[PATCH] consolidate command line escaping

From: Jan Beulich
Date: Mon Jan 30 2006 - 04:02:59 EST


From: Jan Beulich <jbeulich@xxxxxxxxxx>

While the recent change to also escape # symbols when storing C-file
compilation command lines was helpful, it should be in effect for all
command lines, as much as the dollar escaping should be in effect for
C-source compilation commands. Additionally, for better readability and
maintenance, consolidating all the escaping (single quotes, dollars,
and now sharps) was also desirable.

Signed-Off-By: Jan Beulich <jbeulich@xxxxxxxxxx>


From: Jan Beulich <jbeulich@xxxxxxxxxx>

While the recent change to also escape # symbols when storing C-file
compilation command lines was helpful, it should be in effect for all
command lines, as much as the dollar escaping should be in effect for
C-source compilation commands. Additionally, for better readability and
maintenance, consolidating all the escaping (single quotes, dollars,
and now sharps) was also desirable.

Signed-Off-By: Jan Beulich <jbeulich@xxxxxxxxxx>

diff -Npru /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/Kbuild.include 2.6.16-rc1-cmd-escape/scripts/Kbuild.include
--- /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/Kbuild.include 2006-01-27 15:10:56.000000000 +0100
+++ 2.6.16-rc1-cmd-escape/scripts/Kbuild.include 2006-01-27 09:49:15.000000000 +0100
@@ -51,8 +51,7 @@ endef
build := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.build obj

# If quiet is set, only print short version of command
-cmd = @$(if $($(quiet)cmd_$(1)),\
- echo ' $(call escsq,$($(quiet)cmd_$(1)))' &&) $(cmd_$(1))
+cmd = @$(echo-cmd) $(cmd_$(1))

# Add $(obj)/ for paths that is not absolute
objectify = $(foreach o,$(1),$(if $(filter /%,$(o)),$(o),$(obj)/$(o)))
@@ -75,24 +74,24 @@ endif
echo-cmd = $(if $($(quiet)cmd_$(1)), \
echo ' $(call escsq,$($(quiet)cmd_$(1)))';)

+make-cmd = $(subst \#,\\\#,$(subst $$,$$$$,$(call escsq,$(cmd_$(1)))))
+
# function to only execute the passed command if necessary
# >'< substitution is for echo to work, >$< substitution to preserve $ when reloading .cmd file
# note: when using inline perl scripts [perl -e '...$$t=1;...'] in $(cmd_xxx) double $$ your perl vars
#
if_changed = $(if $(strip $? $(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
@set -e; \
- $(echo-cmd) \
- $(cmd_$(1)); \
- echo 'cmd_$@ := $(subst $$,$$$$,$(call escsq,$(cmd_$(1))))' > $(@D)/.$(@F).cmd)
+ $(echo-cmd) $(cmd_$(1)); \
+ echo 'cmd_$@ := $(make-cmd)' > $(@D)/.$(@F).cmd)

# execute the command and also postprocess generated .d dependencies
# file
if_changed_dep = $(if $(strip $? $(filter-out FORCE $(wildcard $^),$^)\
$(call arg-check, $(cmd_$(1)), $(cmd_$@)) ), \
@set -e; \
- $(echo-cmd) \
- $(cmd_$(1)); \
- scripts/basic/fixdep $(depfile) $@ '$(subst $$,$$$$,$(call escsq,$(cmd_$(1))))' > $(@D)/.$(@F).tmp; \
+ $(echo-cmd) $(cmd_$(1)); \
+ scripts/basic/fixdep $(depfile) $@ '$(make-cmd)' > $(@D)/.$(@F).tmp; \
rm -f $(depfile); \
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd)

diff -Npru /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/Makefile.build 2.6.16-rc1-cmd-escape/scripts/Makefile.build
--- /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/Makefile.build 2006-01-27 15:10:56.000000000 +0100
+++ 2.6.16-rc1-cmd-escape/scripts/Makefile.build 2006-01-25 09:55:53.000000000 +0100
@@ -177,12 +177,10 @@ cmd_modversions = \
endif

define rule_cc_o_c
- $(if $($(quiet)cmd_checksrc),echo ' $($(quiet)cmd_checksrc)';) \
- $(cmd_checksrc) \
- $(if $($(quiet)cmd_cc_o_c),echo ' $(call escsq,$($(quiet)cmd_cc_o_c))';) \
- $(cmd_cc_o_c); \
+ $(call echo-cmd,checksrc) $(cmd_checksrc) \
+ $(call echo-cmd,cc_o_c) $(cmd_cc_o_c); \
$(cmd_modversions) \
- scripts/basic/fixdep $(depfile) $@ '$(call escsq,$(cmd_cc_o_c))' > $(@D)/.$(@F).tmp; \
+ scripts/basic/fixdep $(depfile) $@ '$(call make-cmd,cc_o_c)' > $(@D)/.$(@F).tmp; \
rm -f $(depfile); \
mv -f $(@D)/.$(@F).tmp $(@D)/.$(@F).cmd
endef
diff -Npru /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/basic/fixdep.c 2.6.16-rc1-cmd-escape/scripts/basic/fixdep.c
--- /home/jbeulich/tmp/linux-2.6.16-rc1/scripts/basic/fixdep.c 2006-01-27 15:10:56.000000000 +0100
+++ 2.6.16-rc1-cmd-escape/scripts/basic/fixdep.c 2006-01-27 09:50:59.000000000 +0100
@@ -132,20 +132,10 @@ void usage(void)

/*
* Print out the commandline prefixed with cmd_<target filename> :=
- * If commandline contains '#' escape with '\' so make to not see
- * the '#' as a start-of-comment symbol
- **/
+ */
void print_cmdline(void)
{
- char *p = cmdline;
-
- printf("cmd_%s := ", target);
- for (; *p; p++) {
- if (*p == '#')
- printf("\\");
- printf("%c", *p);
- }
- printf("\n\n");
+ printf("cmd_%s := %s\n\n", target, cmdline);
}

char * str_config = NULL;