From d20cb23998c672fea3ef344d836102a781517c80 Mon Sep 17 00:00:00 2001
From: Tom Ryder <tom@sanctum.geek.nz>
Date: Sat, 30 May 2015 23:56:54 +1200
Subject: Overhaul grep(1) and ls(1) options and wrappers

---
 sh/profile.d/grep.sh | 38 ++++++++++++++++++++++++++++++++++++++
 sh/profile.d/ls.sh   | 26 ++++++++++++++++++--------
 2 files changed, 56 insertions(+), 8 deletions(-)
 create mode 100644 sh/profile.d/grep.sh

(limited to 'sh')

diff --git a/sh/profile.d/grep.sh b/sh/profile.d/grep.sh
new file mode 100644
index 00000000..e83d6268
--- /dev/null
+++ b/sh/profile.d/grep.sh
@@ -0,0 +1,38 @@
+# Store grep(1)'s --help output in a variable
+grep_help=$(grep --help 2>/dev/null)
+
+# Define and store appropriate colors for grep(1) if applicable
+case $grep_help in
+    *--color*)
+        GREP_COLORS='ms=01;31:mc=01;31:sl=:cx=:fn=35:ln=32:bn=32:se=36'
+        export GREP_COLORS
+        ;;
+esac
+
+# Use GREP_OPTIONS to add some useful --exclude and --exclude-dir options to
+# grep(1) calls if applicable
+case $grep_help in
+    *--exclude*)
+        for exclude in .gitignore .gitmodules ; do
+            GREP_OPTIONS=${GREP_OPTIONS:+$GREP_OPTIONS }'--exclude='$exclude
+        done
+        unset -v exclude
+        ;;
+esac
+case $grep_help in
+    *--exclude-dir*)
+        for exclude_dir in .cvs .git .hg .svn ; do
+            GREP_OPTIONS=${GREP_OPTIONS:+$GREP_OPTIONS }'--exclude-dir='$exclude_dir
+        done
+        unset -v exclude_dir
+        ;;
+esac
+
+# We're done parsing grep(1)'s --help output now
+unset -v grep_help
+
+# Export the grep(1) options if we decided on any
+if [ -n "$GREP_OPTIONS" ] ; then
+    export GREP_OPTIONS
+fi
+
diff --git a/sh/profile.d/ls.sh b/sh/profile.d/ls.sh
index 25fe4777..3ecaa5fd 100644
--- a/sh/profile.d/ls.sh
+++ b/sh/profile.d/ls.sh
@@ -1,9 +1,19 @@
-# Define and store appropriate colors for ls
-if command -v dircolors >/dev/null 2>&1 ; then
-    if [ -r "$HOME"/.dircolors ] ; then
-        eval "$(dircolors --sh -- "$HOME"/.dircolors)"
-    else
-        eval "$(dircolors --sh)"
-    fi
-fi
+# Store ls(1)'s --help output in a variable
+lshelp=$(ls --help 2>/dev/null)
+
+# Define and store appropriate colors for ls(1) if applicable
+case $lshelp in
+    *--color*)
+        if command -v dircolors >/dev/null 2>&1 ; then
+            if [ -r "$HOME"/.dircolors ] ; then
+                eval "$(dircolors --sh -- "$HOME"/.dircolors)"
+            else
+                eval "$(dircolors --sh)"
+            fi
+        fi
+        ;;
+esac
+
+# We're done parsing ls(1)'s --help output now
+unset -v lshelp
 
-- 
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