ios – Cocoapods“pod update”安装旧pod

export LANG=en_US.UTF-8
#!/bin/bash
cd "$XCS_SOURCE_DIR/{PROJECTNAME}"
if [ -e "Pods" ]
then
/usr/local/bin/pod update
else
/usr/local/bin/pod install
fi

当前版本的CocoaPods 0.39.0安装在服务器上.当我在服务器上运行“pod update”时,一切都是正常的,最新的pod被安装.

Using FBAudienceNetwork (4.7.0)
Using FBSDKCoreKit (4.8.0)
Using Fabric (1.6.1)
Using FyberSDK (8.1.2)
Using Google-Mobile-Ads-SDK (7.6.0)
Using GoogleAnalytics (3.14.0)

当我使用上面的脚本,但奇怪的是发生.

Installing FBAudienceNetwork (4.1.0)
Installing FBSDKCoreKit (4.4.0)
Installing Fabric (1.2.8)
Installing FyberSDK (7.2.4)
Installing Google-Mobile-Ads-SDK (7.3.1)
Installing GoogleAnalytics (3.13.0)

任何人都知道为什么旧版本与脚本一起安装？我使用OS X Server 5.0.15和Xcode 7.2.

podfile：

source 'https://github.com/CocoaPods/Specs.git'

platform :ios,"8.0"
use_frameworks!

target "{PROJECTNAME}" do
    inhibit_all_warnings!

    pod 'AFNetworking'
    pod 'Branch'
    pod 'SwrveSDK'
    pod 'RealmSwift'
    pod 'MZTimerLabel'
    pod 'pop' 
    pod 'Adjust'
    pod 'JSQMessagesViewController'
    pod 'Fabric'
    pod 'Crashlytics'
    pod 'GoogleAnalytics'
    pod 'FBSDKCoreKit'
    pod 'FyberSDK'
    pod 'adcolony'
    pod 'Google-Mobile-Ads-SDK'
    pod 'ChartboostSDK'
    pod 'FBAudienceNetwork'
    pod 'VungleSDK-iOS'
end

target "{PROJECTNAME}Tests" do
    inhibit_all_warnings!

    pod 'AFNetworking'
    pod 'Branch'
    pod 'SwrveSDK'
    pod 'RealmSwift'
    pod 'MZTimerLabel'
    pod 'pop'
    pod 'Adjust'
    pod 'JSQMessagesViewController'
    pod 'Fabric'
    pod 'Crashlytics'
    pod 'GoogleAnalytics'
    pod 'FBSDKCoreKit'
    pod 'FyberSDK'
    pod 'adcolony'
    pod 'Google-Mobile-Ads-SDK'
    pod 'ChartboostSDK'
    pod 'FBAudienceNetwork'
end

post_install do |installer|
    installer.pods_project.targets.each do |target|
        target.build_configurations.each do |config|
            config.build_settings['ENABLE_BITCODE'] = 'NO'
        end
    end
end