Merge pull request #1897 from piscisaureus/symlink-attr

Specify symlink type in .gitattributes
2026-01-17 14:21:57 +00:00 · 2018-10-31 15:08:16 +01:00
parent 2e9cc4c8c1 a759d2af85
commit f8857d6904
25 changed files with 838 additions and 247 deletions
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -294,9 +294,9 @@ docdep_prereqs = \
 	cmd-list.made $(cmds_txt)

 doc.dep : $(docdep_prereqs) $(wildcard *.txt) $(wildcard config/*.txt) build-docdep.perl
-	$(QUIET_GEN)$(RM) $@+ $@ && \
-	$(PERL_PATH) ./build-docdep.perl >$@+ $(QUIET_STDERR) && \
-	mv $@+ $@
+	$(QUIET_GEN)$(RM) $@.new $@ && \
+	$(PERL_PATH) ./build-docdep.perl >$@.new $(QUIET_STDERR) && \
+	mv $@.new $@

 -include doc.dep

@@ -332,8 +332,8 @@ mergetools-list.made: ../git-mergetool--lib.sh $(wildcard ../mergetools/*)
 	date >$@

 clean:
-	$(RM) *.xml *.xml+ *.html *.html+ *.1 *.5 *.7
-	$(RM) *.texi *.texi+ *.texi++ git.info gitman.info
+	$(RM) *.xml *.xml.new *.html *.html.new *.1 *.5 *.7
+	$(RM) *.texi *.texi.new *.texi.new.new git.info gitman.info
 	$(RM) *.pdf
 	$(RM) howto-index.txt howto/*.html doc.dep
 	$(RM) technical/*.html technical/api-index.txt
@@ -342,14 +342,14 @@ clean:
 	$(RM) manpage-base-url.xsl

 $(MAN_HTML): %.html : %.txt asciidoc.conf
-	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
-	$(TXT_TO_HTML) -d manpage -o $@+ $< && \
-	mv $@+ $@
+	$(QUIET_ASCIIDOC)$(RM) $@.new $@ && \
+	$(TXT_TO_HTML) -d manpage -o $@.new $< && \
+	mv $@.new $@

 $(OBSOLETE_HTML): %.html : %.txto asciidoc.conf
-	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
-	$(TXT_TO_HTML) -o $@+ $< && \
-	mv $@+ $@
+	$(QUIET_ASCIIDOC)$(RM) $@.new $@ && \
+	$(TXT_TO_HTML) -o $@.new $< && \
+	mv $@.new $@

 manpage-base-url.xsl: manpage-base-url.xsl.in
 	$(QUIET_GEN)sed "s|@@MAN_BASE_URL@@|$(MAN_BASE_URL)|" $< > $@
@@ -359,14 +359,14 @@ manpage-base-url.xsl: manpage-base-url.xsl.in
 	$(XMLTO) -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<

 %.xml : %.txt asciidoc.conf
-	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
-	$(TXT_TO_XML) -d manpage -o $@+ $< && \
-	mv $@+ $@
+	$(QUIET_ASCIIDOC)$(RM) $@.new $@ && \
+	$(TXT_TO_XML) -d manpage -o $@.new $< && \
+	mv $@.new $@

 user-manual.xml: user-manual.txt user-manual.conf
-	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
-	$(TXT_TO_XML) -d book -o $@+ $< && \
-	mv $@+ $@
+	$(QUIET_ASCIIDOC)$(RM) $@.new $@ && \
+	$(TXT_TO_XML) -d book -o $@.new $< && \
+	mv $@.new $@

 technical/api-index.txt: technical/api-index-skel.txt \
 	technical/api-index.sh $(patsubst %,%.txt,$(API_DOCS))
@@ -383,46 +383,46 @@ XSLT = docbook.xsl
 XSLTOPTS = --xinclude --stringparam html.stylesheet docbook-xsl.css

 user-manual.html: user-manual.xml $(XSLT)
-	$(QUIET_XSLTPROC)$(RM) $@+ $@ && \
-	xsltproc $(XSLTOPTS) -o $@+ $(XSLT) $< && \
-	mv $@+ $@
+	$(QUIET_XSLTPROC)$(RM) $@.new $@ && \
+	xsltproc $(XSLTOPTS) -o $@.new $(XSLT) $< && \
+	mv $@.new $@

 git.info: user-manual.texi
 	$(QUIET_MAKEINFO)$(MAKEINFO) --no-split -o $@ user-manual.texi

 user-manual.texi: user-manual.xml
-	$(QUIET_DB2TEXI)$(RM) $@+ $@ && \
-	$(DOCBOOK2X_TEXI) user-manual.xml --encoding=UTF-8 --to-stdout >$@++ && \
-	$(PERL_PATH) fix-texi.perl <$@++ >$@+ && \
-	rm $@++ && \
-	mv $@+ $@
+	$(QUIET_DB2TEXI)$(RM) $@.new $@ && \
+	$(DOCBOOK2X_TEXI) user-manual.xml --encoding=UTF-8 --to-stdout >$@.new.new && \
+	$(PERL_PATH) fix-texi.perl <$@.new.new >$@.new && \
+	rm $@.new.new && \
+	mv $@.new $@

 user-manual.pdf: user-manual.xml
-	$(QUIET_DBLATEX)$(RM) $@+ $@ && \
-	$(DBLATEX) -o $@+ $(DBLATEX_COMMON) $< && \
-	mv $@+ $@
+	$(QUIET_DBLATEX)$(RM) $@.new $@ && \
+	$(DBLATEX) -o $@.new $(DBLATEX_COMMON) $< && \
+	mv $@.new $@

 gitman.texi: $(MAN_XML) cat-texi.perl texi.xsl
-	$(QUIET_DB2TEXI)$(RM) $@+ $@ && \
-	($(foreach xml,$(sort $(MAN_XML)),xsltproc -o $(xml)+ texi.xsl $(xml) && \
-		$(DOCBOOK2X_TEXI) --encoding=UTF-8 --to-stdout $(xml)+ && \
-		rm $(xml)+ &&) true) > $@++ && \
-	$(PERL_PATH) cat-texi.perl $@ <$@++ >$@+ && \
-	rm $@++ && \
-	mv $@+ $@
+	$(QUIET_DB2TEXI)$(RM) $@.new $@ && \
+	($(foreach xml,$(sort $(MAN_XML)),xsltproc -o $(xml).new texi.xsl $(xml) && \
+		$(DOCBOOK2X_TEXI) --encoding=UTF-8 --to-stdout $(xml).new && \
+		rm $(xml).new &&) true) > $@.new.new && \
+	$(PERL_PATH) cat-texi.perl $@ <$@.new.new >$@.new && \
+	rm $@.new.new && \
+	mv $@.new $@

 gitman.info: gitman.texi
 	$(QUIET_MAKEINFO)$(MAKEINFO) --no-split --no-validate $*.texi

 $(patsubst %.txt,%.texi,$(MAN_TXT)): %.texi : %.xml
-	$(QUIET_DB2TEXI)$(RM) $@+ $@ && \
-	$(DOCBOOK2X_TEXI) --to-stdout $*.xml >$@+ && \
-	mv $@+ $@
+	$(QUIET_DB2TEXI)$(RM) $@.new $@ && \
+	$(DOCBOOK2X_TEXI) --to-stdout $*.xml >$@.new && \
+	mv $@.new $@

 howto-index.txt: howto-index.sh $(wildcard howto/*.txt)
-	$(QUIET_GEN)$(RM) $@+ $@ && \
-	'$(SHELL_PATH_SQ)' ./howto-index.sh $(sort $(wildcard howto/*.txt)) >$@+ && \
-	mv $@+ $@
+	$(QUIET_GEN)$(RM) $@.new $@ && \
+	'$(SHELL_PATH_SQ)' ./howto-index.sh $(sort $(wildcard howto/*.txt)) >$@.new && \
+	mv $@.new $@

 $(patsubst %,%.html,$(ARTICLES)) : %.html : %.txt
 	$(QUIET_ASCIIDOC)$(TXT_TO_HTML) $*.txt
@@ -431,10 +431,10 @@ WEBDOC_DEST = /pub/software/scm/git/docs

 howto/%.html: ASCIIDOC_EXTRA += -a git-relative-html-prefix=../
 $(patsubst %.txt,%.html,$(wildcard howto/*.txt)): %.html : %.txt
-	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
+	$(QUIET_ASCIIDOC)$(RM) $@.new $@ && \
 	sed -e '1,/^$$/d' $< | \
-	$(TXT_TO_HTML) - >$@+ && \
-	mv $@+ $@
+	$(TXT_TO_HTML) - >$@.new && \
+	mv $@.new $@

 install-webdoc : html
 	'$(SHELL_PATH_SQ)' ./install-webdoc.sh $(WEBDOC_DEST)
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -382,6 +382,36 @@ sign `$` upon checkout.  Any byte sequence that begins with
 with `$Id$` upon check-in.


