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Reland "[lldb][headers] Create script to fix up versioning" (llvm#142864)" (llvm#142871)
This relands the original commit for the versioning script in LLDB. This commit uses '>' for output from `unifdef` for platforms that have that executable but do not have the `-o` option. It also fixes the Xcode build by adding a dependency between the liblldb-header-staging target in the source/API/CMakeLists.txt the `liblldb-resource-headers` target in LLDBFramework.cmake. Original patch: llvm#141116 (cherry picked from commit eb76d83)
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‎lldb/cmake/modules/LLDBFramework.cmake

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@@ -107,6 +107,9 @@ endforeach()
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# Wrap output in a target, so lldb-framework can depend on it.
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add_custom_target(liblldb-resource-headers DEPENDS lldb-sbapi-dwarf-enums ${lldb_staged_headers})
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set_target_properties(liblldb-resource-headers PROPERTIES FOLDER "LLDB/Resources")
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# We're taking the header files from where they've been staged in the build directory's include folder,
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# so create a dependency on the build step that creates that directory.
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add_dependencies(liblldb-resource-headers liblldb-header-staging)
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add_dependencies(liblldb liblldb-resource-headers)
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# At build time, copy the staged headers into the framework bundle (and do

‎lldb/scripts/framework-header-fix.sh

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@@ -7,11 +7,5 @@ for file in `find $1 -name "*.h"`
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do
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/usr/bin/sed -i.bak 's/\(#include\)[ ]*"lldb\/\(API\/\)\{0,1\}\(.*\)"/\1 <LLDB\/\3>/1' "$file"
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/usr/bin/sed -i.bak 's|<LLDB/Utility|<LLDB|' "$file"
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LLDB_VERSION=`echo $2 | /usr/bin/sed -E 's/^([0-9]+).([0-9]+).([0-9]+)(.[0-9]+)?$/\\1/g'`
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LLDB_REVISION=`echo $2 | /usr/bin/sed -E 's/^([0-9]+).([0-9]+).([0-9]+)(.[0-9]+)?$/\\3/g'`
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LLDB_VERSION_STRING=`echo $2`
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/usr/bin/sed -i.bak "s|//#define LLDB_VERSION$|#define LLDB_VERSION $LLDB_VERSION |" "$file"
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/usr/bin/sed -i.bak "s|//#define LLDB_REVISION|#define LLDB_REVISION $LLDB_REVISION |" "$file"
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/usr/bin/sed -i.bak "s|//#define LLDB_VERSION_STRING|#define LLDB_VERSION_STRING \"$LLDB_VERSION_STRING\" |" "$file"
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rm -f "$file.bak"
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done

‎lldb/scripts/version-header-fix.py

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#!/usr/bin/env python3
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"""
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Usage: <path/to/input-header.h> <path/to/output-header.h> LLDB_MAJOR_VERSION LLDB_MINOR_VERSION LLDB_PATCH_VERSION
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This script uncomments and populates the versioning information in lldb-defines.h
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"""
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import argparse
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import os
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import re
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LLDB_VERSION_REGEX = re.compile(r"//\s*#define LLDB_VERSION\s*$", re.M)
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LLDB_REVISION_REGEX = re.compile(r"//\s*#define LLDB_REVISION\s*$", re.M)
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LLDB_VERSION_STRING_REGEX = re.compile(r"//\s*#define LLDB_VERSION_STRING\s*$", re.M)
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("input_path")
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parser.add_argument("output_path")
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parser.add_argument("lldb_version_major")
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parser.add_argument("lldb_version_minor")
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parser.add_argument("lldb_version_patch")
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args = parser.parse_args()
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input_path = str(args.input_path)
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output_path = str(args.output_path)
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lldb_version_major = args.lldb_version_major
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lldb_version_minor = args.lldb_version_minor
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lldb_version_patch = args.lldb_version_patch
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with open(input_path, "r") as input_file:
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lines = input_file.readlines()
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file_buffer = "".join(lines)
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with open(output_path, "w") as output_file:
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# For the defines in lldb-defines.h that define the major, minor and version string
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# uncomment each define and populate its value using the arguments passed in.
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# e.g. //#define LLDB_VERSION -> #define LLDB_VERSION <LLDB_MAJOR_VERSION>
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file_buffer = re.sub(
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LLDB_VERSION_REGEX,
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r"#define LLDB_VERSION " + lldb_version_major,
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file_buffer,
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)
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file_buffer = re.sub(
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LLDB_REVISION_REGEX,
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r"#define LLDB_REVISION " + lldb_version_patch,
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file_buffer,
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)
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file_buffer = re.sub(
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LLDB_VERSION_STRING_REGEX,
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r'#define LLDB_VERSION_STRING "{0}.{1}.{2}"'.format(
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lldb_version_major, lldb_version_minor, lldb_version_patch
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),
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file_buffer,
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)
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output_file.write(file_buffer)
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if __name__ == "__main__":
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main()

