From f5c3ec505b83a20d272a66305bca565e9ff38b04 Mon Sep 17 00:00:00 2001
From: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Date: Fri, 26 Apr 2024 14:49:59 +0200
Subject: [PATCH] add --with-keep-awake switch to prevent going into
 sleep/suspend

if used defaults to Awake for Windows and caffeinate for macOS

Change-Id: I35f41bf1fb63af05ce2ec1a7f4d7b50b310536a3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/166743
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>
Tested-by: Jenkins
---
 Makefile.in       | 16 ++++++++--------
 config_host.mk.in |  2 ++
 configure.ac      | 41 +++++++++++++++++++++++++++++++++++++++++
 3 files changed, 51 insertions(+), 8 deletions(-)

diff --git a/Makefile.in b/Makefile.in
index f55e92c94405..ac3e8aafb529 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -91,19 +91,19 @@ define gb_Top_GbuildModuleRules
 .PHONY: $(1).allbuild $(1).buildall $(1).allcheck $(1).checkall
 
 $(1): bootstrap fetch
-	cd $(SRCDIR)/$(2) && $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS)
+	$(KEEP_AWAKE_CMD) cd $(SRCDIR)/$(2) && $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS)
 
 $(1).build $(1).check $(1).coverage $(foreach target,$(gb_Top_MODULE_CHECK_TARGETS),$(1).$(target)): bootstrap fetch
-	cd $(SRCDIR)/$(2) && $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) $$(patsubst $(1).%,%,$$@)
+	$(KEEP_AWAKE_CMD) cd $(SRCDIR)/$(2) && $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) $$(patsubst $(1).%,%,$$@)
 
 $(1).clean $(1).showdeliverables:
 	cd $(SRCDIR)/$(2) && $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) $$(patsubst $(1).%,%,$$@)
 
 $(1).allbuild $(1).buildall: bootstrap fetch
-	$$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(WORKDIR)/Module/$(1)
+	$(KEEP_AWAKE_CMD) $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(WORKDIR)/Module/$(1)
 
 $(1).allcheck $(1).checkall: bootstrap fetch
-	$$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(WORKDIR)/Module/$(1) $(WORKDIR)/Module/check/$(1) $(WORKDIR)/Module/slowcheck/$(1)
+	$(KEEP_AWAKE_CMD) $$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(WORKDIR)/Module/$(1) $(WORKDIR)/Module/check/$(1) $(WORKDIR)/Module/slowcheck/$(1)
 
 $(1).all:
 	@echo "'make $(1).all' was renamed to 'make $(1).allcheck' (or use 'make $(1).allbuild' to build without unit tests)"
@@ -170,10 +170,10 @@ gbuild_TARGETS := AllLangHelp \
 
 # build a generic gbuild target
 $(foreach target,$(gbuild_TARGETS),$(target)_% $(foreach module,$(gbuild_modules),$(target)_$(module)/%)) UIConfig_modules/% %.genpatch: bootstrap fetch
-	$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
+	$(KEEP_AWAKE_CMD) $(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
 
 $(gbuild_TARGETS):
-	$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
+	$(KEEP_AWAKE_CMD) $(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $@
 
 #
 # Clean
@@ -291,9 +291,9 @@ bootstrap: check-if-root compilerplugins
 #
 build: bootstrap fetch $(if $(CROSS_COMPILING),cross-toolset,install-gdb-printers) \
     $(if $(filter check,$(MAKECMDGOALS)),$(if $(COMPILER_PLUGINS),$(if $(LODE_HOME),clang-format-check)))
-	$(MAKE) $(PARALLELISM_OPTION) $(IWYU_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(build_goal)
+	$(KEEP_AWAKE_CMD) $(MAKE) $(PARALLELISM_OPTION) $(IWYU_OPTION) $(GMAKE_OPTIONS) -f $(SRCDIR)/Makefile.gbuild $(build_goal)
 ifeq ($(OS),iOS)
-	$(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) ios
+	$(KEEP_AWAKE_CMD) $(MAKE) $(PARALLELISM_OPTION) $(GMAKE_OPTIONS) ios
 endif
 
 build-non-l10n-only build-l10n-only check debugrun translations packageinfo coverage $(gb_Top_MODULE_CHECK_TARGETS): build
diff --git a/config_host.mk.in b/config_host.mk.in
index 1d5480bacf61..70d73f0a32f5 100644
--- a/config_host.mk.in
+++ b/config_host.mk.in
@@ -790,6 +790,8 @@ include $(BUILDDIR)/config_$(gb_Side)_lang.mk
 # does use some of the variables defined above
 include @SRC_ROOT@/download.lst
 
