98b7228c06
This consists of just one single ruby script, which runs shell commands assuming that the current PATH has all dependencies set up correctly. Unfortunately, this somewhat breaks functional purity as the command won't work correctly in environments that do not contain git, darcs or diffutils. During the patchPhase we replace all those dependencies directly in the ruby source code, rather than creating a wrapper. Afterwards we run a checkPhase which not only checks whether we caught all the dependencies (PATH=) but also checks if the conversion has been done correctly. Signed-off-by: aszlig <aszlig@redmoonstudios.org>
81 lines
2.6 KiB
Nix
81 lines
2.6 KiB
Nix
{ stdenv, fetchgit, ruby, gnugrep, diffutils, git, darcs }:
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stdenv.mkDerivation rec {
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name = "darcs-to-git-${version}";
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version = "0.2git";
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src = fetchgit {
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url = "git://github.com/purcell/darcs-to-git.git";
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rev = "58a55936899c7e391df5ae1326c307fbd4617a25";
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sha256 = "366aa691920991e21cfeebd4cbd53a6c42d80e2bc46ff398af482d1d15bac4c3";
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};
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patchPhase = let
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matchExecution = ''(\<(output_of|system|run)\([^"%]*("|%w\()|^[^"`]*`)'';
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in ''
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sed -r -i \
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-e '1s|^#!.*|#!${ruby}/bin/ruby|' \
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-e 's!${matchExecution}git\>!\1${git}/bin/git!' \
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-e 's!${matchExecution}darcs\>!\1${darcs}/bin/darcs!' \
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-e 's!${matchExecution}diff\>!\1${diffutils}/bin/diff!' \
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-e 's!\<egrep\>!${gnugrep}/bin/egrep!g' \
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-e 's!%w\(darcs init\)!%w(${darcs}/bin/darcs init)!' \
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darcs-to-git
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'';
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propagatedBuildInputs = [ ruby ];
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installPhase = ''
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install -vD darcs-to-git "$out/bin/darcs-to-git"
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'';
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doCheck = true;
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checkPhase = ''
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orig_dir="$(pwd)"
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darcs_repos="$(pwd)/darcs_test_repos"
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git_repos="$(pwd)/git_test_repos"
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test_home="$(pwd)/test_home"
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mkdir "$darcs_repos" "$git_repos" "$test_home"
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cd "$darcs_repos"
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${darcs}/bin/darcs init
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echo "this is a test file" > new_file1
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${darcs}/bin/darcs add new_file1
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HOME="$test_home" ${darcs}/bin/darcs record -a -m c1 -A none
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echo "testfile1" > new_file1
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echo "testfile2" > new_file2
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${darcs}/bin/darcs add new_file2
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HOME="$test_home" ${darcs}/bin/darcs record -a -m c2 -A none
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${darcs}/bin/darcs mv new_file2 only_one_file
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rm -f new_file1
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HOME="$test_home" ${darcs}/bin/darcs record -a -m c3 -A none
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cd "$git_repos"
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HOME="$test_home" PATH= "$orig_dir/darcs-to-git" "$darcs_repos"
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assertFileContents() {
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echo -n "File $1 contains '$2'..." >&2
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if [ "x$(cat "$1")" = "x$2" ]; then
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echo " passed." >&2
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return 0
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else
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echo " failed: '$(cat "$1")' != '$2'" >&2
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return 1
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fi
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}
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echo "Checking if converted repository matches original repository:" >&2
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assertFileContents only_one_file testfile2
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${git}/bin/git reset --hard HEAD^
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assertFileContents new_file1 testfile1
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assertFileContents new_file2 testfile2
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${git}/bin/git reset --hard HEAD^
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assertFileContents new_file1 "this is a test file"
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echo "All checks passed." >&2
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cd "$orig_dir"
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rm -rf "$darcs_repos" "$git_repos" "$test_home"
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'';
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meta = {
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description = "Converts a Darcs repository into a Git repository";
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homepage = "http://www.sanityinc.com/articles/converting-darcs-repositories-to-git";
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license = stdenv.lib.licenses.mit;
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};
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}
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