feat(yamllint): include for this repo and apply rules throughout

* Semi-automated using `ssf-formula` (v0.5.0)
* Fix errors shown below:

```bash
nginx-formula$ $(grep "\- yamllint" .travis.yml | sed -e "s:^\s\+-\s\(.*\):\1:")
pillar.example
  5:1       warning  missing document start "---"  (document-start)
  6:89      error    line too long (110 > 88 characters)  (line-length)
  7:89      error    line too long (99 > 88 characters)  (line-length)
  19:89     error    line too long (132 > 88 characters)  (line-length)
  35:25     warning  truthy value should be one of [false, true]  (truthy)
  36:89     error    line too long (106 > 88 characters)  (line-length)
  40:89     error    line too long (115 > 88 characters)  (line-length)
  43:16     warning  truthy value should be one of [false, true]  (truthy)
  44:89     error    line too long (105 > 88 characters)  (line-length)
  48:16     warning  truthy value should be one of [false, true]  (truthy)
  54:14     warning  too few spaces before comment  (comments)
  57:13     warning  truthy value should be one of [false, true]  (truthy)
  57:18     warning  too few spaces before comment  (comments)
  58:14     warning  too few spaces before comment  (comments)
  60:5      warning  missing starting space in comment  (comments)
  60:89     error    line too long (96 > 88 characters)  (line-length)
  61:89     error    line too long (90 > 88 characters)  (line-length)
  62:89     error    line too long (90 > 88 characters)  (line-length)
  63:89     error    line too long (94 > 88 characters)  (line-length)
  64:5      warning  missing starting space in comment  (comments)
  64:89     error    line too long (96 > 88 characters)  (line-length)
  68:9      error    wrong indentation: expected 10 but found 8  (indentation)
  76:9      error    wrong indentation: expected 10 but found 8  (indentation)
  86:9      error    wrong indentation: expected 10 but found 8  (indentation)
  90:14     warning  too few spaces before comment  (comments)
  90:89     error    line too long (104 > 88 characters)  (line-length)
  92:6      warning  missing starting space in comment  (comments)
  92:89     error    line too long (106 > 88 characters)  (line-length)
  94:89     error    line too long (104 > 88 characters)  (line-length)
  97:6      warning  missing starting space in comment  (comments)
  97:89     error    line too long (106 > 88 characters)  (line-length)
  100:62    warning  too few spaces before comment  (comments)
  100:89    error    line too long (121 > 88 characters)  (line-length)
  101:62    warning  comment not indented like content  (comments-indentation)
  101:89    error    line too long (116 > 88 characters)  (line-length)
  102:89    error    line too long (112 > 88 characters)  (line-length)
  103:89    error    line too long (99 > 88 characters)  (line-length)
  105:89    error    line too long (124 > 88 characters)  (line-length)
  106:8     warning  missing starting space in comment  (comments)
  106:89    error    line too long (117 > 88 characters)  (line-length)
  112:89    error    line too long (97 > 88 characters)  (line-length)
  120:31    warning  missing starting space in comment  (comments)
  123:89    error    line too long (95 > 88 characters)  (line-length)
  127:13    error    wrong indentation: expected 14 but found 12  (indentation)
  151:33    warning  too few spaces before comment  (comments)
  151:89    error    line too long (94 > 88 characters)  (line-length)
  152:22    warning  too few spaces before comment  (comments)
  152:89    error    line too long (90 > 88 characters)  (line-length)
  153:21    warning  too few spaces before comment  (comments)
  153:89    error    line too long (101 > 88 characters)  (line-length)
  154:22    warning  too few spaces before comment  (comments)
  155:18    warning  too few spaces before comment  (comments)
  155:89    error    line too long (103 > 88 characters)  (line-length)
  163:89    error    line too long (100 > 88 characters)  (line-length)
  164:89    error    line too long (106 > 88 characters)  (line-length)
  165:18    warning  truthy value should be one of [false, true]  (truthy)
  167:89    error    line too long (109 > 88 characters)  (line-length)
  170:10    warning  missing starting space in comment  (comments)
  172:10    warning  missing starting space in comment  (comments)
  172:89    error    line too long (120 > 88 characters)  (line-length)
  173:10    warning  missing starting space in comment  (comments)
  173:89    error    line too long (118 > 88 characters)  (line-length)
  174:89    error    line too long (120 > 88 characters)  (line-length)
  175:20    warning  truthy value should be one of [false, true]  (truthy)
  175:89    error    line too long (102 > 88 characters)  (line-length)
  177:89    error    line too long (100 > 88 characters)  (line-length)
  178:89    error    line too long (101 > 88 characters)  (line-length)
  182:13    error    wrong indentation: expected 14 but found 12  (indentation)
  184:15    error    wrong indentation: expected 16 but found 14  (indentation)
  186:15    error    wrong indentation: expected 16 but found 14  (indentation)
  189:15    error    wrong indentation: expected 16 but found 14  (indentation)
  193:9     warning  comment not indented like content  (comments-indentation)
  196:13    error    wrong indentation: expected 14 but found 12  (indentation)
  198:15    error    wrong indentation: expected 16 but found 14  (indentation)
  202:15    error    wrong indentation: expected 16 but found 14  (indentation)
  206:9     warning  comment not indented like content  (comments-indentation)
  218:16    warning  too few spaces before comment  (comments)
  218:89    error    line too long (96 > 88 characters)  (line-length)
  219:18    warning  truthy value should be one of [false, true]  (truthy)
  223:57    warning  too few spaces before comment  (comments)
  223:89    error    line too long (111 > 88 characters)  (line-length)
  224:57    warning  comment not indented like content  (comments-indentation)
  224:89    error    line too long (118 > 88 characters)  (line-length)
  226:89    error    line too long (90 > 88 characters)  (line-length)
  236:18    warning  truthy value should be one of [false, true]  (truthy)
  245:89    error    line too long (108 > 88 characters)  (line-length)
  252:89    error    line too long (104 > 88 characters)  (line-length)
  305:89    error    line too long (115 > 88 characters)  (line-length)
  306:32    error    trailing spaces  (trailing-spaces)

test/salt/default/pillar/nginx.sls
  1:1       error    too many blank lines (1 > 0)  (empty-lines)
  7:1       warning  missing document start "---"  (document-start)
  11:9      error    wrong indentation: expected 10 but found 8  (indentation)
  23:18     warning  truthy value should be one of [false, true]  (truthy)
  24:18     warning  truthy value should be one of [false, true]  (truthy)
  28:18     warning  truthy value should be one of [false, true]  (truthy)
  31:13     error    wrong indentation: expected 14 but found 12  (indentation)
  33:15     error    wrong indentation: expected 16 but found 14  (indentation)
  36:15     error    wrong indentation: expected 16 but found 14  (indentation)
  38:1      error    too many blank lines (1 > 0)  (empty-lines)
```