+`symlink`
+^^^^^^^^^
+
+On Windows, symbolic links have a type: a "file symlink" must point at
+a file, and a "directory symlink" must point at a directory. If the
+type of symlink does not match its target, it doesn't work.
+
+Git does not record the type of symlink in the index or in a tree. On
+checkout it'll guess the type, which only works if the target exists
+at the time the symlink is created. This may often not be the case,
+for example when the link points at a directory inside a submodule.
+
+The `symlink` attribute allows you to explicitly set the type of symlink
+to `file` or `dir`, so Git doesn't have to guess. If you have a set of
+symlinks that point at other files, you can do:
+
+------------------------
+*.gif 	symlink=file
+------------------------
+
+To tell Git that a symlink points at a directory, use:
+
+------------------------
+tools_folder 	symlink=dir
+------------------------
+
+The `symlink` attribute is ignored on platforms other than Windows,
+since they don't distinguish between different types of symlinks.
+
+
 `filter`
 ^^^^^^^^

--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -578,6 +578,7 @@ static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
 			       clean_get_color(CLEAN_COLOR_RESET));
 		}

+		fflush(stdout);
 		if (strbuf_getline_lf(&choice, stdin) != EOF) {
 			strbuf_trim(&choice);
 		} else {
@@ -660,6 +661,7 @@ static int filter_by_patterns_cmd(void)
 		clean_print_color(CLEAN_COLOR_PROMPT);
 		printf(_("Input ignore patterns>> "));
 		clean_print_color(CLEAN_COLOR_RESET);
+		fflush(stdout);
 		if (strbuf_getline_lf(&confirm, stdin) != EOF)
 			strbuf_trim(&confirm);
 		else
@@ -758,6 +760,7 @@ static int ask_each_cmd(void)
 			qname = quote_path_relative(item->string, NULL, &buf);
 			/* TRANSLATORS: Make sure to keep [y/N] as is */
 			printf(_("Remove %s [y/N]? "), qname);
+			fflush(stdout);
 			if (strbuf_getline_lf(&confirm, stdin) != EOF) {
 				strbuf_trim(&confirm);
 			} else {
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -2,17 +2,17 @@
 #include "win32.h"
 #include <conio.h>
 #include <wchar.h>
+#include <winioctl.h>
 #include "../strbuf.h"
 #include "../run-command.h"
 #include "../cache.h"
 #include "win32/lazyload.h"
 #include "../config.h"
 #include "dir.h"
+#include "../attr.h"

 #define HCAST(type, handle) ((type)(intptr_t)handle)

-static const int delay[] = { 0, 1, 10, 20, 40 };
-
 void open_in_gdb(void)
 {
 	static struct child_process cp = CHILD_PROCESS_INIT;
@@ -88,6 +88,7 @@ int err_win_to_posix(DWORD winerr)
 	case ERROR_INVALID_PARAMETER: error = EINVAL; break;
 	case ERROR_INVALID_PASSWORD: error = EPERM; break;
 	case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
+	case ERROR_INVALID_REPARSE_DATA: error = EINVAL; break;
 	case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
 	case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
 	case ERROR_INVALID_WORKSTATION: error = EACCES; break;
@@ -102,6 +103,7 @@ int err_win_to_posix(DWORD winerr)
 	case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
 	case ERROR_NOACCESS: error = EFAULT; break;
 	case ERROR_NONE_MAPPED: error = EINVAL; break;
+	case ERROR_NOT_A_REPARSE_POINT: error = EINVAL; break;
 	case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
 	case ERROR_NOT_READY: error = EAGAIN; break;
 	case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
@@ -122,6 +124,9 @@ int err_win_to_posix(DWORD winerr)
 	case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
 	case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
 	case ERROR_READ_FAULT: error = EIO; break;
+	case ERROR_REPARSE_ATTRIBUTE_CONFLICT: error = EINVAL; break;
+	case ERROR_REPARSE_TAG_INVALID: error = EINVAL; break;
+	case ERROR_REPARSE_TAG_MISMATCH: error = EINVAL; break;
 	case ERROR_SEEK: error = EIO; break;
 	case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
 	case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
@@ -188,15 +193,12 @@ static int read_yes_no_answer(void)
 	return -1;
 }

-static int ask_yes_no_if_possible(const char *format, ...)
+static int ask_yes_no_if_possible(const char *format, va_list args)
 {
 	char question[4096];
 	const char *retry_hook[] = { NULL, NULL, NULL };
-	va_list args;

-	va_start(args, format);
 	vsnprintf(question, sizeof(question), format, args);
-	va_end(args);

 	if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
 		retry_hook[1] = question;
@@ -218,6 +220,31 @@ static int ask_yes_no_if_possible(const char *format, ...)
 	}
 }

+static int retry_ask_yes_no(int *tries, const char *format, ...)
+{
+	static const int delay[] = { 0, 1, 10, 20, 40 };
+	va_list args;
+	int result, saved_errno = errno;
+
+	if ((*tries) < ARRAY_SIZE(delay)) {
+		/*
+		 * We assume that some other process had the file open at the wrong
+		 * moment and retry. In order to give the other process a higher
+		 * chance to complete its operation, we give up our time slice now.
+		 * If we have to retry again, we do sleep a bit.
+		 */
+		Sleep(delay[*tries]);
+		(*tries)++;
+		return 1;
+	}
+
+	va_start(args, format);
+	result = ask_yes_no_if_possible(format, args);
+	va_end(args);
+	errno = saved_errno;
+	return result;
+}
+
 /* Windows only */
 enum hide_dotfiles_type {
 	HIDE_DOTFILES_FALSE = 0,
@@ -259,6 +286,182 @@ int mingw_core_config(const char *var, const char *value, void *cb)
 	return 0;
 }

