MM-19606- Rework Prepackaged Plugins (#13449)

* MM-19609 - Add new prepackage configuration settings (#13062)

* Add signatures to the prepackaged plugins (#13138)

* MM-19612 - Support querying local plugin marketplace when upst… (#13250)

* MM-19612 - Support querying local plugin marketplace when upstream unavailable or disabled

* Update translations file

* Fixed comment

* Updated to check EnableRemoteMarketplace setting and LocalOnly to get marketplace plugins

* Fixed unit tests

* Tests cleanup code

* Removed unused error message

* Updated tests

* MM-19614- Updated Marketplace Service error id (#13388)

* [MM-19610] Consume prepackaged plugins (#13005)

* consume prepackaged plugins into memory

* missing i18n

* remove spurious .gitignore changes

* return on failure to install prepackged plugins

* cleanup

* s/plugins/availablePlugins

* whitespace

* don't return extractDir when not needed

* s/plug/plugin

* error on icon, cleanup

* update armored version of testplugin signature

* honour AutomaticPrepackagedPlugins

* document getPrepackagedPlugin

* MM-19613 - Include prepackaged plugins in marketplace results (#13433)

* Added prepackaged plugins to marketplace results

* PR Feedback

* PR Feedback

* Update error where definition

* Removing unnecessary var declaration

* Updated comments

* MM-21263 - Use EnableRemoteMarketplace in marketplace install… (#13438)

* MM-21263 - Use EnableRemoteMarketplace in marketplace install endpoint

* Call updateConfig before calling NewServer in TestHelper

* Added translations

* PR feedback

* Translations

* Feedback

* s/helpers.go/download.go

* Converging env.PrepackagedPlugins

* Initial PR feedback

* Ordered imports properly

* Updated DownloadURL to return slice of bytes

* Fixed method typo

* Fixed logging

* Added read lock for prepackaged plugins list

* PR Feedback

* Added condition to only install prepackaged plugin if it was previously enabled

* Linting

* Updated to check plugin state in config

* Closing filereader

* Only add local label if remote marketplace is enabled

* Updated local tag description

* Fixed tests

Co-authored-by: Ali Farooq <ali.farooq0@pm.me>
Co-authored-by: Shota Gvinepadze <wineson@gmail.com>
Co-authored-by: Jesse Hallam <jesse.hallam@gmail.com>
Co-authored-by: Ben Schumacher <ben.schumacher@mattermost.com>

vendor/github.com/h2non/go-is-svg/.editorconfig

@@ -0,0 +1,12 @@
+root = true
+
+[*]
+indent_style = tabs
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

vendor/github.com/h2non/go-is-svg/.gitignore

@@ -0,0 +1,7 @@
+/bimg
+/bundle
+bin
+/*.jpg
+/*.png
+/*.webp
+/fixtures/*_out.*

vendor/github.com/h2non/go-is-svg/.travis.yml

@@ -0,0 +1,23 @@
+language: go
+
+go:
+  - 1.5
+  - 1.6
+  - 1.7
+  - tip
+
+before_install:
+  - go get github.com/nbio/st
+  - go get -u -v github.com/axw/gocov/gocov
+  - go get -u -v github.com/mattn/goveralls
+  - go get -u -v github.com/golang/lint/golint
+
+script:
+  - diff -u <(echo -n) <(gofmt -s -d ./)
+  - diff -u <(echo -n) <(go vet ./...)
+  - diff -u <(echo -n) <(golint ./...)
+  - go test -v -race ./...
+  - go test -v -race -covermode=atomic -coverprofile=coverage.out
+
+after_success:
+  - goveralls -coverprofile=coverage.out -service=travis-ci

vendor/github.com/h2non/go-is-svg/LICENSE

@@ -0,0 +1,24 @@
+The MIT License
+
+Copyright (c) 2016 Tomas Aparicio
+
+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.

vendor/github.com/h2non/go-is-svg/README.md

@@ -0,0 +1,47 @@
+# go-is-svg [![Build Status](https://travis-ci.org/h2non/go-is-svg.png)](https://travis-ci.org/h2non/go-is-svg) [![GoDoc](https://godoc.org/github.com/h2non/go-is-svg?status.svg)](https://godoc.org/github.com/h2non/go-is-svg) [![Coverage Status](https://coveralls.io/repos/github/h2non/go-is-svg/badge.svg?branch=master)](https://coveralls.io/github/h2non/go-is-svg?branch=master) [![Go Report Card](https://goreportcard.com/badge/github.com/h2non/go-is-svg)](https://goreportcard.com/report/github.com/h2non/go-is-svg)
+
+Tiny package to verify if a given file buffer is an SVG image in Go (golang).
+
+See also [filetype](https://github.com/h2non/filetype) package for binary files type inference.
+
+## Installation
+
+```bash
+go get -u github.com/h2non/go-is-svg
+```
+
+## Example
+
+```go
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	svg "github.com/h2non/go-is-svg"
+)
+
+func main() {
+	buf, err := ioutil.ReadFile("_example/example.svg")
+	if err != nil {
+		fmt.Printf("Error: %s\n", err)
+		return
+	}
+
+	if svg.Is(buf) {
+		fmt.Println("File is an SVG")
+	} else {
+		fmt.Println("File is NOT an SVG")
+	}
+}
+```
+
+Run example:
+```bash
+go run _example/example.go
+```
+
+## License
+
+MIT - Tomas Aparicio

vendor/github.com/h2non/go-is-svg/svg.go

@@ -0,0 +1,36 @@
+package issvg
+
+import (
+	"regexp"
+	"unicode/utf8"
+)
+
+var (
+	htmlCommentRegex = regexp.MustCompile("(?i)<!--([\\s\\S]*?)-->")
+	svgRegex         = regexp.MustCompile(`(?i)^\s*(?:<\?xml[^>]*>\s*)?(?:<!doctype svg[^>]*>\s*)?<svg[^>]*>[^*]*<\/svg>\s*$`)
+)
+
+// isBinary checks if the given buffer is a binary file.
+func isBinary(buf []byte) bool {
+	if len(buf) < 24 {
+		return false
+	}
+	for i := 0; i < 24; i++ {
+		charCode, _ := utf8.DecodeRuneInString(string(buf[i]))
+		if charCode == 65533 || charCode <= 8 {
+			return true
+		}
+	}
+	return false
+}
+
+// Is returns true if the given buffer is a valid SVG image.
+func Is(buf []byte) bool {
+	return !isBinary(buf) && svgRegex.Match(htmlCommentRegex.ReplaceAll(buf, []byte{}))
+}
+
+// IsSVG returns true if the given buffer is a valid SVG image.
+// Alias to: Is()
+func IsSVG(buf []byte) bool {
+	return Is(buf)
+}