qcd: Add "change" command

Option to change the path referenced by a given shortcut. Uses `sed` to
make the replacement and write out the updated database file. Using the
`-E` flag on `sed` so that the `+` regex operator works. The `-E` flag
works on OS X, but on Linux with GNU sed, it would be the `-r` flag
instead.

1 files changed, 7 insertions, 0 deletions

diff --git a/qcd b/qcd
index b069963..efb0f59 100755
--- a/qcd
+++ b/qcd
@@ -56,6 +56,13 @@ function qcd () {
 			fi
 			;;
 		-c)
+			local shortcut=$2
+			local path=$3
+
+			if shortcut_exists $shortcut; then
+				path=$(absolute_path $path)
+				sed -i.bak -E "s/^${shortcut}	.+$/${shortcut}	${path//\//\/}/" $QCD_DATABASE_FILE
+			fi
 			;;
 		-r)
 			;;