ci(app): run clang-tidy (#8442)

* fix(app): clang-tidy warnings

* build(app): convert checks to list

* build(app): fix clang-tidy `HeaderFilterRegex`

* ci(app): run clang-tidy

* fix: ftbfs

* wtf

.github/workflows/actions.yml

@@ -234,7 +234,9 @@ jobs:
   clang-tidy-libtransmission:
     runs-on: ubuntu-24.04
     needs: [ what-to-make ]
-    if: ${{ needs.what-to-make.outputs.make-core == 'true' || needs.what-to-make.outputs.make-tests == 'true' }}
+    if: |
+      needs.what-to-make.outputs.make-core ||
+      needs.what-to-make.outputs.make-tests
     steps:
       - name: Show Configuration
         run: |
@@ -261,7 +263,7 @@ jobs:
             -DCMAKE_CXX_COMPILER='clang++' \
             -DCMAKE_C_COMPILER='clang' \
             -DCMAKE_INSTALL_PREFIX=pfx \
-            -DENABLE_TESTS=${{ (needs.what-to-make.outputs.make-tests == 'true') && 'ON' || 'OFF' }} \
+            -DENABLE_TESTS=${{ needs.what-to-make.outputs.make-tests && 'ON' || 'OFF' }} \
             -DRUN_CLANG_TIDY=ON \
             -DUSE_SYSTEM_DEFAULT=ON \
             -DUSE_SYSTEM_CRC32C=OFF `# Not packaged in Ubuntu` \
@@ -271,18 +273,28 @@ jobs:
             -DUSE_SYSTEM_UTP=OFF `# Not packaged in Ubuntu` \
             -DUSE_SYSTEM_WIDE_INTEGER=OFF `# Not packaged in Ubuntu`
       - name: Make (Core)
-        run: cmake --build obj --config Debug --target transmission 2>&1 | tee makelog
+        run: |
+          set -euo pipefail
+          cmake --build obj --config Debug --target transmission 2>&1 | tee makelog
+      - name: Make (App)
+        run: |
+          set -euo pipefail
+          cmake --build obj --config Debug --target transmission-app 2>&1 | tee -a makelog
       - name: Make (Tests)
-        if: ${{ needs.what-to-make.outputs.make-tests == 'true' }}
-        run: cmake --build obj --config Debug --target libtransmission-test 2>&1 | tee -a makelog
+        if: needs.what-to-make.outputs.make-tests
+        run: |
+          set -euo pipefail
+          cmake --build obj --config Debug --target libtransmission-test 2>&1 | tee -a makelog
       - name: Test for warnings
         run: |
           if grep 'warning:' makelog; then exit 1; fi
 
   clang-tidy-libtransmission-win32:
     runs-on: windows-2025
-    needs: [ what-to-make ]
-    if: ${{ needs.what-to-make.outputs.make-core == 'true' || needs.what-to-make.outputs.make-tests == 'true' }}
+    needs: what-to-make
+    if: |
+      needs.what-to-make.outputs.make-core ||
+      needs.what-to-make.outputs.make-tests
     steps:
       - name: Show Configuration
         run: |
@@ -307,15 +319,19 @@ jobs:
             -G Ninja `
             -DCMAKE_BUILD_TYPE=Debug `
             -DCMAKE_PREFIX_PATH="${Env:DEPS_PREFIX}" `
-            -DENABLE_TESTS=${{ (needs.what-to-make.outputs.make-tests == 'true') && 'ON' || 'OFF' }} `
+            -DENABLE_TESTS=${{ needs.what-to-make.outputs.make-tests && 'ON' || 'OFF' }} `
             -DRUN_CLANG_TIDY=ON `
             -DUSE_SYSTEM_DEFAULT=OFF
       - name: Make (Core)
         run: |
           Import-VisualStudioVars -VisualStudioVersion 2022 -Architecture x64
           cmake --build obj --config Debug --target transmission 2>&1 | tee makelog
+      - name: Make (App)
+        run: |
+          Import-VisualStudioVars -VisualStudioVersion 2022 -Architecture x64
+          cmake --build obj --config Debug --target transmission-app 2>&1 | tee -a makelog
       - name: Make (Tests)
-        if: ${{ needs.what-to-make.outputs.make-tests == 'true' }}
+        if: needs.what-to-make.outputs.make-tests
         run: |
           Import-VisualStudioVars -VisualStudioVersion 2022 -Architecture x64
           cmake --build obj --config Debug --target libtransmission-test 2>&1 | tee -a makelog

