
 namespace Catch {
 
+    struct ReporterDescription;
+    struct TagInfo;
+
     struct ReporterConfig {
         explicit ReporterConfig( IConfigPtr const& _fullConfig );
 
@@ -244,6 +247,12 @@ namespace Catch {
         virtual void fatalErrorEncountered( StringRef name );
 
         virtual bool isMulti() const;
+
+        // Listing support
+        virtual void listReporters(std::vector<ReporterDescription> const& descriptions, Config const& config);
+        virtual void listTests(std::vector<TestCase> const& tests, Config const& config);
+        virtual void listTags(std::vector<TagInfo> const& tags, Config const& config);
+
     };
     using IStreamingReporterPtr = std::unique_ptr<IStreamingReporter>;
 

include/internal/catch_list.cpp

@@ -23,65 +23,22 @@
 
 #include <limits>
 #include <algorithm>
-#include <iomanip>
 #include <set>
 
 namespace Catch {
     namespace {
 
-        struct TagInfo {
-            void add(std::string const& spelling);
-            std::string all() const;
-
-            std::set<std::string> spellings;
-            std::size_t count = 0;
-        };
-
-
-        void listTests(Config const& config) {
+        void listTests(IStreamingReporter& reporter, Config const& config) {
             TestSpec testSpec = config.testSpec();
-            if (config.hasTestFilters())
-                Catch::cout() << "Matching test cases:\n";
-            else {
-                Catch::cout() << "All available test cases:\n";
-            }
-
             auto matchedTestCases = filterTests(getAllTestCasesSorted(config), testSpec, config);
-            for (auto const& testCaseInfo : matchedTestCases) {
-                Colour::Code colour = testCaseInfo.isHidden()
-                    ? Colour::SecondaryText
-                    : Colour::None;
-                Colour colourGuard(colour);
-
-                Catch::cout() << Column(testCaseInfo.name).initialIndent(2).indent(4) << "\n";
-                if (config.verbosity() >= Verbosity::High) {
-                    Catch::cout() << Column(Catch::Detail::stringify(testCaseInfo.lineInfo)).indent(4) << std::endl;
-                    std::string description = testCaseInfo.description;
-                    if (description.empty())
-                        description = "(NO DESCRIPTION)";
-                    Catch::cout() << Column(description).indent(4) << std::endl;
-                }
-                if (!testCaseInfo.tags.empty())
-                    Catch::cout() << Column(testCaseInfo.tagsAsString()).indent(6) << "\n";
+            reporter.listTests(matchedTestCases, config);
         }
 
-            if (!config.hasTestFilters())
-                Catch::cout() << pluralise(matchedTestCases.size(), "test case") << '\n' << std::endl;
-            else
-                Catch::cout() << pluralise(matchedTestCases.size(), "matching test case") << '\n' << std::endl;
-        }
-
-        void listTags(Config const& config) {
+        void listTags(IStreamingReporter& reporter, Config const& config) {
             TestSpec testSpec = config.testSpec();
-            if (config.hasTestFilters())
-                Catch::cout() << "Tags for matching test cases:\n";
-            else {
-                Catch::cout() << "All available tags:\n";
-            }
+            std::vector<TestCase> matchedTestCases = filterTests(getAllTestCasesSorted(config), testSpec, config);
 
             std::map<std::string, TagInfo> tagCounts;
-
-            std::vector<TestCase> matchedTestCases = filterTests(getAllTestCasesSorted(config), testSpec, config);
             for (auto const& testCase : matchedTestCases) {
                 for (auto const& tagName : testCase.getTestCaseInfo().tags) {
                     std::string lcaseTagName = toLower(tagName);
@@ -92,38 +49,24 @@ namespace Catch {
                 }
             }
 
-            for (auto const& tagCount : tagCounts) {
-                ReusableStringStream rss;
-                rss << "  " << std::setw(2) << tagCount.second.count << "  ";
-                auto str = rss.str();
-                auto wrapper = Column(tagCount.second.all())
-                    .initialIndent(0)
-                    .indent(str.size())
-                    .width(CATCH_CONFIG_CONSOLE_WIDTH - 10);
-                Catch::cout() << str << wrapper << '\n';
-            }
-            Catch::cout() << pluralise(tagCounts.size(), "tag") << '\n' << std::endl;
+            std::vector<TagInfo> infos; infos.reserve(tagCounts.size());
+            for (auto const& tagc : tagCounts) {
+                infos.push_back(std::move(tagc.second));
             }
 
