From d179693d1d4a571d6b5ec3279d09390d6115b39c Mon Sep 17 00:00:00 2001
From: sharkdp <davidpeter@web.de>
Date: Mon, 23 Jul 2018 22:49:25 +0200
Subject: [PATCH] Use BAT_PAGER and PAGER environment variables, closes #158

---
 src/output.rs | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/src/output.rs b/src/output.rs
index 4e07a18a..bd565033 100644
--- a/src/output.rs
+++ b/src/output.rs
@@ -1,5 +1,6 @@
 use app::PagingMode;
 use errors::*;
+use std::env;
 use std::io::{self, Write};
 use std::process::{Child, Command, Stdio};
 
@@ -20,13 +21,24 @@ impl OutputType {
 
     /// Try to launch the pager. Fall back to stdout in case of errors.
     fn try_pager(quit_if_one_screen: bool) -> Self {
-        let mut args = vec!["--RAW-CONTROL-CHARS", "--no-init"];
-        if quit_if_one_screen {
-            args.push("--quit-if-one-screen");
-        }
-        Command::new("less")
-            .args(&args)
-            .env("LESSCHARSET", "UTF-8")
+        let pager = env::var("BAT_PAGER")
+            .or_else(|_| env::var("PAGER"))
+            .unwrap_or(String::from("less"));
+
+        let mut process = if pager == "less" {
+            let mut args = vec!["--RAW-CONTROL-CHARS", "--no-init"];
+            if quit_if_one_screen {
+                args.push("--quit-if-one-screen");
+            }
+
+            let mut p = Command::new("less");
+            p.args(&args).env("LESSCHARSET", "UTF-8");
+            p
+        } else {
+            Command::new(pager)
+        };
+
+        process
             .stdin(Stdio::piped())
             .spawn()
             .map(OutputType::Pager)