Merge branch 'port-2021-05-02' into 'master'

Port 2021 05 02

See merge request dms3/public/go-dms3-blocksutil!1

.github/ISSUE_TEMPLATE/config.yml

+blank_issues_enabled: false
+contact_links:
+ - name: Getting Help on IPFS
+   url: https://ipfs.io/help
+   about: All information about how and where to get help on IPFS.
+ - name: IPFS Official Forum
+   url: https://discuss.ipfs.io
+   about: Please post general questions, support requests, and discussions here.

.github/ISSUE_TEMPLATE/open_an_issue.md

+---
+name: Open an issue
+about: Only for actionable issues relevant to this repository.
+title: ''
+labels: need/triage
+assignees: ''
+
+---
+<!--
+Hello! To ensure this issue is correctly addressed as soon as possible by the IPFS team, please try to make sure:
+
+- This issue is relevant to this repository's topic or codebase.
+
+- A clear description is provided. It should includes as much relevant information as possible and clear scope for the issue to be actionable.
+
+FOR GENERAL DISCUSSION, HELP OR QUESTIONS, please see the options at https://ipfs.io/help or head directly to https://discuss.ipfs.io.
+
+(you can delete this section after reading)
+-->

.github/config.yml

+# Configuration for welcome - https://github.com/behaviorbot/welcome
+
+# Configuration for new-issue-welcome - https://github.com/behaviorbot/new-issue-welcome
+# Comment to be posted to on first time issues
+newIssueWelcomeComment: >
+  Thank you for submitting your first issue to this repository! A maintainer
+  will be here shortly to triage and review.
+
+  In the meantime, please double-check that you have provided all the
+  necessary information to make this process easy! Any information that can
+  help save additional round trips is useful! We currently aim to give
+  initial feedback within **two business days**. If this does not happen, feel
+  free to leave a comment.
+
+  Please keep an eye on how this issue will be labeled, as labels give an
+  overview of priorities, assignments and additional actions requested by the
+  maintainers:
+
+    - "Priority" labels will show how urgent this is for the team.
+    - "Status" labels will show if this is ready to be worked on, blocked, or in progress.
+    - "Need" labels will indicate if additional input or analysis is required.
+
+  Finally, remember to use https://discuss.ipfs.io if you just need general
+  support.
+
+# Configuration for new-pr-welcome - https://github.com/behaviorbot/new-pr-welcome
+# Comment to be posted to on PRs from first time contributors in your repository
+newPRWelcomeComment: >
+  Thank you for submitting this PR!
+
+  A maintainer will be here shortly to review it.
+
+  We are super grateful, but we are also overloaded! Help us by making sure
+  that:
+
+    * The context for this PR is clear, with relevant discussion, decisions
+      and stakeholders linked/mentioned.
+
+    * Your contribution itself is clear (code comments, self-review for the
+      rest) and in its best form. Follow the [code contribution
+      guidelines](https://github.com/ipfs/community/blob/master/CONTRIBUTING.md#code-contribution-guidelines)
+      if they apply.
+
+  Getting other community members to do a review would be great help too on
+  complex PRs (you can ask in the chats/forums). If you are unsure about
+  something, just leave us a comment.
+
+  Next steps:
+
+    * A maintainer will triage and assign priority to this PR, commenting on
+      any missing things and potentially assigning a reviewer for high
+      priority items.
+
+    * The PR gets reviews, discussed and approvals as needed.
+
+    * The PR is merged by maintainers when it has been approved and comments addressed.
+
+  We currently aim to provide initial feedback/triaging within **two business
+  days**. Please keep an eye on any labelling actions, as these will indicate
+  priorities and status of your contribution.
+
+  We are very grateful for your contribution!
+
+
+# Configuration for first-pr-merge - https://github.com/behaviorbot/first-pr-merge
+# Comment to be posted to on pull requests merged by a first time user
+# Currently disabled
+#firstPRMergeComment: ""

.gitlab-ci.yml

+stages:
+  - build
+  - test
+
+variables:
+  BUILD_DIR: "/tmp/$CI_CONCURRENT_PROJECT_ID"
+
+before_script:
+  - mkdir -p $BUILD_DIR/src
+  - cd $BUILD_DIR/src
+  - if [ -d $CI_PROJECT_DIR ]
+  - then
+  -    echo "soft link $CI_PROJECT_DIR exists"
+  - else
+  -    echo "creating soft link $CI_PROJECT_DIR"
+  -    ln -s $CI_PROJECT_DIR
+  - fi
+  - cd $CI_PROJECT_DIR
+
+build:
+  stage: build
+  tags:
+    - testing
+  script:
+    - echo $CI_JOB_STAGE
+    - go build
+
+test:
+  stage: test
+  tags:
+    - testing
+  script:
+    - echo $CI_JOB_STAGE
+    - go test -cover
+  coverage: '/coverage: \d+.\d+% of statements/'

.gx/lastpubver

+0.1.2: QmcbQ44AgbtV1rnxZz5RsRVduxdgNYLANxnsuW5wvvu4ts

.travis.yml

+os:
+  - linux
+
+language: go
+
+go:
+  - 1.11.x
+
+env:
+  global:
+    - GOTFLAGS="-race"
+  matrix:
+    - BUILD_DEPTYPE=gx
+    - BUILD_DEPTYPE=gomod
+
+
+# disable travis install
+install:
+  - true
+
+script:
+  - bash <(curl -s https://raw.githubusercontent.com/ipfs/ci-helpers/master/travis-ci/run-standard-tests.sh)
+
+
+cache:
+  directories:
+    - $GOPATH/src/gx
+    - $GOPATH/pkg/mod
+    - $HOME/.cache/go-build
+
+notifications:
+  email: false

