convert man page makefile to make.rules format

Make.rules

@@ -89,6 +89,9 @@ endif
 ifneq ($(origin targets),file)
 targets		:=
 endif
+ifneq ($(origin docs),file)
+docs		:=
+endif
 
 src		:=
 obj		:=
@@ -259,6 +262,18 @@ $(__progs): $(obj)/%: $(cobjs) FORCE
 
 targets += $(__progs) $(cobjs)
 
+#####
+# Man pages
+
+quiet_cmd_scdoc = SCDOC   $@
+      cmd_scdoc = $(SCDOC) < $< > $@
+
+__scdocs	:= $(addprefix $(obj)/,$(sort $(scdocs-y)))
+docs		+= $(__scdocs)
+
+$(__scdocs): $(obj)/%: $(src)/%.scd FORCE
+	$(call if_changed,scdoc)
+
 ###
 # why - tell why a a target got build
 ifeq ($(VERBOSE),2)
@@ -268,9 +283,9 @@ why =                                                                        \
             $(if $(strip $(any-prereq)),- due to: $(any-prereq),             \
                 $(if $(arg-check),                                           \
                     $(if $(cmd_$@),- due to command line change: $(arg-check),             \
-                        $(if $(filter $@, $(targets)),                       \
+                        $(if $(filter $@, $(targets) $(docs)),               \
                             - due to missing .cmd file,                      \
-                            - due to $(notdir $@) not in $$(targets)         \
+                            - due to $(notdir $@) not in $$(targets) or $$(docs) \
                          )                                                   \
                      )                                                       \
                  )                                                           \
@@ -291,7 +306,10 @@ endif
 compile: generate $(targets)
 	@:
 
-install: $(targets) FORCE
+docs: $(docs) $(targets)
+	@:
+
+install: docs $(targets) FORCE
 
 generate:
 
@@ -305,7 +323,8 @@ endif
 		$(sort	$(progs-y) $(progs-n) $(progs-) \
 			$(shlibs-y) $(shlibs-n) $(shlibs-) \
 			$(libs-y) $(libs-n) $(libs-) \
-			$(generate-y) $(generate-n) $(generate-)))
+			$(generate-y) $(generate-n) $(generate-) \
+			$(scdocs-y) $(scdocs-n) $(scdocs-)))
 
 ifeq ($(origin VERSION),command line)
 DIST_VERSION=$(VERSION)
@@ -326,7 +345,8 @@ FORCE:
 # exist, we will rebuild anyway in that case.
 
 targets := $(wildcard $(sort $(targets)))
-cmd_files := $(wildcard $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd))
+docs := $(wildcard $(sort $(docs)))
+cmd_files := $(wildcard $(foreach f,$(targets) $(docs),$(dir $(f)).$(notdir $(f)).cmd))
 
 ifneq ($(cmd_files),)
   include $(cmd_files)

doc/Makefile

-$(obj)/%: $(src)/%.scd
-	$(SCDOC) < $< > $@
+scdocs-y += \
+	apk-cache.5 \
+	apk-keys.5 \
+	apk-repositories.5 \
+	apk-world.5 \
+	apk.8 \
+	apk-add.8 \
+	apk-audit.8 \
+	apk-cache.8 \
+	apk-del.8 \
+	apk-dot.8 \
+	apk-fetch.8 \
+	apk-fix.8 \
+	apk-index.8 \
+	apk-info.8 \
+	apk-list.8 \
+	apk-manifest.8 \
+	apk-policy.8 \
+	apk-stats.8 \
+	apk-update.8 \
+	apk-upgrade.8 \
+	apk-verify.8 \
+	apk-version.8
 
-MAN_5=$(obj)/apk-cache.5 \
-	$(obj)/apk-keys.5 \
-	$(obj)/apk-repositories.5 \
-	$(obj)/apk-world.5
-
-MAN_8=$(obj)/apk.8 \
-	$(obj)/apk-add.8 \
-	$(obj)/apk-audit.8 \
-	$(obj)/apk-cache.8 \
-	$(obj)/apk-del.8 \
-	$(obj)/apk-dot.8 \
-	$(obj)/apk-fetch.8 \
-	$(obj)/apk-fix.8 \
-	$(obj)/apk-index.8 \
-	$(obj)/apk-info.8 \
-	$(obj)/apk-list.8 \
-	$(obj)/apk-manifest.8 \
-	$(obj)/apk-policy.8 \
-	$(obj)/apk-stats.8 \
-	$(obj)/apk-update.8 \
-	$(obj)/apk-upgrade.8 \
-	$(obj)/apk-verify.8 \
-	$(obj)/apk-version.8
-
-docs: $(MAN_5) $(MAN_8)
-targets += docs
-
-install.5: $(MAN_5)
-	$(INSTALLDIR) $(DESTDIR)$(MANDIR)/man5
-	for page in $^; do $(INSTALL) $$page $(DESTDIR)$(MANDIR)/man5/; done
-
-install.8: $(MAN_8)
-	$(INSTALLDIR) $(DESTDIR)$(MANDIR)/man8
-	for page in $^; do $(INSTALL) $$page $(DESTDIR)$(MANDIR)/man8/; done
-
-install: install.5 install.8
+install:
+	for page in $(scdocs-y); do \
+		section=$${page#*.}; \
+		$(INSTALLDIR) $(DESTDIR)$(MANDIR)/man$$section; \
+		$(INSTALL) $(obj)/$$page $(DESTDIR)$(MANDIR)/man$$section/; \
+	done