From 80076cd9ddfc5dae907ac10f3010925f181b028e Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Sun, 21 Aug 2016 20:44:39 +1200
Subject: Restructure ed() to test,cache features on login

---
 sh/profile.d/ed.sh | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 sh/profile.d/ed.sh

(limited to 'sh/profile.d')

diff --git a/sh/profile.d/ed.sh b/sh/profile.d/ed.sh
new file mode 100644
index 00000000..abbd75c5
--- /dev/null
+++ b/sh/profile.d/ed.sh
@@ -0,0 +1,22 @@
+# Test that we have metadata about what options this system's ed(1) supports,
+# and try to create it if not
+(
+    # Create a directory to hold metadata about ed
+    ecd=$HOME/.cache/ed
+    if ! [ -d "$ecd" ] ; then
+        mkdir -p -- "$ecd" || exit
+    fi
+
+    # Write ed(1)'s --help output to a file, even if it's empty
+    if ! [ -f "$ecd"/help ] ; then
+        ed --help </dev/null >"$ecd"/help 2>/dev/null || exit
+
+        # Iterate through some useful options and create files to show they're
+        # available
+        set -- verbose
+        for opt ; do
+            grep -q -- --"$opt" "$ecd"/help || continue
+            touch -- "$ecd"/"$opt" || exit
+        done
+    fi
+)
-- 
cgit v1.2.3