build: Ensure man pages are not rebuilt by users.

* doc.am (doc/guix.1): Remove dependency on 'scripts/guix' since every user
  would end up rebuilding 'guix.1'.  Add dependency on guix/scripts/*.scm.
  (doc/guix-daemon.1): For the same reason, depend on 'guix-daemon.cc' instead
  of 'guix-daemon'.
  (doc/guix-$(1).1): Similarly, remove dependency on 'scripts/guix' and depend
  on 'guix/scripts/$(1).scm' instead of the .go file.

1 files changed, 5 insertions, 3 deletions

diff --git a/doc.am b/doc.am
index 3de08e21770..02b80ec7b5b 100644
--- a/doc.am
+++ b/doc.am
@@ -80,17 +80,19 @@ dvi-local: ps-local
 
 # Manual pages.
 
-doc/guix.1: scripts/guix
+doc/guix.1: $(SUBCOMMANDS:%=guix/scripts/%.scm)
         -LANGUAGE= $(top_builddir)/pre-inst-env \
           $(HELP2MAN) --output="$@" guix
 
-doc/guix-daemon.1: guix-daemon
+# Note: Do not depend on 'guix-daemon' since that would trigger a rebuild even
+# for people building from a tarball.
+doc/guix-daemon.1: nix/nix-daemon/guix-daemon.cc
         -LANGUAGE= $(top_builddir)/pre-inst-env \
           $(HELP2MAN) --output="$@" guix-daemon
 
 define subcommand-manual-target
 
-doc/guix-$(1).1: scripts/guix guix/scripts/$(1).go
+doc/guix-$(1).1: guix/scripts/$(1).scm
         -LANGUAGE= $(top_builddir)/pre-inst-env         \
           $(HELP2MAN) --output="$$@" "guix $(1)"