diff options
14 files changed, 87 insertions, 0 deletions
diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst index d3514ab..0e73bd2 100644 --- a/Help/manual/cmake-generator-expressions.7.rst +++ b/Help/manual/cmake-generator-expressions.7.rst @@ -274,6 +274,9 @@ Available output expressions are: Marks ``...`` as being the name of a target. This is required if exporting targets to multiple dependent export sets. The ``...`` must be a literal name of a target- it may not contain generator expressions. +``$<TARGET_NAME_IF_EXISTS:...>`` + Expands to the ``...`` if the given target exists, an empty string + otherwise. ``$<LINK_ONLY:...>`` Content of ``...`` except when evaluated in a link interface while propagating :ref:`Target Usage Requirements`, in which case it is the diff --git a/Help/release/dev/genex-TARGET_NAME_IF_EXISTS.rst b/Help/release/dev/genex-TARGET_NAME_IF_EXISTS.rst new file mode 100644 index 0000000..416e812 --- /dev/null +++ b/Help/release/dev/genex-TARGET_NAME_IF_EXISTS.rst @@ -0,0 +1,6 @@ +genex-TARGET_NAME_IF_EXISTS +--------------------------- + +* A new ``$<TARGET_NAME_IF_EXISTS:...>`` + :manual:`generator expression <cmake-generator-expressions(7)>` + has been added. diff --git a/Source/cmGeneratorExpressionNode.cxx b/Source/cmGeneratorExpressionNode.cxx index f444113..09b7faf 100644 --- a/Source/cmGeneratorExpressionNode.cxx +++ b/Source/cmGeneratorExpressionNode.cxx @@ -331,6 +331,40 @@ static const struct TargetExistsNode : public cmGeneratorExpressionNode } } targetExistsNode; +static const struct TargetNameIfExistsNode : public cmGeneratorExpressionNode +{ + TargetNameIfExistsNode() {} + + int NumExpectedParameters() const override { return 1; } + + std::string Evaluate( + const std::vector<std::string>& parameters, + cmGeneratorExpressionContext* context, + const GeneratorExpressionContent* content, + cmGeneratorExpressionDAGChecker* /*dagChecker*/) const override + { + if (parameters.size() != 1) { + reportError(context, content->GetOriginalExpression(), + "$<TARGET_NAME_IF_EXISTS:...> expression requires one " + "parameter"); + return std::string(); + } + + std::string targetName = parameters.front(); + if (targetName.empty() || + !cmGeneratorExpression::IsValidTargetName(targetName)) { + reportError(context, content->GetOriginalExpression(), + "$<TARGET_NAME_IF_EXISTS:tgt> expression requires a " + "non-empty valid target name."); + return std::string(); + } + + return context->LG->GetMakefile()->FindTargetToUse(targetName) + ? targetName + : std::string(); + } +} targetNameIfExistsNode; + static const struct LowerCaseNode : public cmGeneratorExpressionNode { LowerCaseNode() {} @@ -1897,6 +1931,7 @@ const cmGeneratorExpressionNode* cmGeneratorExpressionNode::GetNode( nodeMap["TARGET_OBJECTS"] = &targetObjectsNode; nodeMap["TARGET_POLICY"] = &targetPolicyNode; nodeMap["TARGET_EXISTS"] = &targetExistsNode; + nodeMap["TARGET_NAME_IF_EXISTS"] = &targetNameIfExistsNode; nodeMap["BUILD_INTERFACE"] = &buildInterfaceNode; nodeMap["INSTALL_INTERFACE"] = &installInterfaceNode; nodeMap["INSTALL_PREFIX"] = &installPrefixNode; diff --git a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake index f9a5cae..5636d00 100644 --- a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake +++ b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake @@ -38,6 +38,10 @@ run_cmake(TARGET_EXISTS-no-arg) run_cmake(TARGET_EXISTS-empty-arg) run_cmake(TARGET_EXISTS) run_cmake(TARGET_EXISTS-not-a-target) +run_cmake(TARGET_NAME_IF_EXISTS-no-arg) +run_cmake(TARGET_NAME_IF_EXISTS-empty-arg) +run_cmake(TARGET_NAME_IF_EXISTS) +run_cmake(TARGET_NAME_IF_EXISTS-not-a-target) run_cmake(ImportedTarget-TARGET_BUNDLE_DIR) run_cmake(ImportedTarget-TARGET_BUNDLE_CONTENT_DIR) diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-check.