[Doc] TVM release process (#5151)

* [Doc] TVM release process

* fix tag

* remove things not apply

docs/contribute/index.rst

@@ -48,3 +48,4 @@ Here are guidelines for contributing to various aspect of the project:
    error_handling
    pull_request
    git_howto
+   release_process

docs/contribute/release_process.rst

+..  Licensed to the Apache Software Foundation (ASF) under one
+    or more contributor license agreements.  See the NOTICE file
+    distributed with this work for additional information
+    regarding copyright ownership.  The ASF licenses this file
+    to you under the Apache License, Version 2.0 (the
+    "License"); you may not use this file except in compliance
+    with the License.  You may obtain a copy of the License at
+
+..    http://www.apache.org/licenses/LICENSE-2.0
+
+..  Unless required by applicable law or agreed to in writing,
+    software distributed under the License is distributed on an
+    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+    KIND, either express or implied.  See the License for the
+    specific language governing permissions and limitations
+    under the License.
+
+.. _release_process:
+
+Apache TVM (incubator) Release Process
+======================================
+
+The release manager role in TVM means you are responsible for a few different things:
+
+- Preparing release notes
+- Preparing your setup
+- Preparing for release candidates
+
+  - Cutting a release branch
+  - Informing the community of timing
+  - Making code changes in that branch with necessary version updates
+
+- Running the voting process for a release
+
+  - Creating release candidates
+  - Calling votes and triaging issues
+
+- Finalizing and posting a release:
+
+  - Updating the TVM website
+  - Finalizing release notes
+  - Announcing the release
+
+
+Prepare the Release Notes
+-------------------------
+
+Release note contains new features, improvement, bug fixes, known issues and deprecation, etc. TVM provides `monthly dev report <https://discuss.tvm.ai/search?q=TVM%20Monthly%20%23Announcement>`_ collects developing progress each month. It could be helpful to who writes the release notes.
+
+It is recommended to open a Github issue to collect feedbacks for the release note draft before cutting the release branch.
+
+
+Prepare the GPG Key
+-------------------
+
+You can skip this section if you have already uploaded your key.
+
+After generating the gpg key, you need to upload your key to a public key server. Please refer to https://www.apache.org/dev/openpgp.html#generate-key for details.
+
+If you want to do the release on another machine, you can transfer your gpg key to that machine via the gpg --export and gpg --import commands.
+
+The last step is to update the KEYS file with your code signing key https://www.apache.org/dev/openpgp.html#export-public-key. Check in the changes to the master branch.
+
+
+Cut a Release Candidate
+-----------------------
+
+To cut a release candidate, one needs to first cut a branch using selected version string, e.g.,
+
+.. code-block:: bash
+
+	git clone https://github.com/apache/incubator-tvm.git
+	cd incubator-tvm/
+	git branch v0.6.0
+	git push --set-upstream origin v0.6.0
+
+Go to the GitHub repositories "releases" tab and click "Draft a new release",
+
+- Provide the release tag in the form of “v1.0.0.rc0” where 0 means it’s the first release candidate
+- Select the commit by clicking Target: branch > Recent commits > $commit_hash 
+- Copy and paste release note draft into the description box
+- Select "This is a pre-release"
+
+Notice that one can still apply changes to the BRANCH after the cut, while the TAG is fixed. If any change is required for this release, a new TAG has to be created.
+
+Remove previous release candidate (if applied),
+
+.. code-block:: bash
+
+	git push --delete origin 0.6.0.rc1
+
+Create source code artifacts,
+
+.. code-block:: bash
+
+	git clone git@github.com:apache/incubator-tvm.git apache-tvm-src-v0.6.0.rc0-incubating
+	git checkout v0.6
+	git submodule update --init --recursive
