Merge branch 'maint'

* maint:
  Document accumulated fixes since 1.7.9.2
  Git 1.7.8.5
  grep -P: Fix matching ^ and $
  am: don't infloop for an empty input file
  rebase -m: only call "notes copy" when rewritten exists and is non-empty
  git-p4: remove bash-ism in t9800
  git-p4: remove bash-ism in t9809
  git-p4: fix submit regression with clientSpec and subdir clone
  git-p4: set useClientSpec variable on initial clone
  Makefile: add thread-utils.h to LIB_H

Conflicts:
	RelNotes
	t/t9809-git-p4-client-view.sh

12 files changed, 291 insertions, 72 deletions

diff --git a/Documentation/RelNotes/1.7.10.txt b/Documentation/RelNotes/1.7.10.txt
index 0add762b0a..364e16d0d5 100644
--- a/Documentation/RelNotes/1.7.10.txt
+++ b/Documentation/RelNotes/1.7.10.txt
@@ -87,15 +87,6 @@ Unless otherwise noted, all the fixes since v1.7.9 in the maintenance
 releases are contained in this release (see release notes to them for
 details).
 
- * The config.mak.autogen generated by optional autoconf support tried
-   to link the binary with -lintl even when libintl.h is missing from
-   the system.
-   (merge a8356d4 js/configure-libintl later to maint).
-
- * "git add --refresh <pathspec>" used to warn about unmerged paths
-   outside the given pathspec.
-   (merge 3d1f148 jc/add-refresh-unmerged later to maint).
-
  * "gitweb" used to drop warnings in the log file when "heads" view is
    accessed in a repository whose HEAD does not point at a valid
    branch.
diff --git a/Documentation/RelNotes/1.7.8.5.txt b/Documentation/RelNotes/1.7.8.5.txt
new file mode 100644
index 0000000000..011fd2a428
--- /dev/null
+++ b/Documentation/RelNotes/1.7.8.5.txt
@@ -0,0 +1,19 @@
+Git v1.7.8.5 Release Notes
+==========================
+
+Fixes since v1.7.8.4
+--------------------
+
+ * Dependency on our thread-utils.h header file was missing for
+   objects that depend on it in the Makefile.
+
+ * "git am" when fed an empty file did not correctly finish reading it
+   when it attempts to guess the input format.
+
+ * "git grep -P" (when PCRE is enabled in the build) did not match the
+   beginning and the end of the line correctly with ^ and $.
+
+ * "git rebase -m" tried to run "git notes copy" needlessly when
+   nothing was rewritten.
+
+Also contains minor fixes and documentation updates.
diff --git a/Documentation/RelNotes/1.7.9.3.txt b/Documentation/RelNotes/1.7.9.3.txt
new file mode 100644
index 0000000000..1d03fd10c0
--- /dev/null
+++ b/Documentation/RelNotes/1.7.9.3.txt
@@ -0,0 +1,17 @@
+Git v1.7.9.3 Release Notes
+==========================
+
+Fixes since v1.7.9.2
+--------------------
+
+ * "git p4" (in contrib/) submit the changes to a wrong place when the
+   "--use-client-spec" option is set.
+
+ * The config.mak.autogen generated by optional autoconf support tried
+   to link the binary with -lintl even when libintl.h is missing from
+   the system.
+
+ * "git add --refresh <pathspec>" used to warn about unmerged paths
+   outside the given pathspec.
+
+Also contains minor fixes and documentation updates.
diff --git a/Documentation/git-p4.txt b/Documentation/git-p4.txt
index 3fecefaea2..b7c7929716 100644
--- a/Documentation/git-p4.txt
+++ b/Documentation/git-p4.txt
@@ -303,9 +303,13 @@ CLIENT SPEC
 -----------
 The p4 client specification is maintained with the 'p4 client' command
 and contains among other fields, a View that specifies how the depot
-is mapped into the client repository.  Git-p4 can consult the client
-spec when given the '--use-client-spec' option or useClientSpec
-variable.
+is mapped into the client repository.  The 'clone' and 'sync' commands
+can consult the client spec when given the '--use-client-spec' option or
+when the useClientSpec variable is true.  After 'git p4 clone', the
+useClientSpec variable is automatically set in the repository
+configuration file.  This allows future 'git p4 submit' commands to
+work properly; the submit command looks only at the variable and does
+not have a command-line option.
 
