cmake: --build and --install error out when encountering bad flags

Fixes #22186

Source/cmakemain.cxx

@@ -532,11 +532,22 @@ int do_build(int ac, char const* const* av)
     for (; i < inputArgs.size() && !nativeOptionsPassed; ++i) {
 
       std::string const& arg = inputArgs[i];
+      bool matched = false;
+      bool parsed = false;
       for (auto const& m : arguments) {
-        if (m.matches(arg) && m.parse(arg, i, inputArgs)) {
+        matched = m.matches(arg);
+        if (matched) {
+          parsed = m.parse(arg, i, inputArgs);
           break;
         }
       }
+      if (!(matched && parsed)) {
+        dir.clear();
+        if (!matched) {
+          std::cerr << "Unknown argument " << arg << std::endl;
+        }
+        break;
+      }
     }
 
     if (nativeOptionsPassed) {
@@ -806,11 +817,22 @@ int do_install(int ac, char const* const* av)
     for (decltype(inputArgs.size()) i = 0; i < inputArgs.size(); ++i) {
 
       std::string const& arg = inputArgs[i];
+      bool matched = false;
+      bool parsed = false;
       for (auto const& m : arguments) {
-        if (m.matches(arg) && m.parse(arg, i, inputArgs)) {
+        matched = m.matches(arg);
+        if (matched) {
+          parsed = m.parse(arg, i, inputArgs);
           break;
         }
       }
+      if (!(matched && parsed)) {
+        dir.clear();
+        if (!matched) {
+          std::cerr << "Unknown argument " << arg << std::endl;
+        }
+        break;
+      }
     }
   }
 

Tests/RunCMake/CommandLine/RunCMakeTest.cmake

@@ -54,6 +54,14 @@ run_cmake_command(build-no-dir
   ${CMAKE_COMMAND} --build)
 run_cmake_command(build-no-cache
   ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR})
+run_cmake_command(build-unknown-command-short
+  ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR} -invalid-command)
+run_cmake_command(build-unknown-command-long
+  ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR} --invalid-command)
+run_cmake_command(build-unknown-command-partial-match
+  ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR} --targetinvalid)
+run_cmake_command(build-invalid-target-syntax
+  ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR} --target=invalid)
 run_cmake_command(build-no-generator
   ${CMAKE_COMMAND} --build ${RunCMake_SOURCE_DIR}/cache-no-generator)
 run_cmake_command(build-bad-dir
@@ -65,6 +73,10 @@ run_cmake_command(install-no-dir
   ${CMAKE_COMMAND} --install)
 run_cmake_command(install-bad-dir
   ${CMAKE_COMMAND} --install dir-does-not-exist)
+run_cmake_command(install-unknown-command-short
+  ${CMAKE_COMMAND} --install ${RunCMake_SOURCE_DIR} -invalid-command)
+run_cmake_command(install-unknown-command-long
+  ${CMAKE_COMMAND} --install ${RunCMake_SOURCE_DIR} --invalid-command)
 run_cmake_command(install-options-to-vars
   ${CMAKE_COMMAND} --install ${RunCMake_SOURCE_DIR}/dir-install-options-to-vars
   --strip --prefix /var/test --config sample --component pack)

Tests/RunCMake/CommandLine/build-invalid-target-syntax-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/build-invalid-target-syntax-stderr.txt

@@ -0,0 +1,2 @@
+^CMake Error: Invalid syntax used with --target
+Usage: cmake --build \[<dir> \| --preset <preset>\] \[options\] \[-- \[native-options\]\]

Tests/RunCMake/CommandLine/build-unknown-command-long-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/build-unknown-command-long-stderr.txt

@@ -0,0 +1,2 @@
+^Unknown argument --invalid-command
+Usage: cmake --build \[<dir> \| --preset <preset>\] \[options\] \[-- \[native-options\]\]

Tests/RunCMake/CommandLine/build-unknown-command-partial-match-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/build-unknown-command-partial-match-stderr.txt

@@ -0,0 +1,2 @@
+^CMake Error: Invalid syntax used with --target
+Usage: cmake --build \[<dir> \| --preset <preset>\] \[options\] \[-- \[native-options\]\]

Tests/RunCMake/CommandLine/build-unknown-command-short-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/build-unknown-command-short-stderr.txt

@@ -0,0 +1,2 @@
+^Unknown argument -invalid-command
+Usage: cmake --build \[<dir> \| --preset <preset>\] \[options\] \[-- \[native-options\]\]

Tests/RunCMake/CommandLine/install-unknown-command-long-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/install-unknown-command-long-stderr.txt

@@ -0,0 +1,2 @@
+^Unknown argument --invalid-command
+Usage: cmake --install <dir> \[options\]

Tests/RunCMake/CommandLine/install-unknown-command-short-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CommandLine/install-unknown-command-short-stderr.txt

@@ -0,0 +1,2 @@
+^Unknown argument -invalid-command
+Usage: cmake --install <dir> \[options\]