+static DWORD symlink_file_flags = 0, symlink_directory_flags = 1;
+
+enum phantom_symlink_result {
+	PHANTOM_SYMLINK_RETRY,
+	PHANTOM_SYMLINK_DONE,
+	PHANTOM_SYMLINK_DIRECTORY
+};
+
+static inline int is_wdir_sep(wchar_t wchar)
+{
+	return wchar == L'/' || wchar == L'\\';
+}
+
+static const wchar_t *make_relative_to(const wchar_t *path,
+				       const wchar_t *relative_to, wchar_t *out,
+				       size_t size)
+{
+	size_t i = wcslen(relative_to), len;
+
+	/* Is `path` already absolute? */
+	if (is_wdir_sep(path[0]) ||
+	    (iswalpha(path[0]) && path[1] == L':' && is_wdir_sep(path[2])))
+		return path;
+
+	while (i > 0 && !is_wdir_sep(relative_to[i - 1]))
+		i--;
+
+	/* Is `relative_to` in the current directory? */
+	if (!i)
+		return path;
+
+	len = wcslen(path);
+	if (i + len + 1 > size) {
+		error("Could not make '%S' relative to '%S' (too large)",
+		      path, relative_to);
+		return NULL;
+	}
+
+	memcpy(out, relative_to, i * sizeof(wchar_t));
+	wcscpy(out + i, path);
+	return out;
+}
+
+/*
+ * Changes a file symlink to a directory symlink if the target exists and is a
+ * directory.
+ */
+static enum phantom_symlink_result
+process_phantom_symlink(const wchar_t *wtarget, const wchar_t *wlink)
+{
+	HANDLE hnd;
+	BY_HANDLE_FILE_INFORMATION fdata;
+	wchar_t relative[MAX_LONG_PATH];
+	const wchar_t *rel;
+
+	/* check that wlink is still a file symlink */
+	if ((GetFileAttributesW(wlink)
+			& (FILE_ATTRIBUTE_REPARSE_POINT | FILE_ATTRIBUTE_DIRECTORY))
+			!= FILE_ATTRIBUTE_REPARSE_POINT)
+		return PHANTOM_SYMLINK_DONE;
+
+	/* make it relative, if necessary */
+	rel = make_relative_to(wtarget, wlink, relative, ARRAY_SIZE(relative));
+	if (!rel)
+		return PHANTOM_SYMLINK_DONE;
+
+	/* let Windows resolve the link by opening it */
+	hnd = CreateFileW(rel, 0,
+			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+			OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+	if (hnd == INVALID_HANDLE_VALUE) {
+		errno = err_win_to_posix(GetLastError());
+		return PHANTOM_SYMLINK_RETRY;
+	}
+
+	if (!GetFileInformationByHandle(hnd, &fdata)) {
+		errno = err_win_to_posix(GetLastError());
+		CloseHandle(hnd);
+		return PHANTOM_SYMLINK_RETRY;
+	}
+	CloseHandle(hnd);
+
+	/* if target exists and is a file, we're done */
+	if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
+		return PHANTOM_SYMLINK_DONE;
+
+	/* otherwise recreate the symlink with directory flag */
+	if (DeleteFileW(wlink) &&
+	    CreateSymbolicLinkW(wlink, wtarget, symlink_directory_flags))
+		return PHANTOM_SYMLINK_DIRECTORY;
+
+	errno = err_win_to_posix(GetLastError());
+	return PHANTOM_SYMLINK_RETRY;
+}
+
+/* keep track of newly created symlinks to non-existing targets */
+struct phantom_symlink_info {
+	struct phantom_symlink_info *next;
+	wchar_t *wlink;
+	wchar_t *wtarget;
+};
+
+static struct phantom_symlink_info *phantom_symlinks = NULL;
+static CRITICAL_SECTION phantom_symlinks_cs;
+
+static void process_phantom_symlinks(void)
+{
+	struct phantom_symlink_info *current, **psi;
+	EnterCriticalSection(&phantom_symlinks_cs);
+	/* process phantom symlinks list */
+	psi = &phantom_symlinks;
+	while ((current = *psi)) {
+		enum phantom_symlink_result result = process_phantom_symlink(
+				current->wtarget, current->wlink);
+		if (result == PHANTOM_SYMLINK_RETRY) {
+			psi = &current->next;
+		} else {
+			/* symlink was processed, remove from list */
+			*psi = current->next;
+			free(current);
+			/* if symlink was a directory, start over */
+			if (result == PHANTOM_SYMLINK_DIRECTORY)
+				psi = &phantom_symlinks;
+		}
+	}
+	LeaveCriticalSection(&phantom_symlinks_cs);
+}
+
+static int create_phantom_symlink(wchar_t *wtarget, wchar_t *wlink)
+{
+	int len;
+
+	/* create file symlink */
+	if (!CreateSymbolicLinkW(wlink, wtarget, symlink_file_flags)) {
+		errno = err_win_to_posix(GetLastError());
+		return -1;
+	}
+
+	/* convert to directory symlink if target exists */
+	switch (process_phantom_symlink(wtarget, wlink)) {
+	case PHANTOM_SYMLINK_RETRY: {
+		/* if target doesn't exist, add to phantom symlinks list */
+		wchar_t wfullpath[MAX_LONG_PATH];
+		struct phantom_symlink_info *psi;
+
+		/* convert to absolute path to be independent of cwd */
+		len = GetFullPathNameW(wlink, MAX_LONG_PATH, wfullpath, NULL);
+		if (!len || len >= MAX_LONG_PATH) {
+			errno = err_win_to_posix(GetLastError());
+			return -1;
+		}
+
+		/* over-allocate and fill phantom_symlink_info structure */
+		psi = xmalloc(sizeof(struct phantom_symlink_info) +
+			      sizeof(wchar_t) * (len + wcslen(wtarget) + 2));
+		psi->wlink = (wchar_t *)(psi + 1);
+		wcscpy(psi->wlink, wfullpath);
+		psi->wtarget = psi->wlink + len + 1;
+		wcscpy(psi->wtarget, wtarget);
+
+		EnterCriticalSection(&phantom_symlinks_cs);
+		psi->next = phantom_symlinks;
+		phantom_symlinks = psi;
+		LeaveCriticalSection(&phantom_symlinks_cs);
+		break;
+	}
+	case PHANTOM_SYMLINK_DIRECTORY:
+		/* if we created a dir symlink, process other phantom symlinks */
+		process_phantom_symlinks();
+		break;
+	default:
+		break;
+	}
+	return 0;
+}
+
 /* Normalizes NT paths as returned by some low-level APIs. */
 static wchar_t *normalize_ntpath(wchar_t *wbuf)
 {
@@ -286,31 +489,28 @@ static wchar_t *normalize_ntpath(wchar_t *wbuf)

 int mingw_unlink(const char *pathname)
 {
-	int ret, tries = 0;
+	int tries = 0;
 	wchar_t wpathname[MAX_LONG_PATH];
 	if (xutftowcs_long_path(wpathname, pathname) < 0)
 		return -1;

-	/* read-only files cannot be removed */
-	_wchmod(wpathname, 0666);
-	while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
+	do {
+		/* read-only files cannot be removed */
+		_wchmod(wpathname, 0666);
+		if (!_wunlink(wpathname))
+			return 0;
 		if (!is_file_in_use_error(GetLastError()))
 			break;
 		/*
-		 * We assume that some other process had the source or
-		 * destination file open at the wrong moment and retry.
-		 * In order to give the other process a higher chance to
-		 * complete its operation, we give up our time slice now.
-		 * If we have to retry again, we do sleep a bit.
+		 * _wunlink() / DeleteFileW() for directory symlinks fails with
+		 * ERROR_ACCESS_DENIED (EACCES), so try _wrmdir() as well. This is the
+		 * same error we get if a file is in use (already checked above).
 		 */
-		Sleep(delay[tries]);
-		tries++;
-	}
-	while (ret == -1 && is_file_in_use_error(GetLastError()) &&
-	       ask_yes_no_if_possible("Unlink of file '%s' failed. "
-			"Should I try again?", pathname))
-	       ret = _wunlink(wpathname);
-	return ret;
+		if (!_wrmdir(wpathname))
+			return 0;
+	} while (retry_ask_yes_no(&tries, "Unlink of file '%s' failed. "
+			"Should I try again?", pathname));
+	return -1;
 }

 static int is_dir_empty(const wchar_t *wpath)
@@ -337,12 +537,14 @@ static int is_dir_empty(const wchar_t *wpath)

 int mingw_rmdir(const char *pathname)
 {
-	int ret, tries = 0;
+	int tries = 0;
 	wchar_t wpathname[MAX_LONG_PATH];
 	if (xutftowcs_long_path(wpathname, pathname) < 0)
 		return -1;

-	while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
+	do {
+		if (!_wrmdir(wpathname))
+			return 0;
 		if (!is_file_in_use_error(GetLastError()))
 			errno = err_win_to_posix(GetLastError());
 		if (errno != EACCES)
@@ -351,21 +553,9 @@ int mingw_rmdir(const char *pathname)
 			errno = ENOTEMPTY;
 			break;
 		}
-		/*
-		 * We assume that some other process had the source or
-		 * destination file open at the wrong moment and retry.
-		 * In order to give the other process a higher chance to
-		 * complete its operation, we give up our time slice now.
-		 * If we have to retry again, we do sleep a bit.
-		 */
-		Sleep(delay[tries]);
-		tries++;
-	}
-	while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
-	       ask_yes_no_if_possible("Deletion of directory '%s' failed. "
-			"Should I try again?", pathname))
-	       ret = _wrmdir(wpathname);
-	return ret;
+	} while (retry_ask_yes_no(&tries, "Deletion of directory '%s' failed. "
+			"Should I try again?", pathname));
+	return -1;
 }

 static inline int needs_hiding(const char *path)
@@ -421,6 +611,8 @@ int mingw_mkdir(const char *path, int mode)
 		return -1;

 	ret = _wmkdir(wpath);
+	if (!ret)
+		process_phantom_symlinks();
 	if (!ret && needs_hiding(path))
 		return set_hidden_flag(wpath, 1);
 	return ret;
@@ -659,7 +851,24 @@ int mingw_chdir(const char *dirname)
 	wchar_t wdirname[MAX_LONG_PATH];
 	if (xutftowcs_long_path(wdirname, dirname) < 0)
 		return -1;
-	result = _wchdir(wdirname);
+
+	if (has_symlinks) {
+		HANDLE hnd = CreateFileW(wdirname, 0,
+				FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+				OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+		if (hnd == INVALID_HANDLE_VALUE) {
+			errno = err_win_to_posix(GetLastError());
+			return -1;
+		}
+		if (!GetFinalPathNameByHandleW(hnd, wdirname, ARRAY_SIZE(wdirname), 0)) {
+			errno = err_win_to_posix(GetLastError());
+			CloseHandle(hnd);
+			return -1;
+		}
+		CloseHandle(hnd);
+	}
+
+	result = _wchdir(normalize_ntpath(wdirname));
 	current_directory_len = GetCurrentDirectoryW(0, NULL);
 	return result;
 }
@@ -705,53 +914,46 @@ static int has_valid_directory_prefix(wchar_t *wfilename)
 	return 1;
 }