LICENSE

+MIT License
+
+Copyright (c) 2018 IPFS
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

+gx:
+	go get github.com/whyrusleeping/gx
+	go get github.com/whyrusleeping/gx-go
+
+deps: gx
+	gx --verbose install --global
+	gx-go rewrite
+
+publish:
+	gx-go rewrite --undo
+

README.md

-# go-dms3-blocksutil
+# go-ipfs-blocksutil
 
-dms3 blocks utilities
+[![](https://img.shields.io/badge/made%20by-Protocol%20Labs-blue.svg?style=flat-square)](http://ipn.io)
\ No newline at end of file
+[![](https://img.shields.io/badge/project-IPFS-blue.svg?style=flat-square)](http://ipfs.io/)
+[![standard-readme compliant](https://img.shields.io/badge/standard--readme-OK-green.svg?style=flat-square)](https://github.com/RichardLitt/standard-readme)
+[![GoDoc](https://godoc.org/github.com/ipfs/go-ipfs-blocksutil?status.svg)](https://godoc.org/github.com/ipfs/go-ipfs-blocksutil)
+[![Build Status](https://travis-ci.org/ipfs/go-ipfs-blocksutil.svg?branch=master)](https://travis-ci.org/ipfs/go-ipfs-blocksutil)
+
+> go-ipfs-blocksutil provides provides utility functions for working with Blocks.
+
+## Lead Maintainer
+
+[Steven Allen](https://github.com/Stebalien)
+
+## Table of Contents
+
+- [Install](#install)
+- [Usage](#usage)
+- [Contribute](#contribute)
+- [License](#license)
+
+## Install
+
+`go-ipfs-blocksutil` works like a regular Go module:
+
+```
+> go get github.com/ipfs/go-ipfs-blocksutil
+```
+
+## Usage
+
+```
+import "github.com/ipfs/go-ipfs-blocksutil"
+```
+
+Check the [GoDoc documentation](https://godoc.org/github.com/ipfs/go-ipfs-blocksutil)
+
+## Contribute
+
+PRs accepted.
+
+Small note: If editing the README, please conform to the [standard-readme](https://github.com/RichardLitt/standard-readme) specification.
+
+## License
+
+MIT © Protocol Labs, Inc.

block_generator.go

+// Package blocksutil provides utility functions for working
+// with Blocks.
+package blocksutil
+
+import (
+	"fmt"
+
+	blocks "gitlab.dms3.io/dms3/public/go-block-format"
+)
+
+// NewBlockGenerator returns an object capable of
+// producing blocks.
+func NewBlockGenerator() BlockGenerator {
+	return BlockGenerator{}
+}
+
+// BlockGenerator generates BasicBlocks on demand.
+// For each instace of BlockGenerator,
+// each new block is different from the previous,
+// although two different instances will produce the same.
+type BlockGenerator struct {
+	seq int
+}
+
+// Next generates a new BasicBlock.
+func (bg *BlockGenerator) Next() *blocks.BasicBlock {
+	bg.seq++
+	return blocks.NewBlock([]byte(fmt.Sprint(bg.seq)))
+}
+
+// Blocks generates as many BasicBlocks as specified by n.
+func (bg *BlockGenerator) Blocks(n int) []blocks.Block {
+	blocks := make([]blocks.Block, 0, n)
+	for i := 0; i < n; i++ {
+		b := bg.Next()
+		blocks = append(blocks, b)
+	}
+	return blocks
+}

block_generator_test.go

+package blocksutil
+
+import "testing"
+
+func TestBlocksAreDifferent(t *testing.T) {
+	gen := NewBlockGenerator()
+
+	blocks := gen.Blocks(100)
+
+	for i, block1 := range blocks {
+		for j, block2 := range blocks {
+			if i != j {
+				if block1.String() == block2.String() {
+					t.Error("Found duplicate blocks")
+				}
+			}
+		}
+	}
+}

go.mod

+module gitlab.dms3.io/dms3/public/go-dms3-blocksutil
+
+go 1.15
+
+require (
+	gitlab.dms3.io/dms3/public/go-block-format v0.0.1
+)

go.sum

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package.json

+{
+  "author": "hsanjuan",
+  "bugs": {
+    "url": "https://github.com/ipfs/go-ipfs-blocksutil"
+  },
+  "gx": {
+    "dvcsimport": "github.com/ipfs/go-ipfs-blocksutil"
+  },
+  "gxDependencies": [
+    {
+      "author": "stebalien",
+      "hash": "QmYYLnAzR28nAQ4U5MFniLprnktu6eTFKibeNt96V21EZK",
+      "name": "go-block-format",
+      "version": "0.2.2"
+    }
+  ],
+  "gxVersion": "0.12.1",
+  "language": "go",
+  "license": "MIT",
+  "name": "go-ipfs-blocksutil",
+  "releaseCmd": "git commit -a -m \"gx publish $VERSION\"",
+  "version": "0.1.2"
+}
+