build: Arch Linux PKGBUILD (#120)

Fixes #115 

Changes proposed in this pull request:
- Add Arch Linux PKGBUILD

installers/PKGBUILD

@@ -0,0 +1,35 @@
+# Maintainer: Samim Mirhosseini <samim@ottomatica.io>
+pkgname="baker"
+pkgver=0.7.0
+pkgrel=1
+pkgdesc="Quick and easy baking of computing environments."
+arch=('x86_64')
+url="https://github.com/ottomatica/Baker"
+license=('Apache')
+provides=('baker')
+makedepends=('npm' 'jq' 'python2')
+optdepends=('virtualbox: virtual machine support')
+source=($pkgname-$pkgver.tar.gz::https://github.com/ottomatica/Baker/archive/v$pkgver.tar.gz)
+md5sums=('63a02cc6837a64b917558c763dff1341')
+
+package() {
+    npm install -g \
+        --user root \
+        --prefix "$pkgdir"/usr \
+        --cache "${srcdir}/npm-cache" \
+        "$srcdir"/$pkgname-$pkgver.tar.gz
+
+    # Non-deterministic race in npm gives 777 permissions to random directories.
+	# See https://github.com/npm/npm/issues/9359 for details.
+	find "${pkgdir}"/usr -type d -exec chmod 755 {} +
+
+    # Remove dependency references to $pkgdir
+    find "$pkgdir" -name package.json -print0 | xargs -0 sed -i '/_where/d'
+
+    # Remove package references to $pkgdir
+    local tmppackage="$(mktemp)"
+    local pkgjson="$pkgdir/usr/lib/node_modules/$pkgname/package.json"
+    jq '.|=with_entries(select(.key|test("_.+")|not))' "$pkgjson" > "$tmppackage"
+    mv "$tmppackage" "$pkgjson"
+    chmod 644 "$pkgjson"
+}

installers/build-installer.sh

@@ -21,6 +21,9 @@ sed -i "" -e "s/Version: .*/Version: ${BAKER_RELEASE}/" "linux/deb-template/bake
 echo "Updating AppVersion in win/scripts/baker.iss to be $BAKER_RELEASE";
 sed -i "" -e "s/AppVersion=.*/AppVersion=${BAKER_RELEASE}/" "win/scripts/baker.iss"
 
+echo "Updating pkgver in PKGBUILD to be $BAKER_RELEASE";
+sed -i "" -e "s/^pkgver=.*$/pkgver=${BAKER_RELEASE}/" "PKGBUILD"
+
 # clean any old files
 rm -f macos/bin/*
 
@@ -50,6 +53,7 @@ echo "Version: ${BAKER_RELEASE}"
 
 echo "You are not done, yet"
 echo "You need to upload the .tar.gz, .pkg, and .deb on github."
+echo "You also need to update the md5sums field in PKGBUILD to the md5 sum of the source .tar.gz."
 echo "Then you need to switch to a windows machine and run 'grunt'"
 echo "Then you need to rename win/bin/baker-setup.exe to baker-windows-latest.exe and upload too"
 echo "Finally, you need to update the sha to $SHA and VERSION to ${BAKER_RELEASE} in ottomatica/homebrew"