gnu: All snippets report errors using exceptions, else return #t.

* gnu/packages/admin.scm, gnu/packages/algebra.scm, gnu/packages/audio.scm,
gnu/packages/backup.scm, gnu/packages/base.scm,
gnu/packages/bioinformatics.scm, gnu/packages/cdrom.scm,
gnu/packages/chez.scm, gnu/packages/code.scm, gnu/packages/compression.scm,
gnu/packages/cross-base.scm, gnu/packages/crypto.scm, gnu/packages/cups.scm,
gnu/packages/databases.scm, gnu/packages/dns.scm, gnu/packages/emacs.scm,
gnu/packages/emulators.scm, gnu/packages/engineering.scm,
gnu/packages/enlightenment.scm, gnu/packages/fpga.scm,
gnu/packages/freedesktop.scm, gnu/packages/ftp.scm, gnu/packages/games.scm,
gnu/packages/gcc.scm, gnu/packages/geo.scm, gnu/packages/ghostscript.scm,
gnu/packages/gl.scm, gnu/packages/glib.scm, gnu/packages/gnome.scm,
gnu/packages/gnuzilla.scm, gnu/packages/graphics.scm, gnu/packages/gtk.scm,
gnu/packages/guile.scm, gnu/packages/irc.scm, gnu/packages/java.scm,
gnu/packages/kerberos.scm, gnu/packages/linux.scm, gnu/packages/lisp.scm,
gnu/packages/lxde.scm, gnu/packages/machine-learning.scm,
gnu/packages/mail.scm, gnu/packages/maths.scm, gnu/packages/messaging.scm,
gnu/packages/monitoring.scm, gnu/packages/mp3.scm, gnu/packages/music.scm,
gnu/packages/netpbm.scm, gnu/packages/networking.scm, gnu/packages/node.scm,
gnu/packages/nvi.scm, gnu/packages/ocaml.scm, gnu/packages/pdf.scm,
gnu/packages/perl.scm, gnu/packages/php.scm, gnu/packages/plotutils.scm,
gnu/packages/pretty-print.scm, gnu/packages/profiling.scm,
gnu/packages/pulseaudio.scm, gnu/packages/python-crypto.scm,
gnu/packages/python.scm, gnu/packages/qt.scm, gnu/packages/robotics.scm,
gnu/packages/sawfish.scm, gnu/packages/scanner.scm, gnu/packages/scheme.scm,
gnu/packages/scribus.scm, gnu/packages/sdl.scm,
gnu/packages/serialization.scm, gnu/packages/shells.scm,
gnu/packages/slang.scm, gnu/packages/smalltalk.scm, gnu/packages/ssh.scm,
gnu/packages/sync.scm, gnu/packages/syncthing.scm, gnu/packages/tbb.scm,
gnu/packages/terminals.scm, gnu/packages/texinfo.scm,
gnu/packages/text-editors.scm, gnu/packages/textutils.scm,
gnu/packages/tls.scm, gnu/packages/unrtf.scm,
gnu/packages/version-control.scm, gnu/packages/video.scm,
gnu/packages/vpn.scm, gnu/packages/web.scm, gnu/packages/wm.scm,
gnu/packages/wxwidgets.scm, gnu/packages/xdisorg.scm, gnu/packages/xorg.scm:
In all snippets, report errors using exceptions, or else return #t.

1 files changed, 13 insertions, 6 deletions

diff --git a/gnu/packages/audio.scm b/gnu/packages/audio.scm
index eb7b79ee7a..82fadfe175 100644
--- a/gnu/packages/audio.scm
+++ b/gnu/packages/audio.scm
@@ -209,7 +209,8 @@ streams from live audio.")
                     "libs/ardour/revision.cc"
                   (lambda (port)
                     (format port ,(string-append "#include \"ardour/revision.h\"
-namespace ARDOUR { const char* revision = \"" version "\" ; }")))))
+namespace ARDOUR { const char* revision = \"" version "\" ; }"))
+                    #t)))
               (sha256
                (base32
                 "0mla5lm51ryikc2rrk53max2m7a5ds6i1ai921l2h95wrha45nkr"))
@@ -510,7 +511,9 @@ tools (analyzer, mono/stereo tools, crossovers).")
               (modules '((guix build utils)))
               (snippet
                ;; remove prebuilt binaries
-               '(delete-file-recursively "linux_32bit"))))
+               '(begin
+                  (delete-file-recursively "linux_32bit")
+                  #t))))
     (build-system gnu-build-system)
     (arguments
      `(#:make-flags (list (string-append "PREFIX=" (assoc-ref %outputs "out"))
@@ -2745,8 +2748,10 @@ result.")
                     version ".tar.bz2"))
               (snippet
                ;; Don't optimize for a specific processor architecture.
-               '(substitute* "libs/Makefile"
-                  (("^CXXFLAGS \\+= -march=native") "")))
+               '(begin
+                  (substitute* "libs/Makefile"
+                    (("^CXXFLAGS \\+= -march=native") ""))
+                  #t))
               (modules '((guix build utils)))
               (sha256
                (base32
@@ -2790,8 +2795,10 @@ engine.")
                     version ".tar.bz2"))
               (snippet
                ;; Don't optimize for a specific processor architecture.
-               '(substitute* '("apps/Makefile" "libs/Makefile")
-                  (("^CXXFLAGS \\+= -march=native") "")))
+               '(begin
+                  (substitute* '("apps/Makefile" "libs/Makefile")
+                    (("^CXXFLAGS \\+= -march=native") ""))
+                  #t))
               (modules '((guix build utils)))
               (sha256
                (base32