Remove __pycache__ before uninstall

`__pycache__` might be created when a python script is ran. Which
prevents `rpm -e` and `dpkg --remove` from completely removing the
application. This patch removes `__pycache__` early in the uninstall
process.

A similar issue is resolved in:
rocm_smi_lib Change-Id: I695bd085d4a43b678b563b4c35f6d2e8ddfa7d7c

Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>
Change-Id: I9fe0cd61570c2bd83cf9a45c95837ee6ad11e84b


[ROCm/rdc commit: 69a5a1d6bc]

projects/rdc/CMakeLists.txt

@@ -333,9 +333,15 @@ set(INST_SCR_PERM OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE
 configure_file(
   "${PROJECT_SOURCE_DIR}/src/DEBIAN_postinst.in"
   "${PROJECT_SOURCE_DIR}/DEBIAN/postinst" FILE_PERMISSIONS ${INST_SCR_PERM})
+configure_file(
+  "${PROJECT_SOURCE_DIR}/src/DEBIAN_prerm.in"
+  "${PROJECT_SOURCE_DIR}/DEBIAN/prerm" FILE_PERMISSIONS ${INST_SCR_PERM})
 configure_file(
   "${PROJECT_SOURCE_DIR}/src/RPM_rpm_post.in"
   "${PROJECT_SOURCE_DIR}/RPM/rpm_post" FILE_PERMISSIONS ${INST_SCR_PERM})
+configure_file(
+  "${PROJECT_SOURCE_DIR}/src/RPM_preun.in"
+  "${PROJECT_SOURCE_DIR}/RPM/rpm_preun" FILE_PERMISSIONS ${INST_SCR_PERM})
 configure_file(
   "${PROJECT_SOURCE_DIR}/src/RPM_postun.in"
   "${PROJECT_SOURCE_DIR}/RPM/rpm_postun" FILE_PERMISSIONS ${INST_SCR_PERM})
@@ -395,6 +401,8 @@ list(APPEND CPACK_RPM_EXCLUDE_FROM_AUTO_FILELIST_ADDITION "/opt")
 
 set(CPACK_RPM_PRE_INSTALL_SCRIPT_FILE
                    "${CMAKE_CURRENT_SOURCE_DIR}/RPM/rpm_post")
+set(CPACK_RPM_PRE_UNINSTALL_SCRIPT_FILE
+                 "${CMAKE_CURRENT_SOURCE_DIR}/RPM/rpm_preun")
 set(CPACK_RPM_POST_UNINSTALL_SCRIPT_FILE
                  "${CMAKE_CURRENT_SOURCE_DIR}/RPM/rpm_postun")
 set(CPACK_RPM_PACKAGE_VERSION ${PKG_VERSION_STR})

projects/rdc/src/DEBIAN_prerm.in

@@ -1,4 +1,7 @@
 #!/bin/bash
+
+set -e
+
 stop_rdc() {
     #stop RDC if running
     systemctl stop rdc
@@ -9,13 +12,18 @@ reload_systemd() {
     systemctl daemon-reload
     return 0
 }
-set -e
+
+rm_pyc() {
+    # remove pyc file generated by python
+    rm -rf /@RDC_CLIENT_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/@RDC@/python_binding/__pycache__
+}
 
 case "$1" in
    remove | upgrade )
        stop_rdc
        unlink /lib/systemd/system/rdc.service
        reload_systemd
+       rm_pyc
    ;;
    purge)
    ;;
@@ -23,4 +31,3 @@ case "$1" in
        exit 0
    ;;
 esac
-

projects/rdc/src/RPM_preun.in

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+if [ $1 -le 1 ]; then
+    # perform the below actions for rpm remove($1=0) or upgrade($1=1) operations
+    # remove pyc file generated by python
+    rm -rf /@RDC_CLIENT_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBEXECDIR@/@RDC@/python_binding/__pycache__
+fi