t: post-merge adjust of test-lib.sh

Fixes mnauw/git-remote-hg#58

.github/workflows/ci.yml

@@ -1,20 +1,22 @@
 name: CI
 
+# on: [push]
 on:
-  push:
+  # save cycles; disable on push, enable manual trigger
+  workflow_dispatch:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        hg: [ '6.0', '6.1', '6.2', '6.3', '6.4', '6.5', '6.6', '6.7', '6.8', '6.9' ]
+        hg: [ '6.0', '6.1', '6.2', '6.3', '6.4', '6.5', '6.6', '6.7', '6.8', '6.9', '7.0' ]
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
         with:
-          python-version: '3.10'
-      - uses: actions/cache@v3
+          python-version: '3.11'
+      - uses: actions/cache@v4
         id: cache-pip
         with:
           path: ~/.cache/pip
@@ -22,4 +24,21 @@ jobs:
       - name: Install hg
         run:
           pip install mercurial==${{ matrix.hg }}
-      - run: make test
+      - run: prove -j4
+  test-windows:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: '3.11'
+      - uses: actions/cache@v4
+        id: cache-pip
+        with:
+          path: ~/appdata/local/pip/cache
+          key: pip-windows
+      - name: Install hg
+        run:
+          pip install mercurial
+      - name: Run all tests
+        run: prove -j4 --exec bash.exe

Makefile

@@ -29,7 +29,7 @@ build:
 doc: doc/git-remote-hg.1
 
 test:
-	$(MAKE) -C test
+	$(MAKE) -C t
 
 doc/git-remote-hg.1: doc/git-remote-hg.txt
 	asciidoctor -d manpage -b manpage $<

README.asciidoc

@@ -71,13 +71,31 @@ the same commits:
 % git config --global remote-hg.hg-git-compat true
 --------------------------------------
 
+****
+mnauw's note; The above is not quite the case, it only ever has been (somewhat)
+if an undocumented debug mode (`debugextrainmessage` setting) was enabled
+in (likely somewhat patched) `hg-git`.  And as of `hg-git` v1.2.0 the latter is
+no longer considered.  In fact, `hg-git` creates git commits with additional hg
+metadata stored in so-called "extra commit headers". The latter might be seen by
+`git log --format=raw` or `git cat-file -p <commitid>`, but are otherwise mostly
+only used internally by the git suite (for signatures).  While they are supported
+by `dulwich`'s API (which is a python git implementation), there is, however,
+limited to no support for those in git "porcelain or plumbing" commands. In
+particular, `git fast-export` and `git fast-import` do not consider these, so a
+`gitremote-helpers` tool is then also out of luck.  Incidentally, it also
+follows that a `git fast-export | git fast-import` "clone" approach would also
+lose such extra metadata, and likewise so for e.g. `git filter-repo`.
+
+All in all, this mode is not quite recommended.
+If the concern here is not so much `hg-git` compatibility but rather "hg-git-hg
+round-trip fidelity", then see the discussion below on `check-hg-commits` setting.
+****
+
 == Notes ==
 
 Remember to run `git gc --aggressive` after cloning a repository, especially if
 it's a big one. Otherwise lots of space will be wasted.
 
-The newest supported version of Mercurial is 6.2, the oldest one is 2.4.
-
 === Pushing branches ===
 
 To push a branch, you need to use the 'branches/' prefix:
@@ -369,7 +387,8 @@ up elsewhere as expected (regardless of conversion mapping or ABI).
 
 Note that identifying and re-using the hg changeset relies on metadata
 (`refs/notes/hg` and marks files) that is not managed or maintained by any
-git-to-git fetch (or clone).
+git-to-git fetch (or clone) (as that is only automatically so for `refs/heads/`,
+though it could be pushed manually).
 As such (and as said), this approach aims for plain-and-simple safety, but only
 within a local scope (git repo).
 

doc/git-remote-hg.txt

@@ -104,6 +104,20 @@ the invalid '~'
 % git config --global remote-hg.ignore-name ~
 --------------------------------------
 
+Even though the "gitdir" is configurable (using `GIT_DIR`), git does not accept
+certain pathname components, e.g. `.git` or `.gitmodules` (case-insensitive).
+Problems arise if the hg repo contains such pathnames, and recent git versions
+will reject this in a very hard way.  So these pathnames are now mapped
+from "hg space" to "git space" in a one-to-one way, where (e.g.)
+`.git[0 or more suffix]` is mapped to `.git[1 or more suffix]` (obviously by
+appending or removing a suffix). The "suffix" in question defaults to `_`,
+but can be configured using
+
+--------------------------------------
+% git config --global remote-hg.dotfile-suffix _
+--------------------------------------
+
+
 NOTES
 -----
 

git-hg-helper

@@ -97,11 +97,27 @@ def debug(msg, *args):
 def log(msg, *args):
     logger.log(logging.LOG, msg, *args)
 
+# new style way to import a source file
+def _imp_load_source(module_name, file_path):
+    import importlib.util
+    loader = importlib.machinery.SourceFileLoader(module_name, file_path)
+    spec = importlib.util.spec_from_loader(module_name, loader)
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[module_name] = module
+    spec.loader.exec_module(module)
+    return module
+
 def import_sibling(mod, filename):
-    import imp
     mydir = os.path.dirname(__file__)
     sys.dont_write_bytecode = True
-    return imp.load_source(mod, os.path.join(mydir, filename))
+    vi = sys.version_info
+    ff = os.path.join(mydir, filename)
+    if vi.major >= 3 and vi.minor >= 5:
+        return _imp_load_source(mod, ff)
+    else:
+        import imp
+        return imp.load_source(mod, ff)
+
 
 class GitHgRepo:
 
@@ -146,7 +162,7 @@ class GitHgRepo:
         process = self.start_cmd(args, **kwargs)
         output = process.communicate()[0]
         if check and process.returncode != 0:
-            die(b'command failed: %s' % b' '.join([compat.to_b(a) for a in cmd]))
+            die(b'git command failed: %s' % b' '.join([compat.to_b(a) for a in args]))
         return output
 
     def get_config(self, config, getall=False):
@@ -227,9 +243,12 @@ class GitHgRepo:
                         warn(b'failed to find local hg for remote %s' % (r))
                         continue
                 else:
+                    npath = os.path.abspath(hg_path)
+                    # use relative path if possible
+                    if check_version(4, 2):
+                        npath = os.path.join(b'..', b'..', b'..', b'.hg')
                     # make sure the shared path is always up-to-date
-                    util.writefile(os.path.join(local_hg, b'sharedpath'),
-                        os.path.abspath(hg_path))
+                    util.writefile(os.path.join(local_hg, b'sharedpath'), npath)
                 self.hg_repos[r] = os.path.join(local_path)
 
         log('%s determined hg_repos %s', self.identity(), self.hg_repos)
@@ -555,6 +574,43 @@ class GcCommand(SubCommand):
                 gm.store()
 