+KEEP_AWAKE_CMD=@KEEP_AWAKE_CMD@
+
 # prep for WSL-as-helper-builds where build runs from within git-bash/MSYS that would otherwise
 # messes with anything that looks like a path (starts with /) but it cannot resolve
 export MSYS_NO_PATHCONV=1
diff --git a/configure.ac b/configure.ac
index 4263116f894b..1650686382ef 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2810,6 +2810,13 @@ AC_ARG_WITH(gtk3-build,
         [(Windows-only) In order to build GtkTiledViewer on Windows, pass the path
          to a GTK3 build, like '--with-gtk3-build=C:/gtk-build/gtk/x64/release'.]))
 
+AC_ARG_WITH(keep-awake,
+    AS_HELP_STRING([--with-keep-awake],
+        [command to prefix make with in order to prevent the system from going to sleep/suspend
+         while building.
+         If no command is specified, defaults to using Awake (from Microsoft PowerToys) on Windows
+         and caffeinate on macOS]))
+
 dnl ===================================================================
 dnl Branding
 dnl ===================================================================
@@ -15243,6 +15250,40 @@ AC_SUBST(SYSTEMD_ESCAPE)
 AC_SUBST(SYSTEMD_RUN)
 AC_SUBST(WITH_COREDUMPCTL)
 
+dnl ===================================================================
+dnl Checking whether to use a keep-awake helper
+dnl ===================================================================
+#"
+AC_MSG_CHECKING([whether to keep the system awake/prevent it from going into sleep/standby])
+if test -z "$with_keep_awake" -o "$with_keep_awake" = "no"; then
+    AC_MSG_RESULT([no])
+elif test "$with_keep_awake" = "yes"; then
+    AC_MSG_RESULT([yes (autodetect)])
+    AC_MSG_CHECKING([for a suitable keep-awake command])
+    if test "$_os" = "WINNT"; then
+        PathFormat "$(perl.exe -e 'print $ENV{"PROGRAMFILES"}')"
+        if test -f "$formatted_path_unix/PowerToys/PowerToys.Awake.exe"; then
+            AC_MSG_RESULT([using "Awake"])
+            # need to pass the windows-PID to awake, so get the PGID of the shell first to get
+            # make's PID and then use that to get the windows-PID.
+            # lots of quoting for both make ($$) as well as configure ('"'"') make that command
+            # much scarier looking than it actually is. Using make's shell instead of subshells in
+            # the recipe to keep the command that's echoed by make short.
+            KEEP_AWAKE_CMD=$formatted_path/PowerToys/PowerToys.Awake.exe' --display-on False --pid $(shell ps | awk '"'"'/^\s+'"'"'$$(ps | awk '"'"'/^\s+'"'"'$$$$'"'"'\s+/{print $$3}'"'"')'"'"'\s+/{print $$4}'"'"') &'
+        else
+            AC_MSG_ERROR(["Awake" not found - install Microsoft PowerToys or specify a custom command])
+        fi
+    elif test "$_os" = "Darwin"; then
+        AC_MSG_RESULT([using "caffeinate"])
+        KEEP_AWAKE_CMD="caffeinate"
+    else
+        AC_MSG_ERROR([no default available for $_os, please specify manually])
+    fi
+else
+    AC_MSG_RESULT([yes (custom command: $with_keep_awake)])
+fi
+AC_SUBST(KEEP_AWAKE_CMD)
+
 dnl ===================================================================
 dnl Setting up the environment.
 dnl ===================================================================