Add 'guix describe'.

* guix/scripts/describe.scm: New file.
* Makefile.am (MODULES): Add it.
(SH_TESTS): Add tests/guix-describe.sh.
* po/guix/POTFILES.in: Add it.
* guix/scripts/pull.scm (display-profile-content): Export.
* guix/describe.scm (current-profile, current-profile-entries): Export.
* tests/guix-describe.sh: New file.
* doc/guix.texi (Features): Mention 'guix pull' and provenance tracking.
(Invoking guix pull): Link to 'guix describe'.
(Channels): Likewise.
(Invoking guix describe): New node.

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/guix-describe.sh b/tests/guix-describe.sh
new file mode 100644
index 0000000000..af523f0a0b
--- /dev/null
+++ b/tests/guix-describe.sh
@@ -0,0 +1,47 @@
+# GNU Guix --- Functional package management for GNU
+# Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
+#
+# This file is part of GNU Guix.
+#
+# GNU Guix is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or (at
+# your option) any later version.
+#
+# GNU Guix is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+#
+# Test 'guix describe'.
+#
+
+guix describe --version
+
+tmpfile="t-guix-describe-$$"
+trap "rm -f $tmpfile" EXIT
+rm -f "$tmpfile"
+
+if [ -d "$abs_top_srcdir/.git" ]
+then
+    # Since we're in a Git checkout, we can at least check that these things
+    # work.
+    guix describe | grep -i "checkout"
+    if git --version > /dev/null 2>&1
+    then
+	result="`guix describe | grep commit: | cut -d : -f 2-`"
+	commit="`git log | head -1 | cut -c 7-`"
+	test "x$result" = "x$commit"
+    fi
+    guix describe -f channels
+    case "`guix describe -f channels | grep url`" in
+	*"(url \"$abs_top_srcdir\")") true;;
+	*) false;;
+    esac
+else
+    exit 77
+fi