 
+class MapFileCommand(SubCommand):
+
+    def argumentparser(self):
+        usage = '%%(prog)s %s [options] <remote>' % (self.subcommand)
+        p = argparse.ArgumentParser(usage=usage)
+        p.add_argument('--output', required=True,
+            help='mapfile to write')
+        p.epilog = textwrap.dedent("""\
+        Writes a so-called git-mapfile, as used internally by hg-git.
+        This files consists of lines of format `<githexsha> <hghexsha>`.
+
+        As such, the result could be used to coax hg-git in some manner.
+        However, as git-remote-hg and hg-git may (likely) produce different
+        commits (either git or hg), mixed use of both tools is not recommended.
+        """)
+        return p
+
+    def do(self, options, args):
+        remotehg = import_sibling('remotehg', 'git-remote-hg')
+
+        if not args or len(args) != 1:
+            self.usage('expect 1 remote')
+
+        remote = args[0]
+        hgpath = remotehg.select_marks_dir(remote, self.githgrepo.gitdir, False)
+        puts(b"Loading hg marks ...")
+        hgm = remotehg.Marks(os.path.join(hgpath, b'marks-hg'), None)
+        puts(b"Loading git marks ...")
+        gm = GitMarks(os.path.join(hgpath, b'marks-git'))
+        puts(b"Writing mapfile ...")
+        with open(options.output, 'wb') as f:
+            for c, m in gm.marks.items():
+                hgc = hgm.rev_marks.get(m, None)
+                if hgc:
+                    f.write(b'%s %s\n' % (c, hgc))
+
+
 class SubRepoCommand(SubCommand):
 
     def writestate(repo, state):
@@ -921,6 +977,7 @@ def get_subcommands():
         b'repo': RepoCommand,
         b'gc':  GcCommand,
         b'sub': SubRepoCommand,
+        b'mapfile': MapFileCommand,
         b'help' : HelpCommand
     }
     # add remote named subcommands
@@ -943,6 +1000,7 @@ def do_usage():
     gc      \t perform maintenance and consistency cleanup on repo tracking marks
     sub     \t manage subrepos
     repo    \t show local hg repo backing a remote
+    mapfile \t dump a hg-git git-mapfile
 
     If the subcommand is the name of a remote hg repo, then any remaining arguments
     are considered a "hg command", e.g. hg heads, or thg, and it is then executed

git-remote-hg

@@ -122,6 +122,27 @@ else:
         urlparse = staticmethod(_urlparse)
         urljoin = staticmethod(_urljoin)
 
+# new style way to import a source file
+def _imp_load_source(module_name, file_path):
+    import importlib.util
+    loader = importlib.machinery.SourceFileLoader(module_name, file_path)
+    spec = importlib.util.spec_from_loader(module_name, loader)
+    module = importlib.util.module_from_spec(spec)
+    sys.modules[module_name] = module
+    spec.loader.exec_module(module)
+    return module
+
+def import_sibling(mod, filename):
+    mydir = os.path.dirname(__file__)
+    sys.dont_write_bytecode = True
+    vi = sys.version_info
+    ff = os.path.join(mydir, filename)
+    if vi.major >= 3 and vi.minor >= 5:
+        return _imp_load_source(mod, ff)
+    else:
+        import imp
+        return imp.load_source(mod, ff)
+
 #
 # If you want to see Mercurial revisions as Git commit notes:
 # git config core.notesRef refs/notes/hg
@@ -417,7 +438,7 @@ def export_file(ctx, fname):
         puts(b"data %d" % len(d))
         puts(f.data())
 
-    path = fix_file_path(f.path())
+    path = fixup_path_to_git(fix_file_path(f.path()))
     return (gitmode(f.flags()), mark, path)
 
 def get_filechanges(repo, ctx, parent):
@@ -497,6 +518,51 @@ def fixup_user(user):
 
     return b'%s <%s>' % (name, mail)
 
+# (recent) git fast-import does not accept .git or .gitmodule component names
+# (anywhere, case-insensitive)
+# in any case, surprising things may happen, so add some front-end replacement magic;
+# transform of (hg) .git(0 or more suffix) to (git) .git(1 or more suffix)
+# (likewise so for any invalid git keyword)
+def fixup_dotfile_path(path, suffix, add):
+    def subst(part):
+        if (not part) or part[0] != ord(b'.'):
+            return part
+        for prefix in (b'.git', b'.gitmodules'):
+            pl = len(prefix)
+            tail = len(part) - pl
+            if tail < 0:
+                continue
+            if part[0:pl].lower() == prefix and part[pl:] == suffix * tail:
+                if add:
+                    return part + suffix
+                elif tail == 0:
+                    # .git should not occur in git space
+                    # so complain
+                    if pl == 3:
+                        die('invalid path component %s' % part)
+                    else:
+                        # but .gitmodules might
+                        # leave as-is, it is handled/ignored elsewhere
+                        return part
+                else:
+                    return part[0:-1]
+        return part
+    # quick optimization check;
+    if (not path) or (path[0] != ord(b'.') and path.find(b'/.') < 0):
+        return path
+    sep = b'/'
+    return sep.join((subst(part) for part in path.split(sep)))
+
+def fixup_path_to_git(path):
+    if not dotfile_suffix:
+        return path
+    return fixup_dotfile_path(path, dotfile_suffix, True)
+
+def fixup_path_from_git(path):
+    if not dotfile_suffix:
+        return path
+    return fixup_dotfile_path(path, dotfile_suffix, False)
+
 def updatebookmarks(repo, peer):
     remotemarks = peer.listkeys(b'bookmarks')
 
@@ -578,16 +644,16 @@ def get_repo(url, alias):
             os.makedirs(dirname)
 
         local_path = os.path.join(dirname, b'clone')
+        kwargs = {}
+        hg_path = os.path.join(shared_path, b'.hg')
         if check_version(4, 2):
-            if not os.path.exists(local_path):
-                hg.share(myui, shared_path, local_path, update=False, relative=True)
+            kwargs = {'relative': True}
+            hg_path = os.path.join(b'..', b'..', b'..', b'.hg')
+        if not os.path.exists(local_path):
+            hg.share(myui, shared_path, local_path, update=False, **kwargs)
         else:
-            if not os.path.exists(local_path):
-                hg.share(myui, shared_path, local_path, update=False)
-            else:
-                # make sure the shared path is always up-to-date
-                hg_path = os.path.join(shared_path, b'.hg')
-                util.writefile(os.path.join(local_path, b'.hg', b'sharedpath'), hg_path)
+            # make sure the shared path is always up-to-date
+            util.writefile(os.path.join(local_path, b'.hg', b'sharedpath'), hg_path)
 
         repo = hg.repository(myui, local_path)
         try:
@@ -693,6 +759,7 @@ def export_ref(repo, name, kind, head):
                 if rename:
                     renames.append((rename[0], f))
 
