import: cabal: Allow curly bracket before else statement.

* guix/import/cabal.scm (is-else): Turn into procedure.
(lex-line): Move IS-ELSE…
(lex-word): …here.
* tests/hackage.scm (test-cabal-elif-brackets): Extend testcase.

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/hackage.scm b/tests/hackage.scm
index 4ce48b6baf3..98f9c34fd28 100644
--- a/tests/hackage.scm
+++ b/tests/hackage.scm
@@ -398,7 +398,10 @@ library
   elif os(guix) { Build-depends: ghc-c }
   elif os(third) {
     Build-depends: ghc-d }
-  else
+  elif os(fourth)
+  {
+    Build-depends: ghc-d
+  } else
     Build-depends: ghc-e
 ")