Added documentation for dry option

- Updated code from the template I used

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Report a problem!
+title: "[BUG]"
+labels: bug
+assignees: ''
+
+---
+
+**What exactly happened?**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**What should've happened?**
+A clear and concise description of what you expected to happen.
+
+**How did it look?**
+If applicable, add screenshots to help explain your problem.
+
+**Where did you encounter the problem?**
+ - OS: [e.g. iOS]
+- Repo: [e.g. URL to your repository]
+ - Version [e.g. 22]
+
+<!-- If you think you can help us with that, please note it here! -->

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,16 @@
+---
+name: Feature request
+about: Request a feature!
+title: "[FEATURE]"
+labels: enhancement
+assignees: ''
+
+---
+
+**What would you like to change about the program?**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Why do you think this is a cool idea?**
+A clear and concise description of why your feature would improve the program.
+
+<!-- If you think you can help us with that, please note it here! -->

.gitignore

@@ -0,0 +1,4 @@
+# MacOS system files
+.DS_Store
+# NPM
+node_modules/

Dockerfile

@@ -1,3 +1,4 @@
-FROM node:latest
+FROM node:lts-alpine3.9
+RUN apk update && apk upgrade && apk add --no-cache bash git openssh
 COPY entrypoint.sh /entrypoint.sh
 ENTRYPOINT ["/entrypoint.sh"]

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2020 Conrad
+Copyright (c) 2020 Conrad Großer
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -14,7 +14,7 @@ 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
+FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 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

README.md

@@ -1,19 +1,80 @@
 # GitHub Prettier Action
 
-A GitHub action for styling files with [prettier](prettier.io).
+[![CodeFactor](https://www.codefactor.io/repository/github/creyd/prettier_action/badge/master)](https://www.codefactor.io/repository/github/creyd/prettier_action/overview/master)
+
+A GitHub action for styling files with [prettier](https://prettier.io).
 
 ## Usage
 
 ### Parameters
 
 | Parameter | Required | Default | Description |
-| - | - | - | - |
-| prettier_options | :white_check_mark: | - | Prettier options |
+| - | :-: | :-: | - |
+| dry | :x: | False | Runs the action in dry mode. Files wont get changed and the action fails if there are unprettified files. |
+| prettier_options | :x: | `--write **/*.js` | Prettier options (by default it applies to the whole repository) |
 | commit_options | :x: | - | Custom git commit options |
-| commit_message | :x: | 'Prettified Code!' | Custom git commit message |
-| file_pattern | :x: | '*' | Custom git add file pattern |
-| branch | :white_check_mark: | - | Custom git publish branch, use ${{ github.head_ref }} if used in pull requests |
+| commit_message | :x: | Prettified Code! | Custom git commit message |
+| file_pattern | :x: | * | Custom git add file pattern |
+| branch | :white_check_mark: | - | There are two types of action triggers in GitHub: on pull request and on push. The branch needs to be defined for both, but in case of the pull request trigger it should have `${{ github.head_ref }}` and on push it should have the branch the trigger is designed for. |
+
+### Example Config
+
+#### Example - On Pull Request
+
+This is a small example of what your `action.yml` could look like (on pull request mode):
+
+```yaml
+name: Prettier for JS Code
+
+on: [pull_request]
+
+jobs:
+  cleanup_tasks:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Cloning the repository
+      uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: Prettify the JS Code
+      uses: creyD/prettier_action@v2.0
+      with:
+        prettier_options: '--no-semi --write *.js'
+        branch: ${{ github.head_ref }}
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+```
+
+#### Example - On Push
+
+```yaml
+name: Prettier for JS Code
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  cleanup_tasks:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Cloning the repository
+      uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: Prettify the JS Code
+      uses: creyD/prettier_action@v2.0
+      with:
+        prettier_options: '--no-semi --write *.js'
+        branch: master
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+```
+
+More documentation for writing a workflow can be found [here](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions).
 