+            # NOTE no longer used in hg-git, a HG:rename extra header is used
             for e in renames:
                 extra_msg += b"rename : %s => %s\n" % e
 
@@ -727,7 +794,7 @@ def export_ref(repo, name, kind, head):
                 puts(b"merge :%u" % (rev_to_mark(parents[1])))
 
         for f in removed:
-            puts(b"D %s" % (fix_file_path(f)))
+            puts(b"D %s" % fixup_path_to_git(fix_file_path(f)))
         for f in modified_final:
             puts(b"M %s :%u %s" % f)
         puts()
@@ -1020,6 +1087,7 @@ def parse_commit(parser):
         else:
             die(b'Unknown file command: %s' % line)
         path = c_style_unescape(path)
+        path = fixup_path_from_git(path)
         files[path] = files.get(path, {})
         files[path].update(f)
 
@@ -1127,11 +1195,17 @@ def parse_commit(parser):
         # add some extra that hg-git adds (almost) unconditionally
         # see also https://foss.heptapod.net/mercurial/hg-git/-/merge_requests/211
         # NOTE it could be changed to another value below
-        extra[b'hg-git-rename-source'] = b'git'
+        # actually, it is *almost* unconditionally, and only done if the commit
+        # is deduced to originate in git.  However, the latter is based on
+        # presence/absence of HG markers in commit "extra headers".
+        # The latter can not be handled here, and so this can not be correctly
+        # reproduced.
+        # extra[b'hg-git-rename-source'] = b'git'
         i = data.find(b'\n--HG--\n')
         if i >= 0:
             tmp = data[i + len(b'\n--HG--\n'):].strip()
             for k, v in [e.split(b' : ', 1) for e in tmp.split(b'\n')]:
+                # NOTE no longer used in hg-git, a HG:rename extra header is used
                 if k == b'rename':
                     old, new = v.split(b' => ', 1)
                     files[new]['rename'] = old
@@ -1602,10 +1676,7 @@ def do_push_refspec(parser, refspec, revs):
             tmpfastexport = open(os.path.join(marksdir, b'git-fast-export-%d' % (os.getpid())), 'w+b')
             subprocess.check_call(cmd, stdin=None, stdout=tmpfastexport)
             try:
-                import imp
-                sys.dont_write_bytecode = True
-                ctx.hghelper = imp.load_source('hghelper', \
-                    os.path.join(os.path.dirname(__file__), 'git-hg-helper'))
+                ctx.hghelper = import_sibling('hghelper', 'git-hg-helper')
                 ctx.hghelper.init_git(gitdir)
                 ctx.gitmarks = ctx.hghelper.GitMarks(tmpmarks)
                 # let processing know it should not bother pushing if not requested
@@ -1842,6 +1913,7 @@ def main(args):
     global capability_push
     global remove_username_quotes
     global marksdir
+    global dotfile_suffix
 
     marks = None
     is_tmp = False
@@ -1861,6 +1933,7 @@ def main(args):
     track_branches = get_config_bool('remote-hg.track-branches', True)
     capability_push = get_config_bool('remote-hg.capability-push', True)
     remove_username_quotes = get_config_bool('remote-hg.remove-username-quotes', True)
+    dotfile_suffix = get_config('remote-hg.dotfile-suffix').strip() or b'_'
     force_push = False
 
     if hg_git_compat:

setup.py

@@ -3,7 +3,7 @@
 import setuptools
 
 # strip leading v
-version = 'v1.0.4'[1:]
+version = 'v1.0.5'[1:]
 
 # check for released version
 assert (len(version) > 0)

t/bidi.t

@@ -8,7 +8,7 @@
 
 test_description='Test bidirectionality of remote-hg'
 
-. ./test-lib.sh
+. "$(dirname "$0")"/test-lib.sh
 
 # clone to a git repo
 git_clone () {

t/helper.t

@@ -8,7 +8,7 @@
 
 test_description='Test git-hg-helper'
 
-. ./test-lib.sh
+. "$(dirname "$0")"/test-lib.sh
 
 if ! test_have_prereq PYTHON
 then
@@ -99,7 +99,7 @@ test_expect_success 'subcommand repo - with local proxy' '
 	test_cmp expected actual
 '
 
-test_expect_success 'subcommands hg-rev and git-rev' '
+test_expect_success 'subcommands hg-rev and git-rev and mapfile' '
 	test_when_finished "rm -rf gitrepo* hgrepo*" &&
 
 	setup_repos &&
@@ -110,7 +110,9 @@ test_expect_success 'subcommands hg-rev and git-rev' '
 	test -s rev-HEAD &&
 	git-hg-helper hg-rev `cat rev-HEAD` > hg-HEAD &&
 	git-hg-helper git-rev `cat hg-HEAD` > git-HEAD &&
-	test_cmp rev-HEAD git-HEAD
+	git-hg-helper mapfile --output mapfile origin &&
+	test_cmp rev-HEAD git-HEAD &&
+	grep "`cat rev-HEAD` `cat hg-HEAD`" mapfile
 	)
 '
 

t/hg-git.t

@@ -10,7 +10,7 @@
 
 test_description='Test remote-hg output compared to hg-git'
 
-. ./test-lib.sh
+. "$(dirname "$0")"/test-lib.sh
 
 export EXPECTED_DIR="$SHARNESS_TEST_DIRECTORY/expected"
 
@@ -101,6 +101,8 @@ setup () {
 	[remote-hg]
 		hg-git-compat = true
 		track-branches = false
+		# directly use local repo to avoid push (and hence phase issues)
+		shared-marks = false
 	EOF
 
 	export HGEDITOR=true

t/main-push.t

@@ -1,8 +1,8 @@
+#!/bin/bash
+
 CAPABILITY_PUSH=t
 
-test -n "$TEST_DIRECTORY" || TEST_DIRECTORY=$(dirname $0)/
-. "$TEST_DIRECTORY"/main.t
-
+. "$(dirname "$0")"/main.t
 
 # .. and some push mode only specific tests
 

t/main.t

@@ -8,7 +8,7 @@
 
 test_description='Test remote-hg'
 
-. ./test-lib.sh
+. "$(dirname "$0")"/test-lib.sh
 
 if test "$CAPABILITY_PUSH" = "t"
 then
@@ -268,6 +268,41 @@ test_expect_success 'strip' '
 	test_cmp actual expected
 '
 
