From e07c8eb599c9fc0f77c7a6f0643a786b751796b4 Mon Sep 17 00:00:00 2001
From: linear <dev@linear.network>
Date: Sun, 5 Sep 2021 01:03:36 -0700
Subject: doc/gen-man.sh: head and tail +/- syntax is not portable

the + and - syntax on head and tail are only present, as far as i know,
in GNU coreutils, and are not present on any other UNIX or BSD systems.

this patch replaces those with a more portable processing chain, which
is tested to work on GNU coreutils, NetBSD, macOS, and busybox.
---
 doc/gen-man.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/doc/gen-man.sh b/doc/gen-man.sh
index 5b8ad18..8391c73 100755
--- a/doc/gen-man.sh
+++ b/doc/gen-man.sh
@@ -54,8 +54,7 @@ gem_in=$(
     cat "$gemtext_in" |
 
     # Strip a few lines from beginning/end of file.
-    tail -n +9 |
-    head -n -9 |
+    nl | awk 'FNR > 9' | sort -nr | awk 'FNR > 9' | sort -n | cut -f 2- |
 
     # First expression replaces all [Text like this] with bold text.
     # Second expression replaces text like *This* or _this_ with italic text.
-- 
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