Move some logic into the Makefile

This should provide a nice compromise between the scripts and comon
commands.

Makefile

@@ -0,0 +1,15 @@
+default: test
+
+build-libgit2:
+	./script/build-libgit2-static.sh
+
+update-libgit2:
+	cd vendor/libgit2 && \
+	git fetch origin development && \
+	git checkout -qf FETCH_HEAD
+
+test: build-libgit2
+	./script/with-static.sh go test ./...
+
+install: build-libgit2
+	./script/with-static.sh go install ./...

script/build-libgit2-static.sh

@@ -2,21 +2,19 @@
 
 set -ex
 
+VENDORED_PATH=vendor/libgit2
+
 # Make sure we have the latest libgit2
-if [ -d libgit2 ]; then
-    cd libgit2
-    git fetch origin development
-    git checkout FETCH_HEAD
-    cd ..
-else
-    git clone --depth 1 --single-branch git://github.com/libgit2/libgit2 libgit2
+if [ ! -d $VENDORED_PATH ]; then
+    git clone --depth 1 --single-branch git://github.com/libgit2/libgit2 $VENDORED_PATH
 fi
 
-cd libgit2
+cd $VENDORED_PATH
+
 cmake -DTHREADSAFE=ON \
       -DBUILD_CLAR=OFF \
       -DBUILD_SHARED_LIBS=OFF \
-      -DCMAKE_INSTALL_PREFIX=$PWD/install \
+      -DCMAKE_INSTALL_PREFIX=../install \
       .
 
 make install

script/build-libgit2.sh

@@ -1,13 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-git clone --depth 1 --single-branch git://github.com/libgit2/libgit2 libgit2
-
-cd libgit2
-cmake -DTHREADSAFE=ON \
-      -DBUILD_CLAR=OFF \
-      -DCMAKE_INSTALL_PREFIX=$PWD/install \
-      .
-
-make install

script/with-static.sh

@@ -2,9 +2,7 @@
 
 set -ex
 
-export LIBGIT2_LOCATION=$PWD/libgit2/install
-export PKG_CONFIG_PATH=$LIBGIT2_LOCATION/lib/pkgconfig
-export LIBGIT2_A=$LIBGIT2_LOCATION/lib/libgit2.a
-export CGO_LDFLAGS="$LIBGIT2_A $(pkg-config --static --libs libgit2)"
+export INSTALL_LOCATION=$PWD/vendor/install
+export PKG_CONFIG_PATH=$INSTALL_LOCATION/lib/pkgconfig
 
 $@