.travis.yml

@@ -3,7 +3,7 @@
 ---
 stages:
   - test
-  - commitlint
+  - lint
   - name: release
     if: branch = master AND type != pull_request
 
@@ -45,16 +45,21 @@ script:
 
 jobs:
   include:
-    # Define the commitlint stage
+    # Define the `lint` stage (runs `yamllint` and `commitlint`)
-    - stage: commitlint
+    - stage: lint
       language: node_js
       node_js: lts/*
       before_install: skip
       script:
+        # Install and run `yamllint`
+        - pip install --user yamllint
+        # yamllint disable-line rule:line-length
+        - yamllint -s . .yamllint pillar.example test/salt/default/pillar/nginx.sls
+        # Install and run `commitlint`
         - npm install @commitlint/config-conventional -D
         - npm install @commitlint/travis-cli -D
         - commitlint-travis
-    # Define the release stage that runs semantic-release
+    # Define the release stage that runs `semantic-release`
     - stage: release
       language: node_js
       node_js: lts/*

.yamllint

@@ -0,0 +1,16 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+---
+# Extend the `default` configuration provided by `yamllint`
+extends: default
+
+# Files to ignore completely
+# 1. All YAML files under directory `node_modules/`, introduced during the Travis run
+ignore: |
+  node_modules/
+
+rules:
+  line-length:
+    # Increase from default of `80`
+    # Based on https://github.com/PyCQA/flake8-bugbear#opinionated-warnings (`B950`)
+    max: 88

pillar.example

@@ -1,11 +1,15 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+---
 # ========
 # nginx (previously named nginx:ng)
 # ========
 
 nginx:
-  # The following three `install_from_` options are mutually exclusive. If none is used, the distro's provided
+  # The following three `install_from_` options are mutually exclusive. If none
-  # package will be installed. If one of the `install_from` option is set to `True`, the state will
+  # is used, the distro's provided package will be installed. If one of the
-  # make sure the other two repos are removed.
+  # `install_from` option is set to `true`, the state will make sure the other
+  # two repos are removed.
 