-/* We keep the do_lstat code in a separate function to avoid recursion.
- * When a path ends with a slash, the stat will fail with ENOENT. In
- * this case, we strip the trailing slashes and stat again.
- *
- * If follow is true then act like stat() and report on the link
- * target. Otherwise report on the link itself.
- */
-static int do_lstat(int follow, const char *file_name, struct stat *buf)
+int mingw_lstat(const char *file_name, struct stat *buf)
 {
 	WIN32_FILE_ATTRIBUTE_DATA fdata;
+	WIN32_FIND_DATAW findbuf = { 0 };
 	wchar_t wfilename[MAX_LONG_PATH];
-	if (xutftowcs_long_path(wfilename, file_name) < 0)
+	int wlen = xutftowcs_long_path(wfilename, file_name);
+	if (wlen < 0)
 		return -1;

+	/* strip trailing '/', or GetFileAttributes will fail */
+	while (wlen && is_dir_sep(wfilename[wlen - 1]))
+		wfilename[--wlen] = 0;
+	if (!wlen) {
+		errno = ENOENT;
+		return -1;
+	}
+
 	if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
+		/* for reparse points, use FindFirstFile to get the reparse tag */
+		if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
+			HANDLE handle = FindFirstFileW(wfilename, &findbuf);
+			if (handle == INVALID_HANDLE_VALUE)
+				goto error;
+			FindClose(handle);
+		}
 		buf->st_ino = 0;
 		buf->st_gid = 0;
 		buf->st_uid = 0;
 		buf->st_nlink = 1;
-		buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
-		buf->st_size = fdata.nFileSizeLow |
-			(((off_t)fdata.nFileSizeHigh)<<32);
+		buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes,
+				findbuf.dwReserved0);
+		buf->st_size = S_ISLNK(buf->st_mode) ? MAX_LONG_PATH :
+			fdata.nFileSizeLow | (((off_t) fdata.nFileSizeHigh) << 32);
 		buf->st_dev = buf->st_rdev = 0; /* not used by Git */
 		filetime_to_timespec(&(fdata.ftLastAccessTime), &(buf->st_atim));
 		filetime_to_timespec(&(fdata.ftLastWriteTime), &(buf->st_mtim));
 		filetime_to_timespec(&(fdata.ftCreationTime), &(buf->st_ctim));
-		if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
-			WIN32_FIND_DATAW findbuf;
-			HANDLE handle = FindFirstFileW(wfilename, &findbuf);
-			if (handle != INVALID_HANDLE_VALUE) {
-				if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
-						(findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
-					if (follow) {
-						char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
-						buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
-					} else {
-						buf->st_mode = S_IFLNK;
-					}
-					buf->st_mode |= S_IREAD;
-					if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
-						buf->st_mode |= S_IWRITE;
-				}
-				FindClose(handle);
-			}
-		}
 		return 0;
 	}
+error:
 	switch (GetLastError()) {
 	case ERROR_ACCESS_DENIED:
 	case ERROR_SHARING_VIOLATION:
@@ -778,39 +980,6 @@ static int do_lstat(int follow, const char *file_name, struct stat *buf)
 	return -1;
 }

-/* We provide our own lstat/fstat functions, since the provided
- * lstat/fstat functions are so slow. These stat functions are
- * tailored for Git's usage (read: fast), and are not meant to be
- * complete. Note that Git stat()s are redirected to mingw_lstat()
- * too, since Windows doesn't really handle symlinks that well.
- */
-static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
-{
-	int namelen;
-	char alt_name[MAX_LONG_PATH];
-
-	if (!do_lstat(follow, file_name, buf))
-		return 0;
-
-	/* if file_name ended in a '/', Windows returned ENOENT;
-	 * try again without trailing slashes
-	 */
-	if (errno != ENOENT)
-		return -1;
-
-	namelen = strlen(file_name);
-	if (namelen && file_name[namelen-1] != '/')
-		return -1;
-	while (namelen && file_name[namelen-1] == '/')
-		--namelen;
-	if (!namelen || namelen >= MAX_LONG_PATH)
-		return -1;
-
-	memcpy(alt_name, file_name, namelen);
-	alt_name[namelen] = 0;
-	return do_lstat(follow, alt_name, buf);
-}
-
 int (*lstat)(const char *file_name, struct stat *buf) = mingw_lstat;

 static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
@@ -826,7 +995,7 @@ static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
 	buf->st_gid = 0;
 	buf->st_uid = 0;
 	buf->st_nlink = 1;
-	buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
+	buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes, 0);
 	buf->st_size = fdata.nFileSizeLow |
 		(((off_t)fdata.nFileSizeHigh)<<32);
 	buf->st_dev = buf->st_rdev = 0; /* not used by Git */
@@ -836,13 +1005,25 @@ static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
 	return 0;
 }

-int mingw_lstat(const char *file_name, struct stat *buf)
-{
-	return do_stat_internal(0, file_name, buf);
-}
 int mingw_stat(const char *file_name, struct stat *buf)
 {
-	return do_stat_internal(1, file_name, buf);
+	wchar_t wfile_name[MAX_LONG_PATH];
+	HANDLE hnd;
+	int result;
+
+	/* open the file and let Windows resolve the links */
+	if (xutftowcs_long_path(wfile_name, file_name) < 0)
+		return -1;
+	hnd = CreateFileW(wfile_name, 0,
+			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+			OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+	if (hnd == INVALID_HANDLE_VALUE) {
+		errno = err_win_to_posix(GetLastError());
+		return -1;
+	}
+	result = get_file_info_by_handle(hnd, buf);
+	CloseHandle(hnd);
+	return result;
 }

 int mingw_fstat(int fd, struct stat *buf)
@@ -1442,6 +1623,7 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaen
 	HANDLE cons;
 	const char *(*quote_arg)(const char *arg) =
 		is_msys2_sh(*argv) ? quote_arg_msys2 : quote_arg_msvc;
+	const char *strace_env;

 	do_unset_environment_variables();

@@ -1513,6 +1695,31 @@ static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaen
 			free(quoted);
 	}

+	strace_env = getenv("GIT_STRACE_COMMANDS");
+	if (strace_env) {
+		char *p = path_lookup("strace.exe", 1);
+		if (!p)
+			return error("strace not found!");
+		if (xutftowcs_path(wcmd, p) < 0) {
+			free(p);
+			return -1;
+		}
+		free(p);
+		if (!strcmp("1", strace_env) ||
+		    !strcasecmp("yes", strace_env) ||
+		    !strcasecmp("true", strace_env))
+			strbuf_insert(&args, 0, "strace ", 7);
+		else {
+			const char *quoted = quote_arg(strace_env);
+			struct strbuf buf = STRBUF_INIT;
+			strbuf_addf(&buf, "strace -o %s ", quoted);
+			if (quoted != strace_env)
+				free((char *)quoted);
+			strbuf_insert(&args, 0, buf.buf, buf.len);
+			strbuf_release(&buf);
+		}
+	}
+
 	ALLOC_ARRAY(wargs, st_add(st_mult(2, args.len), 1));
 	xutftowcs(wargs, args.buf, 2 * args.len + 1);
 	strbuf_release(&args);
@@ -1966,27 +2173,29 @@ int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
 #undef rename
 int mingw_rename(const char *pold, const char *pnew)
 {
-	DWORD attrs, gle;
+	DWORD attrs = INVALID_FILE_ATTRIBUTES, gle;
 	int tries = 0;
 	wchar_t wpold[MAX_LONG_PATH], wpnew[MAX_LONG_PATH];
 	if (xutftowcs_long_path(wpold, pold) < 0 ||
 	    xutftowcs_long_path(wpnew, pnew) < 0)
 		return -1;

