vendor boot: support dts/dtb compiling in 'pack'

README.md

@@ -172,6 +172,35 @@ Please note that to use 'gradle flash', your host machine must be connectted to
 
 </details>
 
+<details>
+  <summary>edit device-tree blob(dtb) inside vendor_boot.img</summary>
+
+If you want to edit the device-tree blob in place:
+
+```bash
+cp <your_vendor_boot_image> vendor_boot.img
+cp <your_vbmeta_image> vbmeta.img
+./gradlew unpack
+==> now you can edit build/unzip_boot/dtb.src directly
+./gradlew pack
+```
+
+During unpack stage, dtb will be dumped to file `build/unzip_boot/dtb`, dts will be decompiled to `build/unzip_boot/dtb.src`.
+You can edit `dtb.src` directly, and it will be compiled to dtb duing repack stage.
+
+If you just want to replace the dtb with the one that is compiled outside this tool, please
+
+```bash
+cp <your_vendor_boot_image> vendor_boot.img
+cp <your_vbmeta_image> vbmeta.img
+./gradlew unpack
+rm build/unzip_boot/dtb.src
+cp <your_dtb> build/unzip_boot/dtb
+./gradlew pack
+```
+
+</details>
+
 <details>
   <summary>working with system.img</summary>
 

bbootimg/src/main/kotlin/bootimg/v3/VendorBoot.kt

@@ -23,6 +23,7 @@ import cfig.bootimg.Signer
 import cfig.helper.Helper
 import cfig.helper.Dumpling
 import cfig.packable.VBMetaParser
+import cfig.utils.DTC
 import com.fasterxml.jackson.databind.ObjectMapper
 import de.vandermeer.asciitable.AsciiTable
 import org.apache.commons.exec.CommandLine
@@ -264,6 +265,10 @@ data class VendorBoot(
                 this.ramdisk.size = this.ramdisk_table.ramdidks.sumOf { File(it.file).length() }.toInt()
             }
         }
+        //update dtb
+        if (File(this.dtb.file + ".src").exists()) {
+            check(DTC().compile(this.dtb.file + ".src", this.dtb.file)) { "fail to compile dts" }
+        }
         this.dtb.size = File(this.dtb.file).length().toInt()
         //header
         FileOutputStream(this.info.output + ".clear", false).use { fos ->

src/integrationTest/resources_2

@@ -1 +1 @@
-Subproject commit 9204d80a97535f5284f96f7f145edeae7d02cec4
+Subproject commit 03c9b422e4cc418e2484b7bfeef97d8f3e920db9