From 4cb0b580b2679f40ccc31f42a360c28c14a1e59d Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Thu, 22 Nov 2018 22:33:59 +1300
Subject: Apply some logic to choose a GUI browser

I'll want to use Dillo if I'm on a machine with limited memory, but the
balance tips in favour of Firefox if I have RAM to spare.
---
 X/xinitrc.d/browser.sh | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

(limited to 'X')

diff --git a/X/xinitrc.d/browser.sh b/X/xinitrc.d/browser.sh
index cdb9b8c0..0153fba9 100644
--- a/X/xinitrc.d/browser.sh
+++ b/X/xinitrc.d/browser.sh
@@ -1,4 +1,24 @@
-# Browser within X is Firefox
-command -v firefox >/dev/null 2>&1 || return
-BROWSER=firefox
+# Choose a GUI browser with some rough heuristics
+
+# If Firefox is available, start by assuming that
+if command -v firefox >/dev/null 2>&1 ; then
+    BROWSER=firefox
+fi
+
+# Consider a switch to Dillo...
+if (
+    # No output, please
+    exec >/dev/null 2>&1
+    # Don't switch if it's not there
+    command -v dillo || exit
+    # Switch if Firefox isn't there
+    command -v firefox || exit 0
+    # Switch if procfs says we have less than 2GB of RAM
+    awk '$1=="MemTotal:"&&$2<2^20{m++}END{exit!m}' < /proc/meminfo
+) ; then
+    BROWSER=dillo
+fi
+
+# Export our choice of browser, if it isn't empty
+[ -n "$BROWSER" ] || return
 export BROWSER
-- 
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