Replace shebang paths with the build-time $(PERL).

On non-Debian systems, /usr/bin/perl might not be the best available
Perl interpreter. Use whichever perl was used to run Makefile.PL,
unless it was "/usr/bin/perl", in which case there's nothing to do.

diff --git a/Makefile.PL b/Makefile.PL
index 13ed103c7a077702a6ced45533e00ed1f121dc5f..61fe336b82046a7e575451d40614e5cab79930a4 100755 (executable)
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -27,6 +27,7 @@ extramodules=$(shell if [ "$$PROFILE" = 1 ]; then printf -- "-d:NYTProf"; fi)
 outprogs=ikiwiki.out ikiwiki-transition.out ikiwiki-calendar.out
 scripts=ikiwiki-update-wikilist ikiwiki-makerepo
 sysconfdir_scripts=ikiwiki-mass-rebuild ikiwiki-update-wikilist
+shebang_scripts=$(shell $(FIND) . -type f \( -name '*.in' -o -name '*.cgi' -o -name '*.pm' -o -name '*.pm.example' -o -name '*.t' -o -name '*.setup' -o -name 'ikiwiki-mass-rebuild' -o -name 'ikiwiki-update-wikilist' -o -name 'gitremotes' -o -name 'mdwn2man' -o -name 'pm_filter' -o -name 'po2wiki' -o -name 'externaldemo' \))
 
 PROBABLE_INST_LIB=$(shell \\
        if [ "$(INSTALLDIRS)" = "perl" ]; then \\
@@ -45,7 +46,7 @@ PROBABLE_INST_LIB=$(shell \\
 ikiwiki.setup:
        HOME=/home/me $(PERL) -Iblib/lib $(extramodules) $(tflag) ikiwiki.in -dumpsetup ikiwiki.setup
 
-extra_build: $(outprogs) ikiwiki.setup docwiki sysconfdir
+extra_build: perl_shebangs $(outprogs) ikiwiki.setup docwiki sysconfdir
        ./mdwn2man ikiwiki 1 doc/usage.mdwn > ikiwiki.man
        ./mdwn2man ikiwiki-mass-rebuild 8 doc/ikiwiki-mass-rebuild.mdwn > ikiwiki-mass-rebuild.man
        ./mdwn2man ikiwiki-makerepo 1 doc/ikiwiki-makerepo.mdwn > ikiwiki-makerepo.man
@@ -59,10 +60,28 @@ extra_build: $(outprogs) ikiwiki.setup docwiki sysconfdir
 docwiki:
        $(PERL) -Iblib/lib $(extramodules) $(tflag) ikiwiki.in -setup docwiki.setup -refresh
 
+perl_shebangs:
+ifneq "$(PERL)" "/usr/bin/perl"
+       for file in $(shebang_scripts); do \
+               $(SED) -e "1s|^#!/usr/bin/perl|#!$(PERL)|" < $$file > "$$file.new"; \
+               [ -x $$file ] && chmod +x "$$file.new"; \
+               mv -f "$$file.new" $$file; \
+       done
+endif
+
+perl_shebangs_clean:
+ifneq "$(PERL)" "/usr/bin/perl"
+       for file in $(shebang_scripts); do \
+               $(SED) -e "1s|^#!$(PERL)|#!/usr/bin/perl|" < $$file > "$$file.new"; \
+               [ -x $$file ] && chmod +x "$$file.new"; \
+               mv -f "$$file.new" $$file; \
+       done
+endif
+
 sysconfdir:
        $(PERL) -pi -e "s|\"/etc/ikiwiki|\"$(SYSCONFDIR)|g" $(sysconfdir_scripts)
        
-extra_clean:
+extra_clean: perl_shebangs_clean
        $(PERL) -Iblib/lib $(extramodules) $(tflag) ikiwiki.in -setup docwiki.setup -clean
        rm -f *.man $(outprogs) ikiwiki.setup plugins/*.pyc
        $(MAKE) -C po clean