add readme for developers

README-DEV.md

@@ -0,0 +1,10 @@
+# Workflow for making a release
+
+1. Update `NEWS.md` to list important changes
+2. Check out the `stable` branch, rebase with `master`.
+3. Update `libmxnet_curr_ver` in `deps/build.jl` to the latest commit SHA (or any proper reference). Using `master` here is not good because future changes in libmxnet might break existing Julia packages.
+4. Run tests.
+5. Commit changes and push.
+6. Run `Pkg.tag("MXNet")` in Julia.
+7. Run `Pkg.publish()`, which will open a browser for making a pull request to METADATA.jl.
+8. Edit the [releases page](https://github.com/dmlc/MXNet.jl/releases) to copy the release notes from `NEWS.md` to the newly created release tag.

deps/build.jl

@@ -3,6 +3,7 @@ using Compat
 # First try to detect and load existing libmxnet
 ################################################################################
 libmxnet_detected = false
+libmxnet_curr_ver = "master"
 
 if haskey(ENV, "MXNET_HOME")
   info("MXNET_HOME environment detected: $(ENV["MXNET_HOME"])")
@@ -58,6 +59,7 @@ if !libmxnet_detected
         ChangeDirectory(_srcdir)
         `rm -rf mxnet`
         `git clone --recursive https://github.com/dmlc/mxnet`
+        `git checkout $libmxnet_curr_ver`
         FileRule(joinpath(_libdir, "libmxnet.so"), @build_steps begin
           ChangeDirectory("$_mxdir")
           `cp make/config.mk config.mk`