From 648578c5a4ffd99074e7211ec5c395b39d6c280a Mon Sep 17 00:00:00 2001
From: harukasan <harukasan@pixiv.com>
Date: Fri, 9 Jan 2015 14:49:51 +0900
Subject: [PATCH 1/4] Fix package name in .travis.yml

---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index f82aea2..baee10a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,4 +6,4 @@ go:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libwebp
+  - sudo apt-get install -qq libwebp-dev

From 8628328a9e99edd7ecdc5c796832139ed0fde224 Mon Sep 17 00:00:00 2001
From: harukasan <harukasan@pixiv.com>
Date: Fri, 9 Jan 2015 16:53:11 +0900
Subject: [PATCH 2/4] Build libwebp instead of using apt package

libwebp-dev package is too old, because travis-ci VMs are based on
Ubuntu 12.04. go-libwebp supports libwebp 4.0 or later.
---
 .travis.yml | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index baee10a..59e16ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,4 +6,14 @@ go:
 
 before_install:
   - sudo apt-get update -qq
-  - sudo apt-get install -qq libwebp-dev
+  - sudo apt-get install -qq libjpeg-dev libpng-dev libtiff-dev libgif-dev
+  - > 
+      cd /tmp
+      && wget http://downloads.webmproject.org/releases/webp/libwebp-0.4.2.tar.gz
+      && tar xf libwebp-0.4.2.tar.gz
+      && cd libwebp-0.4.2
+      && ./configure
+      && make
+      && sudo make install
+  - cd $HOME/gopath/src/github.com/harukasan/go-libwebp
+  - export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH

From 0b88ea9dc720d206be75b3bcd8bcc0b48bac7537 Mon Sep 17 00:00:00 2001
From: harukasan <harukasan@pixiv.com>
Date: Fri, 9 Jan 2015 16:55:34 +0900
Subject: [PATCH 3/4] Try to find example files in multiple directories which
 contains $GOPATH.

Bacause $GOPATH supports multiple directories splitted by ":" like $PATH.
---
 test/util/util.go | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/test/util/util.go b/test/util/util.go
index 2dc2398..c284b75 100644
--- a/test/util/util.go
+++ b/test/util/util.go
@@ -3,22 +3,36 @@ package util
 
 import (
 	"bufio"
+	"fmt"
 	"image"
 	"image/png"
 	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"strings"
 )
 
 // GetExFilePath returns the path of specified example file.
 func GetExFilePath(name string) string {
-	return filepath.Join(os.Getenv("GOPATH"), "src/github.com/harukasan/go-libwebp/examples/images", name)
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/images", name)
+		if _, err := os.Stat(path); err == nil {
+			return path
+		}
+	}
+	panic(fmt.Errorf("%v does not exist in any directory which contains in $GOPATH", name))
 }
 
 // GetOutFilePath returns the path of specified out file.
 func GetOutFilePath(name string) string {
-	return filepath.Join(os.Getenv("GOPATH"), "src/github.com/harukasan/go-libwebp/examples/out", name)
+	for _, gopath := range strings.Split(os.Getenv("GOPATH"), ":") {
+		path := filepath.Join(gopath, "src/github.com/harukasan/go-libwebp/examples/out")
+		if _, err := os.Stat(path); err == nil {
+			return filepath.Join(path, name)
+		}
+	}
+	panic(fmt.Errorf("out directory does not exist in any directory which contains in $GOPATH"))
 }
 
 // OpenFile opens specified example file

From 786042c4d9dd92c18df17aa34ff73a4206c14cba Mon Sep 17 00:00:00 2001
From: harukasan <harukasan@pixiv.com>
Date: Fri, 9 Jan 2015 17:04:24 +0900
Subject: [PATCH 4/4] Run tests of each libwebp versions.

---
 .travis.yml | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 59e16ce..8777fe2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,14 +4,18 @@ go:
   - 1.3
   - 1.4
 
+env:
+  - LIBWEBP_VERSION="0.4.1"
+  - LIBWEBP_VERSION="0.4.2"
+
 before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -qq libjpeg-dev libpng-dev libtiff-dev libgif-dev
   - > 
       cd /tmp
-      && wget http://downloads.webmproject.org/releases/webp/libwebp-0.4.2.tar.gz
-      && tar xf libwebp-0.4.2.tar.gz
-      && cd libwebp-0.4.2
+      && wget http://downloads.webmproject.org/releases/webp/libwebp-${LIBWEBP_VERSION}.tar.gz
+      && tar xf libwebp-${LIBWEBP_VERSION}.tar.gz
+      && cd libwebp-${LIBWEBP_VERSION}
       && ./configure
       && make
       && sudo make install