cli: Install bash autocomplete during 'make install'

Makefile

@@ -388,6 +388,10 @@ distclean: clean
 install-cli: cli
 	$(INSTALL) -d $(DESTDIR)$(bindir)
 	$(INSTALL) x264$(EXE) $(DESTDIR)$(bindir)
+ifneq ($(BASHCOMPLETIONSDIR),)
+	$(INSTALL) -d $(DESTDIR)$(BASHCOMPLETIONSDIR)
+	$(INSTALL) -m 644 -T $(SRCPATH)/tools/bash-autocomplete.sh $(DESTDIR)$(BASHCOMPLETIONSDIR)/x264
+endif
 
 install-lib-dev:
 	$(INSTALL) -d $(DESTDIR)$(includedir) $(DESTDIR)$(libdir)/pkgconfig
@@ -418,6 +422,9 @@ ifneq ($(IMPLIBNAME),)
 else ifneq ($(SONAME),)
 	rm -f $(DESTDIR)$(libdir)/$(SONAME) $(DESTDIR)$(libdir)/libx264.$(SOSUFFIX)
 endif
+ifneq ($(BASHCOMPLETIONSDIR),)
+	rm -f $(DESTDIR)$(BASHCOMPLETIONSDIR)/x264
+endif
 
 etags TAGS:
 	etags $(SRCS) $(SRCS_X) $(SRCS_8)

configure

@@ -1528,6 +1528,9 @@ fi
 if [ "$cli" = "yes" ]; then
     echo 'default: cli' >> config.mak
     echo 'install: install-cli' >> config.mak
+    if pkg_check bash-completion ; then
+        echo "BASHCOMPLETIONSDIR=$($PKGCONFIG --variable=completionsdir bash-completion)" >> config.mak
+    fi
 fi
 
 if [ "$shared" = "yes" ]; then