Difference between revisions of "PkgEnv"

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== PkgEnv ==
 
 
=== Session Example ===
 
 
We start creating a new package environment:
 
 
<pre>
 
hypermac:trash paolo$ pkgenv binary.env
 
Using GHC 6.10.1 (full path: /opt/local/bin/ghc-6.10.1)
 
Using cabal-install 0.6.2 (full path: /Users/paolo/.cabal/bin/cabal)
 
Installing package environment in /Users/paolo/trash/binary.env.
 
Done!
 
 
Usage:
 
 
bash> source /Users/paolo/trash/binary.env/bin/activate
 
(binary.env)bash> deactivate
 
bash>
 
hypermac:trash paolo$
 
</pre>
 
 
We activate the new environment (the bash prompt is changed accordingly):
 
 
<pre>
 
hypermac:trash paolo$ source binary.env/bin/activate
 
(binary.env)hypermac:trash paolo$
 
</pre>
 
 
All tools run now by default on the system package DB and the
 
newly created/empty user package DB:
 
 
<pre>
 
(binary.env)hypermac:trash paolo$ ghc-pkg list
 
/opt/local/lib/ghc-6.10.1/./package.conf:
 
Cabal-1.6.0.1, HUnit-1.2.0.3, QuickCheck-1.2.0.0, array-0.2.0.0,
 
base-3.0.3.0, base-4.0.0.0, bytestring-0.9.1.4, containers-0.2.0.0,
 
directory-1.0.0.2, (dph-base-0.3), (dph-par-0.3),
 
(dph-prim-interface-0.3), (dph-prim-par-0.3), (dph-prim-seq-0.3),
 
(dph-seq-0.3), editline-0.2.1.0, filepath-1.1.0.1, (ghc-6.10.1),
 
ghc-prim-0.1.0.0, haddock-2.3.0, haskell-src-1.0.1.3,
 
haskell98-1.0.1.0, hpc-0.5.0.2, html-1.0.1.2, integer-0.1.0.0,
 
mtl-1.1.0.2, network-2.2.0.1, old-locale-1.0.0.1, old-time-1.0.0.1,
 
packedstring-0.1.0.1, parallel-1.1.0.0, parsec-2.1.0.1,
 
pretty-1.0.1.0, process-1.0.1.0, random-1.0.0.1,
 
regex-base-0.72.0.2, regex-compat-0.71.0.1, regex-posix-0.72.0.3,
 
rts-1.0, stm-2.1.1.2, syb-0.1.0.0, template-haskell-2.3.0.0,
 
time-1.1.2.2, unix-2.3.1.0, xhtml-3000.2.0.1
 
/Users/paolo/trash/binary.env/ghc-packages.conf:
 
</pre>
 
 
Let's install a package inside the new environment:
 
 
<pre>
 
(binary.env)hypermac:trash paolo$ cabal install --verbose=0 binary
 
Reading package info from "dist/installed-pkg-config" ... done.
 
Writing new package config file... done.
 
(binary.env)hypermac:trash paolo$ ghc-pkg list
 
/opt/local/lib/ghc-6.10.1/./package.conf:
 
Cabal-1.6.0.1, HUnit-1.2.0.3, QuickCheck-1.2.0.0, array-0.2.0.0,
 
base-3.0.3.0, base-4.0.0.0, bytestring-0.9.1.4, containers-0.2.0.0,
 
directory-1.0.0.2, (dph-base-0.3), (dph-par-0.3),
 
(dph-prim-interface-0.3), (dph-prim-par-0.3), (dph-prim-seq-0.3),
 
(dph-seq-0.3), editline-0.2.1.0, filepath-1.1.0.1, (ghc-6.10.1),
 
ghc-prim-0.1.0.0, haddock-2.3.0, haskell-src-1.0.1.3,
 
haskell98-1.0.1.0, hpc-0.5.0.2, html-1.0.1.2, integer-0.1.0.0,
 
mtl-1.1.0.2, network-2.2.0.1, old-locale-1.0.0.1, old-time-1.0.0.1,
 
packedstring-0.1.0.1, parallel-1.1.0.0, parsec-2.1.0.1,
 
pretty-1.0.1.0, process-1.0.1.0, random-1.0.0.1,
 
regex-base-0.72.0.2, regex-compat-0.71.0.1, regex-posix-0.72.0.3,
 
rts-1.0, stm-2.1.1.2, syb-0.1.0.0, template-haskell-2.3.0.0,
 
time-1.1.2.2, unix-2.3.1.0, xhtml-3000.2.0.1
 
/Users/paolo/trash/binary.env/ghc-packages.conf:
 
binary-0.4.4
 
</pre>
 
 
We can now use the new package:
 
 
<pre>
 
(binary.env)hypermac:trash paolo$ ghci
 
GHCi, version 6.10.1: http://www.haskell.org/ghc/ :? for help
 
Loading package ghc-prim ... linking ... done.
 
Loading package integer ... linking ... done.
 
Loading package base ... linking ... done.
 
Prelude> import Data.Binary
 
Prelude Data.Binary>
 
</pre>
 
 
and leave the environment:
 
 
<pre>
 
(binary.env)hypermac:trash paolo$ deactivate
 
hypermac:trash paolo$
 
</pre>
 
 
and when you're done with the environment, simply remove it:
 
 
<pre>
 
hypermac:trash paolo$ rm -rf binary.env
 
</pre>
 

Revision as of 14:58, 6 February 2021