Add rebar3 formatting (#5)

* Add rebar3 formatting

* Remove old way

* Remove lint warnings

* Actually verify the formatting on CI

* Remove support for OTP 20

* Revert indentation of long lists

* Moving comments until AdRoll/rebar3_format#83 is fixed

.travis.yml

@@ -4,7 +4,6 @@ os:
   - linux
 
 otp_release:
-   - 20.3
    - 21.3
 
 notifications:
@@ -15,6 +14,5 @@ script:
   - export PATH=/home/travis/.cache/rebar3/bin:$PATH
   - rebar3 --version
   - erl -version
+  - rebar3 format --verify
   - rebar3 test
-  - git --no-pager diff
-  - if [[ $(git --no-pager diff) ]]; then echo "Your code is not properly formatted, run rebar3 format on it"; exit 999; fi

elvis.config

@@ -7,14 +7,9 @@
         filter => "*.erl",
         ruleset => erl_files,
         rules => [
-            {elvis_style, line_length, #{limit => 100}},
+            {elvis_style, line_length, #{limit => 120}},
             {elvis_style, nesting_level, #{level => 4}},
-            %% the default rule included {right, ","} and not {right, "=>"} or {left, "=>"}
-            {
-                elvis_style,
-                operator_spaces,
-                #{rules => [{right, "++"}, {left, "++"}, {right, "=>"}, {left, "=>"}]}
-            }
+            {elvis_style, dont_repeat_yourself, #{min_complexity => 15}}
         ]
       },
       #{dirs => ["."],

include/erliam.hrl

@@ -1,9 +1,8 @@
 -type aws_datetime() :: string(). % "YYYYMMDDTHHMMSSZ"
 -type iso_datetime() :: string(). % "YYYY-MM-DDTHH:MM:SSZ"
 
--record(credentials, {
-          expiration        :: undefined | iso_datetime(),
-          security_token    :: undefined | string(), % required when using temporary credentials
-          secret_access_key :: string(),
-          access_key_id     :: string()
-         }).
+-record(credentials,
+        {expiration :: undefined | iso_datetime(),
+         security_token :: undefined | string(), % required when using temporary credentials
+         secret_access_key :: string(),
+         access_key_id :: string()}).

rebar.config

@@ -39,6 +39,8 @@
     deprecated_functions
 ]}.
 
-{alias, [{test, [xref, dialyzer, lint, eunit, cover]}]}.
+{alias, [{test, [format, lint, xref, dialyzer, eunit, cover]}]}.
 
-{plugins, [{rebar3_lint, "0.1.10"}]}.
+{plugins, [rebar3_lint, rebar3_format]}.
+
+{format, [{files, ["src/*.erl", "include/*.hrl"]}]}.