   # Use the official's nginx repo binaries
   install_from_repo: false
@@ -16,7 +20,8 @@ nginx:
 
   # PPA install
   install_from_ppa: false
-  # Set to 'stable', 'development' (mainline), 'community', or 'nightly' for each build accordingly ( https://launchpad.net/~nginx )
+  # Set to 'stable', 'development' (mainline), 'community', or 'nightly' for
+  # each build accordingly ( https://launchpad.net/~nginx )
   ppa_version: 'stable'
 
   # Source install
@@ -32,20 +37,23 @@ nginx:
     conf_file: /etc/nginx/nginx.conf
     server_available: /etc/nginx/sites-available
     server_enabled: /etc/nginx/sites-enabled
-    server_use_symlink: True
+    server_use_symlink: true
-    # If you install nginx+passenger from phusionpassenger in Debian, these values will probably be needed
+    # If you install nginx+passenger from phusionpassenger in Debian, these
+    # values will probably be needed
     passenger_package: libnginx-mod-http-passenger
     passenger_config_file: /etc/nginx/conf.d/mod-http-passenger.conf
 
-    # This is required for RedHat like distros (Amazon Linux) that don't follow semantic versioning for $releasever
+    # This is required for RedHat like distros (Amazon Linux) that don't follow
+    # semantic versioning for $releasever
     rh_os_releasever: '6'
     # Currently it can be used on rhel/centos/suse when installing from repo
-    gpg_check: True
+    gpg_check: true
-    pid_file: /var/run/nginx.pid   ### prevents rendering SLS error nginx.server.config.pid undefined ###
+    ### prevents rendering SLS error nginx.server.config.pid undefined ###
+    pid_file: /var/run/nginx.pid
 
 
   # Source compilation is not currently a part of nginx
-  from_source: False
+  from_source: false
 
   source:
     opts: {}
@@ -54,14 +62,15 @@ nginx:
     opts: {}  # this partially exposes parameters of pkg.installed
 
   service:
-    enable: True # Whether or not the service will be enabled/running or dead
+    enable: true  # Whether or not the service will be enabled/running or dead
     opts: {}  # this partially exposes parameters of service.running / service.dead
 
-  ##--- --- - - - - - - -- - - - - -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
+  ## - - --  - - -- -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
-  ## You can use snippets to define often repeated configuration once and include it later
+  ## You can use snippets to define often repeated configuration once and
-  ## The letsencrypt example below is consumed by "- include: 'snippets/letsencrypt.conf'"
+  ## include it later # The letsencrypt example below is consumed by "- include:
-  ## Files or Templates can be retrieved by TOFS with snippet name ( Fallback to server.conf )
+  ## 'snippets/letsencrypt.conf'" # Files or Templates can be retrieved by TOFS
-  ##--- --- - - - - - - --  - - -- -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
+  ## with snippet name ( Fallback to server.conf )
+  ## - - --  - - -- -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
   snippets:
     letsencrypt.conf:
       - location ^~ /.well-known/acme-challenge/:
@@ -87,29 +96,34 @@ nginx:
           - keepalive: 64
 
   server:
-    opts: {} # this partially exposes file.managed parameters as they relate to the main nginx.conf file
+    # this partially exposes file.managed parameters as they relate to the main
+    # nginx.conf file
+    opts: {}
 
-    #-- - - - - -- - - -- - - - - -- - - -- - - - -- - - - - - -- - - - - - -- - - - - -- - - - - -- - - #
+    ## - - --  - - -- -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
-    # nginx.conf (main server) declarations
+    # nginx.conf (main server) declarations dictionaries map to blocks {} and
-    # dictionaries map to blocks {} and lists cause the same declaration to repeat with different values
+    # lists cause the same declaration to repeat with different values see also
-    # see also http://nginx.org/en/docs/example.html
+    # http://nginx.org/en/docs/example.html Nginx config file or template can
-    # Nginx config file or template can be retrieved by TOFS ( Fallback to nginx.conf )
+    # be retrieved by TOFS ( Fallback to nginx.conf )
-    #-- - - - - -- - - -- - - - - -- - - -- - - - -- - - - - - -- - - - - - -- - - - - -- - - - - -- - - #
+    ## - - --  - - -- -- - - --- -- - -- - - - -- - - - - -- - - - -- - - - -- - ##
     config:
       include: 'snippets/letsencrypt.conf'
-      source_path: salt://path_to_nginx_conf_file/nginx.conf # IMPORTANT: This option is mutually exclusive with TOFS and
+      # IMPORTANT: This option is mutually exclusive with TOFS and the rest of
-                                                             # the rest of the options; if it is found other options
+      # the options; if it is found other options (worker_processes: 4 and so
-                                                             # (worker_processes: 4 and so on) are not processed
+      # on) are not processed and just upload the file from source
-                                                             # and just upload the file from source
+      source_path: salt://path_to_nginx_conf_file/nginx.conf
       worker_processes: 4
-      load_module: modules/ngx_http_lua_module.so  # pass as very first in configuration; otherwise nginx will fail to start
+      # pass as very first in configuration; otherwise nginx will fail to start
-      #pid: /var/run/nginx.pid                     # Directory location must exist (i.e. it's  /run/nginx.pid on EL7)
+      load_module: modules/ngx_http_lua_module.so
+      # Directory location must exist (i.e. it's  /run/nginx.pid on EL7)
+      # pid: /var/run/nginx.pid
       events:
         worker_connections: 1024
       http:
         sendfile: 'on'
         include:
-          #### Note: Syntax issues in these files generate nginx [emerg] errors on startup.  ####
+          #### Note: Syntax issues in these files generate nginx [emerg] errors
+          #### on startup.
           - /etc/nginx/mime.types
 
