#Building Guide to Bringup Rom
#Setting up linux distro
For setting up linux distro we need to install some packages into our system for that , copy paste the preceeing code into your linux distro
sudo apt-get update && sudo apt-get upgrade
/This will install the latest files of your linux distro/
Then to add those packages necessary for building , copy paste the preceding code
sudo apt-get install bc bison build-essential curl flex g++-multilib gcc-multilib git gnupg gperf imagemagick lib32ncurses5-dev lib32readline6-dev lib32z1-dev libesd0-dev liblz4-tool libncurses5-dev libsdl1.2-dev libwxgtk3.0-dev libxml2 libxml2-utils lzop pngcrush schedtool squashfs-tools xsltproc zip zlib1g-dev openjdk-8-jdk
#Now we need to install repo.
sudo apt-get install repo
#Now lets configure you github username and email globally.
git config --global user.name "FIRST_NAME LAST_NAME"
git config --global user.email "YOUR EMAIL"
#Lets make a directory where we will intialise our rom source
mkdir lineage
#It will make a directory named lineage
#Now Lets sync a Source into the lineage directory we have made
cd lineage
repo init -u "CLONE_URL" -b "BRANCH"
#For example lets clone Lineage Source for Pie.
#So the Branch will be lineage-16.0 for oreo it will be lineage-15.1.
repo init -u git://github.com/LineageOS/android.git -b lineage-16.0
#Now To sync the Source.
repo sync -j$(nproc --all)
#Wait for the sync to finish ,it takes time.
#Now we have to Clone Device tree, Vendor blobs and kernel Source, Search on github for your own device. #For example I am taking daisy (Mi A2 Lite)
#Lets clone device tree
git clone https://github.com/HachimanH20/android_device_xiaomi_daisy.git -b lineage-16.0 device/xiaomi/daisy
#Here the branch is lineage-16.0 and location is device/xiaomi/daisy where the device tree will bs cloned
#Lets clone vendor blobs
git clone https://github.com/HachimanH20/vendor_xiaomi_daisy.git -b pie vendor/xiaomi/daisy
#Here the branch is pie and clone path is vendor/xiaomi/daisy
#Lets clone Kernel Source
git clone https://github.com/HachimanH20/Caf_Kernel_Daisy.git -b Caf-kernel kernel/xiaomi/daisy
#Here the branch is Caf-kernel and the clone path is kernel/xiaomi/daisy
#Now after cloning device tree , vendor blobs and kernel source we need to edit some Make files in Our devicetree in order to build the Rom #Make files which we need to edit are AndroidProducts.mk , lineage_daisy.mk(prefix differs from source to source) #we also need to edit vendorsetup.sh and the dependencies. #First lets go to the device tree directory where we have cloned it
cd device/xiaomi/daisy
#Now lets edit the AndroidProducts.mk
nano AndroidP*
#you can see i didnt write the whole name of the file and also added a * at the suffix , well the main use of this is to reduce the writing, as it will automatically find the file you are targetting it also works to open directories
#Now we have to rename the
$(LOCAL_DIR)/mk_daisy.mk to $(LOCAL_DIR)/lineage_daisy.mk
#save and exit i.e., ctrl + X then press y and then enter.
#Now we have to rename
mk_daisy.mk to lineage_daisy.mk
#save and exit
#We need to edit the lineage_daisy.mk makefile
nano lineage_daisy.mk
#Here we need to edit some specific lines
$(call inherit-product, vendor/mk/config/common_full_phone.mk) to $(call inherit-product, vendor/lineage/config/common_full_phone.mk)
PRODUCT_NAME := mk_daisy to PRODUCT_NAME := lineage_daisy
#save and exit
#Now go Back to the Rom directory
cd ../../../ or cd ~ && cd lineage
And start the build
. build/envsetup.sh
lunch lineage_daisy-userdebug
brunch tulip
/** your rom should be compiling , this is a simple guide for building a custom rom from source*/