‎lldb/source/API/CMakeLists.txt

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@@ -322,6 +322,45 @@ else()
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endif()
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endif()
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# Stage all headers in the include directory in the build dir.
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file(GLOB public_headers ${LLDB_SOURCE_DIR}/include/lldb/API/*.h)
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set(lldb_header_staging_dir ${CMAKE_BINARY_DIR}/include/lldb)
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file(GLOB root_public_headers ${LLDB_SOURCE_DIR}/include/lldb/lldb-*.h)
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file(GLOB root_private_headers ${LLDB_SOURCE_DIR}/include/lldb/lldb-private*.h)
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list(REMOVE_ITEM root_public_headers ${root_private_headers})
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find_program(unifdef_EXECUTABLE unifdef)
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foreach(header
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${public_headers}
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${generated_public_headers}
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${root_public_headers})
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get_filename_component(basename ${header} NAME)
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set(staged_header ${lldb_header_staging_dir}/${basename})
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if(unifdef_EXECUTABLE)
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# unifdef returns 0 when the file is unchanged and 1 if something was changed.
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# That means if we successfully remove SWIG code, the build system believes
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# that the command has failed and stops. This is undesirable.
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set(copy_command ${unifdef_EXECUTABLE} -USWIG ${header} > ${staged_header} || (exit 0))
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else()
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set(copy_command ${CMAKE_COMMAND} -E copy ${header} ${staged_header})
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endif()
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add_custom_command(
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DEPENDS ${header} OUTPUT ${staged_header}
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COMMAND ${copy_command}
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COMMENT "LLDB headers: stage LLDB headers in include directory")
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list(APPEND lldb_staged_headers ${staged_header})
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endforeach()
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add_custom_command(TARGET liblldb POST_BUILD
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COMMAND ${LLDB_SOURCE_DIR}/scripts/version-header-fix.py ${LLDB_SOURCE_DIR}/include/lldb/lldb-defines.h ${lldb_header_staging_dir}/lldb-defines.h ${LLDB_VERSION_MAJOR} ${LLDB_VERSION_MINOR} ${LLDB_VERSION_PATCH}
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)
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add_custom_target(liblldb-header-staging DEPENDS ${lldb_staged_headers})
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add_dependencies(liblldb liblldb-header-staging)
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if(LLDB_BUILD_FRAMEWORK)
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include(LLDBFramework)
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‎lldb/test/Shell/Scripts/Inputs/lldb-defines.h

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// This is a truncated version of lldb-defines.h used to test the script
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// that fixes up its versioning info.
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// The script needs to uncomment these lines and populate the info for versioning.
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// #define LLDB_VERSION
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// #define LLDB_REVISION
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// #define LLDB_VERSION_STRING

‎lldb/test/Shell/Scripts/TestVersionFixScript.test

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# Create a temp dir for output and run the version fix script on the truncated version of lldb-defines.h in the inputs dir.
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RUN: mkdir -p %t/Outputs
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RUN: %python %p/../../../scripts/version-header-fix.py %p/Inputs/lldb-defines.h %t/Outputs/lldb-defines.h 21 0 12
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# Check the output
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RUN: cat %t/Outputs/lldb-defines.h | FileCheck %s
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# The LLDB version defines must be uncommented and filled in with the values passed into the script.
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CHECK: {{^}}#define LLDB_VERSION 21
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CHECK: {{^}}#define LLDB_REVISION 12
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CHECK: {{^}}#define LLDB_VERSION_STRING "21.0.12"

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