[PATCH 2/2] If PLYMOUTH_THEME_NAME is set, write it into plymouthd.conf

[Will Woods]

You can set PLYMOUTH_THEME_NAME when building initramfs to get a
different theme into initramfs, but this doesn't change the default
theme, so the resulting initramfs won't actually use the theme we
installed.

This patch makes plymouth-populate-initrd rewrite the 'Theme=XXX' line
in plymouthd.conf, so plymouth will use the theme we install.
---
 scripts/plymouth-populate-initrd.in | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/scripts/plymouth-populate-initrd.in b/scripts/plymouth-populate-initrd.in
index 8d1eec0..d901a9b 100755
--- a/scripts/plymouth-populate-initrd.in
+++ b/scripts/plymouth-populate-initrd.in
@@ -8,6 +8,7 @@
 [ -z "$PLYMOUTH_DATADIR" ] && PLYMOUTH_DATADIR="@PLYMOUTH_DATADIR@"
 [ -z "$PLYMOUTH_PLUGIN_PATH" ] && PLYMOUTH_PLUGIN_PATH="$(plymouth --get-splash-plugin-path)"
 [ -z "$PLYMOUTH_LOGO_FILE" ] && PLYMOUTH_LOGO_FILE="@PLYMOUTH_LOGO_FILE@"
+[ -n "$PLYMOUTH_THEME_NAME" ] && THEME_OVERRIDE=1
 [ -z "$PLYMOUTH_THEME_NAME" ] && PLYMOUTH_THEME_NAME=$(plymouth-set-default-theme)
 [ -z "$PLYMOUTH_CONFDIR" ] && PLYMOUTH_CONFDIR="@PLYMOUTH_CONF_DIR@"
 [ -z "$PLYMOUTH_POLICYDIR" ] && PLYMOUTH_POLICYDIR="@PLYMOUTH_POLICY_DIR@"
@@ -388,6 +389,12 @@ if [ -z "$PLYMOUTH_THEME_NAME" ]; then
     exit 1
 fi
 
+if [ $THEME_OVERRIDE ]; then
+    conf=$INITRDDIR/${PLYMOUTH_CONFDIR}/plymouthd.conf
+    echo "modifying plymouthd.conf: Theme=$PLYMOUTH_THEME_NAME" > /dev/stderr
+    sed -i "s/^ *Theme *=.*/# theme modified by plymouth-populate-initrd\nTheme=$PLYMOUTH_THEME_NAME/" $conf
+fi
+
 PLYMOUTH_MODULE_NAME=$(grep "ModuleName *= *" ${PLYMOUTH_DATADIR}/plymouth/themes/${PLYMOUTH_THEME_NAME}/${PLYMOUTH_THEME_NAME}.plymouth | sed 's/ModuleName *= *//')
 
 if [ ! -f ${PLYMOUTH_PLUGIN_PATH}/${PLYMOUTH_MODULE_NAME}.so ]; then
-- 
1.8.0