gtk/FilterBar.cc

@@ -473,7 +473,7 @@ Glib::RefPtr<Gtk::ListStore> FilterBar::Impl::show_mode_filter_model_new()
 
     static auto constexpr types = std::array<FilterTypeInfo, 9>({ {
         { ShowMode::ShowAll, nullptr, N_("All"), nullptr },
-        { ShowMode{ -1 }, nullptr, nullptr, nullptr },
+        { ShowModeSeparator, nullptr, nullptr, nullptr },
         { ShowMode::ShowActive, nullptr, N_("Active"), "system-run" },
         { ShowMode::ShowDownloading, "Verb", NC_("Verb", "Downloading"), "network-receive" },
         { ShowMode::ShowSeeding, "Verb", NC_("Verb", "Seeding"), "network-transmit" },

libtransmission-app/.clang-tidy

@@ -1,48 +1,47 @@
 ---
-HeaderFilterRegex: .*/libtransmission/.*
+HeaderFilterRegex: .*/libtransmission-app/.*
 
-# TODO: Enable `portability-template-virtual-member-function` after https://github.com/llvm/llvm-project/issues/139031 is fixed
 # PRs welcome to fix & re-enable any of these explicitly-disabled checks
-Checks: >
-  bugprone-*,
-  -bugprone-branch-clone,
-  -bugprone-easily-swappable-parameters,
-  -bugprone-implicit-widening-of-multiplication-result,
-  -bugprone-narrowing-conversions,
-  cert-*,
-  -cert-err58-cpp,
-  -cert-int09-c,
-  clang-analyzer-*,
-  -clang-analyzer-optin.core.EnumCastOutOfRange,
-  cppcoreguidelines-avoid-do-while,
-  cppcoreguidelines-avoid-goto,
-  cppcoreguidelines-avoid-reference-coroutine-parameters,
-  cppcoreguidelines-init-variables,
-  cppcoreguidelines-interfaces-global-init,
-  cppcoreguidelines-no-malloc,
-  cppcoreguidelines-prefer-member-initializer,
-  cppcoreguidelines-pro-type-cstyle-cast,
-  cppcoreguidelines-pro-type-member-init,
-  cppcoreguidelines-slicing,
-  cppcoreguidelines-special-member-functions,
-  cppcoreguidelines-virtual-class-destructor,
-  google-explicit-constructor,
-  misc-*,
-  -misc-include-cleaner,
-  -misc-no-recursion,
-  -misc-non-private-member-variables-in-classes,
-  modernize-*,
-  -modernize-use-trailing-return-type,
-  performance-*,
-  -performance-move-const-arg,
-  portability-*,
-  -portability-template-virtual-member-function,
-  readability-*,
-  -readability-enum-initial-value,
-  -readability-function-cognitive-complexity,
-  -readability-identifier-length,
-  -readability-magic-numbers,
-  -readability-qualified-auto,
+Checks:
+  - bugprone-*
+  - -bugprone-branch-clone
+  - -bugprone-easily-swappable-parameters
+  - -bugprone-implicit-widening-of-multiplication-result
+  - -bugprone-narrowing-conversions
+  - cert-*
+  - -cert-err58-cpp
+  - -cert-int09-c # alias of `readability-enum-initial-value`
+  - clang-analyzer-*
+  - -clang-analyzer-optin.core.EnumCastOutOfRange
+  - cppcoreguidelines-avoid-do-while
+  - cppcoreguidelines-avoid-goto
+  - cppcoreguidelines-avoid-reference-coroutine-parameters
+  - cppcoreguidelines-init-variables
+  - cppcoreguidelines-interfaces-global-init
+  - cppcoreguidelines-no-malloc
+  - cppcoreguidelines-prefer-member-initializer
+  - cppcoreguidelines-pro-type-cstyle-cast
+  - cppcoreguidelines-pro-type-member-init
+  - cppcoreguidelines-slicing
+  - cppcoreguidelines-special-member-functions
+  - cppcoreguidelines-virtual-class-destructor
+  - google-explicit-constructor
+  - misc-*
+  - -misc-include-cleaner
+  - -misc-no-recursion
+  - -misc-non-private-member-variables-in-classes
+  - modernize-*
+  - -modernize-use-trailing-return-type
+  - performance-*
+  - -performance-move-const-arg
+  - portability-*
+  - -portability-template-virtual-member-function # TODO: Enable after https://github.com/llvm/llvm-project/issues/139031 is fixed
+  - readability-*
+  - -readability-enum-initial-value
+  - -readability-function-cognitive-complexity
+  - -readability-identifier-length
+  - -readability-magic-numbers
+  - -readability-qualified-auto
 