+	git checkout v0.6.0.rc0
+	rm -rf .DS_Store
+	find . -name ".git*" -print0 | xargs -0 rm -rf
+	brew install gnu-tar 
+	gtar -czvf apache-tvm-src-v0.6.0.rc0-incubating.tar.gz apache-tvm-src-v0.6.0.rc0-incubating
+
+Use your GPG key to sign the created artifact. First make sure your GPG is set to use the correct private key,
+
+.. code-block:: bash
+
+	$ cat ~/.gnupg/gpg.conf
+	default-key F42xxxxxxxxxxxxxxx
+
+Create GPG signature as well as the hash of the file,
+
+.. code-block:: bash
+
+	gpg --armor --output apache-tvm-src-v0.6.0.rc0-incubating.tar.gz.asc --detach-sig apache-tvm-src-v0.6.0.rc0-incubating.tar.gz
+	shasum -a 512 apache-tvm-src-v0.6.0.rc0-incubating.tar.gz > apache-tvm-src-v0.6.0.rc0-incubating.tar.gz.sha512
+
+
+Upload the Release Candidate
+----------------------------
+
+Edit the release page on Github and upload the artifacts created by the previous steps.
+
+The release manager also needs to upload the artifacts to ASF SVN,
+
+.. code-block:: bash
+
+	# the --depth=files will avoid checkout existing folders
+	svn co --depth=files "https://dist.apache.org/repos/dist/dev/incubator/tvm" svn-tvm
+	cd svn-tvm
+	mkdir tvm-v0.6.0-rc0
+	# copy files into it
+	svn add tvm-0.6.0-rc0 
+	svn ci --username $ASF_USERNAME --password "$ASF_PASSWORD" -m "Add RC"
+
+
+Call a Vote on the Release Candidate
+------------------------------------
+
+As an incubator project, it requires voting on both dev@ and general@.
+
+The first voting takes place on the Apache TVM (incubator) developers list (dev@tvm.apache.org). To get more attention, one can create a github issue start with "[VOTE]" instead, it will be mirrored to dev@ automatically. Look at past voting threads to see how this proceeds. The email should follow this format.
+
+- Provide the link to the draft of the release notes in the email
+- Provide the link to the release candidate artifacts
+- Make sure the email is in text format and the links are correct
+
+For the dev@ vote, there must be at least 3 binding +1 votes and more +1 votes than -1 votes. Once the vote is done, you should also send out a summary email with the totals, with a subject that looks something like [VOTE][RESULT] ....
+
+The voting then moves onto the general@incubator.apache.org. Anyone can contribute a vote, but only "Incubator PMC" (IPMC) votes are binding.
+To pass, there must be 3 binding +1 votes and more +1 votes than -1 votes.
+
+In ASF, votes are open "at least" 72hrs (3 days). If you don't get enough number of binding votes within that time, you cannot close the voting deadline. You need to extend it.
+
+Same as the one on dev@, send out a summary email to general@ once the vote passes.
+
+If either voting fails, the community needs to modified the release accordingly, create a new release candidate and re-run the voting process.
+
+
+Post the Release
+----------------
+
+After the vote passes, to upload the binaries to Apache mirrors, you move the binaries from dev directory (this should be where they are voted) to release directory. This "moving" is the only way you can add stuff to the actual release directory. (Note: only PMC can move to release directory)
+
+.. code-block:: bash
+
+	export SVN_EDITOR=vim
+	svn mkdir https://dist.apache.org/repos/dist/release/incubator/tvm
+	svn mv https://dist.apache.org/repos/dist/dev/incubator/tvm/tvm-v0.6.0-rc2 https://dist.apache.org/repos/dist/release/incubator/tvm/tvm-v0.6.0
+
+	# If you've added your signing key to the KEYS file, also update the release copy.
+	svn co --depth=files "https://dist.apache.org/repos/dist/release/incubator/tvm" svn-tvm
+	curl "https://dist.apache.org/repos/dist/dev/incubator/tvm/KEYS" > svn-tvm/KEYS
+	(cd svn-tvm && svn ci --username $ASF_USERNAME --password "$ASF_PASSWORD" -m"Update KEYS")
+
+
+Update the TVM Website
+----------------------
+
+The website repository is located at `https://github.com/apache/incubator-tvm-site <https://github.com/apache/incubator-tvm-site>`_. Modify the download page to include the release artifacts as well as the GPG signature and SHA hash.
+