There's no particular need for SourceGraph and definitely no need for 
cabal-dev.  I say try (3). 

On Thu, May 01, 2014 at 12:18:05AM +0200, Robert Weisser wrote: 
> I decided to try out Eclipse with the EclipseFP plug-in for Haskell. 
> I downloaded Eclipse, and then started to install EclipseFP. At 
> some point, I got a screen which said that I needed to install 
> buildwrapper and scion-browser. It offered to install both 
> of them, and optionally install hoogle, hlint, stylish-haskell, 
> SourceGraph, and cabal-dev. The option to install the additional 
> items was pre-checked. I left it checked. The installation of 
> buildwrapper, etc. took a long time. It seemed to be going well 
> until I saw the messages below, which say that installing SourceGraph 
> will likely break several other packages, most of which were part 
> of the EclipseFP installation. 
> 
> I am not a complete novice with Haskell but I am a complete novice 
> with Cabal. I'm not sure what to do. Here are some options I have 
> considered: 
> 
> 1. Use --force-reinstalls and hope for the best. 
> 
> 2. Try to resolve the problem with Cabal, although I don't know to 
> do this. 
> 
> 3. Use EclipseFP without SourceGraph and cabal-dev. 
> 
> 4. Use EclipseFP without SourceGraph, but install cabal-dev using 
> cabal on the command line. 
> 
> 5. Forget about Eclipse altogether, and go back to using vim. 
> 
> Any advice would be appreciated. 
> 
> By the way, I am using Haskell Platform 7.6.3. 
> 
> Here are the messages I saw in the Eclipse console window: 
> 
> <terminated> Installing executable SourceGraph 
> 
> Resolving dependencies... 
> In order, the following would be installed: 
> asn1-types-0.2.3 (new package) 
> asn1-encoding-0.8.1.3 (new package) 
> asn1-parse-0.8.1 (new package) 
> bktrees-0.3.1 (new package) 
> byteable-0.1.1 (new package) 
> cereal-0.4.0.1 (new package) 
> colour-2.3.3 (new package) 
> cpphs-1.18.2 (new version) 
> crypto-pubkey-types-0.4.2.2 (new package) 
> cryptohash-0.11.4 (new package) 
> digest-0.0.1.2 (new package) 
> dlist-0.5 (new version) 
> aeson-0.7.0.3 (reinstall) changes: dlist-0.7.0.1 -> 0.5 
> data-default-instances-dlist-0.0.1 (reinstall) changes: dlist-0.7.0.1 -> 0.5 
> data-default-0.5.3 (reinstall) 
> cookie-0.4.1.1 (new package) 
> haskell-src-exts-1.13.5 (new version) 
> hslua-0.3.12 (new package) 
> mime-types-0.1.0.4 (new package) 
> multiset-0.2.2 (new package) 
> pandoc-types-1.12.3.2 (new package) 
> pem-0.2.2 (new package) 
> polyparse-1.8 (new version) 
> publicsuffixlist-0.1 (new package) 
> http-client-0.3.2 (new package) 
> regex-pcre-builtin-0.94.4.8.8.34 (new package) 
> highlighting-kate-0.5.6.1 (new package) 
> resourcet-0.4.10.2 (new version) 
> securemem-0.1.3 (new package) 
> crypto-cipher-types-0.0.9 (new package) 
> cipher-aes-0.2.7 (new package) 
> cipher-rc4-0.1.4 (new package) 
> crypto-random-0.0.7 (new package) 
> cprng-aes-0.5.2 (new package) 
> crypto-numbers-0.2.3 (new package) 
> crypto-pubkey-0.2.4 (new package) 
> socks-0.5.4 (new package) 
> temporary-1.1.2.5 (new package) 
> text-stream-decode-0.1.0.5 (new package) 
> conduit-1.0.17.1 (new version) 
> http-client-conduit-0.2.0.1 (new package) 
> wl-pprint-text-1.1.0.2 (new package) 
> graphviz-2999.16.0.0 (new package) 
> x509-1.4.11 (new package) 
> x509-store-1.4.4 (new package) 
> x509-system-1.4.5 (new package) 
> x509-validation-1.5.0 (new package) 
> tls-1.2.6 (new package) 
> connection-0.2.1 (new package) 
> http-client-tls-0.2.1.1 (new package) 
> http-conduit-2.0.0.10 (new package) 
> xml-1.3.13 (new package) 
> texmath-0.6.6.1 (new package) 
> yaml-0.8.8.2 (reinstall) changes: conduit-1.1.1 -> 1.0.17.1, resourcet-1.1.2 
> -> 0.4.10.2 
> zip-archive-0.2.2.1 (new package) 
> pandoc-1.12.3.3 (new package) 
> Graphalyze-0.14.0.2 (new package) 
> SourceGraph-0.7.0.5 (new package) 
> cabal: The following packages are likely to be broken by the reinstalls: 
> stylish-haskell-0.5.10.0 
> scion-browser-0.3.1 
> persistent-template-1.3.1.3 
> persistent-sqlite-1.3.0.5 
> persistent-1.3.0.6 
> buildwrapper-0.8.0 
> dynamic-cabal-0.3.1 
> Use --force-reinstalls if you want to install anyway. 

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