nix/9.nix-gitignore
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Clarify gitignoreFilter example

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Robert Hensing 2020-06-10 09:17:01 +02:00 • committed by GitHub
parent 3f94c456e3
commit eea2487dbb
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1 changed files with 16 additions and 4 deletions
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20
docs/gitignoreFilter.md
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@ -16,12 +16,24 @@ let
gitignore = (import (import ./nix/sources.nix)."gitignore.nix" { inherit lib; });
inherit (gitignore) gitignoreFilter;
useGitFilesInSomeWay = src:
customerFilter = src:
let
# IMPORTANT: use a let binding like this to memoize info about the git directories.
f = gitignoreFilter src;
srcIgnored = gitignoreFilter src;
in
somethingUseful (path: type: f path type || false);
path: type:
srcIgnored path type
|| builtins.baseNameOf path == "i-need-this.xml";
name = "example";
exampleSrc = ./.;
in
useGitFilesInSomeWay ./.
mkDerivation {
inherit name;
src = cleanSourceWith {
filter = customerFilter exampleSrc;
src = exampleSrc;
name = name + "-source";
};
};
```