Update CONTRIBUTING and PROJECTS

This updates CONTRIBUTING to reflect the changes to use the
master branch and make explicit recommendations about updating
CHANGELOG.md and providing test coverage.  Also, this includes
some old updates to PROJECTS.md that I wrote to expand the list
of projects, pulling in things from old feature requests.

1 files changed, 35 insertions, 9 deletions

diff --git a/PROJECTS.md b/PROJECTS.md
index d17214471..5164d95b6 100644
--- a/PROJECTS.md
+++ b/PROJECTS.md
@@ -10,10 +10,11 @@ ideas that no one is actively working on.
 
 ## Before You Start
 
-Please start by reading the README.md, CONTRIBUTING.md, and CONVENTIONS.md
-files before diving into one of these projects.  Those will explain our
-work flow and coding conventions to help ensure that your work will be
-easily integrated into libgit2.
+Please start by reading the [README.md](README.md),
+[CONTRIBUTING.md](CONTRIBUTING.md), and [CONVENTIONS.md](CONVENTIONS.md)
+files before diving into one of these projects.  Those explain our work
+flow and coding conventions to help ensure that your work will be easily
+integrated into libgit2.
 
 Next, work through the build instructions and make sure you can clone the
 repository, compile it, and run the tests successfully.  That will make
@@ -27,7 +28,7 @@ These are good small projects to get started with libgit2.
 * Look at the `examples/` programs, find an existing one that mirrors a
   core Git command and add a missing command-line option.  There are many
   gaps right now and this helps demonstrate how to use the library.  Here
-  are some specific ideas:
+  are some specific ideas (though there are many more):
     * Fix the `examples/diff.c` implementation of the `-B`
       (a.k.a. `--break-rewrites`) command line option to actually look for
       the optional `[<n>][/<m>]` configuration values. There is an
@@ -67,19 +68,44 @@ into one of these as a first project for libgit2 - we'd rather get to
 know you first by successfully shipping your work on one of the smaller
 projects above.
 
+Some of these projects are broken down into subprojects and/or have
+some incremental steps listed towards the larger goal.  Those steps
+might make good smaller projects by themselves.
+
 * Port part of the Git test suite to run against the command line emulation
   in examples/
+    * Pick a Git command that is emulated in our examples/ area
+    * Extract the Git tests that exercise that command
+    * Convert the tests to call our emulation
+    * These tests could go in examples/tests/...
 * Fix symlink support for files in the .git directory (i.e. don't overwrite
   the symlinks when writing the file contents back out)
 * Implement a 'git describe' like API
 * Add hooks API to enumerate and manage hooks (not run them at this point)
+    * Enumeration of available hooks
+    * Lookup API to see which hooks have a script and get the script
+    * Read/write API to load a hook script and write a hook script
+    * Eventually, callback API to invoke a hook callback when libgit2
+      executes the action in question
 * Isolate logic of ignore evaluation into a standalone API
 * Upgrade internal libxdiff code to latest from core Git
-* Add a hashtable lookup for files in the index instead of binary search
-  every time
+* Improve index internals with hashtable lookup for files instead of
+  using binary search every time
 * Make the index write the cache out to disk (with tests to gain
   confidence that the caching invalidation works correctly)
-* Have the tree builder use a hash table when building instead of a
-  list.
+* Tree builder improvements:
+    * Use a hash table when building instead of a list
+    * Extend to allow building a tree hierarchy
 * Move the tagopt mechanism to the newer git 1.9 interpretation of
   --tags [#2120](https://github.com/libgit2/libgit2/issues/2120)
+* Apply-patch API
+* Add a patch editing API to enable "git add -p" type operations
+* Textconv API to filter binary data before generating diffs (something
+  like the current Filter API, probably).
+* Performance profiling and improvement
+* Build in handling of "empty tree" and "empty blob" SHAs
+* Support "git replace" ref replacements
+* Include conflicts in diff results and in status
+    * GIT_DELTA_CONFLICT for items in conflict (with multiple files)
+    * Appropriate flags for status
+* Support sparse checkout (i.e. "core.sparsecheckout" and ".git/info/sparse-checkout")