e2589b3ca2
This version should have more conventional regexes that work across many platforms and regex engines. This is an issue because up until Nix 1.11, Nix called out to the libc regex matcher, which behaved differently on Darwin and Linux. And in Nix 1.12, we're moving to std::regex which will also behave differently here. And yes, I do actually evaluate make-disk-image.nix on Darwin ;)
75 lines
3.2 KiB
Nix
75 lines
3.2 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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builtins.match "^.*\.sw[a-z]$" baseName != null ||
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# Filter out generates files.
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lib.hasSuffix ".o" baseName ||
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lib.hasSuffix ".so" baseName ||
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# Filter out nix-build result symlinks
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(type == "symlink" && lib.hasPrefix "result" baseName)
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);
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cleanSource = builtins.filterSource cleanSourceFilter;
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# Filter sources by a list of regular expressions.
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#
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# E.g. `src = sourceByRegex ./my-subproject [".*\.py$" "^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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