Add Travis CI support

The test suite has been slightly modified to allow running tests without
Vagrant on Travis.

.travis.yml

@@ -0,0 +1,10 @@
+language: python
+python:
+  - "2.7"
+  - "3.2"
+  - "3.3"
+  - "3.4"
+  - "3.5"
+
+script:
+  - ./.travis/run_tests

.travis/run_tests

@@ -0,0 +1,75 @@
+#!/usr/bin/env bash
+set -e
+
+# For debug only:
+# export DEBUG=true
+# set -x
+# set -v
+
+BASEDIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+
+# Travis runs do not rely on Vagrant
+export USE_VAGRANT=false
+export DOTBOT_EXEC="${BASEDIR}/bin/dotbot"
+
+cd "${BASEDIR}"
+. "test/driver-lib.bash"
+
+travis_initialize() {
+    echo "initializing."
+    tests_run=0
+    tests_passed=0
+    tests_failed=0
+    tests_total="${1}"
+    local plural="" && [ "${tests_total}" -gt 1 ] && plural="s"
+    printf -- "running %d test%s...\n\n" "${tests_total}" "${plural}"
+}
+
+travis_cleanup() {
+    # Remove all dotfiles installed since the start, ignoring the main
+    # dotfiles directory, and the dotbot source directory
+    find ~ -mindepth 1 -readable -newermt "${date_stamp}" \
+        -not \( -path ~ -o -path "${BASEDIR}/*" \
+                -o -path ~/dotfiles \) \
+        -exec rm -rf {} +
+}
+
+travis_run_test() {
+    tests_run=$((tests_run + 1))
+    printf '[%d/%d] (%s)\n' "${tests_run}" "${tests_total}" "${1}"
+    cd ${BASEDIR}/test/tests
+    if bash ${1} ; then
+        pass
+    else
+        fail
+    fi
+    travis_cleanup || die "unable to clean up system."
+}
+
+date_stamp="$(date --rfc-3339=ns)"
+start="$(date +%s)"
+
+declare -a tests=()
+
+if [ $# -eq 0 ]; then
+    while read file; do
+        tests+=("${file}")
+    done < <(find ${BASEDIR}/test/tests -type f -name '*.bash')
+else
+    tests=("$@")
+fi
+
+travis_initialize "${#tests[@]}"
+
+for file in "${tests[@]}"; do
+    travis_run_test "$(basename "${file}")"
+done
+
+if report; then
+    ret=0
+else
+    ret=1
+fi
+
+echo "(tests run in $(($(date +%s) - start)) seconds)"
+exit ${ret}

README.md

@@ -6,6 +6,8 @@ Dotbot makes installing your dotfiles as easy as `git clone $url && cd dotfiles
 
 ---
 
+[![Build Status](https://travis-ci.org/anishathalye/dotbot.svg?branch=master)](https://travis-ci.org/anishathalye/dotbot)
+
 Dotbot is a tool that bootstraps your dotfiles (it's a [Dot]files
 [bo]o[t]strapper, get it?). It does *less* than you think, because version
 control systems do more than you think.

test/test-lib.bash

@@ -1,5 +1,7 @@
-DEBUG=false
+DEBUG=${DEBUG:-false}
-DOTFILES='/home/vagrant/dotfiles'
+USE_VAGRANT=${USE_VAGRANT:-true}
+DOTBOT_EXEC=${DOTBOT_EXEC:-"/dotbot/bin/dotbot"}
+DOTFILES="/home/$(whoami)/dotfiles"
 INSTALL_CONF='install.conf.yaml'
 INSTALL_CONF_JSON='install.conf.json'
 
@@ -35,7 +37,9 @@ check_vm() {
 }
 
 initialize() {
+    if ${USE_VAGRANT}; then
         check_vm
+    fi
     echo "${test_description}"
     mkdir -p "${DOTFILES}"
     cd
@@ -45,7 +49,7 @@ run_dotbot() {
     (
         cd "${DOTFILES}"
         cat > "${INSTALL_CONF}"
-        /dotbot/bin/dotbot -d . -c "${INSTALL_CONF}" "${@}"
+        ${DOTBOT_EXEC} -d . -c "${INSTALL_CONF}" "${@}"
     )
 }
 
@@ -53,7 +57,7 @@ run_dotbot_json() {
     (
         cd "${DOTFILES}"
         cat > "${INSTALL_CONF_JSON}"
-        /dotbot/bin/dotbot -d . -c "${INSTALL_CONF_JSON}" "${@}"
+        ${DOTBOT_EXEC} -d . -c "${INSTALL_CONF_JSON}" "${@}"
     )
 }