-	/*
-	 * Try native rename() first to get errno right.
-	 * It is based on MoveFile(), which cannot overwrite existing files.
-	 */
-	if (!_wrename(wpold, wpnew))
-		return 0;
-	if (errno != EEXIST)
-		return -1;
 repeat:
-	if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
+	if (MoveFileExW(wpold, wpnew,
+			MOVEFILE_REPLACE_EXISTING | MOVEFILE_COPY_ALLOWED))
 		return 0;
-	/* TODO: translate more errors */
 	gle = GetLastError();
-	if (gle == ERROR_ACCESS_DENIED &&
+
+	/* revert file attributes on failure */
+	if (attrs != INVALID_FILE_ATTRIBUTES)
+		SetFileAttributesW(wpnew, attrs);
+
+	if (!is_file_in_use_error(gle)) {
+		errno = err_win_to_posix(gle);
+		return -1;
+	}
+
+	if (attrs == INVALID_FILE_ATTRIBUTES &&
 	    (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
 		if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
 			DWORD attrsold = GetFileAttributesW(wpold);
@@ -1998,28 +2207,10 @@ repeat:
 			return -1;
 		}
 		if ((attrs & FILE_ATTRIBUTE_READONLY) &&
-		    SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
-			if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
-				return 0;
-			gle = GetLastError();
-			/* revert file attributes on failure */
-			SetFileAttributesW(wpnew, attrs);
-		}
+		    SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY))
+			goto repeat;
 	}
-	if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
-		/*
-		 * We assume that some other process had the source or
-		 * destination file open at the wrong moment and retry.
-		 * In order to give the other process a higher chance to
-		 * complete its operation, we give up our time slice now.
-		 * If we have to retry again, we do sleep a bit.
-		 */
-		Sleep(delay[tries]);
-		tries++;
-		goto repeat;
-	}
-	if (gle == ERROR_ACCESS_DENIED &&
-	       ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
+	if (retry_ask_yes_no(&tries, "Rename from '%s' to '%s' failed. "
 		       "Should I try again?", pold, pnew))
 		goto repeat;

@@ -2291,6 +2482,177 @@ int link(const char *oldpath, const char *newpath)
 	return 0;
 }

+enum symlink_type {
+	SYMLINK_TYPE_UNSPECIFIED = 0,
+	SYMLINK_TYPE_FILE,
+	SYMLINK_TYPE_DIRECTORY,
+};
+
+static enum symlink_type check_symlink_attr(const char *link)
+{
+	static struct attr_check *check;
+	const char *value;
+
+	if (!check)
+		check = attr_check_initl("symlink", NULL);
+
+	git_check_attr(the_repository->index, link, check);
+
+	value = check->items[0].value;
+	if (value == NULL)
+		;
+	else if (!strcmp(value, "file"))
+		return SYMLINK_TYPE_FILE;
+	else if (!strcmp(value, "dir"))
+		return SYMLINK_TYPE_DIRECTORY;
+
+	return SYMLINK_TYPE_UNSPECIFIED;
+}
+
+int symlink(const char *target, const char *link)
+{
+	wchar_t wtarget[MAX_LONG_PATH], wlink[MAX_LONG_PATH];
+	int len;
+
+	/* fail if symlinks are disabled or API is not supported (WinXP) */
+	if (!has_symlinks) {
+		errno = ENOSYS;
+		return -1;
+	}
+
+	if ((len = xutftowcs_long_path(wtarget, target)) < 0
+			|| xutftowcs_long_path(wlink, link) < 0)
+		return -1;
+
+	/* convert target dir separators to backslashes */
+	while (len--)
+		if (wtarget[len] == '/')
+			wtarget[len] = '\\';
+
+	switch (check_symlink_attr(link)) {
+	case SYMLINK_TYPE_UNSPECIFIED:
+		/* Create a phantom symlink: it is initially created as a file
+		 * symlink, but may change to a directory symlink later if/when
+		 * the target exists. */
+		return create_phantom_symlink(wtarget, wlink);
+	case SYMLINK_TYPE_FILE:
+		if (!CreateSymbolicLinkW(wlink, wtarget, symlink_file_flags))
+			break;
+		return 0;
+	case SYMLINK_TYPE_DIRECTORY:
+		if (!CreateSymbolicLinkW(wlink, wtarget,
+					 symlink_directory_flags))
+			break;
+		/* There may be dangling phantom symlinks that point at this
+		 * one, which should now morph into directory symlinks. */
+		process_phantom_symlinks();
+		return 0;
+	default:
+		BUG("unhandled symlink type");
+	}
+
+	/* CreateSymbolicLinkW failed. */
+	errno = err_win_to_posix(GetLastError());
+	return -1;
+}
+
+#ifndef _WINNT_H
+/*
+ * The REPARSE_DATA_BUFFER structure is defined in the Windows DDK (in
+ * ntifs.h) and in MSYS1's winnt.h (which defines _WINNT_H). So define
+ * it ourselves if we are on MSYS2 (whose winnt.h defines _WINNT_).
+ */
+typedef struct _REPARSE_DATA_BUFFER {
+	DWORD  ReparseTag;
+	WORD   ReparseDataLength;
+	WORD   Reserved;
+#ifndef _MSC_VER
+	_ANONYMOUS_UNION
+#endif
+	union {
+		struct {
+			WORD   SubstituteNameOffset;
+			WORD   SubstituteNameLength;
+			WORD   PrintNameOffset;
+			WORD   PrintNameLength;
+			ULONG  Flags;
+			WCHAR PathBuffer[1];
+		} SymbolicLinkReparseBuffer;
+		struct {
+			WORD   SubstituteNameOffset;
+			WORD   SubstituteNameLength;
+			WORD   PrintNameOffset;
+			WORD   PrintNameLength;
+			WCHAR PathBuffer[1];
+		} MountPointReparseBuffer;
+		struct {
+			BYTE   DataBuffer[1];
+		} GenericReparseBuffer;
+	} DUMMYUNIONNAME;
+} REPARSE_DATA_BUFFER, *PREPARSE_DATA_BUFFER;
+#endif
+
+int readlink(const char *path, char *buf, size_t bufsiz)
+{
+	HANDLE handle;
+	WCHAR wpath[MAX_LONG_PATH], *wbuf;
+	REPARSE_DATA_BUFFER *b = alloca(MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
+	DWORD dummy;
+	char tmpbuf[MAX_LONG_PATH];
+	int len;
+
+	if (xutftowcs_long_path(wpath, path) < 0)
+		return -1;
+
+	/* read reparse point data */
+	handle = CreateFileW(wpath, 0,
+			FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+			OPEN_EXISTING,
+			FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT, NULL);
+	if (handle == INVALID_HANDLE_VALUE) {
+		errno = err_win_to_posix(GetLastError());
+		return -1;
+	}
+	if (!DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0, b,
+			MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dummy, NULL)) {
+		errno = err_win_to_posix(GetLastError());
+		CloseHandle(handle);
+		return -1;
+	}
+	CloseHandle(handle);
+
+	/* get target path for symlinks or mount points (aka 'junctions') */
+	switch (b->ReparseTag) {
+	case IO_REPARSE_TAG_SYMLINK:
+		wbuf = (WCHAR*) (((char*) b->SymbolicLinkReparseBuffer.PathBuffer)
+				+ b->SymbolicLinkReparseBuffer.SubstituteNameOffset);
+		*(WCHAR*) (((char*) wbuf)
+				+ b->SymbolicLinkReparseBuffer.SubstituteNameLength) = 0;
+		break;
+	case IO_REPARSE_TAG_MOUNT_POINT:
+		wbuf = (WCHAR*) (((char*) b->MountPointReparseBuffer.PathBuffer)
+				+ b->MountPointReparseBuffer.SubstituteNameOffset);
+		*(WCHAR*) (((char*) wbuf)
+				+ b->MountPointReparseBuffer.SubstituteNameLength) = 0;
+		break;
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+
+	/*
+	 * Adapt to strange readlink() API: Copy up to bufsiz *bytes*, potentially
+	 * cutting off a UTF-8 sequence. Insufficient bufsize is *not* a failure
+	 * condition. There is no conversion function that produces invalid UTF-8,
+	 * so convert to a (hopefully large enough) temporary buffer, then memcpy
+	 * the requested number of bytes (including '\0' for robustness).
+	 */
+	if ((len = xwcstoutf(tmpbuf, normalize_ntpath(wbuf), MAX_LONG_PATH)) < 0)
+		return -1;
+	memcpy(buf, tmpbuf, min(bufsiz, len + 1));
+	return min(bufsiz, len);
+}
+
 pid_t waitpid(pid_t pid, int *status, int options)
 {
 	HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
@@ -2455,6 +2817,42 @@ static void setup_windows_environment(void)
 	/* simulate TERM to enable auto-color (see color.c) */
 	if (!getenv("TERM"))
 		setenv("TERM", "cygwin", 1);
+
+	/* calculate HOME if not set */
+	if (!getenv("HOME")) {
+		/*
+		 * try $HOMEDRIVE$HOMEPATH - the home share may be a network
+		 * location, thus also check if the path exists (i.e. is not
+		 * disconnected)
+		 */
+		if ((tmp = getenv("HOMEDRIVE"))) {
+			struct strbuf buf = STRBUF_INIT;
+			strbuf_addstr(&buf, tmp);
+			if ((tmp = getenv("HOMEPATH"))) {
+				strbuf_addstr(&buf, tmp);
+				if (is_directory(buf.buf))
+					setenv("HOME", buf.buf, 1);
+				else
+					tmp = NULL; /* use $USERPROFILE */
+			}
+			strbuf_release(&buf);
+		}
+		/* use $USERPROFILE if the home share is not available */
+		if (!tmp && (tmp = getenv("USERPROFILE")))
+			setenv("HOME", tmp, 1);
+	}
+
+	/*
+	 * Change 'core.symlinks' default to false, unless native symlinks are
+	 * enabled in MSys2 (via 'MSYS=winsymlinks:nativestrict'). Thus we can
+	 * run the test suite (which doesn't obey config files) with or without
+	 * symlink support.
+	 */
+	if (!(tmp = getenv("MSYS")) || !strstr(tmp, "winsymlinks:nativestrict"))
+		has_symlinks = 0;
+
+	if (!getenv("LC_ALL") && !getenv("LC_CTYPE") && !getenv("LANG"))
+		setenv("LC_CTYPE", "C", 1);
 }

