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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
import java.text.SimpleDateFormat
/**
* Generates a "unique" versionCode for release builds.
*
* The resulting versionCode depends on the local timezone of the machine running this script.
* This is OK because we only use this for release builds on CI, where the timezone is fixed.
*
* Format: byDDDHHmm
* - b = base / epoch digit
* Historically hardcoded to "3". This digit is incremented when the year-derived
* component overflows its single digit (e.g., in 2026).
* - y = 1 digit derived from (two-digit year - 16), modulo 10
* - DDD = day of year (001–366), zero-padded to 3 digits
* - HHmm = 24h time (00–23)(00–59)
*
* Example:
* Sept 6, 2017 @ 09:41
* year = 17 - 16 = 1
* base = 3
* -> 3-1-249-09-41 -> 312490941
*
* Historical note:
* Focus first shipped in 2017. The original scheme unconditionally used (yy - 16) which
* only fit in a single digit from 2017–2025.
*
* 2026 rollover:
* In 2026, (yy - 16) became 10. Allowing this to grow to two digits breaks the intended
* byDDDHHmm layout and can exceed Play / int limits.
*
* To preserve:
* - a single-digit `y`
* - monotonic versionCodes across year boundaries
*
* we keep `y` as (yearOffset % 10) and carry overflow into the base digit:
* 2025 -> base=3, y=9 -> 39DDDHHmm
* 2026 -> base=4, y=0 -> 40DDDHHmm
*/
ext {
// "Epoch" digit(s). Historically this was "3".
// We bump it by +1 each time (yy - 16) crosses another multiple of 10 (i.e., 2026, 2036, ...).
def epochDigit = 3
def today = new Date()
def yy = (new SimpleDateFormat("yy").format(today) as int)
def yearOffset = yy - 16 // 2017 -> 1, 2025 -> 9, 2026 -> 10, etc.
if (yearOffset < 0) {
throw new GradleException(
"versionCode yearOffset underflow: yearOffset=$yearOffset (yy=$yy)."
)
}
// Keep the "y" component as one digit, and carry overflow into the epoch digit.
def carry = (int) (yearOffset / 10)
def yearDigit = (int) (yearOffset % 10)
def epoch = epochDigit + carry
if (epoch >= 10) {
throw new GradleException(
"versionCode epoch overflow: epoch=$epoch (yy=$yy). Update versionCode scheme."
)
}
// We use the day in the Year (e.g. 248) as opposed to month + day (0510) because it's one digit shorter.
// If needed we pad with zeros (e.g. 25 -> 025)
def day = String.format("%03d", (new SimpleDateFormat("D").format(today) as int))
// We append the hour in day (24h) and minute in hour (7:26 pm -> 1926). We do not append
// seconds. This assumes that we do not need to build multiple release(!) builds the same
// minute.
def time = new SimpleDateFormat("HHmm").format(today)
// Build the final versionCode using the previously-calculated inputs.
def versionCode = ("${epoch}${yearDigit}${day}${time}" as long)
// The Play Console has historically enforced a 2,100,000,000 cap. Keep a defensive ceiling here.
// Even without this, Android requires versionCode to fit in a signed 32-bit int.
def MAX_VERSION_CODE = 2_100_000_000
if (versionCode > MAX_VERSION_CODE) {
throw new GradleException(
"Generated versionCode exceeds MAX_VERSION_CODE ($MAX_VERSION_CODE): $versionCode (from $versionCodeStr)"
)
}
if (versionCode > Integer.MAX_VALUE) {
throw new GradleException(
"Generated versionCode exceeds Integer.MAX_VALUE: $versionCode (from $versionCodeStr)"
)
}
generatedVersionCode = (versionCode as int)
println("Generated versionCode: $generatedVersionCode")
println()
}
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