phosphor-post-code-manager: install templated service correctly

The latest yocto update is flagging an error on machines using this
recipe. The reason appears to be because the templated services are
added to the SYSTEMD_SERVICE variable but they are not properly
installed into the filesystem.

Install the templated service file utilizing a more direct and tested
method.

Tested:
- Confirmed service file installed in rootfs as expected
```
/rootfs/usr/lib/systemd/system/multi-user.target.wants/xyz.openbmc_project.State.Boot.PostCode@0.service
```

Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Change-Id: I3bdd15b3960a910ccc4b9bcd0e03df1613687ba1

1 files changed, 19 insertions, 4 deletions

diff --git a/meta-phosphor/recipes-phosphor/state/phosphor-post-code-manager_git.bb b/meta-phosphor/recipes-phosphor/state/phosphor-post-code-manager_git.bb
index b0e11b461e..1ed15982aa 100644
--- a/meta-phosphor/recipes-phosphor/state/phosphor-post-code-manager_git.bb
+++ b/meta-phosphor/recipes-phosphor/state/phosphor-post-code-manager_git.bb
@@ -13,10 +13,6 @@ S = "${WORKDIR}/git"
 
 inherit meson pkgconfig systemd
 
-def get_service(d):
-    return " ".join(["xyz.openbmc_project.State.Boot.PostCode@{}.service".format(x) for x in d.getVar('OBMC_HOST_INSTANCES').split()])
-
-SYSTEMD_SERVICE:${PN} = "${@get_service(d)}"
 DEPENDS += " \
     sdbusplus \
     phosphor-dbus-interfaces \
@@ -25,3 +21,22 @@ DEPENDS += " \
     "
 FILES:${PN}  += "${systemd_system_unitdir}/xyz.openbmc_project.State.Boot.PostCode@.service"
 FILES:${PN}  += "${systemd_system_unitdir}/xyz.openbmc_project.State.Boot.PostCode.service"
+
+pkg_postinst:${PN}:append() {
+    mkdir -p $D$systemd_system_unitdir/multi-user.target.wants
+    for i in ${OBMC_HOST_INSTANCES};
+    do
+        LINK="$D$systemd_system_unitdir/multi-user.target.wants/xyz.openbmc_project.State.Boot.PostCode@${i}.service"
+        TARGET="..//xyz.openbmc_project.State.Boot.PostCode@.service"
+        ln -s $TARGET $LINK
+    done
+}
+
+pkg_prerm:${PN}:append() {
+    for i in ${OBMC_HOST_INSTANCES};
+    do
+        LINK="$D$systemd_system_unitdir/multi-user.target.wants/xyz.openbmc_project.State.Boot.PostCode@${i}.service"
+        rm $LINK
+    done
+}
+