dev: discourage bad practices (#803)

.github/ISSUE_TEMPLATE.md

@@ -1,7 +1,43 @@
 Thank you for creating the issue!
 
+- [ ] Yes, I'm using a binary release within 2 latest major releases. Only such installations are supported.
+- [ ] Yes, I've searched similar issues on GitHub and didn't find any.
+- [ ] Yes, I've included all information below (version, config, etc).
+
 Please include the following information:
-1. Version of golangci-lint: `golangci-lint --version` (or git commit if you don't use binary distribution)
-2. Config file: `cat .golangci.yml`
-3. Go environment: `go version && go env`
-4. Verbose output of running: `golangci-lint run -v`
+
+<details><summary>Version of golangci-lint</summary>
+
+```bash
+$ golangci-lint --version
+# paste output here
+```
+
+</details>
+
+<details><summary>Config file</summary>
+
+```bash
+$ cat .golangci.yml
+# paste output here
+```
+
+</details>
+
+<details><summary>Go environment</summary>
+
+```bash
+$ go version && go env
+# paste output here
+```
+
+</details>
+
+<details><summary>Verbose output of running</summary>
+
+```bash
+$ golangci-lint run -v
+# paste output here
+```
+
+</details>

.golangci.example.yml

@@ -225,7 +225,6 @@ linters:
   enable:
     - megacheck
     - govet
-  enable-all: false
   disable:
     - maligned
     - prealloc

.golangci.yml

@@ -48,6 +48,7 @@ linters-settings:
     statements: 50
 
 linters:
+  # please, do not use `enable-all`: it's deprecated and will be removed soon.
   # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
   disable-all: true
   enable:

README.md

@@ -14,24 +14,42 @@ Sponsored by [GolangCI.com](https://golangci.com): SaaS service for running lint
 
 <a href="https://golangci.com/"><img src="docs/go.png" width="250px"></a>
 
-* [Demo](#demo)
-* [Install](#install)
-* [Trusted By](#trusted-by)
-* [Quick Start](#quick-start)
-* [Editor Integration](#editor-integration)
-* [Shell Completion](#shell-completion)
-* [Comparison](#comparison)
-* [Performance](#performance)
-* [Internals](#internals)
-* [Supported Linters](#supported-linters)
-* [Configuration](#configuration)
-* [False Positives](#false-positives)
-* [FAQ](#faq)
-* [Thanks](#thanks)
-* [Changelog](#changelog)
-* [Debug](#debug)
-* [Future Plans](#future-plans)
-* [Contact Information](#contact-information)
+- [GolangCI-Lint](#golangci-lint)
+  - [Demo](#demo)
+  - [Install](#install)
+    - [Binary Release](#binary-release)
+    - [MacOS](#macos)
+    - [By Docker](#by-docker)
+    - [go get](#go-get)
+  - [Trusted By](#trusted-by)
+  - [Quick Start](#quick-start)
+  - [Editor Integration](#editor-integration)
+  - [Shell Completion](#shell-completion)
+    - [Mac OS X](#mac-os-x)
+    - [Linux](#linux)
+  - [Comparison](#comparison)
+    - [`golangci-lint` vs `gometalinter`](#golangci-lint-vs-gometalinter)
+    - [`golangci-lint` vs Running Linters Manually](#golangci-lint-vs-running-linters-manually)
+  - [Performance](#performance)
+    - [Comparison with gometalinter](#comparison-with-gometalinter)
+    - [Why golangci-lint is faster](#why-golangci-lint-is-faster)
+    - [Memory Usage of Golangci-lint](#memory-usage-of-golangci-lint)
+  - [Internals](#internals)
+  - [Supported Linters](#supported-linters)
+    - [Enabled By Default Linters](#enabled-by-default-linters)
+    - [Disabled By Default Linters (`-E/--enable`)](#disabled-by-default-linters--e--enable)
+  - [Configuration](#configuration)
+    - [Command-Line Options](#command-line-options)
+    - [Config File](#config-file)
+  - [False Positives](#false-positives)
+    - [Nolint](#nolint)
+  - [FAQ](#faq)
+  - [Thanks](#thanks)
+  - [Changelog](#changelog)
+  - [Debug](#debug)
+  - [Future Plans](#future-plans)
+  - [Contact Information](#contact-information)
+  - [License Scan](#license-scan)
 
 ## Demo
 
@@ -44,28 +62,28 @@ Short 1.5 min video demo of analyzing [beego](https://github.com/astaxie/beego).
 
 ## Install
 
-### CI Installation
+### Binary Release
 
 Most installations are done for CI (travis, circleci etc). It's important to have reproducible CI:
 don't start to fail all builds at the same time. With golangci-lint this can happen if you
-use `--enable-all` and a new linter is added or even without `--enable-all`: when one upstream linter is upgraded.
+use deprecated option `--enable-all` and a new linter is added or even without `--enable-all`: when one upstream linter is upgraded.
 
