On Wednesday, August 17, 2016 at 12:01:31 PM UTC-4, Jan Hlavacek wrote: > > I am working on a system that has a number of packages installed system > wide in /usr/local/share/julia/site/. The problem is, when trying to load > a package, Julia tries to recompile it, and cannot do so since > /usr/local/share/julia/site/lib/v0.4/ > is not writable. >
Just make sure your system-wide cache-file location is added at the *end* of Base.LOAD_CACHE_PATH, not the beginning, and any cache files that need to be recompiled will be put into the user's .julia directory, not in the read-only system-wide location. See https://github.com/JuliaLang/julia/pull/14369 (which is in Julia 0.4.3 or later) > I would not expect the recompile, since the cached ji files should have > the same version as the installed jl files, so as far as I can tell, no > recompilation should be necessary. I am trying to figure out if there is > any version mismatch, or if there is any other reason for the recompile. > Also, is there any way to find out the version of an installed package and > the version of the cache? > The cache files are recompiled whenever <https://github.com/JuliaLang/julia/blob/cbed9af6d89ea5d51f6a1b51040032f918fb6249/base/loading.jl#L543-L572> : 1) the Julia version changes 2) the module path changes 3) the timestamp on a source file (that was used to create the cache file) changes 4) a dependency module changes (i.e. a dependency was recompiled) I'm guessing that you are bumping into condition (2). Instead of compiling the modules in your home .julia directory and then copying them into /usr/local, what I would suggest would be: a) remove the module and cache from your .julia directory b) install the module sources into /usr/local/share/julia/site/v0.4 c) (in sudo julia) add /usr/local/share/julia/site/lib/v0.4 to the *beginning* of Base.LOAD_CACHE_PATH and import the module (this will recompile the cache file directly into /usr/local) d) have the users (in their .juliarc) add /usr/local/share/julia/site/lib/v0.4 to the *end* of their Base.LOAD_CACHE_PATH
