Add 'infra/libkookie/' from commit 'd661aa56a8843e991261510c1bb28fdc2f6975ae'

git-subtree-dir: infra/libkookie
git-subtree-mainline: 49f735974dd103039ddc4cb576bb76555164a9e7
git-subtree-split: d661aa56a8843e991261510c1bb28fdc2f6975ae

1 files changed, 52 insertions, 0 deletions

diff --git a/infra/libkookie/nixpkgs/pkgs/development/interpreters/python/wrap-python.nix b/infra/libkookie/nixpkgs/pkgs/development/interpreters/python/wrap-python.nix
new file mode 100644
index 000000000000..6a19a2152419
--- /dev/null
+++ b/infra/libkookie/nixpkgs/pkgs/development/interpreters/python/wrap-python.nix
@@ -0,0 +1,52 @@
+{ lib
+, python
+, makeSetupHook
+, makeWrapper }:
+
+with lib;
+
+makeSetupHook {
+      deps = makeWrapper;
+      substitutions.sitePackages = python.sitePackages;
+      substitutions.executable = python.interpreter;
+      substitutions.python = python.pythonForBuild;
+      substitutions.pythonHost = python;
+      substitutions.magicalSedExpression = let
+        # Looks weird? Of course, it's between single quoted shell strings.
+        # NOTE: Order DOES matter here, so single character quotes need to be
+        #       at the last position.
+        quoteVariants = [ "'\"'''\"'" "\"\"\"" "\"" "'\"'\"'" ]; # hey Vim: ''
+
+        mkStringSkipper = labelNum: quote: let
+          label = "q${toString labelNum}";
+          isSingle = elem quote [ "\"" "'\"'\"'" ];
+          endQuote = if isSingle then "[^\\\\]${quote}" else quote;
+        in ''
+          /^[a-z]?${quote}/ {
+            /${quote}${quote}|${quote}.*${endQuote}/{n;br}
+            :${label}; n; /^${quote}/{n;br}; /${endQuote}/{n;br}; b${label}
+          }
+        '';
+
+        # This preamble does two things:
+        # * Sets argv[0] to the original application's name; otherwise it would be .foo-wrapped.
+        #   Python doesn't support `exec -a`.
+        # * Adds all required libraries to sys.path via `site.addsitedir`. It also handles *.pth files.
+        preamble = ''
+          import sys
+          import site
+          import functools
+          sys.argv[0] = '"'$(readlink -f "$f")'"'
+          functools.reduce(lambda k, p: site.addsitedir(p, k), ['"$([ -n "$program_PYTHONPATH" ] && (echo "'$program_PYTHONPATH'" | sed "s|:|','|g") || true)"'], site._init_pathinfo())
+        '';
+
+      in ''
+        1 {
+          :r
+          /\\$|,$/{N;br}
+          /__future__|^ |^ *(#.*)?$/{n;br}
+          ${concatImapStrings mkStringSkipper quoteVariants}
+          /^[^# ]/i ${replaceStrings ["\n"] [";"] preamble}
+        }
+      '';
+} ./wrap.sh