Add travis build configuration

Author: mistzzt

.travis.yml

@@ -0,0 +1,40 @@
+language: java
+
+jdk:
+  - oraclejdk8
+
+  # see https://github.com/travis-ci/travis-ci/issues/8408
+before_install:
+  - unset _JAVA_OPTIONS
+  - git clone https://github.com/google/google-java-format.git
+  - cd google-java-format
+  - patch ./core/src/main/java/com/google/googlejavaformat/java/JavaFormatterOptions.java < ../patches/line.patch
+
+# use travis-ci docker based infrastructure
+sudo: false
+
+cache:
+  directories:
+    - $HOME/.m2
+
+install: mvn install -DskipTests=true -V
+
+script: cp ./core/target/google-java-format-*-all-deps.jar ../bin/google-java-format.jar
+
+after_success:
+  - cd ..
+  - mkdir release
+  - cp palint.py release/
+  - cp -r bin release/
+  - cd release
+  - wget https://sourceforge.net/projects/checkstyle/files/latest/download
+  - mv download bin/checkstyle.jar
+  - zip -r release.zip .
+
+deploy:
+  provider: releases
+  api-key: $GITHUB_TOKEN
+  file: release.zip
+  skip_cleanup: true
+  on:
+    tags: true

README.md

@@ -1,2 +1,4 @@
-# cse-pa-lint
+# cse-pa-lint [![Build Status](https://travis-ci.org/mistzzt/cse-pa-lint.svg)][travis]
 Detecting possible style in-correction in programming assignments
+
+[travis]: <https://travis-ci.org/mistzzt/cse-pa-lint>

palint.py

@@ -12,9 +12,9 @@
 
 HOME = os.path.expanduser('~/')
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
-CHECKSTYLE_PATH = os.path.join(SCRIPT_DIR, 'bin', 'checkstyle-8.3-all.jar')
+CHECKSTYLE_PATH = os.path.join(SCRIPT_DIR, 'bin', 'checkstyle.jar')
 STYLE_CONFIG_PATH = os.path.join(SCRIPT_DIR, 'bin', 'google_checks.xml')
-FORMATTER_PATH = os.path.join(SCRIPT_DIR, 'bin', 'google-java-format-1.6-SNAPSHOT-CSE11-all-deps.jar')
+FORMATTER_PATH = os.path.join(SCRIPT_DIR, 'bin', 'google-java-format.jar')
 
 CONFIG_FILE_NAME = 'config.json'
 COMPILE_ERROR_FILE_NAME = 'compile_error.log'

patches/line.patch

@@ -0,0 +1,11 @@
+--- JavaFormatterOptions.java	2017-10-29 21:23:59.057733900 -0700
++++ Modified.java	2017-10-29 21:33:17.479177900 -0700
+@@ -29,7 +29,7 @@
+ @Immutable
+ public class JavaFormatterOptions {
+ 
+-  static final int DEFAULT_MAX_LINE_LENGTH = 100;
++  static final int DEFAULT_MAX_LINE_LENGTH = 80;
+ 
+   public enum Style {
+