 int handle_long_path(wchar_t *path, int len, int max_path, int expand)
@@ -2603,6 +3001,24 @@ static void maybe_redirect_std_handles(void)
 				  GENERIC_WRITE, FILE_FLAG_NO_BUFFERING);
 }

+static void adjust_symlink_flags(void)
+{
+	/*
+	 * Starting with Windows 10 Build 14972, symbolic links can be created
+	 * using CreateSymbolicLink() without elevation by passing the flag
+	 * SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE (0x02) as last
+	 * parameter, provided the Developer Mode has been enabled. Some
+	 * earlier Windows versions complain about this flag with an
+	 * ERROR_INVALID_PARAMETER, hence we have to test the build number
+	 * specifically.
+	 */
+	if (GetVersion() >= 14972 << 16) {
+		symlink_file_flags |= 2;
+		symlink_directory_flags |= 2;
+	}
+
+}
+
 #ifdef _MSC_VER
 #ifdef _DEBUG
 #include <crtdbg.h>
@@ -2635,6 +3051,7 @@ int wmain(int argc, const wchar_t **wargv)
 #endif

 	maybe_redirect_std_handles();
+	adjust_symlink_flags();

 	/* determine size of argv and environ conversion buffer */
 	maxlen = wcslen(wargv[0]);
@@ -2664,6 +3081,7 @@ int wmain(int argc, const wchar_t **wargv)

 	/* initialize critical section for waitpid pinfo_t list */
 	InitializeCriticalSection(&pinfo_cs);
+	InitializeCriticalSection(&phantom_symlinks_cs);

 	/* set up default file mode and file modes for stdin/out/err */
 	_fmode = _O_BINARY;
--- a/compat/mingw.h
+++ b/compat/mingw.h
@@ -142,10 +142,6 @@ struct utsname {
 * trivial stubs
 */

-static inline int readlink(const char *path, char *buf, size_t bufsiz)
-{ errno = ENOSYS; return -1; }
-static inline int symlink(const char *oldpath, const char *newpath)
-{ errno = ENOSYS; return -1; }
 static inline int fchmod(int fildes, mode_t mode)
 { errno = ENOSYS; return -1; }
 #ifndef __MINGW64_VERSION_MAJOR
@@ -237,6 +233,8 @@ int setitimer(int type, struct itimerval *in, struct itimerval *out);
 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 int link(const char *oldpath, const char *newpath);
 int uname(struct utsname *buf);
+int symlink(const char *target, const char *link);
+int readlink(const char *path, char *buf, size_t bufsiz);

 /*
 * replacements of existing functions
--- a/compat/terminal.c
+++ b/compat/terminal.c
@@ -1,7 +1,12 @@
+#ifndef NO_INTTYPES_H
+#include <inttypes.h>
+#endif
 #include "git-compat-util.h"
+#include "run-command.h"
 #include "compat/terminal.h"
 #include "sigchain.h"
 #include "strbuf.h"
+#include "cache.h"

 #if defined(HAVE_DEV_TTY) || defined(GIT_WINDOWS_NATIVE)

@@ -91,6 +96,55 @@ static int disable_echo(void)
 	return 0;
 }

+static char *shell_prompt(const char *prompt, int echo)
+{
+	const char *read_input[] = {
+		/* Note: call 'bash' explicitly, as 'read -s' is bash-specific */
+		"bash", "-c", echo ?
+		"cat >/dev/tty && read -r line </dev/tty && echo \"$line\"" :
+		"cat >/dev/tty && read -r -s line </dev/tty && echo \"$line\" && echo >/dev/tty",
+		NULL
+	};
+	struct child_process child = CHILD_PROCESS_INIT;
+	static struct strbuf buffer = STRBUF_INIT;
+	int prompt_len = strlen(prompt), len = -1, code;
+
+	child.argv = read_input;
+	child.in = -1;
+	child.out = -1;
+	child.silent_exec_failure = 1;
+
+	if (start_command(&child))
+		return NULL;
+
+	if (write_in_full(child.in, prompt, prompt_len) != prompt_len) {
+		error("could not write to prompt script");
+		close(child.in);
+		goto ret;
+	}
+	close(child.in);
+
+	strbuf_reset(&buffer);
+	len = strbuf_read(&buffer, child.out, 1024);
+	if (len < 0) {
+		error("could not read from prompt script");
+		goto ret;
+	}
+
+	strbuf_strip_suffix(&buffer, "\n");
+	strbuf_strip_suffix(&buffer, "\r");
+
+ret:
+	close(child.out);
+	code = finish_command(&child);
+	if (code) {
+		error("failed to execute prompt script (exit code %d)", code);
+		return NULL;
+	}
+
+	return len < 0 ? NULL : buffer.buf;
+}
+
 #endif

 #ifndef FORCE_TEXT
@@ -103,6 +157,15 @@ char *git_terminal_prompt(const char *prompt, int echo)
 	int r;
 	FILE *input_fh, *output_fh;

+#ifdef GIT_WINDOWS_NATIVE
+
+	/* try shell_prompt first, fall back to CONIN/OUT if bash is missing */
+	char *result = shell_prompt(prompt, echo);
+	if (result || errno != ENOENT)
+		return result;
+
+#endif
+
 	input_fh = fopen(INPUT_PATH, "r" FORCE_TEXT);
 	if (!input_fh)
 		return NULL;
--- a/compat/win32.h
+++ b/compat/win32.h
@@ -6,10 +6,12 @@
 #include <windows.h>
 #endif

-static inline int file_attr_to_st_mode (DWORD attr)
+static inline int file_attr_to_st_mode (DWORD attr, DWORD tag)
 {
 	int fMode = S_IREAD;
-	if (attr & FILE_ATTRIBUTE_DIRECTORY)
+	if ((attr & FILE_ATTRIBUTE_REPARSE_POINT) && tag == IO_REPARSE_TAG_SYMLINK)
+		fMode |= S_IFLNK;
+	else if (attr & FILE_ATTRIBUTE_DIRECTORY)
 		fMode |= S_IFDIR;
 	else
 		fMode |= S_IFREG;
--- a/compat/win32/dirent.c
+++ b/compat/win32/dirent.c
@@ -16,7 +16,10 @@ static inline void finddata2dirent(struct dirent *ent, WIN32_FIND_DATAW *fdata)
 	xwcstoutf(ent->d_name, fdata->cFileName, MAX_PATH * 3);

