chore(CI): cleanup + run CI jobs with Github actions (#304)

This PR will add workflows to run Ristretto tests. It also does some
basic cleanup and updates the code owners.

Notable points:
- go version is now pinned in .go-version and referenced by the workflow
- test.sh is deprecated since it only was only relevant for TeamCity
environments (it was a fancy wrapper on top of `go test -v ./...`)
- ci-ristretto-tests and ci-ristretto-lint bring this repository to
parity with the dgraph repository
- main.yml was removed since we are no longer automatically closing
issues
- Coveralls now used for test coverage
- Issue template updated
- Pull Request template added

.github/CODEOWNERS

@@ -1,4 +1,4 @@
 # CODEOWNERS info: https://help.github.com/en/articles/about-code-owners
 # Owners are automatically requested for review for PRs that changes code
 # that they own.
-* @manishrjain @martinmr @jarifibrahim
+* @akon-dey @nosql22 @joshua-goldstein @skrdgraph

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,62 @@
+name: "🐞 Bug Report"
+description: File a bug report
+title: "[BUG]: <Title>"
+labels: ["kind/bug", "status/triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for reporting an issue.
+        If you suspect this could be a bug, please follow this template.
+  - type: textarea
+    attributes:
+      label: What version of Ristretto are you using?
+      description: Copy and paste the tag or commit hash used in your application's go.mod file.
+      placeholder: |
+        Paste here.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: What version of Go are you using?
+      description: Copy and paste all you see using the command 'go version'.
+      placeholder: |
+        Paste here.
+    validations:
+      required: false
+  - type: dropdown
+    attributes:
+      label: Have you tried reproducing the issue with the latest release?
+      options:
+        - "Yes"
+        - "No"
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: What is the hardware spec (RAM, CPU, OS)?
+      description: Share all possible context of your machine.
+      placeholder: |
+        Type here.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What steps will reproduce the bug?
+      description: Enter details about your bug (command/config used to set up Ristretto).
+      placeholder: |
+        Type here.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Expected behavior and actual result.
+      description: Enter details about your expectations.
+      placeholder: |
+        Type here.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional information
+      description: Tell us anything else you think we should know.

.github/ISSUE_TEMPLATE/documentation_request.yml

@@ -0,0 +1,30 @@
+name: "📃 Documentation Request"
+description: Suggest improvements, additions, or revisions to Ristretto documentation
+title: "[Documentation]: <Title>"
+labels: ["area/documentation", "status/triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for reporting an issue.
+        If you think Ristretto's documentation is lacking, please explain it here.
+  - type: textarea
+    attributes:
+      label: What version of Ristretto is the target?
+      description: Is it the latest version? 
+      placeholder: |
+        Type here.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Documentation.
+      description: Explain which part of the documentation is lacking.
+      placeholder: |
+          Type here.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Additional information.
+      description: Tell us anything else you think we should know.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,49 @@
+name: "⚡ Feature Request"
+description: Suggest a new feature
+title: "[FEATURE]: <Title>"
+labels: ["kind/feature ", "status/triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thank you for reporting an issue.
+        If you think we can make Ristretto better, describe your feature request here.
+        Note: Feature requests are judged based on user experience and modeled on 
+        [Go Experience Reports](https://github.com/golang/go/wiki/ExperienceReports). 
+        These reports should focus on the problems - they should not focus on and need not propose solutions.
+  - type: dropdown
+    attributes:
+      label: Have you tried Ristretto before this proposal? and did not find anything similar?
+      options:
+        - "Yes"
+        - "No"
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: What you wanted to do.
+      description: Enter details about your expectations.
+      placeholder: |
+          Type here.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: What you actually did.
+      description: Enter details about your experience with Ristretto.
+      placeholder: |
+          Type here.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Why wasn't it great, with examples.
+      description: Enter details about your expectations.
+      placeholder: |
+          Type here.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional information.
+      description: Any external references to support your case.

.github/ISSUE_TEMPLATE/question.yml

@@ -0,0 +1,14 @@
+name: "🙋 Question"
+description: Question related to Ristretto
+title: "[QUESTION]: <Title>"
+labels: ["kind/question ", "status/triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        The issue tracker is primarily for code related issues, bug reports, missing documentation, or feature requests.
+        - If you have a question, please consider asking it on https://discuss.dgraph.io
+  - type: textarea
+    attributes:
+      label: Question.
+      description: Ask your Question.

