From aa35cb52c47ef143ed2564dbc9f15d625fef4c7c Mon Sep 17 00:00:00 2001
From: David Peter <mail@david-peter.de>
Date: Sun, 29 May 2022 22:51:10 +0200
Subject: [PATCH] Add exemplary hexyl plugin

---
 plugins/hexyl.lua | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 plugins/hexyl.lua

diff --git a/plugins/hexyl.lua b/plugins/hexyl.lua
new file mode 100644
index 00000000..b98ad285
--- /dev/null
+++ b/plugins/hexyl.lua
@@ -0,0 +1,21 @@
+-- Note: this plugin depends on the existence of 'inspect' [1] and 'hexyl' [2]
+--
+-- [1] https://github.com/sharkdp/content_inspector
+-- [2] https://github.com/sharkdp/hexyl
+
+function is_binary(path)
+    local stream = assert(io.popen("inspect '" .. path .. "'"))
+    local output = stream:read('*all')
+    stream:close()
+    return string.find(output, ": binary\n")
+end
+
+function preprocess(path)
+    if is_binary(path) then
+        tmpfile = os.tmpname()
+        os.execute("hexyl --length 1024 --no-position --border=none --no-squeezing '" .. path .. "' > '" .. tmpfile .. "'")
+        return tmpfile
+    else
+        return path
+    end
+end