 ## Issues
 
-Please report all bugs and feature request using the [GitHub issues function](https://github.com/creyD/prettier_action/issues/new).
+Please report all bugs and feature request using the [GitHub issues function](https://github.com/creyD/prettier_action/issues/new). Thanks!

action.yml

@@ -1,5 +1,5 @@
-name: 'Prettier Action'
-description: 'Automatically runs prettier on all your pull requests.'
+name: Prettier Action
+description: Automatically runs prettier on all your changes.
 
 author: Conrad Großer <grosserconrad@gmail.com>
 
@@ -12,25 +12,24 @@ inputs:
     description: Commit options
     required: false
   file_pattern:
-    description: File pattern used for "git add"
+    description: File pattern used for `git add`
     required: false
     default: '*'
   prettier_options:
-    description: Options for the 'prettier' command
-    required: true
+    description: Options for the `prettier` command
+    required: false
+    default: '--write **/*.js'
   branch:
-    description: Branch which the changes are merged to
+    description: Target branch for the changes
     required: true
+  dry:
+    description: Running the script in dry mode just shows whether there are files that should be prettified or not
+    required: false
+    default: False
 
 runs:
   using: 'docker'
   image: 'Dockerfile'
-  args:
-    - ${{ inputs.commit_message }}
-    - ${{ inputs.commit_options }}
-    - ${{ inputs.file_pattern }}
-    - ${{ inputs.prettier_options }}
-    - ${{ inputs.branch }}
 
 branding:
   icon: 'award'

entrypoint.sh

@@ -1,41 +1,67 @@
-#!/bin/sh -l
-
+#!/bin/sh
+# e is for exiting the script automatically if a command fails, u is for exiting if a variable is not set
+# x would be for showing the commands before they are executed
 set -eu
 
+# FUNCTIONS
 # Function for setting up git env in the docker container (copied from https://github.com/stefanzweifel/git-auto-commit-action/blob/master/entrypoint.sh)
-git_setup ( ) {
-  cat <<- EOF > $HOME/.netrc
-        machine github.com
-        login $GITHUB_ACTOR
-        password $GITHUB_TOKEN
-        machine api.github.com
-        login $GITHUB_ACTOR
-        password $GITHUB_TOKEN
+_git_setup ( ) {
+    cat <<- EOF > $HOME/.netrc
+      machine github.com
+      login $GITHUB_ACTOR
+      password $GITHUB_TOKEN
+      machine api.github.com
+      login $GITHUB_ACTOR
+      password $GITHUB_TOKEN
 EOF
     chmod 600 $HOME/.netrc
 
     git config --global user.email "actions@github.com"
-    git config --global user.name "GitHub Actions"
+    git config --global user.name "GitHub Action"
 }
-echo "Installing dependencies..."
-npm install
-npm install --global prettier
-echo "Prettifing files..."
-prettier $INPUT_PRETTIER_OPTIONS
 
-if ! git diff --quiet
+# Checks if any files are changed
+_git_changed() {
+    [[ -n "$(git status -s)" ]]
+}
+
+# Pushes to the according upstream (origin or input branch)
+_git_push() {
+    if [ -z "$INPUT_BRANCH" ]
+    then
+        git push origin
+    else
+        git push --set-upstream origin "HEAD:$INPUT_BRANCH"
+    fi
+}
+
+# PROGRAM
+echo "Installing prettier..."
+npm install --silent --global prettier
+
+echo "Prettifing files..."
+echo "Files:"
+prettier $INPUT_PRETTIER_OPTIONS || echo "Problem running prettier with $INPUT_PRETTIER_OPTIONS"
+
+# To keep runtime good, just continue if something was changed
+if _git_changed;
 then
-  echo "Commiting and pushing changes..."
-  # Calling method to configure the git environemnt
-  git_setup
-  # Switch to the actual branch
-  git checkout $INPUT_BRANCH
-  # Add changes to git
-  git add "${INPUT_FILE_PATTERN}"
-  # Commit and push changes back
-  git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"}
-  git push --set-upstream origin "HEAD:$INPUT_BRANCH"
-  echo "Changes pushed successfully."
+  if $INPUT_DRY; then
+    echo "Prettier found unpretty files."
+    exit 1
+  else
+    # Calling method to configure the git environemnt
+    _git_setup
+    echo "Commiting and pushing changes..."
+    # Switch to the actual branch
+    git checkout $INPUT_BRANCH || echo "Problem checking out the specified branch: $INPUT_BRANCH"
+    # Add changes to git
+    git add "${INPUT_FILE_PATTERN}" || echo "Problem adding your files with pattern ${INPUT_FILE_PATTERN}"
+    # Commit and push changes back
+    git commit -m "$INPUT_COMMIT_MESSAGE" --author="$GITHUB_ACTOR <$GITHUB_ACTOR@users.noreply.github.com>" ${INPUT_COMMIT_OPTIONS:+"$INPUT_COMMIT_OPTIONS"}
+    _git_push
+    echo "Changes pushed successfully."
+  fi
 else
   echo "Nothing to commit. Exiting."
 fi