 The full syntax for a p4 view is documented in 'p4 help views'.  Git-p4
 knows only a subset of the view syntax.  It understands multi-line
diff --git a/Makefile b/Makefile
index 1fb1705317..cf2c40b44f 100644
--- a/Makefile
+++ b/Makefile
@@ -620,6 +620,7 @@ LIB_H += streaming.h
 LIB_H += string-list.h
 LIB_H += submodule.h
 LIB_H += tag.h
+LIB_H += thread-utils.h
 LIB_H += transport.h
 LIB_H += tree.h
 LIB_H += tree-walk.h
diff --git a/contrib/fast-import/git-p4 b/contrib/fast-import/git-p4
index 053955349a..c5362c4c11 100755
--- a/contrib/fast-import/git-p4
+++ b/contrib/fast-import/git-p4
@@ -596,6 +596,46 @@ def p4PathStartsWith(path, prefix):
         return path.lower().startswith(prefix.lower())
     return path.startswith(prefix)
 
+def getClientSpec():
+    """Look at the p4 client spec, create a View() object that contains
+       all the mappings, and return it."""
+
+    specList = p4CmdList("client -o")
+    if len(specList) != 1:
+        die('Output from "client -o" is %d lines, expecting 1' %
+            len(specList))
+
+    # dictionary of all client parameters
+    entry = specList[0]
+
+    # just the keys that start with "View"
+    view_keys = [ k for k in entry.keys() if k.startswith("View") ]
+
+    # hold this new View
+    view = View()
+
+    # append the lines, in order, to the view
+    for view_num in range(len(view_keys)):
+        k = "View%d" % view_num
+        if k not in view_keys:
+            die("Expected view key %s missing" % k)
+        view.append(entry[k])
+
+    return view
+
+def getClientRoot():
+    """Grab the client directory."""
+
+    output = p4CmdList("client -o")
+    if len(output) != 1:
+        die('Output from "client -o" is %d lines, expecting 1' % len(output))
+
+    entry = output[0]
+    if "Root" not in entry:
+        die('Client has no "Root"')
+
+    return entry["Root"]
+
 class Command:
     def __init__(self):
         self.usage = "usage: %prog [options]"
@@ -1220,11 +1260,20 @@ class P4Submit(Command, P4UserMap):
             print "Internal error: cannot locate perforce depot path from existing branches"
             sys.exit(128)
 
-        self.clientPath = p4Where(self.depotPath)
+        self.useClientSpec = False
+        if gitConfig("git-p4.useclientspec", "--bool") == "true":
+            self.useClientSpec = True
+        if self.useClientSpec:
+            self.clientSpecDirs = getClientSpec()
 
-        if len(self.clientPath) == 0:
-            print "Error: Cannot locate perforce checkout of %s in client view" % self.depotPath
-            sys.exit(128)
+        if self.useClientSpec:
+            # all files are relative to the client spec
+            self.clientPath = getClientRoot()
+        else:
+            self.clientPath = p4Where(self.depotPath)
+
+        if self.clientPath == "":
+            die("Error: Cannot locate perforce checkout of %s in client view" % self.depotPath)
 
         print "Perforce checkout for depot path %s located at %s" % (self.depotPath, self.clientPath)
         self.oldWorkingDirectory = os.getcwd()
@@ -1530,6 +1579,7 @@ class P4Sync(Command, P4UserMap):
         self.p4BranchesInGit = []
         self.cloneExclude = []
         self.useClientSpec = False
+        self.useClientSpec_from_options = False
         self.clientSpecDirs = None
         self.tempBranches = []
         self.tempBranchLocation = "git-p4-tmp"
@@ -2223,33 +2273,6 @@ class P4Sync(Command, P4UserMap):
             print self.gitError.read()
 
 
-    def getClientSpec(self):
-        specList = p4CmdList("client -o")
-        if len(specList) != 1:
-            die('Output from "client -o" is %d lines, expecting 1' %
-                len(specList))
-
-        # dictionary of all client parameters
-        entry = specList[0]
-
-        # just the keys that start with "View"
-        view_keys = [ k for k in entry.keys() if k.startswith("View") ]
-
-        # hold this new View
-        view = View()
-
-        # append the lines, in order, to the view
-        for view_num in range(len(view_keys)):
-            k = "View%d" % view_num
-            if k not in view_keys:
-                die("Expected view key %s missing" % k)
-            view.append(entry[k])
-
-        self.clientSpecDirs = view
-        if self.verbose:
-            for i, m in enumerate(self.clientSpecDirs.mappings):
-                    print "clientSpecDirs %d: %s" % (i, str(m))
-
     def run(self, args):
         self.depotPaths = []
         self.changeRange = ""
@@ -2282,11 +2305,15 @@ class P4Sync(Command, P4UserMap):
             if not gitBranchExists(self.refPrefix + "HEAD") and self.importIntoRemotes and gitBranchExists(self.branch):
                 system("git symbolic-ref %sHEAD %s" % (self.refPrefix, self.branch))
 
-        if not self.useClientSpec:
+        # accept either the command-line option, or the configuration variable
+        if self.useClientSpec:
+            # will use this after clone to set the variable
+            self.useClientSpec_from_options = True
+        else:
             if gitConfig("git-p4.useclientspec", "--bool") == "true":
                 self.useClientSpec = True
         if self.useClientSpec:
-            self.getClientSpec()
+            self.clientSpecDirs = getClientSpec()
 
         # TODO: should always look at previous commits,
         # merge with previous imports, if possible.
@@ -2607,6 +2634,10 @@ class P4Clone(P4Sync):
             else:
                 print "Could not detect main branch. No checkout/master branch created."
 
