Retrieve version from version.txt (#2434)

Summary:
Retrieve version from version.txt
These improvement introduced in following PR: https://github.com/pytorch/vision/pull/6117
In addition to this we add version.txt file to help us manage torchaudio version

Pull Request resolved: https://github.com/pytorch/audio/pull/2434

Reviewed By: mthrok

Differential Revision: D36867886

Pulled By: atalman

fbshipit-source-id: 14b6d653e46489d8db1c5ae2016a8202c632861e

packaging/build_conda.sh

@@ -7,7 +7,7 @@ script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 . "$script_dir/pkg_helpers.bash"
 
 export BUILD_TYPE="conda"
-setup_env 0.12.0
+setup_env
 export SOURCE_ROOT_DIR="$PWD"
 setup_conda_pytorch_constraint
 setup_conda_cudatoolkit_constraint

packaging/build_wheel.sh

@@ -7,7 +7,7 @@ script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
 . "$script_dir/pkg_helpers.bash"
 
 export BUILD_TYPE="wheel"
-setup_env 0.12.0
+setup_env
 setup_wheel_python
 pip_install numpy future cmake ninja
 setup_pip_pytorch_version

packaging/pkg_helpers.bash

@@ -97,10 +97,15 @@ setup_cuda() {
 #   BUILD_VERSION (e.g., 0.2.0.dev20190807+cpu)
 #
 # Fill BUILD_VERSION if it doesn't exist already with a nightly string
-# Usage: setup_build_version 0.2.0
+# Or retrieve it from the version.txt
+# Usage: setup_build_version
 setup_build_version() {
   if [[ -z "$BUILD_VERSION" ]]; then
-    export BUILD_VERSION="$1.dev$(date "+%Y%m%d")$VERSION_SUFFIX"
+    SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+    # version.txt for some reason has `a` character after major.minor.rev
+    # command below yields 0.10.0 from version.txt containing 0.10.0a0
+    _VERSION_BASE=$( cut -f 1 -d a "$SCRIPT_DIR/../version.txt" )
+    export BUILD_VERSION="$_VERSION_BASE.dev$(date "+%Y%m%d")$VERSION_SUFFIX"
   else
     export BUILD_VERSION="$BUILD_VERSION$VERSION_SUFFIX"
   fi
@@ -119,7 +124,7 @@ setup_macos() {
 setup_env() {
   git submodule update --init --recursive
   setup_cuda
-  setup_build_version "$1"
+  setup_build_version
   setup_macos
 }
 

version.txt

+0.12.0a0