 	/* Set file type, based on WIN32_FIND_DATA */
-	if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+	if ((fdata->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT)
+			&& fdata->dwReserved0 == IO_REPARSE_TAG_SYMLINK)
+		ent->d_type = DT_LNK;
+	else if (fdata->dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
 		ent->d_type = DT_DIR;
 	else
 		ent->d_type = DT_REG;
--- a/compat/win32/fscache.c
+++ b/compat/win32/fscache.c
@@ -149,9 +149,10 @@ static struct fsentry *fseentry_create_entry(struct fsentry *list,

 	fse = fsentry_alloc(list, buf, len);

-	fse->st_mode = file_attr_to_st_mode(fdata->dwFileAttributes);
-	fse->st_size = (((off64_t) (fdata->nFileSizeHigh)) << 32)
-			| fdata->nFileSizeLow;
+	fse->st_mode = file_attr_to_st_mode(fdata->dwFileAttributes,
+			fdata->dwReserved0);
+	fse->st_size = S_ISLNK(fse->st_mode) ? MAX_LONG_PATH :
+			fdata->nFileSizeLow | (((off_t) fdata->nFileSizeHigh) << 32);
 	filetime_to_timespec(&(fdata->ftLastAccessTime), &(fse->st_atim));
 	filetime_to_timespec(&(fdata->ftLastWriteTime), &(fse->st_mtim));
 	filetime_to_timespec(&(fdata->ftCreationTime), &(fse->st_ctim));
@@ -442,7 +443,8 @@ static struct dirent *fscache_readdir(DIR *base_dir)
 	if (!next)
 		return NULL;
 	dir->pfsentry = next;
-	dir->dirent.d_type = S_ISDIR(next->st_mode) ? DT_DIR : DT_REG;
+	dir->dirent.d_type = S_ISREG(next->st_mode) ? DT_REG :
+			S_ISDIR(next->st_mode) ? DT_DIR : DT_LNK;
 	dir->dirent.d_name = (char*) next->name;
 	return &(dir->dirent);
 }
--- a/compat/win32/git.manifest
+++ b/compat/win32/git.manifest
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+	<assemblyIdentity type="win32" name="Git" version="0.0.0.1" />
+	<trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
+		<security>
+			<requestedPrivileges>
+				<requestedExecutionLevel level="asInvoker" uiAccess="false" />
+			</requestedPrivileges>
+		</security>
+	</trustInfo>
+	<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+		<application>
+			<!-- Windows Vista -->
+			<supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
+			<!-- Windows 7 -->
+			<supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/>
+			<!-- Windows 8 -->
+			<supportedOS Id="{4a2f28e3-53b9-4441-ba9c-d69d4a4a6e38}"/>
+			<!-- Windows 8.1 -->
+			<supportedOS Id="{1f676c76-80e1-4239-95bb-83d0f6d0da78}"/>
+			<!-- Windows 10 -->
+			<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+		</application>
+	</compatibility>
+</assembly>
--- a/compat/winansi.c
+++ b/compat/winansi.c
@@ -7,6 +7,7 @@
 #include <wingdi.h>
 #include <winreg.h>
 #include "win32.h"
+#include "win32/lazyload.h"

 static int fd_is_interactive[3] = { 0, 0, 0 };
 #define FD_CONSOLE 0x1
@@ -41,26 +42,21 @@ typedef struct _CONSOLE_FONT_INFOEX {
 #endif
 #endif

-typedef BOOL (WINAPI *PGETCURRENTCONSOLEFONTEX)(HANDLE, BOOL,
-		PCONSOLE_FONT_INFOEX);
-
 static void warn_if_raster_font(void)
 {
 	DWORD fontFamily = 0;
-	PGETCURRENTCONSOLEFONTEX pGetCurrentConsoleFontEx;
+	DECLARE_PROC_ADDR(kernel32.dll, BOOL, GetCurrentConsoleFontEx,
+			HANDLE, BOOL, PCONSOLE_FONT_INFOEX);

 	/* don't bother if output was ascii only */
 	if (!non_ascii_used)
 		return;

 	/* GetCurrentConsoleFontEx is available since Vista */
-	pGetCurrentConsoleFontEx = (PGETCURRENTCONSOLEFONTEX) GetProcAddress(
-			GetModuleHandle("kernel32.dll"),
-			"GetCurrentConsoleFontEx");
-	if (pGetCurrentConsoleFontEx) {
+	if (INIT_PROC_ADDR(GetCurrentConsoleFontEx)) {
 		CONSOLE_FONT_INFOEX cfi;
 		cfi.cbSize = sizeof(cfi);
-		if (pGetCurrentConsoleFontEx(console, 0, &cfi))
+		if (GetCurrentConsoleFontEx(console, 0, &cfi))
 			fontFamily = cfi.FontFamily;
 	} else {
 		/* pre-Vista: check default console font in registry */
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -586,7 +586,6 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NO_STRTOUMAX = YesPlease
 	NO_MKDTEMP = YesPlease
 	NO_SVN_TESTS = YesPlease
-	NO_PERL_MAKEMAKER = YesPlease
 	RUNTIME_PREFIX = YesPlease
 	HAVE_WPGMPTR = YesWeDo
 	NO_ST_BLOCKS_IN_STRUCT_STAT = YesPlease
@@ -615,7 +614,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	NATIVE_CRLF = YesPlease
 	X = .exe
 ifneq (,$(wildcard ../THIS_IS_MSYSGIT))
-	htmldir = doc/git/html/
+	htmldir = share/doc/git/$(firstword $(subst -, ,$(GIT_VERSION)))/html
 	prefix =
 	INSTALL = /bin/install
 	EXTLIBS += /mingw/lib/libz.a
@@ -646,7 +645,8 @@ else
 			BASIC_LDFLAGS += -Wl,--large-address-aware
 		endif
 		CC = gcc
-		COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -DDETECT_MSYS_TTY
+		COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO=0 -DDETECT_MSYS_TTY \
+			-fstack-protector-strong
 		EXTLIBS += -lntdll
 		INSTALL = /bin/install
 		NO_R_TO_GCC_LINKER = YesPlease
@@ -658,6 +658,7 @@ else
 		NO_LIBPCRE1_JIT = UnfortunatelyYes
 		NO_CURL =
 		USE_NED_ALLOCATOR = YesPlease
+		NO_PYTHON =
 	else
 		COMPAT_CFLAGS += -D__USE_MINGW_ANSI_STDIO
 		NO_CURL = YesPlease
--- a/diff.c
+++ b/diff.c
@@ -4207,6 +4207,10 @@ static void run_external_diff(const char *pgm,
 	argv_array_pushf(&env, "GIT_DIFF_PATH_COUNTER=%d", ++o->diff_path_counter);
 	argv_array_pushf(&env, "GIT_DIFF_PATH_TOTAL=%d", q->nr);

+	if (one && one->should_munmap)
+		diff_free_filespec_data(one);
+	if (two && two->should_munmap)
+		diff_free_filespec_data(two);
 	if (run_command_v_opt_cd_env(argv.argv, RUN_USING_SHELL, NULL, env.argv))
 		die(_("external diff died, stopping at %s"), name);

--- a/gettext.c
+++ b/gettext.c
@@ -12,7 +12,9 @@
 #ifndef NO_GETTEXT
 #	include <locale.h>
 #	include <libintl.h>
-#	ifdef HAVE_LIBCHARSET_H
+#	ifdef GIT_WINDOWS_NATIVE
+#		define locale_charset() "UTF-8"
+#	elif defined HAVE_LIBCHARSET_H
 #		include <libcharset.h>
 #	else
 #		include <langinfo.h>
--- a/git.rc
+++ b/git.rc
@@ -20,3 +20,5 @@ BEGIN
    VALUE "Translation", 0x409, 1200
  END
 END
+
+1 RT_MANIFEST "compat/win32/git.manifest"
--- a/gpg-interface.c
+++ b/gpg-interface.c
@@ -293,11 +293,9 @@ int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *sig
 	struct child_process gpg = CHILD_PROCESS_INIT;
 	int ret;
 	size_t i, j, bottom;
-	struct strbuf gpg_status = STRBUF_INIT;

 	argv_array_pushl(&gpg.args,
 			 use_format->program,
-			 "--status-fd=2",
 			 "-bsau", signing_key,
 			 NULL);