+test_expect_success 'dotfiles' '
+	test_when_finished "rm -rf hgrepo gitrepo" &&
+
+	(
+	hg init hgrepo &&
+	cd hgrepo &&
+
+	echo one >.git &&
+	echo ONE >.GIT &&
+	mkdir a && echo two > a/.gitmodules &&
+	hg add .git .GIT a/.gitmodules &&
+	hg commit -m zero
+	) &&
+
+	git clone "hg::hgrepo" gitrepo &&
+	test_cmp gitrepo/.git_ hgrepo/.git &&
+	test_cmp gitrepo/.GIT_ hgrepo/.GIT &&
+	test_cmp gitrepo/a/.gitmodules_ hgrepo/a/.gitmodules &&
+
+	(
+	cd gitrepo &&
+	echo three >.git_ &&
+	echo THREE >.GIT &&
+	echo four >a/.gitmodules_ &&
+	git add .git_ .GIT_ a/.gitmodules_ &&
+	git commit -m one &&
+	git push
+	) &&
+
+	hg -R hgrepo update &&
+	test_cmp gitrepo/.git_ hgrepo/.git &&
+	test_cmp gitrepo/.GIT_ hgrepo/.GIT &&
+	test_cmp gitrepo/a/.gitmodules_ hgrepo/a/.gitmodules
+'
+
 test_expect_success 'remote push with master bookmark' '
 	test_when_finished "rm -rf hgrepo gitrepo*" &&
 

t/sharness.sh

@@ -1,8 +1,9 @@
-#!/bin/sh
+# Sharness test framework.
 #
 # Copyright (c) 2011-2012 Mathias Lafeldt
 # Copyright (c) 2005-2012 Git project
 # Copyright (c) 2005-2012 Junio C Hamano
+# Copyright (c) 2019-2023 Felipe Contreras
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,42 +18,52 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see http://www.gnu.org/licenses/ .
 
+if test -n "${ZSH_VERSION-}"
+then
+	# shellcheck disable=SC2296
+	SHARNESS_SOURCE=${(%):-%x}
+	emulate sh -o POSIX_ARGZERO
+else
+	# shellcheck disable=SC3028
+	SHARNESS_SOURCE=${BASH_SOURCE-$0}
+fi
+
 # Public: Current version of Sharness.
-SHARNESS_VERSION="1.1.0"
+SHARNESS_VERSION="1.2.1"
 export SHARNESS_VERSION
 
-# Public: The file extension for tests.  By default, it is set to "t".
 : "${SHARNESS_TEST_EXTENSION:=t}"
+# Public: The file extension for tests.  By default, it is set to "t".
 export SHARNESS_TEST_EXTENSION
 
+: "${SHARNESS_TEST_DIRECTORY:=$(dirname "$0")}"
+# ensure that SHARNESS_TEST_DIRECTORY is an absolute path so that it
+# is valid even if the current working directory is changed
+SHARNESS_TEST_DIRECTORY=$(cd "$SHARNESS_TEST_DIRECTORY" && pwd) || exit 1
 # Public: Root directory containing tests. Tests can override this variable,
 # e.g. for testing Sharness itself.
-if test -z "$SHARNESS_TEST_DIRECTORY"
-then
-	SHARNESS_TEST_DIRECTORY=$(pwd)
-else
-	# ensure that SHARNESS_TEST_DIRECTORY is an absolute path so that it
-	# is valid even if the current working directory is changed
-	SHARNESS_TEST_DIRECTORY=$(cd "$SHARNESS_TEST_DIRECTORY" && pwd) || exit 1
-fi
 export SHARNESS_TEST_DIRECTORY
 
-if test -z "$SHARNESS_TEST_OUTPUT_DIRECTORY"
-then
-	# Similarly, override this to store the test-results subdir
-	# elsewhere
-	SHARNESS_TEST_OUTPUT_DIRECTORY=$SHARNESS_TEST_DIRECTORY
-fi
+: "${SHARNESS_TEST_SRCDIR:=$(cd "$(dirname "$SHARNESS_SOURCE")" && pwd)}"
+# Public: Source directory of test code and sharness library.
+# This directory may be different from the directory in which tests are
+# being run.
+export SHARNESS_TEST_SRCDIR
+
+: "${SHARNESS_TEST_OUTDIR:=$SHARNESS_TEST_DIRECTORY}"
+# Public: Directory where the output of the tests should be stored (i.e.
+# trash directories).
+export SHARNESS_TEST_OUTDIR
 
 #  Reset TERM to original terminal if found, otherwise save original TERM
-[ "x" = "x$SHARNESS_ORIG_TERM" ] &&
+[ -z "$SHARNESS_ORIG_TERM" ] &&
 		SHARNESS_ORIG_TERM="$TERM" ||
 		TERM="$SHARNESS_ORIG_TERM"
 # Public: The unsanitized TERM under which sharness is originally run
 export SHARNESS_ORIG_TERM
 
 # Export SHELL_PATH
-: "${SHELL_PATH:=$SHELL}"
+: "${SHELL_PATH:=/bin/sh}"
 export SHELL_PATH
 
 # if --tee was passed, write the output not only to the terminal, but
@@ -62,8 +73,8 @@ done,*)
 	# do not redirect again
 	;;
 *' --tee '*|*' --verbose-log '*)
-	mkdir -p "$SHARNESS_TEST_OUTPUT_DIRECTORY/test-results"
-	BASE="$SHARNESS_TEST_OUTPUT_DIRECTORY/test-results/$(basename "$0" ".$SHARNESS_TEST_EXTENSION")"
+	mkdir -p "$SHARNESS_TEST_OUTDIR/test-results"
+	BASE="$SHARNESS_TEST_OUTDIR/test-results/$(basename "$0" ".$SHARNESS_TEST_EXTENSION")"
 
 	# Make this filename available to the sub-process in case it is using
 	# --verbose-log.
@@ -128,6 +139,9 @@ while test "$#" -ne 0; do
 	--root=*)
 		root=$(expr "z$1" : 'z[^=]*=\(.*\)')
 		shift ;;
+	-x)
+		trace=t
+		shift ;;
 	--verbose-log)
 		verbose_log=t
 		shift ;;
@@ -177,6 +191,40 @@ else
 	}
 fi
 
+: "${test_untraceable:=}"
+# Public: When set to a non-empty value, the current test will not be
+# traced, unless it's run with a Bash version supporting
+# BASH_XTRACEFD, i.e. v4.1 or later.
+export test_untraceable
+
+if test -n "$trace" && test -n "$test_untraceable"
+then
+	# '-x' tracing requested, but this test script can't be reliably
+	# traced, unless it is run with a Bash version supporting
+	# BASH_XTRACEFD (introduced in Bash v4.1).
+	#
+	# Perform this version check _after_ the test script was
+	# potentially re-executed with $TEST_SHELL_PATH for '--tee' or
+	# '--verbose-log', so the right shell is checked and the
+	# warning is issued only once.
+	if test -n "$BASH_VERSION" && eval '
+	     test ${BASH_VERSINFO[0]} -gt 4 || {
+	       test ${BASH_VERSINFO[0]} -eq 4 &&
+	       test ${BASH_VERSINFO[1]} -ge 1
+	     }
+	   '
+	then
+		: Executed by a Bash version supporting BASH_XTRACEFD.  Good.
+	else
+		echo >&2 "warning: ignoring -x; '$0' is untraceable without BASH_XTRACEFD"
+		trace=
+	fi
+fi
+if test -n "$trace" && test -z "$verbose_log"
+then
+	verbose=t
+fi
+
 TERM=dumb
 export TERM
 
