BT_EXPIRE: tester builds stop working 14 days after build (compile gate)
Distributed test zips go stale and stray. BT_EXPIRE (CMake option,
DEFAULT ON so a zip can never accidentally ship without it) makes the
exe refuse to start BT_EXPIRE_DAYS (default 14) after its build day:
boot logs the remaining window, an expired build logs + shows a
"test build expired -- ask the operator for the current build" box and
exits. btversion.h now stamps BT_BUILD_UNIX (UTC-midnight-rounded so
the only-on-change header churns once per day, not every build) +
BT_BUILD_DATE. Dev is unaffected: every build re-stamps the day.
-DBT_EXPIRE=OFF builds a non-expiring exe; mkdist reads the cache and
marks such a zip "-noexpire" + prints a warning, and the tester README
expiry note is {EXPIRE}-marker-gated like the steam lines. Second
compile-gate exception after BT_STEAM (convention updated in
glass-cockpit.md). Quality gate, not DRM -- a clock rollback defeats it.
Verified live: default build logs "test build window: 14 day(s) left";
a -DBT_EXPIRE_DAYS=0 build logs TEST BUILD EXPIRED and parks on the
explanation box (window title checked) without starting the game;
restored to 14 and rebuilt clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
co-authored by
Claude Opus 4.8
Claude Opus 4.8
parent
753540de96
commit
eb618fe9e6
@@ -29,6 +29,19 @@ set(DXSDK "C:/Program Files (x86)/Microsoft DirectX SDK (June 2010)" CACHE PATH
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option(BT_STEAM "Steam transport + lobby (Steamworks SDK -- EXCLUDE from public releases)" OFF)
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message(STATUS "bt411: BT_STEAM=${BT_STEAM}")
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#===========================================================================#
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# Tester-build expiry tripwire (2026-07-22). Distributed test zips go stale
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# and stray: with BT_EXPIRE on (the DEFAULT, so a zip can never accidentally
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# ship without it) the exe refuses to start BT_EXPIRE_DAYS after its build
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# date, telling the tester to fetch a current build. Dev is unaffected --
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# btversion.h re-stamps the build day on every build. Disable for a
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# non-expiring build with -DBT_EXPIRE=OFF (mkdist marks such a zip
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# '-noexpire'). Quality gate, not DRM -- a clock rollback defeats it.
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#===========================================================================#
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option(BT_EXPIRE "Expire the exe BT_EXPIRE_DAYS after its build date" ON)
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set(BT_EXPIRE_DAYS 14 CACHE STRING "Days a BT_EXPIRE build keeps running")
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message(STATUS "bt411: BT_EXPIRE=${BT_EXPIRE} (${BT_EXPIRE_DAYS} days)")
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set(BT_DEFS WIN32 _WINDOWS UNICODE _UNICODE NOMINMAX
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_CRT_SECURE_NO_DEPRECATE _CRT_SECURE_NO_WARNINGS
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_SILENCE_STDEXT_HASH_DEPRECATION_WARNINGS _SILENCE_ALL_CXX17_DEPRECATION_WARNINGS
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@@ -366,6 +379,9 @@ target_sources(btl4 PRIVATE
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)
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target_include_directories(btl4 BEFORE PRIVATE "${CMAKE_SOURCE_DIR}/game/glass")
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target_compile_definitions(btl4 PRIVATE ${BT_DEFS})
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if(BT_EXPIRE)
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target_compile_definitions(btl4 PRIVATE BT_EXPIRE=1 BT_EXPIRE_DAYS=${BT_EXPIRE_DAYS})
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endif()
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target_compile_options(btl4 PRIVATE ${BT_OPTS})
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target_link_libraries(btl4 PRIVATE
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bt410_l4
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@@ -49,9 +49,16 @@ version skew (a stale steam exe shipped 2 days behind), tripled build time, and
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glass + scripted click → ConfigureMappables end-to-end; exe runs WITHOUT steam_api.dll
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present; glass zero-arg → menu; 2-node loopback MP (145 ticks each); `BT_STEAM_NET=1`
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without Steam → "staying on Winsock" + game runs.
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- **Convention:** every `BT_*` name is a RUNTIME env gate (`BTEnvOn`) — with the single
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exception of `BT_STEAM`, the license compile gate above. Do not add another compile gate
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without updating this file.
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- **Convention:** every `BT_*` name is a RUNTIME env gate (`BTEnvOn`) — with TWO exceptions,
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both compile gates: `BT_STEAM` (the license gate above) and **`BT_EXPIRE` (2026-07-22, the
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tester-build expiry tripwire)** — default ON, the exe refuses to start `BT_EXPIRE_DAYS`
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(default 14) after its build DAY (`btversion.h BT_BUILD_UNIX`, UTC-midnight-rounded so the
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only-on-change header churns once per day, not per build). Boot logs `[boot] test build
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window: N day(s) left`; expired = log + MessageBox + exit. Disable: `-DBT_EXPIRE=OFF`
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(mkdist marks such a zip `-noexpire` + warns; README expiry note is `{EXPIRE}`-marker-gated).
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Quality gate, not DRM — a clock rollback defeats it. Verified both paths live
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(`-DBT_EXPIRE_DAYS=0` force-expire run). Do not add another compile gate without updating
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this file.
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- No weak-linkage/optional symbols — `/FORCE` turns unresolved externals into runtime AVs
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([[reconstruction-gotchas]]); everything links always, so this class of trap no longer varies
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by build flavor.