@@ -309,12 +307,10 @@ int sign_buffer(struct strbuf *buffer, struct strbuf *signature, const char *sig
 	 */
 	sigchain_push(SIGPIPE, SIG_IGN);
 	ret = pipe_command(&gpg, buffer->buf, buffer->len,
-			   signature, 1024, &gpg_status, 0);
+			   signature, 1024, NULL, 0);
 	sigchain_pop(SIGPIPE);

-	ret |= !strstr(gpg_status.buf, "\n[GNUPG:] SIG_CREATED ");
-	strbuf_release(&gpg_status);
-	if (ret)
+	if (ret || signature->len == bottom)
 		return error(_("gpg failed to sign the data"));

 	/* Strip CR from the line endings, in case we are on Windows. */
--- a/lockfile.c
+++ b/lockfile.c
@@ -17,14 +17,14 @@ static void trim_last_path_component(struct strbuf *path)
 	int i = path->len;

 	/* back up past trailing slashes, if any */
-	while (i && path->buf[i - 1] == '/')
+	while (i && is_dir_sep(path->buf[i - 1]))
 		i--;

 	/*
 	 * then go backwards until a slash, or the beginning of the
 	 * string
 	 */
-	while (i && path->buf[i - 1] != '/')
+	while (i && !is_dir_sep(path->buf[i - 1]))
 		i--;

 	strbuf_setlen(path, i);
--- a/strbuf.c
+++ b/strbuf.c
@@ -468,8 +468,6 @@ ssize_t strbuf_write(struct strbuf *sb, FILE *f)
 }


-#define STRBUF_MAXLINK (2*PATH_MAX)
-
 int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
 {
 	size_t oldalloc = sb->alloc;
@@ -477,15 +475,15 @@ int strbuf_readlink(struct strbuf *sb, const char *path, size_t hint)
 	if (hint < 32)
 		hint = 32;

-	while (hint < STRBUF_MAXLINK) {
+	for (;;) {
 		ssize_t len;

-		strbuf_grow(sb, hint);
-		len = readlink(path, sb->buf, hint);
+		strbuf_grow(sb, hint + 1);
+		len = readlink(path, sb->buf, hint + 1);
 		if (len < 0) {
 			if (errno != ERANGE)
 				break;
-		} else if (len < hint) {
+		} else if (len <= hint) {
 			strbuf_setlen(sb, len);
 			return 0;
 		}
--- a/t/t0001-init.sh
+++ b/t/t0001-init.sh
@@ -412,7 +412,7 @@ test_expect_success SYMLINKS 're-init to move gitdir symlink' '
 # Tests for the hidden file attribute on windows
 is_hidden () {
 	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
 	return 1
 }

--- a/t/t2040-checkout-symlink-attr.sh
+++ b/t/t2040-checkout-symlink-attr.sh
@@ -0,0 +1,51 @@
+#!/bin/sh
+
+test_description='checkout symlinks with `symlink` attribute on Windows
+
+Ensures that Git for Windows creates symlinks of the right type,
+as specified by the `symlink` attribute in `.gitattributes`.'
+
+# Tell MSYS to create native symlinks. Without this flag test-lib's
+# prerequisite detection for SYMLINKS doesn't detect the right thing.
+MSYS=winsymlinks:nativestrict && export MSYS
+
+. ./test-lib.sh
+
+if ! test_have_prereq MINGW,SYMLINKS
+then
+	skip_all='skipping $0: MinGW-only test, which requires symlink support.'
+	test_done
+fi
+
+# Adds a symlink to the index without clobbering the work tree.
+cache_symlink () {
+	sha=$(printf '%s' "$1" | git hash-object --stdin -w) &&
+	git update-index --add --cacheinfo 120000,$sha,"$2"
+}
+
+# MSYS2 is very forgiving, it will resolve symlinks even if the
+# symlink type isn't correct. To make this test meaningful, try
+# them with a native, non-MSYS executable.
+cat_native () {
+	filename=$(cygpath -w "$1") &&
+	cmd.exe /c "type \"$filename\""
+}
+
+test_expect_success 'checkout symlinks with attr' '
+	cache_symlink file1 file-link &&
+	cache_symlink dir dir-link &&
+
+	printf "file-link symlink=file\ndir-link symlink=dir\n" >.gitattributes &&
+	git add .gitattributes &&
+
+	git checkout . &&
+
+	mkdir dir &&
+	echo "contents1" >file1 &&
+	echo "contents2" >dir/file2 &&
+
+	test "$(cat_native file-link)" = "contents1" &&
+	test "$(cat_native dir-link/file2)" = "contents2"
+'
+
+test_done
--- a/t/t5611-clone-config.sh
+++ b/t/t5611-clone-config.sh
@@ -95,7 +95,7 @@ test_expect_success 'clone -c remote.<remote>.fetch=<refspec> --origin=<name>' '
 # Tests for the hidden file attribute on windows
 is_hidden () {
 	# Use the output of `attrib`, ignore the absolute path
-	case "$(attrib "$1")" in *H*?:*) return 0;; esac
+	case "$("$SYSTEMROOT"/system32/attrib "$1")" in *H*?:*) return 0;; esac
 	return 1
 }

--- a/t/t7004-tag.sh
+++ b/t/t7004-tag.sh
@@ -1345,12 +1345,6 @@ test_expect_success GPG \
 	'test_config user.signingkey BobTheMouse &&
 	test_must_fail git tag -s -m tail tag-gpg-failure'

-# try to produce invalid signature
-test_expect_success GPG \
-	'git tag -s fails if gpg is misconfigured (bad signature format)' \
-	'test_config gpg.program echo &&
-	 test_must_fail git tag -s -m tail tag-gpg-failure'
-
 # try to sign with bad user.signingkey
 test_expect_success GPGSM \
 	'git tag -s fails if gpgsm is misconfigured (bad key)' \
@@ -1358,13 +1352,6 @@ test_expect_success GPGSM \
 	 test_config gpg.format x509 &&
 	 test_must_fail git tag -s -m tail tag-gpg-failure'

-# try to produce invalid signature
-test_expect_success GPGSM \
-	'git tag -s fails if gpgsm is misconfigured (bad signature format)' \
-	'test_config gpg.x509.program echo &&
-	 test_config gpg.format x509 &&
-	 test_must_fail git tag -s -m tail tag-gpg-failure'
-
 # try to verify without gpg:

 rm -rf gpghome
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -1180,8 +1180,8 @@ test_expect_success $PREREQ 'in-reply-to but no threading' '
 		--to=nobody@example.com \
 		--in-reply-to="<in-reply-id@example.com>" \
 		--no-thread \
-		$patches |
-	grep "In-Reply-To: <in-reply-id@example.com>"
+		$patches >out &&
+	grep "In-Reply-To: <in-reply-id@example.com>" out
 '

 test_expect_success $PREREQ 'no in-reply-to and no threading' '
--- a/t/t9020-remote-svn.sh
+++ b/t/t9020-remote-svn.sh
@@ -12,6 +12,12 @@ then
 	test_done
 fi

+if test_have_prereq MINGW
+then
+	skip_all='skipping remote-svn tests for lack of POSIX'
+	test_done
+fi
+
 # Override svnrdump with our simulator
 PATH="$HOME:$PATH"
 export PATH PYTHON_PATH GIT_BUILD_DIR
--- a/t/t9116-git-svn-log.sh
+++ b/t/t9116-git-svn-log.sh
@@ -43,14 +43,18 @@ test_expect_success 'setup repository and import' '

 test_expect_success 'run log' "
 	git reset --hard origin/a &&
-	git svn log -r2 origin/trunk | grep ^r2 &&
-	git svn log -r4 origin/trunk | grep ^r4 &&
-	git svn log -r3 | grep ^r3
+	git svn log -r2 origin/trunk >out &&
+	grep ^r2 out &&
+	git svn log -r4 origin/trunk >out &&
+	grep ^r4 out &&
+	git svn log -r3 >out &&
+	grep ^r3 out
 	"

 test_expect_success 'run log against a from trunk' "
 	git reset --hard origin/trunk &&
-	git svn log -r3 origin/a | grep ^r3
+	git svn log -r3 origin/a >out &&
+	grep ^r3 out
 	"

 printf 'r1 \nr2 \nr4 \n' > expected-range-r1-r2-r4