 It's highly recommended to install a fixed version of golangci-lint.
 Releases are available on the [releases page](https://github.com/golangci/golangci-lint/releases).
 
-Latest version: ![GitHub release](https://img.shields.io/github/release/golangci/golangci-lint.svg)
+Latest version: [v1.20.0](https://github.com/golangci/golangci-lint/releases/tag/v1.20.0)
 
-Here is the recommended way to install golangci-lint (replace `vX.Y.Z` with the latest version):
+Here is the recommended way to install golangci-lint:
 
 ```bash
 # binary will be $(go env GOPATH)/bin/golangci-lint
-curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(go env GOPATH)/bin vX.Y.Z
+curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s -- -b $(go env GOPATH)/bin v1.20.0
 
 # or install it into ./bin/
-curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s vX.Y.Z
+curl -sfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s v1.20.0
 
 # In alpine linux (as it does not come with curl by default)
-wget -O - -q https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s vX.Y.Z
+wget -O - -q https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh| sh -s v1.20.0
 
 golangci-lint --version
 ```
@@ -74,41 +92,30 @@ Periodically update version of golangci-lint: the project is under active develo
 and is constantly being improved. But please always check for newly found issues and
 update if needed.
 
-### Local Installation
+### MacOS
 
-Local installation is not recommended for your CI pipeline. Only install the linter this way in a local development environment.
-
-#### Windows, MacOS and Linux
-
-```bash
-go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
-```
-
-With `go1.12` or later you can get a particular version
-
-```bash
-GO111MODULE=on go get github.com/golangci/golangci-lint/cmd/golangci-lint@v1.18.0
-```
-
-#### MacOS
-
-You can also install it on MacOS using [brew](https://brew.sh/):
+You can also install a binary release on MacOS using [brew](https://brew.sh/):
 
 ```bash
 brew install golangci/tap/golangci-lint
 brew upgrade golangci/tap/golangci-lint
 ```
 
-#### `--version`
-
-If you need your local `golangci-lint --version` to show proper version additionally run:
+### By Docker
 
 ```bash
-cd $(go env GOPATH)/src/github.com/golangci/golangci-lint/cmd/golangci-lint
-go install -ldflags "-X 'main.version=$(git describe --tags)' -X 'main.commit=$(git rev-parse --short HEAD)' -X 'main.date=$(date)'"
+docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:v1.20.0 golangci-lint run -v
 ```
 
-On Windows, you can run the above commands with Git Bash, which comes with [Git for Windows](https://git-scm.com/download/win).
+### go get
+
+Please, do not install `golangci-lint` by `go get`:
+
+1. [`go.mod`](https://github.com/golangci/golangci-lint/blob/master/go.mod) replacement directive doesn't apply. It means you will be using patched version of `golangci-lint`.
+2. it's much slower than binary installation
+3. it's stability depends on your Go version (e.g. on [this compiler Go <= 1.12 bug](https://github.com/golang/go/issues/29612)).
+4. it's not guaranteed to work: e.g. we've encountered a lot of issues with Go modules hashes.
+5. it allows installation from `master` branch which can't be considered stable.
 
 ## Trusted By
 
@@ -515,7 +522,6 @@ Flags:
       --skip-files strings          Regexps of files to skip
   -E, --enable strings              Enable specific linter
   -D, --disable strings             Disable specific linter
-      --enable-all                  Enable all linters
       --disable-all                 Disable all linters
   -p, --presets strings             Enable presets (bugs|complexity|format|performance|style|unused) of linters. Run 'golangci-lint linters' to see them. This option implies option --disable-all
       --fast                        Run only fast linters from enabled linters set (first run won't be fast)
@@ -818,7 +824,6 @@ linters:
   enable:
     - megacheck
     - govet
-  enable-all: false
   disable:
     - maligned
     - prealloc
@@ -945,6 +950,7 @@ linters-settings:
     statements: 50
 
 linters:
+  # please, do not use `enable-all`: it's deprecated and will be removed soon.
   # inverted configuration with `enable-all` and `disable` is not scalable during updates of golangci-lint
   disable-all: true
   enable:
@@ -1097,7 +1103,7 @@ Long answer:
 
 **`golangci-lint` doesn't work**
 
-1. Update it: `go get -u github.com/golangci/golangci-lint/cmd/golangci-lint`
+1. Please, ensure you are using the latest binary release.
 2. Run it with `-v` option and check the output.
 3. If it doesn't help create a [GitHub issue](https://github.com/golangci/golangci-lint/issues/new) with the output from the error and #2 above.