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Add subDir argument to cleanGit (#280)

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Co-Authored-By: Viktor Kronvall <viktor.kronvall@gmail.com>
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Hamish Mackenzie 2019-10-30 15:09:45 +13:00 committed by GitHub
parent e920ddf698
commit 23e0c2fcea
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2 changed files with 13 additions and 4 deletions
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11
docs/user-guide.md
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@ -108,7 +108,16 @@ If your project has a `cabal.project` you can add a `default.nix` like this:
Note: The `cleanGit` call will exclude any files not in the index file
in the local `.git` directory. This is extremely useful as it avoids
unwanted builds (for instance when the contents of `dist-newstyle` are
modified by cabal).
modified by cabal). It is important that `src` is the root directory
of the repo (so `cleanGit` can find the `.git` directory). If the project
is not at the root of the repo, then also pass `subDir` to `cleanGit` with the
location of the project relative to `src` as a string. For example:
```
src = pkgs.haskell-nix.haskellLib.cleanGit
{ src = ./.; subDir = "subdir/another-subdir"; };
```
You can build a component from your project with `nix-build` (in this
case the `hello` executable in a `helloworld` package):

6
lib/clean-git.nix
View File

@ -1,6 +1,6 @@
# From https://github.com/NixOS/nix/issues/2944
{ lib, runCommand, git, cleanSourceWith }:
{ src }:
{ src, subDir ? "" }:
# The function call
#
@ -90,12 +90,12 @@ then
filter = filter_from_list src whitelist;
in
cleanSourceWith {
inherit src filter;
inherit src subDir filter;
}
else
trace "gitSource.nix: ${toString src} does not seem to be a git repository,\nassuming it is a clean checkout." (
cleanSourceWith {
inherit src;
inherit src subDir;
}
)