libcmd/markdown: handle allocation errors in lowdown_term_rndr

We upgrade to lowdown 0.8.0 [1] which contains a fix/improvement to a
behavior mentioned in this issue thread [2] where a big part of
lowdown's API would just call exit(1) on allocation errors since that
is a satisfying behavior for the lowdown binary.

Now lowdown_term_rndr returns 0 if an allocation error occurred which we
check for in libcmd/markdown.cc.

Also the extern "C" { } wrapper around lowdown.h has been removed as it
is not necessary.

[1]: https://github.com/kristapsdz/lowdown/blob/6ca7c855a063d1c77ae0b89405047cc3913a74d8/versions.xml#L987-L1006
[2]: https://github.com/kristapsdz/lowdown/issues/45#issuecomment-756681153

1 files changed, 4 insertions, 4 deletions

diff --git a/flake.nix b/flake.nix
index d94da9dae..8c60934e6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -198,12 +198,12 @@
 
         };
 
-        lowdown = with final; stdenv.mkDerivation {
-          name = "lowdown-0.7.9";
+        lowdown = with final; stdenv.mkDerivation rec {
+          name = "lowdown-0.8.0";
 
           src = fetchurl {
-            url = https://kristaps.bsd.lv/lowdown/snapshots/lowdown-0.7.9.tar.gz;
-            hash = "sha512-7GQrKFICyTI5T4SinATfohiCq9TC0OgN8NmVfG3B3BZJM9J00DT8llAco8kNykLIKtl/AXuS4X8fETiCFEWEUQ==";
+            url = "https://kristaps.bsd.lv/lowdown/snapshots/${name}.tar.gz";
+            hash = "sha512-U9WeGoInT9vrawwa57t6u9dEdRge4/P+0wLxmQyOL9nhzOEUU2FRz2Be9H0dCjYE7p2v3vCXIYk40M+jjULATw==";
           };
 
           #src = lowdown-src;