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google-api-objectivec-client + gtm-http-fetcher Duplicate interface definition for class GTMHTTPUploadFetcher #83

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 

1. Add google-api-objectivec-client and gtm-http-fetcher in one project as 
frameworks
2. Try to build

What is the expected output? What do you see instead?

error in GTLService.m:86

// If the upload fetcher class is available, it can be used for chunked uploads
//
// We locally declare some methods of the upload fetcher so we
// do not need to import the header, as some projects may not have it available
@interface GTLUploadFetcherClass : GTMBridgeFetcher

Error: Duplicate interface definition for class GTMHTTPUploadFetcher

This is because after preprocess it has

@interface GTMHTTPUploadFetcher : GTMHTTPFetcher in GTMHTTPUploadFetcher.h:45 

and

@interface GTMHTTPUploadFetcher : GTMHTTPFetcher in GTLService.m:86

To forward declare interface and some methods it should just implement some 
private category like this:

@interface GTLUploadFetcherClass  (somePrivateCatogory) in GTLService.m:86
...

Anyway it should be imported (as module) in .m to allow compiler to see forward 
declaration

So require to use 

#if GTL_USE_SESSION_FETCHER
#import "GTMSessionUploadFetcher.h"
#else
#import "GTMHTTPUploadFetcher.h"
#endif

instead of 

// If the upload fetcher class is available, it can be used for chunked uploads
//
// We locally declare some methods of the upload fetcher so we
// do not need to import the header, as some projects may not have it available
@interface GTLUploadFetcherClass : GTMBridgeFetcher
...

Original issue reported on code.google.com by serg.f...@gmail.com on 4 Mar 2015 at 2:34

Attachments:

GoogleCodeExporter commented 9 years ago 
I'm also seeing this issue, which seems pretty important since to use Swift 
with Cocoapods, you need to import as frameworks.  

http://blog.cocoapods.org/CocoaPods-0.36/

Original comment by joeboysc...@gmail.com on 6 Jul 2015 at 3:50

GoogleCodeExporter commented 9 years ago 
I am seeing the same issue here. In order to resolve it, I had to comment out 
re-declaration code and fully qualify GTMHTTP* imports from framework, like 
this:

#if GTL_USE_SESSION_FETCHER
  // ...
#else
  // ...
  #import <gtm_http_fetcher/GTMHTTPFetcher.h>
  #import <gtm_http_fetcher/GTMHTTPUploadFetcher.h>
  #import <gtm_http_fetcher/GTMHTTPFetcherService.h> 
#endif

Original comment by mzara...@gmail.com on 29 Jul 2015 at 3:35

GoogleCodeExporter commented 9 years ago 
GTMHTTPFetcher won't work for builds targeting iOS 9/OS X 10.11 and up. If your 
minimum target is below iOS 9/OS X 10.11, you can set the target to build with 
GTM_USE_SESSION_FETCHER=0

The library can be built with the newer fetcher class as well; that's available 
at https://code.google.com/p/gtm-session-fetcher/

This unfortunate mess will be cleaned up as we migrate the project away from 
Google Code in upcoming weeks.

Original comment by grobb...@google.com on 29 Jul 2015 at 9:45