- $filechk is used to check if a file is up to date.
- $cmd includes logic for echoing commands and deleting intermediate
files on interrupt. Skip all of that in --dry-run mode and just execute
the command.
- $cmd_and_savecmd executes the command and echoes it into .<target>.cmd.
- $if_changed_dep executes the command if any dependencies have changed.
- $cmd_and_fixdep executes the command and updates .<target>.cmd.
Skip all of that in --dry-run mode and just execute the command.
Signed-off-by: Vegard Nossum <vegard.nossum@xxxxxxxxxx>
---
scripts/Kbuild.include | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index ed8a7493524b2..a1ef3b1828bb3 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -94,6 +94,7 @@ kecho := $($(quiet)kecho)
# - If no file exist it is created
# - If the content differ the new file is used
# - If they are equal no change, and no timestamp update
+ifndef dry_run
define filechk
$(check-FORCE)
$(Q)set -e; \
@@ -105,6 +106,14 @@ define filechk
mv -f $(tmp-target) $@; \
fi
endef
+else
+# simplify and write the output directly if we're just printing
+# the commands
+define filechk
+ mkdir -p $(dir $@)
+ { $(filechk_$(1)); } > $@
+endef
+endif
###
# Shorthand for $(Q)$(MAKE) -f scripts/Makefile.build obj=
@@ -149,8 +158,13 @@ delete-on-interrupt = \
$(foreach sig, HUP INT QUIT TERM PIPE, \
trap 'rm -f $@; trap - $(sig); kill -s $(sig) $$$$' $(sig);))
+ifndef dry_run
# print and execute commands
cmd = @$(if $(cmd_$(1)),set -e; $($(quiet)log_print) $(delete-on-interrupt) $(cmd_$(1)),:)
+else
+# just execute (...which will actually "just print" with make -n)
+cmd = @$(if $(cmd_$(1)),$(cmd_$(1)),)
+endif
###
# if_changed - execute command if any prerequisite is newer than
@@ -196,17 +210,30 @@ if-changed-cond = $(newer-prereqs)$(cmd-check)$(check-FORCE)
# Execute command if command has changed or prerequisite(s) are updated.
if_changed = $(if $(if-changed-cond),$(cmd_and_savecmd),@:)
+ifndef dry_run
cmd_and_savecmd = \
$(cmd); \
printf '%s\n' 'savedcmd_$@ := $(make-cmd)' > $(dot-target).cmd
+else
+cmd_and_savecmd = $(cmd)
+endif
+ifndef dry_run
# Execute the command and also postprocess generated .d dependencies file.
if_changed_dep = $(if $(if-changed-cond),$(cmd_and_fixdep),@:)
+else
+# Just execute the command directly
+if_changed_dep = $(cmd)
+endif
+ifndef dry_run
cmd_and_fixdep = \
$(cmd); \
scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(dot-target).cmd;\
rm -f $(depfile)
+else
+cmd_and_fixdep = $(cmd)
+endif
# Usage: $(call if_changed_rule,foo)
# Will check if $(cmd_foo) or any of the prerequisites changed,
--
2.34.1
