style: add editorconfig file

.editorconfig

@@ -0,0 +1,11 @@
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 2
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true

action.yml

@@ -1,9 +1,9 @@
 # action.yml
-name: 'GitHub Slug'
-description: 'Action to slug and expose some github variables'
+name: "GitHub Slug"
+description: "Action to slug and expose some github variables"
 runs:
-  using: 'docker'
-  image: 'Dockerfile'
+  using: "docker"
+  image: "Dockerfile"
 branding:
-  icon: 'crop'  
-  color: 'orange'
+  icon: "crop"
+  color: "orange"

entrypoint.sh

@@ -1,15 +1,15 @@
 #!/bin/sh -l
 
 slug_ref() {
-    echo "$1" \
-         | tr "[:upper:]" "[:lower:]" \
-         | sed -r 's#refs/[^\/]*/##;s/[~\^]+//g;s/[^a-zA-Z0-9]+/-/g;s/^-+\|-+$//g;s/^-*//;s/-*$//' \
-         | cut -c1-63
+  echo "$1" |
+    tr "[:upper:]" "[:lower:]" |
+    sed -r 's#refs/[^\/]*/##;s/[~\^]+//g;s/[^a-zA-Z0-9]+/-/g;s/^-+\|-+$//g;s/^-*//;s/-*$//' |
+    cut -c1-63
 }
 
-short_sha(){
-  echo "$1" \
-        | cut -c1-8
+short_sha() {
+  echo "$1" |
+    cut -c1-8
 }
 
 echo ::set-env name=GITHUB_REF_SLUG::"$(slug_ref "$GITHUB_REF")"