Update building stuff

- Add a Makefile with common targets (binary, test, validate, ..)
- Use docker to build it (isolated)

And update circleci to work with the new Makefile..

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

script/.validate

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+if [ -z "$VALIDATE_UPSTREAM" ]; then
+	# this is kind of an expensive check, so let's not do this twice if we
+	# are running more than one validate bundlescript
+	
+	VALIDATE_REPO='https://github.com/emilevauge/traefik.git'
+	VALIDATE_BRANCH='master'
+	
+	if [ "$TRAVIS" = 'true' -a "$TRAVIS_PULL_REQUEST" != 'false' ]; then
+		VALIDATE_REPO="https://github.com/${TRAVIS_REPO_SLUG}.git"
+		VALIDATE_BRANCH="${TRAVIS_BRANCH}"
+	fi
+	
+	VALIDATE_HEAD="$(git rev-parse --verify HEAD)"
+	
+	git fetch -q "$VALIDATE_REPO" "refs/heads/$VALIDATE_BRANCH"
+	VALIDATE_UPSTREAM="$(git rev-parse --verify FETCH_HEAD)"
+	
+	VALIDATE_COMMIT_LOG="$VALIDATE_UPSTREAM..$VALIDATE_HEAD"
+	VALIDATE_COMMIT_DIFF="$VALIDATE_UPSTREAM...$VALIDATE_HEAD"
+	
+	validate_diff() {
+		if [ "$VALIDATE_UPSTREAM" != "$VALIDATE_HEAD" ]; then
+			git diff "$VALIDATE_COMMIT_DIFF" "$@"
+		fi
+	}
+	validate_log() {
+		if [ "$VALIDATE_UPSTREAM" != "$VALIDATE_HEAD" ]; then
+			git log "$VALIDATE_COMMIT_LOG" "$@"
+		fi
+	}
+fi

script/binary

@@ -0,0 +1,28 @@
+#!/bin/bash
+set -e
+
+if ! test -e gen.go; then
+	echo >&2 'error: generate must be run before binary'
+	false
+fi
+
+if [ -z "$1" ]; then
+    OS_PLATFORM_ARG=(-os="darwin linux windows")
+else
+    OS_PLATFORM_ARG=($1)
+fi
+
+if [ -z "$2" ]; then
+    OS_ARCH_ARG=(-arch="386 amd64 arm")
+else
+    OS_ARCH_ARG=($2)
+fi
+
+# Get rid of existing binaries
+rm -f dist/traefik*
+
+# Build binaries
+CGO_ENABLED=0 go build -a -installsuffix nocgo .
+gox "${OS_PLATFORM_ARG[@]}" "${OS_ARCH_ARG[@]}" \
+    -output="dist/traefik_{{.OS}}-{{.Arch}}"
+

script/generate

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+go generate

script/make.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+set -e
+
+# List of bundles to create when no argument is passed
+DEFAULT_BUNDLES=(
+	validate-gofmt
+	binary
+
+	test-unit
+	test-integration
+)
+
+bundle() {
+    local bundle="$1"; shift
+    echo "---> Making bundle: $(basename "$bundle") (in $DEST)"
+    source "script/$bundle" "$@"
+}
+
+if [ $# -lt 1 ]; then
+    bundles=(${DEFAULT_BUNDLES[@]})
+else
+    bundles=($@)
+fi
+for bundle in ${bundles[@]}; do
+    export DEST=.
+    ABS_DEST="$(cd "$DEST" && pwd -P)"
+    bundle "$bundle"
+    echo
+done

script/test-integration

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+export SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+export DEST=.
+
+TESTFLAGS="$TESTFLAGS"
+#go test -v ./integration
+

script/test-unit

@@ -0,0 +1,56 @@
+#!/bin/bash
+set -e
+
+if ! test -e gen.go; then
+	echo >&2 'error: generate must be run before binary'
+	false
+fi
+
+RED=$'\033[31m'
+GREEN=$'\033[32m'
+TEXTRESET=$'\033[0m' # reset the foreground colour
+
+# This helper function walks the current directory looking for directories
+# holding certain files ($1 parameter), and prints their paths on standard
+# output, one per line.
+find_dirs() {
+    find . -not \( \
+         \( \
+         -path './integration/*' \
+         -o -path './.git/*' \
+         \) \
+         -prune \
+         \) -name "$1" -print0 | xargs -0n1 dirname | sort -u
+}
+
+TESTFLAGS="-cover -coverprofile=cover.out ${TESTFLAGS}"
+
+if [ -z "$TESTDIRS" ]; then
+    TESTDIRS=$(find_dirs '*_test.go')
+fi
+
+TESTS_FAILED=()
+
+for dir in $TESTDIRS; do
+    echo '+ go test' $TESTFLAGS "${dir}"
+    go test ${TESTFLAGS} ${dir}
+    if [ $? != 0 ]; then
+        TESTS_FAILED+=("$dir")
+        echo
+        echo "${RED}Tests failed: $dir${TEXTRESET}"
+        sleep 1 # give it a second, so observers watching can take note
+    fi
+done
+echo
+
+# if some tests fail, we want the bundlescript to fail, but we want to
+# try running ALL the tests first, hence TESTS_FAILED
+if [ "${#TESTS_FAILED[@]}" -gt 0 ]; then
+    echo "${RED}Test failures in: ${TESTS_FAILED[@]}${TEXTRESET}"
+    echo
+    false
+else
+    echo "${GREEN}Test success${TEXTRESET}"
+    echo
+    true
+fi

script/validate-gofmt

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+source "$(dirname "$BASH_SOURCE")/.validate"
+
+IFS=$'\n'
+files=( $(validate_diff --diff-filter=ACMR --name-only -- '*.go' || true) )
+unset IFS
+
+badFiles=()
+for f in "${files[@]}"; do
+	# we use "git show" here to validate that what's committed is formatted
+	if [ "$(git show "$VALIDATE_HEAD:$f" | gofmt -s -l)" ]; then
+		badFiles+=( "$f" )
+	fi
+done
+
+if [ ${#badFiles[@]} -eq 0 ]; then
+	echo 'Congratulations!  All Go source files are properly formatted.'
+else
+	{
+		echo "These files are not properly gofmt'd:"
+		for f in "${badFiles[@]}"; do
+			echo " - $f"
+		done
+		echo
+		echo 'Please reformat the above files using "gofmt -s -w" and commit the result.'
+		echo
+	} >&2
+	false
+fi