Bake version string into binary, add "--version" switch

Example:

	./gocryptfs -version
	gocryptfs v0.2-20-gabcef9e-dirty; on-disk format 1

Note that you MUST compile using "./build.bash" for this to work.

1 files changed, 3 insertions, 1 deletions

diff --git a/build.bash b/build.bash
index 8d985d0..c4b7121 100755
--- a/build.bash
+++ b/build.bash
@@ -2,4 +2,6 @@
 
 set -eu
 
-go build
+GITVERSION=$(git describe --tags --dirty)
+
+go build -ldflags="-X main.GitVersion=$GITVERSION" && ./gocryptfs -version