@@ -209,11 +257,22 @@ else
 	exec 4>/dev/null 3>/dev/null
 fi
 
-test_failure=0
-test_count=0
-test_fixed=0
-test_broken=0
-test_success=0
+# Send any "-x" output directly to stderr to avoid polluting tests
+# which capture stderr. We can do this unconditionally since it
+# has no effect if tracing isn't turned on.
+#
+# Note that this sets up the trace fd as soon as we assign the variable, so it
+# must come after the creation of descriptor 4 above. Likewise, we must never
+# unset this, as it has the side effect of closing descriptor 4, which we
+# use to show verbose tests to the user.
+#
+# Note also that we don't need or want to export it. The tracing is local to
+# this shell, and we would not want to influence any shells we exec.
+BASH_XTRACEFD=4
+
+# Public: The current test number, starting at 0.
+SHARNESS_TEST_NB=0
+export SHARNESS_TEST_NB
 
 die() {
 	code=$?
@@ -228,105 +287,30 @@ die() {
 EXIT_OK=
 trap 'die' EXIT
 
-# Public: Define that a test prerequisite is available.
-#
-# The prerequisite can later be checked explicitly using test_have_prereq or
-# implicitly by specifying the prerequisite name in calls to test_expect_success
-# or test_expect_failure.
-#
-# $1 - Name of prerequisite (a simple word, in all capital letters by convention)
-#
-# Examples
-#
-#   # Set PYTHON prerequisite if interpreter is available.
-#   command -v python >/dev/null && test_set_prereq PYTHON
-#
-#   # Set prerequisite depending on some variable.
-#   test -z "$NO_GETTEXT" && test_set_prereq GETTEXT
-#
-# Returns nothing.
-test_set_prereq() {
-	satisfied_prereq="$satisfied_prereq$1 "
-}
-satisfied_prereq=" "
+test_prereq=
+missing_prereq=
 
-# Public: Check if one or more test prerequisites are defined.
-#
-# The prerequisites must have previously been set with test_set_prereq.
-# The most common use of this is to skip all the tests if some essential
-# prerequisite is missing.
-#
-# $1 - Comma-separated list of test prerequisites.
-#
-# Examples
-#
-#   # Skip all remaining tests if prerequisite is not set.
-#   if ! test_have_prereq PERL; then
-#       skip_all='skipping perl interface tests, perl not available'
-#       test_done
-#   fi
-#
-# Returns 0 if all prerequisites are defined or 1 otherwise.
-test_have_prereq() {
-	# prerequisites can be concatenated with ','
-	save_IFS=$IFS
-	IFS=,
-	set -- $@
-	IFS=$save_IFS
+test_failure=0
+test_fixed=0
+test_broken=0
+test_success=0
 
-	total_prereq=0
-	ok_prereq=0
-	missing_prereq=
-
-	for prerequisite; do
-		case "$prerequisite" in
-		!*)
-			negative_prereq=t
-			prerequisite=${prerequisite#!}
-			;;
-		*)
-			negative_prereq=
-		esac
-
-		total_prereq=$((total_prereq + 1))
-		case "$satisfied_prereq" in
-		*" $prerequisite "*)
-			satisfied_this_prereq=t
-			;;
-		*)
-			satisfied_this_prereq=
-		esac
-
-		case "$satisfied_this_prereq,$negative_prereq" in
-		t,|,t)
-			ok_prereq=$((ok_prereq + 1))
-			;;
-		*)
-			# Keep a list of missing prerequisites; restore
-			# the negative marker if necessary.
-			prerequisite=${negative_prereq:+!}$prerequisite
-			if test -z "$missing_prereq"; then
-				missing_prereq=$prerequisite
-			else
-				missing_prereq="$prerequisite,$missing_prereq"
-			fi
-		esac
-	done
-
-	test $total_prereq = $ok_prereq
-}
+if test -e "$SHARNESS_TEST_SRCDIR/lib-sharness/functions.sh"
+then
+	. "$SHARNESS_TEST_SRCDIR/lib-sharness/functions.sh"
+fi
 
 # You are not expected to call test_ok_ and test_failure_ directly, use
 # the text_expect_* functions instead.
 
 test_ok_() {
 	test_success=$((test_success + 1))
-	say_color "" "ok $test_count - $*"
+	say_color "" "ok $SHARNESS_TEST_NB - $*"
 }
 
 test_failure_() {
 	test_failure=$((test_failure + 1))
-	say_color error "not ok $test_count - $1"
+	say_color error "not ok $SHARNESS_TEST_NB - $1"
 	shift
 	echo "$@" | sed -e 's/^/#	/'
 	test "$immediate" = "" || { EXIT_OK=t; exit 1; }
@@ -334,53 +318,76 @@ test_failure_() {
 
 test_known_broken_ok_() {
 	test_fixed=$((test_fixed + 1))
-	say_color error "ok $test_count - $* # TODO known breakage vanished"
+	say_color error "ok $SHARNESS_TEST_NB - $* # TODO known breakage vanished"
 }
 
 test_known_broken_failure_() {
 	test_broken=$((test_broken + 1))
-	say_color warn "not ok $test_count - $* # TODO known breakage"
+	say_color warn "not ok $SHARNESS_TEST_NB - $* # TODO known breakage"
 }
 
-# Public: Execute commands in debug mode.
-#
-# Takes a single argument and evaluates it only when the test script is started
-# with --debug. This is primarily meant for use during the development of test
-# scripts.
-#
-# $1 - Commands to be executed.
-#
-# Examples
-#
-#   test_debug "cat some_log_file"
-#
-# Returns the exit code of the last command executed in debug mode or 0
-#   otherwise.
-test_debug() {
-	test "$debug" = "" || eval "$1"
+want_trace () {
+	test "$trace" = t && {
+		test "$verbose" = t || test "$verbose_log" = t
+	}
 }
 
