From 6b1e2a51aad506a559efbf16c9d83f7712b8a4a5 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Thu, 7 May 2020 23:32:41 +0100
Subject: [PATCH 1/2] gitAndTools.git-fast-export: 190107 -> 200213, fix

fixing involves providing it with mercurial_4 (and implicitly python27 -
current released fast-export doesn't support py3 yet) and adding git to
the wrapped PATH. this shouldn't be a runtime-resolved dependency.
---
 .../version-management/git-and-tools/default.nix    |  2 +-
 .../git-and-tools/fast-export/default.nix           | 13 +++++++------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/pkgs/applications/version-management/git-and-tools/default.nix b/pkgs/applications/version-management/git-and-tools/default.nix
index 41ef3cce4654..657ae4605eb0 100644
--- a/pkgs/applications/version-management/git-and-tools/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/default.nix
@@ -98,7 +98,7 @@ let
 
   git-fame = callPackage ./git-fame {};
 
-  git-fast-export = callPackage ./fast-export { };
+  git-fast-export = callPackage ./fast-export { mercurial = mercurial_4; };
 
   git-filter-repo = callPackage ./git-filter-repo {
     pythonPackages = python3Packages;
diff --git a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
index 22009f10d44f..2134b617c283 100644
--- a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
@@ -1,13 +1,14 @@
-{stdenv, fetchgit, mercurial, makeWrapper}:
+{stdenv, fetchFromGitHub, git, mercurial, makeWrapper}:
 
 stdenv.mkDerivation rec {
   pname = "fast-export";
-  version = "190107";
+  version = "200213";
 
-  src = fetchgit {
-    url = "git://repo.or.cz/fast-export.git";
+  src = fetchFromGitHub {
+    owner = "frej";
+    repo = pname;
     rev = "v${version}";
-    sha256 = "14azfps9jd5anivcvfwflgsvqdyy6gm9jy284kzx2ng9f7871d14";
+    sha256 = "0hzyh66rlawxip4n2pvz7pbs0cq82clqv1d6c7hf60v1drjxw287";
   };
 
   buildInputs = [mercurial.python mercurial makeWrapper];
@@ -27,7 +28,7 @@ stdenv.mkDerivation rec {
 
     for script in $out/bin/*.sh; do
       wrapProgram $script \
-        --prefix PATH : "${mercurial.python}/bin":$libexec \
+        --prefix PATH : "${git}/bin":"${mercurial.python}/bin":$libexec \
         --prefix PYTHONPATH : "${mercurial}/${mercurial.python.sitePackages}":$sitepackagesPath
     done
   '';

From b91ad4289615209f0ea2030eda08290ada494f7c Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Thu, 7 May 2020 23:34:20 +0100
Subject: [PATCH 2/2] gitAndTools.git-fast-export: add installCheckPhase

this creates and converts a simple hg repository - should stop us
inadvertently breaking this package.
---
 .../git-and-tools/fast-export/default.nix     | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
index 2134b617c283..80f048d05752 100644
--- a/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/fast-export/default.nix
@@ -33,6 +33,29 @@ stdenv.mkDerivation rec {
     done
   '';
 
+  doInstallCheck = true;
+  # deliberately not adding git or hg into installCheckInputs - package should
+  # be able to work without them in runtime env
+  installCheckPhase = ''
+    mkdir repo-hg
+    pushd repo-hg
+    ${mercurial}/bin/hg init
+    echo foo > bar
+    ${mercurial}/bin/hg add bar
+    ${mercurial}/bin/hg commit --message "baz"
+    popd
+
+    mkdir repo-git
+    pushd repo-git
+    ${git}/bin/git init
+    ${git}/bin/git config core.ignoreCase false  # for darwin
+    $out/bin/hg-fast-export.sh -r ../repo-hg/ --hg-hash
+    for s in "foo" "bar" "baz" ; do
+      (${git}/bin/git show | grep $s > /dev/null) && echo $s found
+    done
+    popd
+  '';
+
   meta = with stdenv.lib; {
     description = "Import mercurial into git";
     homepage = "https://repo.or.cz/w/fast-export.git";