Finer-grained repository access permissions (issue 36)

Implemented discrete repository access permissions to replace the
really primitive course-grained permissions used to this point.  This
implementation allows for finer-grained access control, but still
falls short of integrated, branch-based permissions sought by some.

Access permissions follow the conventions established by Gitosis and
Gitolite so they should feel immediately comfortable to experienced
users.  This permissions infrastructure is complete and works exactly as
expected.  Unfortunately, there is no ui in this commit to change
permissions, that will be forthcoming.  In the meantime, Gitblit
hot-reloads users.conf so the permissions can be manipulated at runtime
with a text editor.

The following per-repository permissions are now supported:
- V (view in web ui, RSS feeds, download zip)
- R (clone)
- RW (clone and push)
- RWC (clone and push with ref creation)
- RWD (clone and push with ref creation, deletion)
- RW+ (clone and push with ref creation, deletion, rewind)

And a users.conf entry looks something like this:

	[user "hannibal"]
		password = bossman
		repository = RWD:topsecret.git

1 files changed, 2 insertions, 2 deletions

diff --git a/src/com/gitblit/wicket/pages/RepositoryPage.java b/src/com/gitblit/wicket/pages/RepositoryPage.java
index 2afc2c4d..9048eba3 100644
--- a/src/com/gitblit/wicket/pages/RepositoryPage.java
+++ b/src/com/gitblit/wicket/pages/RepositoryPage.java
@@ -209,7 +209,7 @@ public abstract class RepositoryPage extends BasePage {
 			if (origin == null) {

 				// no origin repository

 				add(new Label("originRepository").setVisible(false));

-			} else if (!user.canViewRepository(origin)) {

+			} else if (!user.canView(origin)) {

 				// show origin repository without link

 				Fragment forkFrag = new Fragment("originRepository", "originFragment", this);

 				forkFrag.add(new Label("originRepository", StringUtils.stripDotGit(model.originRepository)));

@@ -242,7 +242,7 @@ public abstract class RepositoryPage extends BasePage {
 		} else {

 			String fork = GitBlit.self().getFork(user.username, model.name);

 			boolean hasFork = fork != null;

-			boolean canFork = user.canForkRepository(model);

+			boolean canFork = user.canFork(model);

 

 			if (hasFork || !canFork) {

 				// user not allowed to fork or fork already exists or repo forbids forking