update some of the commands described in the README (#63)

README.md

@@ -16,11 +16,9 @@ workflow
 The general workflow for publishing new binaries is:
 
 1. Create a script that will build the binary tool as reproducibly as possible, and place
-   it in a relevant directory under `build-support`. For example, for `thrift` `0.10.0` for `osx`,
-   you'd create the script at `build-support/bin/thrift/mac/10.13/0.10.0/build.sh`.
-2. Symlink the script directory into all other relevant versions for both platforms. For OSX, this
-   will generally include "all modern OSX versions": ie,
-   `build-support/bin/thrift/mac/{10.13,10.12,10.11,10.10,etc}`.
+   the script in a relevant directory under `build-support`. For example, for `thrift` `0.10.0` for `mac`,
+   you'd create the script at `build-support/bin/thrift/mac/10.13/0.10.0/build.sh`. The script should place the built binary in the current directory upon success so that the reviewer doesn't have to find and move it after running the build script.
+2. Symlink the script directory into all other relevant versions for both platforms (see [supported platforms](#supported-platforms)). Currently this only needs to be done for OSX. If `10.13` is the current OSX version, from within e.g. `build-support/bin/thrift/mac`, run `ln -s 10.13 10.12`, and so forth (e.g. `ln -s 10.13 10.11`) for all supported previous OSX versions.
 3. Get the script and links reviewed. During review, the reviewer should confirm that the script
    successfully produces a binary on their machine(s).
 4. The script should then be merged _without_ the produced binaries.
@@ -37,21 +35,21 @@ building
 linux
 -----
 
-Requires [docker](https://www.docker.com/)
+*Requires [docker](https://www.docker.com/).*
 
-1. Change directories to the root of this repository.
+1. Change directories to the root of this repository, and run:
   ```
-  docker run -v "$(pwd):/pantsbuild-binaries" --rm -it --entrypoint /bin/bash pantsbuild/centos6:latest && cd /pantsbuild-binaries
+  docker run -v "$(pwd):/pantsbuild-binaries" -w '/pantsbuild-binaries' --rm -it pantsbuild/centos6:latest /bin/bash
   ```
-  ...to pop yourself in a controlled image back at this repo's root
-2. Run the build-\*.sh script corresponding to the binary you wish to build
-3. Manually move the binary from the build tree to its home in build-support/...
+  ...to pop yourself in a controlled image back at this repo's root.
+
+2. Change into the directory containing the `build-*.sh` script corresponding to the binary you wish to build.
+3. Run the `build-*.sh` script -- the binary should be location in the script's directory upon success.
 
 osx
 ---
 
 We have no controlled build environment solution like we do for linux, so you'll need to get your hands on an OSX machine.  With that in hand:
 
-1. Run the build-\*.sh script corresponding to the binary you wish to build
-2. manually move the binary from the build tree to its home in build-support/...
-
+1. Change into the directory containing the `build-*.sh` script corresponding to the binary you wish to build.
+2. Run the `build-*.sh` script -- the binary should be location in the script's directory upon success.