         ### module ngx_http_log_module example
@@ -119,8 +133,9 @@ nginx:
                               '"$http_user_agent" "$http_x_forwarded_for"'
         access_log: []  # suppress default access_log option from being added
 
-      ### module nngx_stream_core_module
+      # module nngx_stream_core_module
-      ### https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/#example
+      # yamllint disable-line rule:line-length
+      # https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/#example
       stream:
         upstream lb-1000:
           - server:
@@ -148,11 +163,17 @@ nginx:
 
 
   servers:
-    disabled_postfix: .disabled # a postfix appended to files when doing non-symlink disabling
+    # a postfix appended to files when doing non-symlink disabling
-    symlink_opts: {} # partially exposes file.symlink params when symlinking enabled sites
+    disabled_postfix: .disabled
-    rename_opts: {} # partially exposes file.rename params when not symlinking disabled/enabled sites
+    # partially exposes file.symlink params when symlinking enabled sites
-    managed_opts: {} # partially exposes file.managed params for managed server files
+    symlink_opts: {}
-    dir_opts: {} # partially exposes file.directory params for site available/enabled and snippets dirs
+    # partially exposes file.rename params when not symlinking disabled/enabled sites
+    rename_opts: {}
+    # partially exposes file.managed params for managed server files
+    managed_opts: {}
+    # partially exposes file.directory params for site available/enabled and
+    # snippets dirs
+    dir_opts: {}
 
 
     #####################
@@ -160,24 +181,46 @@ nginx:
     #####################
     managed:
 
-      mysite:  # relative filename of server file  (defaults to '/etc/nginx/sites-available/mysite')
+      # relative filename of server file
-        # may be True, False, or None where True is enabled, False, disabled, and None indicates no action
+      # (defaults to '/etc/nginx/sites-available/mysite')
-        enabled: True
+      mysite:
+        # may be true, false, or None where true is enabled, false, disabled,
+        # and None indicates no action
+        enabled: true
 
-        # Remove the site config file shipped by nginx (i.e. '/etc/nginx/sites-available/default' by default)
+        # Remove the site config file shipped by nginx
+        # (i.e. '/etc/nginx/sites-available/default' by default)
         # It also remove the symlink (if it is exists).
-        # The site MUST be disabled before delete it (if not the nginx is not reloaded).
+        # The site MUST be disabled before delete it (if not the nginx is not
-        #deleted: True
+        # reloaded).
+        # deleted: true
 
-        #available_dir: /etc/nginx/sites-available-custom   # custom directory (not sites-available) for server filename
+        # custom directory (not sites-available) for server filename
-        #enabled_dir: /etc/nginx/sites-enabled-custom       # custom directory (not sites-enabled) for server filename
+        # available_dir: /etc/nginx/sites-available-custom
-        disabled_name: mysite.aint_on                       # an alternative disabled name to be use when not symlinking
+        # custom directory (not sites-enabled) for server filename
-        overwrite: True                                     # overwrite an existing server file or not
+        # enabled_dir: /etc/nginx/sites-enabled-custom
+        # an alternative disabled name to be use when not symlinking
+        disabled_name: mysite.aint_on
+        # overwrite an existing server file or not
+        overwrite: true
 
-        # May be a list of config options or None, if None, no server file will be managed/templated
+        # May be a list of config options or None, if None, no server file will
-        # Take server directives as lists of dictionaries. If the dictionary value is another list of
+        # be managed/templated Take server directives as lists of dictionaries.
-        # dictionaries a block {} will be started with the dictionary key name
+        # If the dictionary value is another list of dictionaries a block {}
+        # will be started with the dictionary key name
         config:
+          # both of the methods below lead to the output:
+          # server {
+          #    server_name localhost;
+          #    listen 80 default_server;
+          #    listen 443 ssl;
+          #    index index.html index.htm;
+          #    location ~ .htm {
+          #        try_files $uri $uri/ =404;
+          #        test something else;
+          #    }
+          # }
+
           - server:
               - server_name: localhost
               - listen:
@@ -191,7 +234,6 @@ nginx:
               - include: 'snippets/letsencrypt.conf'
 