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,29 @@
+<!--
+ Change Github PR Title 
+
+ Your title must be in the following format: 
+ - `topic(Area): Feature`
+ - `Topic` must be one of `build|ci|docs|feat|fix|perf|refactor|chore|test`
+
+ Sample Titles:
+ - `feat(Enterprise)`: Backups can now get credentials from IAM
+ - `fix(Query)`: Skipping floats that cannot be Marshalled in JSON
+ - `perf: [Breaking]` json encoding is now 35% faster if SIMD is present
+ - `chore`: all chores/tests will be excluded from the CHANGELOG
+ -->
+
+## Problem
+ <!--
+ Please add a description with these things:
+ 1. Explain the problem by providing a good description.
+ 2. If it fixes any GitHub issues, say "Fixes #GitHubIssue".
+ 3. If it corresponds to a Jira issue, say "Fixes DGRAPH-###".
+ 4. If this is a breaking change, please prefix `[Breaking]` in the title. In the description, please put a note with exactly who these changes are breaking for.
+ -->
+
+## Solution
+ <!--
+ Please add a description with these things:
+ 1. Explain the solution to make it easier to review the PR.
+ 2. Make it easier for the reviewer by describing complex sections with comments.
+ -->

.github/workflows/ci-ristretto-lint.yml

@@ -0,0 +1,27 @@
+name: ci-ristretto-lint
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+  schedule:
+    - cron: "0 * * * *"
+jobs:
+  go-lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: golang-lint
+        env:
+          # prevent OOM
+          GOGC: 10
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.36
+          only-new-issues: true
+          args: --timeout=10m
+          skip-go-installation: true

.github/workflows/ci-ristretto-tests.yml

@@ -0,0 +1,34 @@
+name: ci-ristretto-tests
+on:
+  push:
+    branches:
+      - main 
+  pull_request:
+    branches:
+      - main 
+  schedule:
+    - cron: "30 * * * *"
+jobs:
+  ristretto-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Get Go Version
+        run: |
+          #!/bin/bash
+          DEFAULT_VERSION="1.17"
+          GOVERSION=$({ [ -f .go-version ] && cat .go-version; } || echo $DEFAULT_VERSION)
+          echo "GOVERSION=$GOVERSION" >> $GITHUB_ENV
+      - name: Setup Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: ${{ env.GOVERSION }}
+      - name: Run Unit Tests
+        run: go test -race -covermode atomic -coverprofile=covprofile ./...
+      - name: Install Goveralls
+        run: go install github.com/mattn/goveralls@latest
+      - name: Send Coverage Results
+        env:
+          COVERALLS_TOKEN: ${{ secrets.COVERALLSIO_TOKEN }}
+        run: goveralls -coverprofile=covprofile
+

.go-version

@@ -0,0 +1 @@
+1.17.11

.golangci.yml

@@ -0,0 +1,22 @@
+run:
+  tests: false
+  skip-dirs:
+    - contrib
+
+linters-settings:
+  lll:
+    line-length: 120
+
+linters:
+  disable-all: true
+  enable:
+    #- errcheck
+    #- ineffassign
+    - gas
+    #- gofmt
+    #- golint
+    #- gosimple
+    #- govet
+    - lll
+    #- varcheck
+    #- unused

README.md

@@ -1,16 +1,15 @@
 # Ristretto
 [![Go Doc](https://img.shields.io/badge/godoc-reference-blue.svg)](http://godoc.org/github.com/dgraph-io/ristretto)
+[![ci-ristretto-tests](https://github.com/dgraph-io/ristretto/actions/workflows/ci-ristretto-tests.yml/badge.svg)](https://github.com/dgraph-io/ristretto/actions/workflows/ci-ristretto-tests.yml)
+[![ci-ristretto-lint](https://github.com/dgraph-io/ristretto/actions/workflows/ci-ristretto-lint.yml/badge.svg)](https://github.com/dgraph-io/ristretto/actions/workflows/ci-ristretto-lint.yml)
+[![Coverage Status](https://coveralls.io/repos/github/dgraph-io/ristretto/badge.svg?branch=main)](https://coveralls.io/github/dgraph-io/ristretto?branch=main)
 [![Go Report Card](https://img.shields.io/badge/go%20report-A%2B-brightgreen)](https://goreportcard.com/report/github.com/dgraph-io/ristretto)
-[![Coverage](https://gocover.io/_badge/github.com/dgraph-io/ristretto)](https://gocover.io/github.com/dgraph-io/ristretto)
-![Tests](https://github.com/dgraph-io/ristretto/workflows/tests/badge.svg)
 
 Ristretto is a fast, concurrent cache library built with a focus on performance and correctness.
 
 The motivation to build Ristretto comes from the need for a contention-free
 cache in [Dgraph][].
 
-**Use [Discuss Issues](https://discuss.dgraph.io/tags/c/issues/35/ristretto/40) for reporting issues about this repository.**
-
 [Dgraph]: https://github.com/dgraph-io/dgraph
 
 ## Features