Generate --subpath for local targets #107
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Some packages may need access to files outside of their subdirectory (e.g. hpack files may source other hpack files). Therefore it is important to keep the integrity of the project directory and specify individual subdirectories by passing `--subpath` to `cabal2nix`. Since `stack` does not support specifying subdirs for file paths (unlike git repositories), it is impossible to tell in general where is the root of the dependency. But we can at least do this for local targets.
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There is a test failing in travis ci. |
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Looking at the travis log it is hard to tell what exactly fails, but I suspect it is the last line of It is definitely wrong now, but I don’t know how to fix it, because I don’t know what it is supposed to test. Maybe @jmitchell can help me with this. It was introduced in a88e4ea, so probably taking a look at DEVOPS-282, which I don’t have access to, could help. |
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Suppose there is a package with the following structure:
hpack/common.yamlsome useful hpack defiitionslib/package.yamlsources../hpack/common.yamlstack.yamlA call to
cabal2nix ./libwill generate a broken expression because it will havesrc = ./libwhich will cause nix to copy thelibdirectory into the store and then../hpack/common.yamlwill be unavailable.The correct invocation is
cabal2nix . --subpath lib.