samhain: rework due to changed cache handling

OE-Core changed the cache handling which made the use of ${BPN} no fail.

| Parsing recipes...WARNING: .../samhain-standalone.bb: Exception during build_dependencies for do_configure
| WARNING: .../samhain-standalone.bb: Error during finalise of .../samhain-standalone.bb
| ERROR: ExpansionError during parsing .../samhain-standalone.bb
| Traceback (most recent call last):
|   File "Var <MODE_NAME>", line 1, in <module>
| bb.data_smart.ExpansionError: Failure expanding variable MODE_NAME, expression was ${@d.getVar('BPN').split('-')[1]} which triggered exception IndexError: list index out of range
| The variable dependency chain for the failure is: MODE_NAME -> SAMHAIN_MODE -> do_configure

Simplify the setting of MODE_NAME and SAMHAIN_MODE by setting them
in the recipe files where we know their values.

bitbake:
ee89ade5 cache/codeparser: Switch to a new BB_CACHEDIR variable for cache location
oe-core:
7c15e03dd3 bitbake.conf: Add BB_HASH_CODEPARSER_VALS

Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

recipes-ids/samhain/samhain-client.bb

@@ -8,5 +8,8 @@ EXTRA_OECONF += " \
         --with-port=${SAMHAIN_PORT} \
         "
 
+MODE_NAME = "client"
+SAMHAIN_MODE = "client"
+
 RDEPENDS:${PN} = "acl zlib attr bash"
 RCONFLICTS:${PN} = "samhain-standalone"

recipes-ids/samhain/samhain-server.bb

@@ -8,6 +8,9 @@ SRC_URI += "file://samhain-server-volatiles \
             file://samhain-server-volatiles.conf \
            "
 
+MODE_NAME = "server"
+SAMHAIN_MODE = "server"
+
 TARGET_CC_ARCH += "${LDFLAGS}"
 
 do_install:append() {

recipes-ids/samhain/samhain-standalone.bb

@@ -7,6 +7,9 @@ SRC_URI += "file://samhain-not-run-ptest-on-host.patch \
 
 PROVIDES += "samhain"
 
+MODE_NAME = "standalone"
+SAMHAIN_MODE = "no"
+
 SYSTEMD_SERVICE:${PN} = "samhain.service"
 
 inherit ptest

recipes-ids/samhain/samhain.inc

@@ -40,14 +40,6 @@ SYSTEMD_PACKAGES = "${PN}"
 SYSTEMD_SERVICE:${PN} = "${INITSCRIPT_NAME}.service"
 SYSTEMD_AUTO_ENABLE = "disable"
 
-# mode mapping:
-# BPN                MODE_NAME   SAMHAIN_MODE
-# samhain-standalone standalone  no
-# samhain-client     client      client
-# samhain-server     server      server
-MODE_NAME = "${@d.getVar('BPN').split('-')[1]}"
-SAMHAIN_MODE = "${@oe.utils.ifelse(d.getVar('MODE_NAME') == 'standalone', 'no', '${MODE_NAME}')}"
-
 # supports mysql|postgresql|oracle|odbc but postgresql is the only one available
 
 PACKAGECONFIG ??= "postgresql ps \