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@@ -24,6 +24,7 @@
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#include <iostream>
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#include <cstdlib>
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#include <cstring>
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#include <ctime> // BT_EXPIRE tripwire (time)
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#include <string>
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#include <vector>
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@@ -542,6 +543,39 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
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std::cout << "BattleTech " << BT_VERSION_FULL
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<< " (win32 reconstruction of Tesla 4.10)" << std::endl << std::flush;
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#ifdef BT_EXPIRE
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// TESTER-BUILD EXPIRY TRIPWIRE (compile gate BT_EXPIRE, default ON --
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// see CMakeLists). Distributed zips go stale and stray; refuse to run
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// BT_EXPIRE_DAYS after the build day (btversion.h BT_BUILD_UNIX, UTC
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// midnight). Dev builds re-stamp every build, so this never fires
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// locally. Quality gate, not DRM.
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{
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const time_t expires = (time_t)BT_BUILD_UNIX
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+ (time_t)BT_EXPIRE_DAYS * 86400;
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const time_t now = time(0);
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if (now >= expires)
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{
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std::cout << "[boot] TEST BUILD EXPIRED (built " << BT_BUILD_DATE
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<< ", " << BT_EXPIRE_DAYS << "-day test window)"
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<< std::endl << std::flush;
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char expired_text[256];
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sprintf(expired_text,
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"This BattleTech test build (%s, built %s) has expired.\n\n"
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"Test builds stop working %d days after they are made so\n"
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"stale copies don't wander around.\n\n"
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"Ask the operator for the current build.",
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BT_VERSION_STRING, BT_BUILD_DATE, (int)BT_EXPIRE_DAYS);
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MessageBoxA(NULL, expired_text,
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"BattleTech -- test build expired", MB_OK | MB_ICONWARNING);
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return 0;
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}
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int days_left = (int)((expires - now + 86399) / 86400);
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std::cout << "[boot] test build window: " << days_left
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<< " day(s) left (built " << BT_BUILD_DATE << ")"
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<< std::endl << std::flush;
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}
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#endif
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// CPU pin (timing stability). BT_AFFINITY overrides the mask; =0 disables --
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// required for multi-instance runs (two instances pinned to core 0 starve
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// each other, and the L4NET connect-retry loop busy-waits).
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@@ -43,3 +43,5 @@ An Xbox controller works out of the box. Rebind keys in
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content\bindings.txt (regenerates with defaults if deleted).
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This build: {VERSION}. Private -- do not redistribute.
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{EXPIRE}Test builds STOP WORKING 14 days after they are made -- if the game
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{EXPIRE}says it has expired, just grab the operator's newest zip.
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@@ -7,6 +7,13 @@
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#
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# Invoked: cmake -DOUT=<header> -DSRC=<repo root> -P btversion.cmake
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# Build DAY stamp (UTC midnight epoch) for the tester-build expiry tripwire
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# (BT_EXPIRE). Day precision on purpose: the header is written only-on-change,
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# so a per-second stamp would churn btl4main.obj on every no-op build.
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string(TIMESTAMP BT_NOW_UNIX "%s" UTC)
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math(EXPR BT_BUILD_UNIX "(${BT_NOW_UNIX} / 86400) * 86400")
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string(TIMESTAMP BT_BUILD_DATE "%Y-%m-%d" UTC)
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execute_process(COMMAND git rev-list --count HEAD
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WORKING_DIRECTORY "${SRC}"
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OUTPUT_VARIABLE BT_BUILD OUTPUT_STRIP_TRAILING_WHITESPACE
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@@ -44,6 +51,8 @@ set(CONTENT "// generated by tools/btversion.cmake -- do not edit, not in git
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#define BT_VERSION_STRING \"4.11.${BT_BUILD}\"
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#define BT_VERSION_HASH \"${BT_HASH}${BT_DIRTY}\"
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#define BT_VERSION_FULL \"4.11.${BT_BUILD} (${BT_HASH}${BT_DIRTY})\"
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#define BT_BUILD_UNIX ${BT_BUILD_UNIX}
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#define BT_BUILD_DATE \"${BT_BUILD_DATE}\"
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")
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# write only when changed so incremental builds don't churn
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@@ -54,6 +54,7 @@ def main():
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# the CMake cache; a steam-OFF zip must carry neither play_steam.bat nor
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# steam_api.dll (a stale DLL can linger from an earlier ON build).
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steam_on = False
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cache = ""
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try:
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cache = open("build/CMakeCache.txt", encoding="utf-8", errors="ignore").read()
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steam_on = "BT_STEAM:BOOL=ON" in cache
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@@ -62,6 +63,15 @@ def main():
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print(" BT_STEAM=%s (from build/CMakeCache.txt)" % ("ON" if steam_on else "OFF"))
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if not steam_on:
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name += "-nosteam" # distinct name: never clobbers the dev-flavor zip
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# TESTER-BUILD EXPIRY (BT_EXPIRE, default ON): a zip cut from an
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# expire-OFF build never dies in the field -- mark it loudly so it is a
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# deliberate act, not an accident.
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expire_on = "BT_EXPIRE:BOOL=ON" in cache if cache else True
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print(" BT_EXPIRE=%s (from build/CMakeCache.txt)" % ("ON" if expire_on else "OFF"))
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if not expire_on:
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name += "-noexpire"
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print(" WARNING: this zip NEVER EXPIRES -- intended for distribution?")
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zpath = os.path.join(outdir, name + ".zip")
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exes = ["build/Release/btl4.exe"]
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@@ -102,6 +112,10 @@ def main():
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lines = [l.replace("{STEAM}", "") for l in lines]
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else: # steam-free zip: strip them
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lines = [l for l in lines if "{STEAM}" not in l]
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if expire_on: # same treatment for expiry note
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lines = [l.replace("{EXPIRE}", "") for l in lines]
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else:
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lines = [l for l in lines if "{EXPIRE}" not in l]
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readme = "".join(lines)
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z.writestr(name + "/README.txt", readme)
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for p in bats: # bats at the zip ROOT (next to
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