Componentize lldb/scripts to use with LLVM_DISTRIBUTION_COMPONENTS

[aadsm]

Summary

I'd like to install lldb using the install-distribution target with LLVM_DISTRIBUTION_COMPONENTS but this is currently not possible as the lldb/scripts do not provide any component we can use and install the python scripts.
For this effect I created an lldb-scripts target and added the install-lldb-scripts llvm install target.

I tested with:
cmake ... -DLLVM_ENABLE_PROJECTS="clang;lldb" -DLLVM_DISTRIBUTION_COMPONENTS="lldb;liblldb;lldb-scripts" ...
DESTDIR=... ninja install-distribution

Then checked with bin/lldb -x -o 'script import lldb'

Question:
Since the lldb component is basically useless without at least liblldb would it make sense to make it depending on liblldb and this new lldb-scripts components?

[mgorny]

lldb/scripts/CMakeLists.txt

72 ↗

(On Diff #222956)

Maybe add python somewhere in the name. Technically, the whole thing looks like it was designed to support more swig targets.

[aadsm]

Rename lldb-scripts to lldb-python-scripts

lldb/trunk/scripts/CMakeLists.txt

execute_process(
     OUTPUT_STRIP_TRAILING_WHITESPACE)
   execute_process(
     COMMAND ${PYTHON_EXECUTABLE}
         -c "import distutils.sysconfig; print(distutils.sysconfig.get_python_lib(True, False, ''))"
     OUTPUT_VARIABLE SWIG_INSTALL_DIR
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 
   # Install the LLDB python module
-  install(DIRECTORY ${SWIG_PYTHON_DIR}/ DESTINATION ${SWIG_INSTALL_DIR})
+  add_custom_target(lldb-python-scripts)
+  add_dependencies(lldb-python-scripts finish_swig)
+  install(DIRECTORY ${SWIG_PYTHON_DIR}/
+    DESTINATION ${SWIG_INSTALL_DIR}
+    COMPONENT lldb-scripts)
+  if (NOT LLVM_ENABLE_IDE)
+    add_llvm_install_targets(install-lldb-python-scripts
+                             COMPONENT lldb-python-scripts
+                             DEPENDS lldb-python-scripts)
+  endif()
 endif()