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https://github.com/NixOS/nixpkgs.git
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b8bcbec5fd
* Manage patches in git * Fixes the hook invocation to be more safe. Thanks @Mic92 * Install gems as user by default * Install gem binaries with the /usr/bin/env shebang * Fixes a bug where the passthru.libPath and passthru.gemPath would point to the wrong directory * Overhaul ruby version heuristics
64 lines
1.7 KiB
Nix
64 lines
1.7 KiB
Nix
# Contains the ruby version heuristics
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{ lib }:
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with lib;
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let
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# The returned set should be immutable
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rubyVersion = major: minor: tiny: tail:
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rec {
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inherit major minor tiny tail;
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# Contains the patch number "223" if tail is "p223" or null
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patchLevel =
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let
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p = removePrefix "p" tail;
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isPosInt = num:
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0 == stringLength
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(replaceStrings
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["0" "1" "2" "3" "4" "5" "6" "7" "8" "9"]
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["" "" "" "" "" "" "" "" "" "" ]
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num);
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in
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if hasPrefix "p" tail && isPosInt p then p
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else null;
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# Shortcuts
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majMin = "${major}.${minor}";
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majMinTiny = "${major}.${minor}.${tiny}";
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# Ruby separates lib and gem folders by ABI version which isn't very
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# consistent.
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libDir =
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if versionAtLeast majMinTiny "2.1.0" then
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"${majMin}.0"
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else if versionAtLeast majMinTiny "2.0.0" then
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"2.0.0"
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else if versionAtLeast majMinTiny "1.9.1" then
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"1.9.1"
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else
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throw "version ${majMinTiny} is not supported";
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# How ruby releases are tagged on github.com/ruby/ruby
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gitTag =
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let
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base = "v${major}_${minor}_${tiny}";
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in
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if patchLevel != null then
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"${base}_${patchLevel}"
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else
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if tail != "" then
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"${base}_${tail}"
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else
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base;
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# Implements the builtins.toString interface.
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__toString = self:
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self.majMinTiny + (
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if self.patchLevel != null then
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"-p${self.patchLevel}"
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else if self.tail != "" then
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"-${self.tail}"
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else "");
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};
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in
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rubyVersion
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