Source lineage specific envsetup

Change-Id: I39d3e711a6beab47e3284919a9a4fef15b0f40b9
diff --git a/envsetup.sh b/envsetup.sh
index f802573..042a058 100644
--- a/envsetup.sh
+++ b/envsetup.sh
@@ -44,6 +44,12 @@
 - refreshmod: Refresh list of modules for allmod/gomod/pathmod/outmod/installmod.
 - syswrite:   Remount partitions (e.g. system.img) as writable, rebooting if necessary.
 
+EOF
+
+    __print_lineage_functions_help
+
+cat <<EOF
+
 Environment options:
 - SANITIZE_HOST: Set to 'address' to use ASAN for all host modules.
 - ANDROID_QUIET_BUILD: set to 'true' to display only the essential messages.
@@ -53,7 +59,7 @@
     local T=$(gettop)
     local A=""
     local i
-    for i in `cat $T/build/envsetup.sh | sed -n "/^[[:blank:]]*function /s/function \([a-z_]*\).*/\1/p" | sort | uniq`; do
+    for i in `cat $T/build/envsetup.sh $T/vendor/lineage/build/envsetup.sh | sed -n "/^[[:blank:]]*function /s/function \([a-z_]*\).*/\1/p" | sort | uniq`; do
       A="$A $i"
     done
     echo $A
@@ -64,8 +70,8 @@
 {
     local T=$(gettop)
     # Grep out the variable names from the script.
-    cached_vars=(`cat $T/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`)
-    cached_abs_vars=(`cat $T/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_abs_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`)
+    cached_vars=(`cat $T/build/envsetup.sh $T/vendor/lineage/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`)
+    cached_abs_vars=(`cat $T/build/envsetup.sh $T/vendor/lineage/build/envsetup.sh | tr '()' '  ' | awk '{for(i=1;i<=NF;i++) if($i~/get_abs_build_var/) print $(i+1)}' | sort -u | tr '\n' ' '`)
     # Call the build system to dump the "<val>=<value>" pairs as a shell script.
     build_dicts_script=`\builtin cd $T; build/soong/soong_ui.bash --dumpvars-mode \
                         --vars="${cached_vars[*]}" \
@@ -1964,3 +1970,5 @@
 addcompletions
 
 export ANDROID_BUILD_TOP=$(gettop)
+
+. $ANDROID_BUILD_TOP/vendor/lineage/build/envsetup.sh