Update to 0.18 on SM-G870F with lineage-18.1-20201225-UNOFFICIAL-recovery-klteactivexx.img

Using /e/OS Setup
15

I have read about a solution somewhere 2 days ago
Unofficial Pi/e/ Community Build - s4mini Value Edition SM-i9195i "serranovelte" - #14 by piero
So, We have to modify the content of some files in the /e/.zip
to make the build that matching klteactivexx include klteactive codename

1) extract the e-0.18-p-20210815130098-dev-klteactivexx.zip,

2) Open /META-INF/com/android/metadata

we will add klteactive in the last line

pre-device=klteactivexx,klte

will become

pre-device=klteactivexx,klteactive,klte
clic here to compare with /e/ stock metadata for my serranoltexx 
ota-property-files=metadata:69:359         
ota-required-cache=0
ota-type=BLOCK
post-build=samsung/serranoltexx/serranolte:4.4.2/KOT49H/I9195XXUCQL2:user/release-keys
post-build-incremental=eng.root.20210814.095355
post-sdk-level=30
post-security-patch-level=2021-08-05
post-timestamp=1628934731
pre-device=serranolte,serranoltebmc,serranoltektt,serranoltexx

3) save it in the e-0.18-p-20210815130098-dev-klteactivexx folder,

OR replace the existing metadata by this new metadata,

4) open /META-INF/com/google/android/updater-script

we will insert a line betwenn the fist one and the seconde one

assert(getprop("ro.product.device") == "klteactivexx" || getprop("ro.build.product") == "klteactivexx" || 
       getprop("ro.product.device") == "klte" || getprop("ro.build.product") == "klte" || abort("E3004: This package is for device: klteactivexx,klte; this device is " + getprop("ro.product.device") + "."););

will become

assert(getprop("ro.product.device") == "klteactivexx" || getprop("ro.build.product") == "klteactivexx" || 
       getprop("ro.product.device") == "klteactive" || getprop("ro.build.product") == "klteactive" || 
       getprop("ro.product.device") == "klte" || getprop("ro.build.product") == "klte" || abort("E3004: This package is for device: klteactivexx,klte; this device is " + getprop("ro.product.device") + "."););
clic here to compare with /e/ stock metadata for my serranoltexx 
assert(getprop("ro.product.device") == "serranolte" || getprop("ro.build.product") == "serranolte" || 
       getprop("ro.product.device") == "serranoltebmc" || getprop("ro.build.product") == "serranoltebmc" || 
       getprop("ro.product.device") == "serranoltektt" || getprop("ro.build.product") == "serranoltektt" || 
       getprop("ro.product.device") == "serranoltexx" || getprop("ro.build.product") == "serranoltexx" || abort("E3004: This package is for device: serranolte,serranoltebmc,serranoltektt,serranoltexx; this device is  " + getprop("ro.product.device") + "."););

5) save it in the e-0.18-p-20210815130098-dev-klteactivexx folder,

OR replace the existing updater-script by this new updater-script,

6) make a .ZIP from the e-0.18-p-20210815130098-dev-klteactivexx folder.

7) rename the new .ZIP

OR download the modified Build to test e-0.18-p-20210815-modified-for-klteactive

8) try to install it with TWRP for the klte familly

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please share your feedback…

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https://forum.xda-developers.com/t/tutorial-the-updater-script-completely-explained.2377695/

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