Case mismatch for 'Schema' directories

[keba-estr]

Description

Nodeset generation might fail on case dependent Linux systems, as the directory referenced in the file open62541Macros.cmake is '${UA_NODESET_DIR}/Schema', but in the debian tools package the folder name is 'schema' with lower case letters.

Checklist

Please provide the following information:

• open62541 Version (release number or git tag): 1.4.1
• Operating system: Linux

[keba-estr]

@jpfr: What is the correct solution here?
It seems that UA_NODESET_DIR is both used with 'open62541/deps/ua-nodeset' for the open62541 internal nodeset generation and with '@PACKAGE_open62541_install_nodeset_dir@' for a user nodeset generation.
Should the case of the 'schema' directory in the debian package be the same as in the dependent nodesetLoader component?

[jpfr]

The open62541Config.cmake contains this line:

set_and_check(UA_NODESET_DIR ${PACKAGE_PREFIX_DIR}/share/open62541/schema CACHE PATH "Path to the directory that contains the schema files")

In our internal CMakeLists.txt we have both nodeset-dir and schema-dir:

set(UA_SCHEMA_DIR ${PROJECT_SOURCE_DIR}/tools/schema) # Directory with the schema files for installation

My proposal is to unify that and remove UA_SCHEMA_DIR.
So that the UA_NODESET_DIR points to wherever the schemas are.
Including either /schema or /Schema.

[keba-estr]

Yes, that looks fine, but: UA_NODESET_DIR is used without the Schema folder in open62541\doc\nodeset_compiler.rst, open62541\tests\nodeset-compiler\CMakeLists.txt, tools\nodeset_injector\CMakeLists.txt, ....

[keba-estr]

@jpfr: Added a possible solution with PR #6519, but I am not sure if I got everything correct.