74 lines
3.1 KiB
Nix
74 lines
3.1 KiB
Nix
# Functions for copying sources to the Nix store.
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let lib = import ./default.nix; in
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rec {
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# Returns the type of a path: regular (for file), symlink, or directory
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pathType = p: with builtins; getAttr (baseNameOf p) (readDir (dirOf p));
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# Returns true if the path exists and is a directory, false otherwise
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pathIsDirectory = p: if builtins.pathExists p then (pathType p) == "directory" else false;
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# Bring in a path as a source, filtering out all Subversion and CVS
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# directories, as well as backup files (*~).
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cleanSourceFilter = name: type: let baseName = baseNameOf (toString name); in ! (
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# Filter out Subversion and CVS directories.
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(type == "directory" && (baseName == ".git" || baseName == ".svn" || baseName == "CVS" || baseName == ".hg")) ||
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# Filter out backup files.
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lib.hasSuffix "~" baseName ||
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# Filter out generates files.
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lib.hasSuffix ".o" baseName ||
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lib.hasSuffix ".so" baseName ||
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# Filter out nix-build result symlinks
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(type == "symlink" && lib.hasPrefix "result" baseName)
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);
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cleanSource = builtins.filterSource cleanSourceFilter;
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# Filter sources by a list of regular expressions.
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#
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# E.g. `src = sourceByRegex ./my-subproject [".*\.py$" "^database.sql$"]`
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sourceByRegex = src: regexes: builtins.filterSource (path: type:
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let relPath = lib.removePrefix (toString src + "/") (toString path);
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in lib.any (re: builtins.match re relPath != null) regexes) src;
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# Get all files ending with the specified suffices from the given
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# directory or its descendants. E.g. `sourceFilesBySuffices ./dir
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# [".xml" ".c"]'.
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sourceFilesBySuffices = path: exts:
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let filter = name: type:
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let base = baseNameOf (toString name);
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in type == "directory" || lib.any (ext: lib.hasSuffix ext base) exts;
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in builtins.filterSource filter path;
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# Get the commit id of a git repo
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# Example: commitIdFromGitRepo <nixpkgs/.git>
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commitIdFromGitRepo =
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let readCommitFromFile = path: file:
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with builtins;
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let fileName = toString path + "/" + file;
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packedRefsName = toString path + "/packed-refs";
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in if lib.pathExists fileName
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then
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let fileContent = lib.fileContents fileName;
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# Sometimes git stores the commitId directly in the file but
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# sometimes it stores something like: «ref: refs/heads/branch-name»
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matchRef = match "^ref: (.*)$" fileContent;
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in if isNull matchRef
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then fileContent
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else readCommitFromFile path (lib.head matchRef)
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# Sometimes, the file isn't there at all and has been packed away in the
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# packed-refs file, so we have to grep through it:
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else if lib.pathExists packedRefsName
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then
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let fileContent = readFile packedRefsName;
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matchRef = match (".*\n([^\n ]*) " + file + "\n.*") fileContent;
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in if isNull matchRef
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then throw ("Could not find " + file + " in " + packedRefsName)
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else lib.head matchRef
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else throw ("Not a .git directory: " + path);
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in lib.flip readCommitFromFile "HEAD";
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}
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