           # Or a slightly more compact alternative syntax:
-
           - server:
               - server_name: localhost
               - listen:
@@ -203,29 +245,20 @@ nginx:
                   - test: something else
               - include: 'snippets/letsencrypt.conf'
 
-        # both of those output:
-        # server {
-        #    server_name localhost;
-        #    listen 80 default_server;
-        #    listen 443 ssl;
-        #    index index.html index.htm;
-        #    location ~ .htm {
-        #        try_files $uri $uri/ =404;
-        #        test something else;
-        #    }
-        # }
 
-      mysite2: # Using source_path options to upload the file instead of templating all the file
+      # Using source_path options to upload the file instead of templating all the file
-        enabled: True
+      mysite2:
+        enabled: true
         available_dir: /etc/nginx/sites-available
         enabled_dir: /etc/nginx/sites-enabled
         config:
-          source_path: salt://path-to-site-file/mysite2 # IMPORTANT: This field is mutually exclusive with TOFS
+          # IMPORTANT: This field is mutually exclusive with TOFS and other
-                                                        # and other config options, it just uploads the specified file
+          # config options, it just uploads the specified file
+          source_path: salt://path-to-site-file/mysite2
 
-      # Below configuration becomes handy if you want to create custom configuration files
+      # Below configuration becomes handy if you want to create custom
-      # for example if you want to create /usr/local/etc/nginx/http_options.conf with
+      # configuration files for example if you want to create
-      # the following content:
+      # /usr/local/etc/nginx/http_options.conf with the following content:
 
       # sendfile on;
       # tcp_nopush on;
@@ -233,7 +266,7 @@ nginx:
       # send_iowait 12000;
 
       http_options.conf:
-        enabled: True
+        enabled: true
         available_dir: /usr/local/etc/nginx
         enabled_dir: /usr/local/etc/nginx
         config:
@@ -242,14 +275,16 @@ nginx:
           - tcp_nodelay: 'on'
           - send_iowait: 12000
 
-  certificates_path: '/etc/nginx/ssl'  # Use this if you need to deploy below certificates in a custom path.
+  # Use this if you need to deploy below certificates in a custom path.
+  certificates_path: '/etc/nginx/ssl'
   # If you're doing SSL termination, you can deploy certificates this way.
   # The private one(s) should go in a separate pillar file not in version
   # control (or use encrypted pillar data).
   certificates:
     'www.example.com':
 
-      # choose one of: deploying this cert by pillar (e.g. in combination with ext_pillar and file_tree)
+      # choose one of: deploying this cert by pillar (e.g. in combination with
+      # ext_pillar and file_tree)
       # public_cert_pillar: certs:example.com:fullchain.pem
       # private_key_pillar: certs:example.com:privkey.pem
       # or directly pasting the cert
@@ -302,7 +337,8 @@ nginx:
     #
     # All aspects of path/file resolution are customisable using the options below.
     # This is unnecessary in most cases; there are sensible defaults.
-    # Path pattern: salt://{{ path_prefix or 'nginx' }}/{{ dirs.files or 'files' }}/{{ dirs.default or 'default' }}
+    # Default path: salt://{{ path_prefix }}/{{ dirs.files }}/{{ dirs.default }}
+    #         I.e.: salt://nginx/files/default
     # path_prefix: template_alt
     # dirs:
     #   files: files_alt

test/integration/default/inspec.yml

@@ -1,3 +1,6 @@
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+---
 name: default
 title: nginx formula
 maintainer: SaltStack Formulas

test/salt/default/pillar/nginx.sls

@@ -1,4 +1,6 @@
-
+# -*- coding: utf-8 -*-
+# vim: ft=yaml
+---
 # Simple pillar setup
 # - snippet letsencrypt
 # - remove 'default' site
@@ -20,12 +22,12 @@ nginx:
   servers:
     managed:
       default:
-        deleted: True
+        deleted: true
-        enabled: False
+        enabled: false
         config: {}
 
       mysite:
-        enabled: True
+        enabled: true
         config:
           - server:
               - server_name: localhost
@@ -35,4 +37,3 @@ nginx:
               - location ~ .htm:
                   - try_files: '$uri $uri/ =404'
               - include: 'snippets/letsencrypt.conf'
-