maint: Use a pretty version string in ISO and VM images.

* gnu/system/examples/vm-image.tmpl: Use the 'GUIX_DISPLAYED_VERSION'
environment variable in 'label'.
* gnu/system/install.scm (%installation-os): Likewise.
* Makefile.am (release): Set 'GUIX_DISPLAYED_VERSION'.

1 files changed, 4 insertions, 2 deletions

diff --git a/Makefile.am b/Makefile.am
index ac6df11c850..8df8222573e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -984,13 +984,14 @@ release: dist-with-updated-version all
               -v1 --no-grafts --fallback
 # Generate the ISO installation images.
         for system in $(GUIX_SYSTEM_SUPPORTED_SYSTEMS) ; do                             \
+          GUIX_DISPLAYED_VERSION="`git describe --match=v* | sed -'es/^v//v'`" ;        \
           image=`$(top_builddir)/pre-inst-env                                           \
-            guix system image -t iso9660                                                \
+            guix system image -t iso9660                                                \
             --label="GUIX_$${system}_$(VERSION)"                                        \
             --system=$$system --fallback                                                \
             gnu/system/install.scm` ;                                                   \
           if [ ! -f "$$image" ] ; then                                                  \
-            echo "failed to produce Guix installation image for $$system" >&2 ; \
+            echo "failed to produce Guix installation image for $$system" >&2 ;         \
             exit 1 ;                                                                    \
           fi ;                                                                          \
           cp "$$image" "$(releasedir)/$(GUIX_SYSTEM_IMAGE_BASE).$$system.iso.tmp" ;     \
@@ -999,6 +1000,7 @@ release: dist-with-updated-version all
         done
 # Generate the VM images.
         for system in $(GUIX_SYSTEM_VM_SYSTEMS) ; do                                    \
+          GUIX_DISPLAYED_VERSION="`git describe --match=v* | sed -'es/^v//v'`" ;        \
           image=`$(top_builddir)/pre-inst-env                                           \
             guix system image -t qcow2 $(GUIX_SYSTEM_VM_IMAGE_FLAGS)                    \
             --save-provenance                                                           \