 CheckOptions:
   - { key: cppcoreguidelines-avoid-do-while.IgnoreMacros,                    value: true       }

libtransmission-app/converters.cc

@@ -23,6 +23,8 @@
 #include "libtransmission-app/display-modes.h"
 #include "libtransmission-app/converters.h"
 
+using namespace std::literals;
+
 namespace tr::app::detail
 {
 namespace
@@ -88,10 +90,10 @@ struct TrYearMonthDay
         }
 
         auto const dim = days_in_month(y, m);
-        return d >= 1 && d <= static_cast<unsigned>(dim);
+        return d >= 1 && std::cmp_less_equal(d, dim);
     };
 
-    return TrYearMonthDay{ year, month, day, is_valid_ymd(year, month, day) };
+    return TrYearMonthDay{ .year = year, .month = month, .day = day, .valid = is_valid_ymd(year, month, day) };
 }
 
 // c++20 (P0355) replace with std::chrono::sys_days{} after Debian 11 is EOL
@@ -344,11 +346,12 @@ tr_variant from_stats_mode(StatsMode const& src)
     {
         if (auto const* local = std::localtime(&tt))
         {
-            return fmt::format(FMT_STRING("{:%FT%T%z}"), *local);
+            // fmt::runtime to workaround FTBFS in clang
+            return fmt::format(fmt::runtime("{:%FT%T%z}"), *local);
         }
     }
 
-    return fmt::format(FMT_STRING("{:%FT%TZ}"), src);
+    return fmt::format("{:%FT%TZ}", src);
 }
 
 bool to_sys_seconds(tr_variant const& src, std::chrono::sys_seconds* tgt)

libtransmission-app/display-modes.h

@@ -7,7 +7,7 @@
 
 namespace tr::app
 {
-enum class ShowMode
+enum class ShowMode : uint8_t
 {
     ShowAll,
     ShowActive,
@@ -21,7 +21,7 @@ enum class ShowMode
 inline auto constexpr ShowModeCount = 8U;
 inline auto constexpr DefaultShowMode = ShowMode::ShowAll;
 
-enum class SortMode
+enum class SortMode : uint8_t
 {
     SortByActivity,
     SortByAge,
@@ -37,7 +37,7 @@ enum class SortMode
 inline auto constexpr SortModeCount = 10U;
 inline auto constexpr DefaultSortMode = SortMode::SortByName;
 
-enum class StatsMode
+enum class StatsMode : uint8_t
 {
     TotalRatio,
     TotalTransfer,

libtransmission/variant.h

@@ -91,7 +91,7 @@ public:
             {
                 return item.first == key;
             };
-            return std::find_if(std::begin(vec_), std::end(vec_), predicate);
+            return std::ranges::find_if(vec_, predicate);
         }
 
         [[nodiscard]] constexpr auto find(tr_quark const key) const noexcept
@@ -101,7 +101,7 @@ public:
 
         [[nodiscard]] constexpr auto contains(tr_quark const key) const noexcept
         {
-            return find(key) != end();
+            return find(key) != end(); // NOLINT(readability-container-contains)
         }
 
         [[nodiscard]] constexpr auto size() const noexcept