Added script to generate the OTA json file

Signed-off-by: Arindam Bhattacharjee <abhattacharjee717@gmail.com>

Author: userariii

README.md

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+# android-OTA
+OTA (Over The Air) update of android customOS
+Instructions
+
+Clone this repository with the following command...
+```bash
+git clone -b 15 https://github.com/AndroidOne-Experience/OTA-update.git OTA
+```
+Run:
+```bash
+bash ./OTA/generate_OTA.sh
+```

changelogs/miatoll.md

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+# 06-Apr-2025
+- Initial Android 15 QPR2 Build

generate_ota.sh

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+#!/bin/bash
+
+# Path to the maintainer info file (not needed anymore in minimal format)
+
+# Prompt user for device codename
+read -p "Enter device codename (e.g. PL2, miatoll): " codename
+
+# Prompt user for release tag
+read -p "Enter release tag (e.g. mm-yyyy): " release_tag
+
+# OTA package directory and pattern
+ota_package_dir="out/target/product/${codename}"
+file_path=$(ls ${ota_package_dir}/AndroidOne-*${codename}-*.zip 2>/dev/null)
+
+# Check if the OTA package exists
+if [[ -z "$file_path" ]]; then
+  echo "OTA package file not found in ${ota_package_dir}."
+  echo "Ensure the file follows the pattern: AndroidOne-*${codename}-*.zip"
+  exit 1
+else
+  echo "Found OTA package: $file_path"
+fi
+
+# Extract info
+filename=$(basename "$file_path")
+datetime=$(grep -oP '^ro.build.date.utc=\K\d+' "${ota_package_dir}/system/build.prop" 2>/dev/null || echo "UNKNOWN")
+id=$(sha256sum "$file_path" | awk '{ print $1 }')
+size=$(stat -c%s "$file_path")
+version="15"  # or change based on release/version scheme
+
+# Replace this with your actual storage URL base
+base_url="https://storage.googleapis.com/rom"
+url="${base_url}/${filename}"
+
+# Output directory
+output_dir="./OTA/devices"
+mkdir -p "$output_dir"
+output_file="${output_dir}/${codename}.json"
+
+# Create the JSON
+json=$(cat <<EOF
+{
+  "response": [
+    {
+      "datetime": "$datetime",
+      "filename": "$filename",
+      "id": "$id",
+      "size": $size,
+      "url": "$url",
+      "version": "$version"
+    }
+  ]
+}
+EOF
+)
+
+# Save prettified if jq is available
+if command -v jq &> /dev/null; then
+  echo "$json" | jq '.' > "$output_file"
+else
+  echo "$json" > "$output_file"
+fi
+
+echo "Minimal OTA JSON saved to $output_file"