-# Public: Stop execution and start a shell.
-#
-# This is useful for debugging tests and only makes sense together with "-v".
-# Be sure to remove all invocations of this command before submitting.
-test_pause() {
-	if test "$verbose" = t; then
-		"$SHELL_PATH" <&6 >&3 2>&4
-	else
-		error >&5 "test_pause requires --verbose"
+# This is a separate function because some tests use
+# "return" to end a test_expect_success block early
+# (and we want to make sure we run any cleanup like
+# "set +x").
+test_eval_inner_ () {
+	# Do not add anything extra (including LF) after '$*'
+	eval "
+		want_trace && set -x
+		$*"
+}
+
+test_eval_x_ () {
+	# If "-x" tracing is in effect, then we want to avoid polluting stderr
+	# with non-test commands. But once in "set -x" mode, we cannot prevent
+	# the shell from printing the "set +x" to turn it off (nor the saving
+	# of $? before that). But we can make sure that the output goes to
+	# /dev/null.
+	#
+	# There are a few subtleties here:
+	#
+	#   - we have to redirect descriptor 4 in addition to 2, to cover
+	#     BASH_XTRACEFD
+	#
+	#   - the actual eval has to come before the redirection block (since
+	#     it needs to see descriptor 4 to set up its stderr)
+	#
+	#   - likewise, any error message we print must be outside the block to
+	#     access descriptor 4
+	#
+	#   - checking $? has to come immediately after the eval, but it must
+	#     be _inside_ the block to avoid polluting the "set -x" output
+	#
+
+	test_eval_inner_ "$@" </dev/null >&3 2>&4
+	{
+		test_eval_ret_=$?
+		if want_trace
+		then
+			set +x
+		fi
+	} 2>/dev/null 4>&2
+
+	if test "$test_eval_ret_" != 0 && want_trace
+	then
+		say_color error >&4 "error: last command exited with \$?=$test_eval_ret_"
 	fi
+	return $test_eval_ret_
 }
 
 test_eval_() {
-	# This is a separate function because some tests use
-	# "return" to end a test_expect_success block early.
 	case ",$test_prereq," in
 	*,INTERACTIVE,*)
 		eval "$*"
 		;;
 	*)
-		eval </dev/null >&3 2>&4 "$*"
+		test_eval_x_ "$@"
 		;;
 	esac
 }
@@ -392,13 +399,22 @@ test_run_() {
 	eval_ret=$?
 
 	if test "$chain_lint" = "t"; then
+		# turn off tracing for this test-eval, as it simply creates
+		# confusing noise in the "-x" output
+		trace_tmp=$trace
+		trace=
+		# 117 is magic because it is unlikely to match the exit
+		# code of other programs
 		test_eval_ "(exit 117) && $1"
 		if test "$?" != 117; then
 			error "bug in the test script: broken &&-chain: $1"
 		fi
+		trace=$trace_tmp
 	fi
 
-	if test -z "$immediate" || test $eval_ret = 0 || test -n "$expecting_failure"; then
+	if test -z "$immediate" || test $eval_ret = 0 ||
+	   test -n "$expecting_failure" && test "$test_cleanup" != ":"
+	then
 		test_eval_ "$test_cleanup"
 	fi
 	if test "$verbose" = "t" && test -n "$HARNESS_ACTIVE"; then
@@ -408,10 +424,11 @@ test_run_() {
 }
 
 test_skip_() {
-	test_count=$((test_count + 1))
+	SHARNESS_TEST_NB=$((SHARNESS_TEST_NB + 1))
 	to_skip=
 	for skp in $SKIP_TESTS; do
-		case $this_test.$test_count in
+		# shellcheck disable=SC2254
+		case $this_test.$SHARNESS_TEST_NB in
 		$skp)
 			to_skip=t
 			break
@@ -428,7 +445,7 @@ test_skip_() {
 		fi
 
 		say_color skip >&3 "skipping test: $*"
-		say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
+		say_color skip "ok $SHARNESS_TEST_NB # skip $1 (missing $missing_prereq${of_prereq})"
 		: true
 		;;
 	*)
@@ -437,6 +454,13 @@ test_skip_() {
 	esac
 }
 
+remove_trash_() {
+	test -d "$remove_trash" && (
+		cd "$(dirname "$remove_trash")" &&
+			rm -rf "$(basename "$remove_trash")"
+	)
+}
+
 # Public: Run test commands and expect them to succeed.
 #
 # When the test passed, an "ok" message is printed and the number of successful
@@ -563,246 +587,6 @@ test_expect_unstable() {
 	echo >&3 ""
 }
 
