Use kak-ansi to render man pages

CHANGELOG.asc

@@ -1,7 +1,14 @@
 CHANGELOG
 =========
 
-== https://github.com/eraserhd/kak-ansi/compare/v0.2.6...HEAD[Unreleased]
+== https://github.com/eraserhd/kak-ansi/compare/v0.2.7...HEAD[Unreleased]
+
+== https://github.com/eraserhd/kak-ansi/compare/v0.2.6...v0.2.7[v0.2.7]
+
+=== Added
+
+* Override Kakoune's default `man-impl` to use `ansi-enable`.  The `man`
+  command brought in by Nix on Mac OS has started using ANSI escapes.
 
 == https://github.com/eraserhd/kak-ansi/compare/v0.2.5...v0.2.6[v0.2.6]
 

derivation.nix

@@ -2,7 +2,7 @@
 
 stdenv.mkDerivation rec {
   name = "kak-ansi";
-  version = "0.2.6";
+  version = "0.2.7";
 
   src = ./.;
 

rc/ansi.kak

@@ -76,3 +76,32 @@ define-command \
     }
 
 hook -group ansi global BufCreate '\*stdin(?:-\d+)?\*' ansi-enable
+
+define-command -override -hidden -params ..3 man-impl %{ evaluate-commands %sh{
+    buffer_name="$1"
+    if [ -z "${buffer_name}" ]; then
+        exit
+    fi
+    shift
+    manout=$(mktemp "${TMPDIR:-/tmp}"/kak-man.XXXXXX)
+    manerr=$(mktemp "${TMPDIR:-/tmp}"/kak-man.XXXXXX)
+    env MANWIDTH=${kak_window_range##* } man "$@" > "$manout" 2> "$manerr"
+    retval=$?
+
+    if [ "${retval}" -eq 0 ]; then
+        printf %s\\n "
+                edit -scratch %{*$buffer_name ${*}*}
+                execute-keys '%|cat<space>${manout}<ret>gk'
+                ansi-enable
+                nop %sh{ rm ${manout} ${manerr} }
+                set-option buffer filetype man
+                set-option window manpage $buffer_name $*
+        "
+    else
+        printf '
+            fail %%{%s}
+            nop %%sh{ rm "%s" "%s" }
+        ' "$(cat "$manerr")" "${manout}" "${manerr}"
+    fi
+} }
+