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-check.cmake new file mode 100644 index 0000000..2f57430 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-check.cmake @@ -0,0 +1,6 @@ +file(READ "${RunCMake_TEST_BINARY_DIR}/TARGET_NAME_IF_EXISTS-generated.txt" content) + +set(expected "foo") +if(NOT content STREQUAL expected) + set(RunCMake_TEST_FAILED "actual content:\n [[${content}]]\nbut expected:\n [[${expected}]]") +endif() diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-result.txt b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-result.txt new file mode 100644 index 0000000..d00491f --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-result.txt @@ -0,0 +1 @@ +1 diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-stderr.txt b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-stderr.txt new file mode 100644 index 0000000..5ee13b7 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg-stderr.txt @@ -0,0 +1,9 @@ +CMake Error at TARGET_NAME_IF_EXISTS-empty-arg.cmake:2 \(file\): + Error evaluating generator expression: + + \$<TARGET_NAME_IF_EXISTS:> + + \$<TARGET_NAME_IF_EXISTS:tgt> expression requires a non-empty valid target + name. +Call Stack \(most recent call first\): + CMakeLists.txt:[0-9]+ \(include\) diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg.cmake new file mode 100644 index 0000000..f5034f4 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-empty-arg.cmake @@ -0,0 +1,2 @@ +cmake_policy(SET CMP0070 NEW) +file(GENERATE OUTPUT TARGET_NAME_IF_EXISTS-generated.txt CONTENT "$<TARGET_NAME_IF_EXISTS:${empty}>") diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-result.txt b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-result.txt new file mode 100644 index 0000000..d00491f --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-result.txt @@ -0,0 +1 @@ +1 diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-stderr.txt b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-stderr.txt new file mode 100644 index 0000000..4122425 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg-stderr.txt @@ -0,0 +1,8 @@ +CMake Error at TARGET_NAME_IF_EXISTS-no-arg.cmake:2 \(file\): + Error evaluating generator expression: + + \$<TARGET_NAME_IF_EXISTS> + + \$<TARGET_NAME_IF_EXISTS> expression requires exactly one parameter. +Call Stack \(most recent call first\): + CMakeLists.txt:[0-9]+ \(include\) diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg.cmake new file mode 100644 index 0000000..3293094 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-no-arg.cmake @@ -0,0 +1,2 @@ +cmake_policy(SET CMP0070 NEW) +file(GENERATE OUTPUT TARGET_NAME_IF_EXISTS-generated.txt CONTENT "$<TARGET_NAME_IF_EXISTS>") diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target-check.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target-check.cmake new file mode 100644 index 0000000..2085c16 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target-check.cmake @@ -0,0 +1,5 @@ +file(READ "${RunCMake_TEST_BINARY_DIR}/TARGET_NAME_IF_EXISTS-not-a-target-generated.txt" content) + +if(content) + set(RunCMake_TEST_FAILED "actual content:\n [[${content}]]\nbut expected an empty string") +endif() diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target.cmake new file mode 100644 index 0000000..a054e6c --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS-not-a-target.cmake @@ -0,0 +1,2 @@ +cmake_policy(SET CMP0070 NEW) +file(GENERATE OUTPUT TARGET_NAME_IF_EXISTS-not-a-target-generated.txt CONTENT "$<TARGET_NAME_IF_EXISTS:just-random-string>") diff --git a/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS.cmake b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS.cmake new file mode 100644 index 0000000..0ce3b1d --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/TARGET_NAME_IF_EXISTS.cmake @@ -0,0 +1,3 @@ +cmake_policy(SET CMP0070 NEW) +add_custom_target(foo) +file(GENERATE OUTPUT TARGET_NAME_IF_EXISTS-generated.txt CONTENT "$<TARGET_NAME_IF_EXISTS:foo>") |