-        void listReporters() {
-            Catch::cout() << "Available reporters:\n";
+            reporter.listTags(infos, config);
+        }
+
+        void listReporters(IStreamingReporter& reporter, Config const& config) {
+            std::vector<ReporterDescription> descriptions;
+
             IReporterRegistry::FactoryMap const& factories = getRegistryHub().getReporterRegistry().getFactories();
-            std::size_t maxNameLen = 0;
-            for (auto const& factoryKvp : factories)
-                maxNameLen = (std::max)(maxNameLen, factoryKvp.first.size());
-
-            for (auto const& factoryKvp : factories) {
-                Catch::cout()
-                    << Column(factoryKvp.first + ":")
-                    .indent(2)
-                    .width(5 + maxNameLen)
-                    + Column(factoryKvp.second->getDescription())
-                    .initialIndent(0)
-                    .indent(2)
-                    .width(CATCH_CONFIG_CONSOLE_WIDTH - maxNameLen - 8)
-                    << "\n";
+            descriptions.reserve(factories.size());
+            for (auto const& fac : factories) {
+                descriptions.push_back({ fac.first, fac.second->getDescription() });
             }
-            Catch::cout() << std::endl;
+
+            reporter.listReporters(descriptions, config);
         }
 
     } // end anonymous namespace
@@ -149,20 +92,20 @@ namespace Catch {
         return out;
     }
 
-    bool list( std::shared_ptr<Config> const& config ) {
+    bool list( IStreamingReporter& reporter, std::shared_ptr<Config> const& config ) {
         bool listed = false;
         getCurrentMutableContext().setConfig( config );
         if (config->listTests()) {
             listed = true;
-            listTests(*config);
+            listTests(reporter, *config);
         }
         if (config->listTags()) {
             listed = true;
-            listTags(*config);
+            listTags(reporter, *config);
         }
         if (config->listReporters()) {
             listed = true;
-            listReporters();
+            listReporters(reporter, *config);
         }
         return listed;
     }

include/internal/catch_list.h

@@ -10,9 +10,29 @@
 
 #include "catch_config.hpp"
 
+#include <set>
+#include <string>
+
+
 namespace Catch {
 
-    bool list( std::shared_ptr<Config> const& config );
+    struct IStreamingReporter;
+
+    struct ReporterDescription {
+        std::string name, description;
+    };
+
+    struct TagInfo {
+        void add(std::string const& spelling);
+        std::string all() const;
+
+        std::set<std::string> spellings;
+        std::size_t count = 0;
+    };
+
+    struct testClassInfo {};
+
+    bool list( IStreamingReporter& reporter, std::shared_ptr<Config> const& config );
 
 } // end namespace Catch
 

include/internal/catch_session.cpp

@@ -62,9 +62,9 @@ namespace Catch {
 
         class TestGroup {
         public:
-            explicit TestGroup(std::shared_ptr<Config> const& config)
+            explicit TestGroup(IStreamingReporterPtr&& reporter, std::shared_ptr<Config> const& config)
             : m_config{config}
-            , m_context{config, makeReporter(config)}
+            , m_context{config, std::move(reporter)}
             {
                 auto const& allTestCases = getAllTestCasesSorted(*m_config);
                 m_matches = m_config->testSpec().matchesByFilter(allTestCases, *m_config);
@@ -287,12 +287,15 @@ namespace Catch {
             if( m_configData.filenamesAsTags )
                 applyFilenamesAsTags( *m_config );
 
+            // Create reporter(s) so we can route listings through them
+            auto reporter = makeReporter(m_config);
+
             // Handle list request
-            if (list(m_config)) {
+            if (list(*reporter, m_config)) {
                 return 0;
             }
 
-            TestGroup tests { m_config };
+            TestGroup tests { std::move(reporter), m_config };
             auto const totals = tests.execute();
 
             if( m_config->warnAboutNoTests() && totals.error == -1 )