Add check-and-run-apollo-codegen script

Apollo.podspec

@@ -15,4 +15,5 @@ Pod::Spec.new do |s|
   s.ios.deployment_target = '8.0'
 
   s.source_files = 'Apollo/**/*.swift'
+  s.resource = 'scripts/*'
 end

Apollo.xcodeproj/project.pbxproj

@@ -25,6 +25,7 @@
 		9FC750541D2A532D00458D91 /* ParseQueryResultDataTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9FC750531D2A532D00458D91 /* ParseQueryResultDataTests.swift */; };
 		9FC750611D2A59C300458D91 /* GraphQL.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9FC750601D2A59C300458D91 /* GraphQL.swift */; };
 		9FC750631D2A59F600458D91 /* ApolloClient.swift in Sources */ = {isa = PBXBuildFile; fileRef = 9FC750621D2A59F600458D91 /* ApolloClient.swift */; };
+		9FE3F3981DADBD870072078F /* check-and-run-apollo-codegen.sh in Resources */ = {isa = PBXBuildFile; fileRef = 9FE3F3971DADBD870072078F /* check-and-run-apollo-codegen.sh */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -59,6 +60,7 @@
 		9FC750551D2A532D00458D91 /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		9FC750601D2A59C300458D91 /* GraphQL.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GraphQL.swift; sourceTree = "<group>"; };
 		9FC750621D2A59F600458D91 /* ApolloClient.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ApolloClient.swift; sourceTree = "<group>"; };
+		9FE3F3971DADBD870072078F /* check-and-run-apollo-codegen.sh */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.script.sh; name = "check-and-run-apollo-codegen.sh"; path = "scripts/check-and-run-apollo-codegen.sh"; sourceTree = SOURCE_ROOT; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -132,6 +134,7 @@
 		9FC750461D2A532C00458D91 /* Apollo */ = {
 			isa = PBXGroup;
 			children = (
+				9FE3F3961DADBD0D0072078F /* Supporting Files */,
 				9FC750621D2A59F600458D91 /* ApolloClient.swift */,
 				9F69FFA81D42855900E000B1 /* NetworkTransport.swift */,
 				9F578D8F1D8D2CB300C0EA36 /* Utilities.swift */,
@@ -155,6 +158,14 @@
 			path = ApolloTests;
 			sourceTree = "<group>";
 		};
+		9FE3F3961DADBD0D0072078F /* Supporting Files */ = {
+			isa = PBXGroup;
+			children = (
+				9FE3F3971DADBD870072078F /* check-and-run-apollo-codegen.sh */,
+			);
+			name = "Supporting Files";
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXHeadersBuildPhase section */
@@ -254,6 +265,7 @@
 			isa = PBXResourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				9FE3F3981DADBD870072078F /* check-and-run-apollo-codegen.sh in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};

scripts/check-and-run-apollo-codegen.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+REQUIRED_APOLLO_CODEGEN_VERSION=0.6
+
+# Part of this code has been adapted from https://github.com/facebook/react-native/blob/master/packager/react-native-xcode.sh
+
+# This script is supposed to be invoked as part of the Xcode build process
+# and relies on environment variables set by Xcode
+
+if [[ -z "$CONFIGURATION" ]]; then
+    echo "$0 must be invoked as part of an Xcode script phase"
+    exit 1
+fi
+
+# Define NVM_DIR and source the nvm.sh setup script
+[[ -z "$NVM_DIR" ]] && export NVM_DIR="$HOME/.nvm"
+
+if [[ -s "$HOME/.nvm/nvm.sh" ]]; then
+  . "$HOME/.nvm/nvm.sh"
+elif [[ -x "$(command -v brew)" && -s "$(brew --prefix nvm)/nvm.sh" ]]; then
+  . "$(brew --prefix nvm)/nvm.sh"
+fi
+
+# Set up the nodenv node version manager if present
+if [[ -x "$HOME/.nodenv/bin/nodenv" ]]; then
+  eval "$("$HOME/.nodenv/bin/nodenv" init -)"
+fi
+
+if ! type "apollo-codegen" >/dev/null 2>&1; then
+  echo "error: Can't find apollo-codegen command; make sure to run 'npm install -g apollo-codegen' first."
+  exit 1
+fi
+
+# We consider versions to be compatible if the major and minor versions match
+are_versions_compatible() {
+  [[ "$(cut -d. -f1-2 <<< $1)" == "$(cut -d. -f1-2 <<< $2)" ]]
+}
+
+INSTALLED_APOLLO_CODEGEN_VERSION=$(apollo-codegen --version) || "an unknown older version"
+
+if ! are_versions_compatible $INSTALLED_APOLLO_CODEGEN_VERSION $REQUIRED_APOLLO_CODEGEN_VERSION; then
+  echo "error: The version of Apollo.framework in your project requires the use of version $REQUIRED_APOLLO_CODEGEN_VERSION of apollo-codegen, \
+but $INSTALLED_APOLLO_CODEGEN_VERSION seems to be installed."
+  exit 1
+fi
+
+# Print commands before executing them (useful for troubleshooting)
+set -x
+
+$(apollo-codegen "$@")