-# Public: Run command and ensure that it fails in a controlled way.
-#
-# Use it instead of "! <command>". For example, when <command> dies due to a
-# segfault, test_must_fail diagnoses it as an error, while "! <command>" would
-# mistakenly be treated as just another expected failure.
-#
-# This is one of the prefix functions to be used inside test_expect_success or
-# test_expect_failure.
-#
-# $1.. - Command to be executed.
-#
-# Examples
-#
-#   test_expect_success 'complain and die' '
-#       do something &&
-#       do something else &&
-#       test_must_fail git checkout ../outerspace
-#   '
-#
-# Returns 1 if the command succeeded (exit code 0).
-# Returns 1 if the command died by signal (exit codes 130-192)
-# Returns 1 if the command could not be found (exit code 127).
-# Returns 0 otherwise.
-test_must_fail() {
-	"$@"
-	exit_code=$?
-	if test $exit_code = 0; then
-		echo >&2 "test_must_fail: command succeeded: $*"
-		return 1
-	elif test $exit_code -gt 129 -a $exit_code -le 192; then
-		echo >&2 "test_must_fail: died by signal: $*"
-		return 1
-	elif test $exit_code = 127; then
-		echo >&2 "test_must_fail: command not found: $*"
-		return 1
-	fi
-	return 0
-}
-
-# Public: Run command and ensure that it succeeds or fails in a controlled way.
-#
-# Similar to test_must_fail, but tolerates success too. Use it instead of
-# "<command> || :" to catch failures caused by a segfault, for instance.
-#
-# This is one of the prefix functions to be used inside test_expect_success or
-# test_expect_failure.
-#
-# $1.. - Command to be executed.
-#
-# Examples
-#
-#   test_expect_success 'some command works without configuration' '
-#       test_might_fail git config --unset all.configuration &&
-#       do something
-#   '
-#
-# Returns 1 if the command died by signal (exit codes 130-192)
-# Returns 1 if the command could not be found (exit code 127).
-# Returns 0 otherwise.
-test_might_fail() {
-	"$@"
-	exit_code=$?
-	if test $exit_code -gt 129 -a $exit_code -le 192; then
-		echo >&2 "test_might_fail: died by signal: $*"
-		return 1
-	elif test $exit_code = 127; then
-		echo >&2 "test_might_fail: command not found: $*"
-		return 1
-	fi
-	return 0
-}
-
-# Public: Run command and ensure it exits with a given exit code.
-#
-# This is one of the prefix functions to be used inside test_expect_success or
-# test_expect_failure.
-#
-# $1   - Expected exit code.
-# $2.. - Command to be executed.
-#
-# Examples
-#
-#   test_expect_success 'Merge with d/f conflicts' '
-#       test_expect_code 1 git merge "merge msg" B master
-#   '
-#
-# Returns 0 if the expected exit code is returned or 1 otherwise.
-test_expect_code() {
-	want_code=$1
-	shift
-	"$@"
-	exit_code=$?
-	if test "$exit_code" = "$want_code"; then
-		return 0
-	fi
-
-	echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
-	return 1
-}
-
-# Public: Compare two files to see if expected output matches actual output.
-#
-# The TEST_CMP variable defines the command used for the comparison; it
-# defaults to "diff -u". Only when the test script was started with --verbose,
-# will the command's output, the diff, be printed to the standard output.
-#
-# This is one of the prefix functions to be used inside test_expect_success or
-# test_expect_failure.
-#
-# $1 - Path to file with expected output.
-# $2 - Path to file with actual output.
-#
-# Examples
-#
-#   test_expect_success 'foo works' '
-#       echo expected >expected &&
-#       foo >actual &&
-#       test_cmp expected actual
-#   '
-#
-# Returns the exit code of the command set by TEST_CMP.
-test_cmp() {
-	${TEST_CMP:-diff -u} "$@"
-}
-
-# Public: portably print a sequence of numbers.
-#
-# seq is not in POSIX and GNU seq might not be available everywhere,
-# so it is nice to have a seq implementation, even a very simple one.
-#
-# $1 - Starting number.
-# $2 - Ending number.
-#
-# Examples
-#
-#   test_expect_success 'foo works 10 times' '
-#       for i in $(test_seq 1 10)
-#       do
-#           foo || return
-#       done
-#   '
-#
-# Returns 0 if all the specified numbers can be displayed.
-test_seq() {
-	i="$1"
-	j="$2"
-	while test "$i" -le "$j"
-	do
-		echo "$i" || return
-		i=$(("$i" + 1))
-	done
-}
-
-# Public: Check if the file expected to be empty is indeed empty, and barfs
-# otherwise.
-#
-# $1 - File to check for emptiness.
-#
-# Returns 0 if file is empty, 1 otherwise.
-test_must_be_empty() {
-	if test -s "$1"
-	then
-		echo "'$1' is not empty, it contains:"
-		cat "$1"
-		return 1
-	fi
-}
-
-# debugging-friendly alternatives to "test [-f|-d|-e]"
-# The commands test the existence or non-existence of $1. $2 can be
-# given to provide a more precise diagnosis.
-test_path_is_file () {
-	if ! test -f "$1"
-	then
-		echo "File $1 doesn't exist. $2"
-		false
-	fi
-}
-
-test_path_is_dir () {
-	if ! test -d "$1"
-	then
-		echo "Directory $1 doesn't exist. $2"
-		false
-	fi
-}
-
-# Check if the directory exists and is empty as expected, barf otherwise.
-test_dir_is_empty () {
-	test_path_is_dir "$1" &&
-	if test -n "$(find "$1" -mindepth 1 -maxdepth 1)"
-	then
-		echo "Directory '$1' is not empty, it contains:"
-		ls -la "$1"
-		return 1
-	fi
-}
-
-# Public: Schedule cleanup commands to be run unconditionally at the end of a
-# test.
-#
-# If some cleanup command fails, the test will not pass. With --immediate, no
-# cleanup is done to help diagnose what went wrong.
-#
-# This is one of the prefix functions to be used inside test_expect_success or
-# test_expect_failure.
-#
-# $1.. - Commands to prepend to the list of cleanup commands.
-#
-# Examples
-#
-#   test_expect_success 'test core.capslock' '
-#       git config core.capslock true &&
-#       test_when_finished "git config --unset core.capslock" &&
-#       do_something
-#   '
-#
-# Returns the exit code of the last cleanup command executed.
-test_when_finished() {
-	test_cleanup="{ $*
-		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
-}
-
-# Public: Schedule cleanup commands to be run unconditionally when all tests
-# have run.
-#
-# This can be used to clean up things like test databases. It is not needed to
-# clean up temporary files, as test_done already does that.
-#
-# Examples:
-#
-#   cleanup mysql -e "DROP DATABASE mytest"
-#
-# Returns the exit code of the last cleanup command executed.
-final_cleanup=
-cleanup() {
-	final_cleanup="{ $*
-		} && (exit \"\$eval_ret\"); eval_ret=\$?; $final_cleanup"
-}
-
 # Public: Summarize test results and exit with an appropriate error code.
 #
 # Must be called at the end of each test script.
@@ -823,16 +607,17 @@ cleanup() {
 #   fi
 #
 # Returns 0 if all tests passed or 1 if there was a failure.
+# shellcheck disable=SC2154,SC2034
 test_done() {
 	EXIT_OK=t
 
 	if test -z "$HARNESS_ACTIVE"; then
-		test_results_dir="$SHARNESS_TEST_OUTPUT_DIRECTORY/test-results"
+		test_results_dir="$SHARNESS_TEST_OUTDIR/test-results"
 		mkdir -p "$test_results_dir"
 		test_results_path="$test_results_dir/$this_test.$$.counts"
 
 		cat >>"$test_results_path" <<-EOF
-		total $test_count
+		total $SHARNESS_TEST_NB
 		success $test_success
 		fixed $test_fixed
 		broken $test_broken
@@ -848,54 +633,43 @@ test_done() {
 		say_color warn "# still have $test_broken known breakage(s)"
 	fi
 	if test "$test_broken" != 0 || test "$test_fixed" != 0; then
-		test_remaining=$((test_count - test_broken - test_fixed))
+		test_remaining=$((SHARNESS_TEST_NB - test_broken - test_fixed))
 		msg="remaining $test_remaining test(s)"
 	else
-		test_remaining=$test_count
-		msg="$test_count test(s)"
+		test_remaining=$SHARNESS_TEST_NB
+		msg="$SHARNESS_TEST_NB test(s)"
 	fi
 
 	case "$test_failure" in
 	0)
 		# Maybe print SKIP message
-		if test -n "$skip_all" && test $test_count -gt 0; then
-			error "Can't use skip_all after running some tests"
-		fi
-		[ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
-
-		if test $test_remaining -gt 0; then
+		check_skip_all_
+		if test "$test_remaining" -gt 0; then
 			say_color pass "# passed all $msg"
 		fi
-		say "1..$test_count$skip_all"
+		say "1..$SHARNESS_TEST_NB$skip_all"
 
 		test_eval_ "$final_cleanup"
 
-		test -d "$remove_trash" &&
-		cd "$(dirname "$remove_trash")" &&
-		rm -rf "$(basename "$remove_trash")"
+		remove_trash_
 
 		exit 0 ;;
 
 	*)
 		say_color error "# failed $test_failure among $msg"
-		say "1..$test_count"
+		say "1..$SHARNESS_TEST_NB"
 
 		exit 1 ;;
 
 	esac
 }
 
-# Public: Source directory of test code and sharness library.
-# This directory may be different from the directory in which tests are
-# being run.
-: "${SHARNESS_TEST_SRCDIR:=$(cd "$(dirname "$0")" && pwd)}"
-export SHARNESS_TEST_SRCDIR
-
+: "${SHARNESS_BUILD_DIRECTORY:="$SHARNESS_TEST_DIRECTORY/.."}"
 # Public: Build directory that will be added to PATH. By default, it is set to
 # the parent directory of SHARNESS_TEST_DIRECTORY.
-: "${SHARNESS_BUILD_DIRECTORY:="$SHARNESS_TEST_DIRECTORY/.."}"
+export SHARNESS_BUILD_DIRECTORY
 PATH="$SHARNESS_BUILD_DIRECTORY:$PATH"
-export PATH SHARNESS_BUILD_DIRECTORY
+export PATH
 
