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cmake: Add a SWIFT_XCODE_GENERATE_FOR_IDE_ONLY flag.

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This flag disables the generation of dependency targets that are necessary to accurately rebuild Swift code, but which completely tank the Xcode IDE experience. Since Xcode is primarily useful as a source editor/navigator for the compiler C++ code, and Ninja is a more performant and featureful build system for Swift at this point, provide a mode that generates enough of an Xcode project to edit the Swift compiler source, but which can't build it, as a compromise so we can use Xcode's editor alongside a Ninja build environment.

Swift SVN r24186
This commit is contained in:
Joe Groff
2015-01-05 22:29:43 +00:00
parent 189e558373
commit 5d5986a44f
2 changed files with 40 additions and 14 deletions
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4
CMakeLists.txt
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@@ -123,6 +123,10 @@ option(SWIFT_STDLIB_USE_ASSERT_CONFIG_RELEASE
"Should the stdlib be build with assert config set to release"
FALSE)
option(SWIFT_XCODE_GENERATE_FOR_IDE_ONLY
"Generate an Xcode project suitable for IDE use, but which cannot build"
FALSE)
#
# End of user-configurable options.
#

38
cmake/modules/SwiftAddCustomCommandTarget.cmake
View File

@@ -125,15 +125,16 @@ function(add_custom_command_target dependency_out_var_name)
# Use a hash so that the file name does not push the OS limits for filename
# length.
list(GET ACCT_OUTPUT 0 output_filename)
string(MD5 ACCT_CUSTOM_TARGET_NAME
string(MD5 target_md5
"add_custom_command_target${CMAKE_CURRENT_BINARY_DIR}/${output_filename}")
get_filename_component(output_filename_basename "${output_filename}" NAME)
set(ACCT_CUSTOM_TARGET_NAME
"add_custom_command_target-${ACCT_CUSTOM_TARGET_NAME}-${output_filename_basename}")
set(target_name
"add_custom_command_target-${target_md5}-${output_filename_basename}")
else()
set(target_name "${ACCT_CUSTOM_TARGET_NAME}")
endif()
if((NOT ACCT_IDEMPOTENT) OR
(ACCT_IDEMPOTENT AND NOT TARGET "${ACCT_CUSTOM_TARGET_NAME}"))
if((NOT ACCT_IDEMPOTENT) OR (ACCT_IDEMPOTENT AND NOT TARGET "${target_name}"))
# For each keyword argument k that was passed to this function, set
# ${k}_keyword to ${k}. That will allow us to use the incantation
# '${${k}_keyword} ${ACCT_${k}}' to forward the arguments on.
@@ -146,17 +147,38 @@ function(add_custom_command_target dependency_out_var_name)
IMPLICIT_DEPENDS WORKING_DIRECTORY COMMENT VERBATIM APPEND)
add_custom_command(${ACCT_COMMANDS} ${args})
# Skip generating the target if we are generating an Xcode project only
# for IDE use. The volume of dependencies here causes performance problems
# in Xcode that make it impractical to use.
if(NOT (SWIFT_XCODE_GENERATE_FOR_IDE_ONLY
AND "${ACCT_CUSTOM_TARGET_NAME}" STREQUAL ""))
_make_acct_argument_list(ALL WORKING_DIRECTORY SOURCES)
add_custom_target(
"${ACCT_CUSTOM_TARGET_NAME}" ${args}
"${target_name}" ${args}
DEPENDS ${ACCT_OUTPUT}
COMMENT "${ACCT_OUTPUT}")
set_target_properties(
"${ACCT_CUSTOM_TARGET_NAME}" PROPERTIES
"${target_name}" PROPERTIES
FOLDER "add_custom_command_target artifacts")
endif()
endif()
# "Return" the name of the custom target
set("${dependency_out_var_name}" "${ACCT_CUSTOM_TARGET_NAME}" PARENT_SCOPE)
if(SWIFT_XCODE_GENERATE_FOR_IDE_ONLY
AND "${ACCT_CUSTOM_TARGET_NAME}" STREQUAL "")
set("${dependency_out_var_name}" xcode_generate_for_ide_only_dummy
PARENT_SCOPE)
else()
set("${dependency_out_var_name}" "${target_name}" PARENT_SCOPE)
endif()
endfunction()
# A dummy target for XCODE_GENERATE_FOR_IDE_ONLY targets that stands in for
# the targets we don't generate in that mode.
if(SWIFT_XCODE_GENERATE_FOR_IDE_ONLY)
add_custom_command(OUTPUT xcode_generate_for_ide_only_dummy.txt
COMMAND echo "This Xcode project is configured for IDE use only and cannot build Swift."
COMMAND false)
add_custom_target(xcode_generate_for_ide_only_dummy ALL
DEPENDS xcode_generate_for_ide_only_dummy.txt)
endif()