readded udpated scripts directory

scripts/cgrep

@@ -0,0 +1,74 @@
+#!/bin/bash
+
+# cgrep--grep with context display and highlighted pattern matches
+
+# Usage Example:
+# cgrep -c 1 Introduction bash_copy.txt
+
+context=0
+esc="^["
+boldon="${esc}[1m" boldoff="${esc}[22m"
+sedscript="/tmp/cgrep.sed.$$"
+tempout="/tmp/cgrep.$$"
+
+function showMatches
+{
+    matches=0
+
+    echo "s/$pattern/${boldon}$pattern${boldoff}/g" > $sedscript
+
+    for lineno in $(grep -n "$pattern" $1 | cut -d: -f1)
+    do
+        if [ $context -gt 0 ] ; then
+            prev="$(( $lineno - $context ))"
+
+            if [ $prev -lt 1 ] ; then
+                # This results in "invalid usage of line address 0."
+                prev="1"
+            fi
+            next="$(( $lineno + $context ))"
+
+            if [ $matches -gt 0 ] ; then
+                echo "${prev}i\\" >> $sedscript
+                echo "----" >> $sedscript
+            fi
+            echo "${prev},${next}p" >> $sedscript
+        else
+            echo "${lineno}p" >> $sedscript
+        fi
+        matches="$(( $matches + 1 ))"
+    done
+
+    if [ $matches -gt 0 ] ; then
+        sed -n -f $sedscript $1 | uniq | more
+    fi
+}
+
+trap "$(which rm) -f $tempout $sedscript" EXIT
+
+if [ -z "$1" ] ; then
+    echo "Usage: $0 [-c X] pattern {filename}" >&22m
+    exit 0
+fi
+
+if [ "$1" = "-c" ] ; then
+    context="$2"
+    shift; shift
+elif [ "$(echo $1|cut -c1-2)" = "-c" ] ; then
+    context="$(echo $1 | cut -c3-)"
+    shift
+fi
+
+pattern="$1"; shift
+
+if [ $# -gt 0 ] ; then
+    for filename ; do
+        echo "----- $filename -----"
+        showMatches $filename
+    done
+else
+    cat - > $tempout    # Save stream to a temp file.
+    showMatches $tempout
+fi
+
+exit 0