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Added lib.cleanSourceWith as composable version of filterSource

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This commit is contained in:
Will Fancher 2018-01-02 00:29:20 -05:00
parent 866c511a0a
commit 7e5f37d73b
2 changed files with 27 additions and 6 deletions
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2
lib/default.nix
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@ -93,7 +93,7 @@ let
hiPrioSet;
inherit (sources) pathType pathIsDirectory cleanSourceFilter
cleanSource sourceByRegex sourceFilesBySuffices
commitIdFromGitRepo;
commitIdFromGitRepo cleanSourceWith;
inherit (modules) evalModules closeModules unifyModuleSyntax
applyIfFunction unpackSubmodule packSubmodule mergeModules
mergeModules' mergeOptionDecls evalOptionValue mergeDefinitions

31
lib/sources.nix
View File

@ -26,14 +26,35 @@ rec {
(type == "symlink" && lib.hasPrefix "result" baseName)
);
cleanSource = builtins.filterSource cleanSourceFilter;
cleanSource = src: cleanSourceWith { filter = cleanSourceFilter; inherit src; };
# Like `builtins.filterSource`, except it will compose with itself,
# allowing you to chain multiple calls together without any
# intermediate copies being put in the nix store.
#
# lib.cleanSourceWith f (lib.cleanSourceWith g ./.) # Succeeds!
# builtins.filterSource f (builtins.filterSource g ./.) # Fails!
cleanSourceWith = { filter, src }:
let
isFiltered = src ? _isLibCleanSourceWith;
origSrc = if isFiltered then src.origSrc else src;
filter' = if isFiltered then name: type: filter name type && src.filter name type else filter;
in {
inherit origSrc;
filter = filter';
outPath = builtins.filterSource filter' origSrc;
_isLibCleanSourceWith = true;
};
# Filter sources by a list of regular expressions.
#
# E.g. `src = sourceByRegex ./my-subproject [".*\.py$" "^database.sql$"]`
sourceByRegex = src: regexes: builtins.filterSource (path: type:
let relPath = lib.removePrefix (toString src + "/") (toString path);
in lib.any (re: builtins.match re relPath != null) regexes) src;
sourceByRegex = src: regexes: cleanSourceWith {
filter = (path: type:
let relPath = lib.removePrefix (toString src + "/") (toString path);
in lib.any (re: builtins.match re relPath != null) regexes);
inherit src;
};
# Get all files ending with the specified suffices from the given
# directory or its descendants. E.g. `sourceFilesBySuffices ./dir
@ -42,7 +63,7 @@ rec {
let filter = name: type:
let base = baseNameOf (toString name);
in type == "directory" || lib.any (ext: lib.hasSuffix ext base) exts;
in builtins.filterSource filter path;
in cleanSourceWith { inherit filter; src = path; };
# Get the commit id of a git repo