 # Public: Path to test script currently executed.
 SHARNESS_TEST_FILE="$0"
@@ -906,7 +680,7 @@ SHARNESS_TRASH_DIRECTORY="trash directory.$(basename "$SHARNESS_TEST_FILE" ".$SH
 test -n "$root" && SHARNESS_TRASH_DIRECTORY="$root/$SHARNESS_TRASH_DIRECTORY"
 case "$SHARNESS_TRASH_DIRECTORY" in
 /*) ;; # absolute path is good
- *) SHARNESS_TRASH_DIRECTORY="$SHARNESS_TEST_OUTPUT_DIRECTORY/$SHARNESS_TRASH_DIRECTORY" ;;
+ *) SHARNESS_TRASH_DIRECTORY="$SHARNESS_TEST_OUTDIR/$SHARNESS_TRASH_DIRECTORY" ;;
 esac
 test "$debug" = "t" || remove_trash="$SHARNESS_TRASH_DIRECTORY"
 rm -rf "$SHARNESS_TRASH_DIRECTORY" || {
@@ -917,11 +691,11 @@ rm -rf "$SHARNESS_TRASH_DIRECTORY" || {
 
 
 #
-#  Load any extensions in $srcdir/sharness.d/*.sh
+#  Load any extensions in $testdir/sharness.d/*.sh
 #
-if test -d "${SHARNESS_TEST_SRCDIR}/sharness.d"
+if test -d "${SHARNESS_TEST_DIRECTORY}/sharness.d"
 then
-	for file in "${SHARNESS_TEST_SRCDIR}"/sharness.d/*.sh
+	for file in "${SHARNESS_TEST_DIRECTORY}"/sharness.d/*.sh
 	do
 		# Ensure glob was not an empty match:
 		test -e "${file}" || break
@@ -930,6 +704,7 @@ then
 		then
 			echo >&5 "sharness: loading extensions from ${file}"
 		fi
+		# shellcheck disable=SC1090
 		. "${file}"
 		if test $? != 0
 		then
@@ -946,14 +721,28 @@ export SHARNESS_TRASH_DIRECTORY
 HOME="$SHARNESS_TRASH_DIRECTORY"
 export HOME
 
+# shellcheck disable=SC3028
+if [ "$OSTYPE" = msys ]; then
+	USERPROFILE="$SHARNESS_TRASH_DIRECTORY"
+	export USERPROFILE
+fi
+
 mkdir -p "$SHARNESS_TRASH_DIRECTORY" || exit 1
 # Use -P to resolve symlinks in our working directory so that the cwd
 # in subprocesses like git equals our $PWD (for pathname comparisons).
 cd -P "$SHARNESS_TRASH_DIRECTORY" || exit 1
 
+check_skip_all_() {
+	if test -n "$skip_all" && test $SHARNESS_TEST_NB -gt 0; then
+		error "Can't use skip_all after running some tests"
+	fi
+	[ -z "$skip_all" ] || skip_all=" # SKIP $skip_all"
+}
+
 this_test=${SHARNESS_TEST_FILE##*/}
-this_test=${this_test%.$SHARNESS_TEST_EXTENSION}
+this_test=${this_test%".$SHARNESS_TEST_EXTENSION"}
 for skp in $SKIP_TESTS; do
+	# shellcheck disable=SC2254
 	case "$this_test" in
 	$skp)
 		say_color info >&3 "skipping test $this_test altogether"

t/test-lib.sh

@@ -29,6 +29,83 @@ SHARNESS_BUILD_DIRECTORY="$(mktemp -d)"
 export PATH="${PATH#*:}"
 rmdir "$SHARNESS_BUILD_DIRECTORY"
 
+GIT_AUTHOR_EMAIL=author@example.com
+GIT_AUTHOR_NAME='A U Thor'
+GIT_COMMITTER_EMAIL=committer@example.com
+GIT_COMMITTER_NAME='C O Mitter'
+export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
+export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
+
+# maintain backwards compatible default
+# (as used in remote helper)
+git config --global init.defaultBranch master
+git config --global protocol.file.allow always
+
+unset XDG_CONFIG_HOME
+
+test_set_prereq() {
+	satisfied_prereq="$satisfied_prereq$1 "
+}
+satisfied_prereq=" "
+
+case "$(uname -s)" in
+MSYS*|MINGW*)
+	test_set_prereq WIN
+	export TEST_CMP='diff --strip-trailing-cr -u'
+	;;
+esac
+
+test_cmp() {
+	${TEST_CMP:-diff -u} "$@"
+}
+
+test_when_finished() {
+	test_cleanup="{ $*
+		} && (exit \"\$eval_ret\"); eval_ret=\$?; $test_cleanup"
+}
+
+test_expect_code() {
+	want_code=$1
+	shift
+	"$@"
+	exit_code=$?
+	if test "$exit_code" = "$want_code"; then
+		return 0
+	fi
+
+	echo >&2 "test_expect_code: command exited with $exit_code, we wanted $want_code $*"
+	return 1
+}
+
+test_have_prereq() {
+	prerequisite=$1
+
+	case "$prerequisite" in
+	!*)
+		negative_prereq=t
+		prerequisite=${prerequisite#!}
+		;;
+	*)
+		negative_prereq=
+	esac
+
+	case "$satisfied_prereq" in
+	*" $prerequisite "*)
+		satisfied_this_prereq=t
+		;;
+	*)
+		satisfied_this_prereq=
+	esac
+
+	case "$satisfied_this_prereq,$negative_prereq" in
+	t,|,t)
+		return 0
+		;;
+	esac
+
+	return 1
+}
+
 if [ -z "$TEST_INSTALLED_SCRIPTS" ] ; then
 	if [ -n "$PYTHON" ] && "$PYTHON" -c 'import mercurial' 2> /dev/null ; then
 		: Use chosen Python version
@@ -57,22 +134,3 @@ else
 	# The build/install process ensures Python is available
 	test_set_prereq PYTHON
 fi
-
-GIT_AUTHOR_EMAIL=author@example.com
-GIT_AUTHOR_NAME='A U Thor'
-GIT_COMMITTER_EMAIL=committer@example.com
-GIT_COMMITTER_NAME='C O Mitter'
-export GIT_AUTHOR_EMAIL GIT_AUTHOR_NAME
-export GIT_COMMITTER_EMAIL GIT_COMMITTER_NAME
-
-# maintain backwards compatible default
-# (as used in remote helper)
-git config --global init.defaultBranch master
-git config --global protocol.file.allow always
-
-unset XDG_CONFIG_HOME
-
-if [[ $(uname -s) = MSYS* ]]; then
-	test_set_prereq WIN
-	export TEST_CMP='diff --strip-trailing-cr -u'
-fi

tools/versions.txt

@@ -44,3 +44,4 @@
 6.7
 6.8
 6.9
+7.0