Try using hackage-repo-tool for cabal-testsuite on AppVeyor.

appveyor.yml

@@ -24,10 +24,13 @@ build_script:
   - Setup build
   - Setup test --show-details=streaming --test-option=--hide-successes
   - Setup install
-  # hackage-repo-tool doesn't build on Windows:
-  # https://github.com/well-typed/hackage-security/issues/175
-  # - echo "" | cabal install hackage-repo-tool --allow-newer=Cabal,time --constraint="Cabal == 2.3.0.0"
-  - cd ..\cabal-testsuite
+  - cd ..
+  - git clone https://github.com/haskell/hackage-security.git
+  - cd hackage-security\hackage-security
+  - echo "" | cabal install --allow-newer=Cabal,time --constraint="Cabal == 2.3.0.0"
+  - cd ..\hackage-repo-tool
+  - echo "" | cabal install --allow-newer=Cabal,time --constraint="Cabal == 2.3.0.0"
+  - cd ..\..\cabal-testsuite
   - ghc --make -threaded -i Setup.hs -package Cabal-2.3.0.0
   - echo "" | ..\appveyor-retry cabal install --only-dependencies --enable-tests
   - Setup configure --user --ghc-option=-Werror --enable-tests

cabal-testsuite/PackageTests/CustomDep/cabal.test.hs

@@ -8,5 +8,5 @@ main = cabalTest $ do
     -- database, don't record the output
     recordMode DoNotRecord $ do
         -- TODO: Hack, delete me
-        withEnvFilter (/= "HOME") $ do
+        withEnvFilter (`notElem` ["HOME", "CABAL_CONFIG"]) $ do
             cabal "new-build" ["all"]

cabal-testsuite/PackageTests/CustomPlain/cabal.test.hs

@@ -5,7 +5,7 @@ main = cabalTest $ do
     -- Regression test for #4393
     recordMode DoNotRecord $ do
         -- TODO: Hack; see also CustomDep/cabal.test.hs
-        withEnvFilter (/= "HOME") $ do
+        withEnvFilter (`notElem` ["HOME", "CABAL_CONFIG"]) $ do
             -- On -v2, we don't have vQuiet set, which suppressed
             -- the error
             cabal "new-build" ["-v1"]

cabal-testsuite/Test/Cabal/Monad.hs

@@ -27,6 +27,7 @@ module Test.Cabal.Monad (
     resub,
     -- * Derived values from 'TestEnv'
     testCurrentDir,
+    testCaseName,
     testWorkDir,
     testPrefixDir,
     testDistDir,
@@ -316,7 +317,8 @@ runTestM mode m = do
                         -- Try to avoid Unicode output
                         [ ("LC_ALL", Just "C")
                         -- Hermetic builds (knot-tied)
-                        , ("HOME", Just (testHomeDir env))],
+                        , ("HOME", Just (testHomeDir env))
+                        , ("CABAL_CONFIG", Just (testUserCabalConfigFile env))],
                     testShouldFail = False,
                     testRelativeCurrentDir = ".",
                     testHavePackageDb = False,
@@ -588,15 +590,15 @@ testCurrentDir env =
         then testSourceCopyDir env
         else testSourceDir env) </> testRelativeCurrentDir env
 
-testName :: TestEnv -> String
-testName env = testSubName env <.> testMode env
+testCaseName :: TestEnv -> String
+testCaseName env = testSubName env <.> testMode env
 
 -- | The absolute path to the directory containing all the
 -- files for ALL tests associated with a test (respecting
 -- subtests.)  To clean, you ONLY need to delete this directory.
 testWorkDir :: TestEnv -> FilePath
 testWorkDir env =
-    testSourceDir env </> (testName env <.> "dist")
+    testSourceDir env </> (testCaseName env <.> "dist")
 
 -- | The absolute prefix where installs go.
 testPrefixDir :: TestEnv -> FilePath
@@ -644,16 +646,16 @@ testUserCabalConfigFile env = testHomeDir env </> ".cabal" </> "config"
 
 -- | The file where the expected output of the test lives
 testExpectFile :: TestEnv -> FilePath
-testExpectFile env = testSourceDir env </> testName env <.> "out"
+testExpectFile env = testSourceDir env </> testCaseName env <.> "out"
 
 -- | Where we store the actual output
 testActualFile :: TestEnv -> FilePath
-testActualFile env = testWorkDir env </> testName env <.> "comp.out"
+testActualFile env = testWorkDir env </> testCaseName env <.> "comp.out"
 
 -- | Where we will write the normalized actual file (for diffing)
 testNormalizedActualFile :: TestEnv -> FilePath
 testNormalizedActualFile env = testActualFile env <.> "normalized"
 
 -- | Where we will write the normalized expected file (for diffing)
 testNormalizedExpectFile :: TestEnv -> FilePath
-testNormalizedExpectFile env = testWorkDir env </> testName env <.> "out.normalized"
+testNormalizedExpectFile env = testWorkDir env </> testCaseName env <.> "out.normalized"

cabal-testsuite/Test/Cabal/Prelude.hs

@@ -477,7 +477,7 @@ src `archiveTo` dst = do
     -- TODO: Consider using the @tar@ library?
     let (src_parent, src_dir) = splitFileName src
     -- TODO: --format ustar, like createArchive?
-    tar ["-czf", dst, "-C", src_parent, src_dir]
+    tar ["-czf", dst, "--force-local", "-C", src_parent, src_dir]
 
 infixr 4 `archiveTo`
 
@@ -512,7 +512,7 @@ withRepo repo_dir m = do
     let package_cache = testHomeDir env </> ".cabal" </> "packages"
     liftIO $ appendFile (testUserCabalConfigFile env)
            $ unlines [ "repository test-local-repo"
-                     , "  url: file:" ++ testRepoDir env
+                     , "  url: file:" ++ testCaseName env ++ ".dist/repo"
                      , "  secure: True"
                      -- TODO: Hypothetically, we could stick in the
                      -- correct key here