+        # auto-set this variable if invoked with --use-client-spec
+        if self.useClientSpec_from_options:
+            system("git config --bool git-p4.useclientspec true")
+
         return True
 
 class P4Branches(Command):
diff --git a/git-am.sh b/git-am.sh
index 64d8e2a64d..906f91f188 100755
--- a/git-am.sh
+++ b/git-am.sh
@@ -202,7 +202,7 @@ check_patch_format () {
 		l1=
 		while test -z "$l1"
 		do
-			read l1
+			read l1 || break
 		done
 		read l2
 		read l3
diff --git a/git-rebase--merge.sh b/git-rebase--merge.sh
index 26afc75cc7..dc599077f0 100644
--- a/git-rebase--merge.sh
+++ b/git-rebase--merge.sh
@@ -90,10 +90,13 @@ call_merge () {
 
 finish_rb_merge () {
 	move_to_original_branch
-	git notes copy --for-rewrite=rebase < "$state_dir"/rewritten
-	if test -x "$GIT_DIR"/hooks/post-rewrite &&
-		test -s "$state_dir"/rewritten; then
-		"$GIT_DIR"/hooks/post-rewrite rebase < "$state_dir"/rewritten
+	if test -s "$state_dir"/rewritten
+	then
+		git notes copy --for-rewrite=rebase <"$state_dir"/rewritten
+		if test -x "$GIT_DIR"/hooks/post-rewrite
+		then
+			"$GIT_DIR"/hooks/post-rewrite rebase <"$state_dir"/rewritten
+		fi
 	fi
 	rm -r "$state_dir"
 	say All done.
diff --git a/grep.c b/grep.c
index 3821400966..f492d267cc 100644
--- a/grep.c
+++ b/grep.c
@@ -79,7 +79,7 @@ static void compile_pcre_regexp(struct grep_pat *p, const struct grep_opt *opt)
 {
 	const char *error;
 	int erroffset;
-	int options = 0;
+	int options = PCRE_MULTILINE;
 
 	if (opt->ignore_case)
 		options |= PCRE_CASELESS;
diff --git a/t/t4150-am.sh b/t/t4150-am.sh
index f1b60b8560..6f77fffee6 100755
--- a/t/t4150-am.sh
+++ b/t/t4150-am.sh
@@ -505,4 +505,14 @@ test_expect_success 'am -q is quiet' '
 	! test -s output.out
 '
 
+test_expect_success 'am empty-file does not infloop' '
+	rm -fr .git/rebase-apply &&
+	git reset --hard &&
+	touch empty-file &&
+	test_tick &&
+	{ git am empty-file > actual 2>&1 && false || :; } &&
+	echo Patch format detection failed. >expected &&
+	test_cmp expected actual
+'
+
 test_done
diff --git a/t/t9800-git-p4-basic.sh b/t/t9800-git-p4-basic.sh
index 04ee20e642..486c8eeb7e 100755
--- a/t/t9800-git-p4-basic.sh
+++ b/t/t9800-git-p4-basic.sh
@@ -234,8 +234,10 @@ test_expect_success 'refuse to preserve users without perms' '
 		git config git-p4.skipSubmitEditCheck true &&
 		echo "username-noperms: a change by alice" >>file1 &&
 		git commit --author "Alice <alice@localhost>" -m "perms: a change by alice" file1 &&
-		P4EDITOR=touch P4USER=bob P4PASSWD=secret test_must_fail "$GITP4" commit --preserve-user &&
-		test_must_fail git diff --exit-code HEAD..p4/master
+		P4EDITOR=touch P4USER=bob P4PASSWD=secret &&
+		export P4EDITOR P4USER P4PASSWD &&
+		test_must_fail "$GITP4" commit --preserve-user &&
+		! git diff --exit-code HEAD..p4/master
 	)
 '
 
@@ -250,13 +252,15 @@ test_expect_success 'preserve user where author is unknown to p4' '
 		git commit --author "Bob <bob@localhost>" -m "preserve: a change by bob" file1 &&
 		echo "username-unknown: a change by charlie" >>file1 &&
 		git commit --author "Charlie <charlie@localhost>" -m "preserve: a change by charlie" file1 &&
-		P4EDITOR=touch P4USER=alice P4PASSWD=secret test_must_fail "$GITP4" commit --preserve-user &&
-		test_must_fail git diff --exit-code HEAD..p4/master &&
+		P4EDITOR=touch P4USER=alice P4PASSWD=secret &&
+		export P4EDITOR P4USER P4PASSWD &&
+		test_must_fail "$GITP4" commit --preserve-user &&
+		! git diff --exit-code HEAD..p4/master &&
 
 		echo "$0: repeat with allowMissingP4Users enabled" &&
 		git config git-p4.allowMissingP4Users true &&
 		git config git-p4.preserveUser true &&
-		P4EDITOR=touch P4USER=alice P4PASSWD=secret "$GITP4" commit &&
+		"$GITP4" commit &&
 		git diff --exit-code HEAD..p4/master &&
 		p4_check_commit_author file1 alice
 	)
@@ -275,20 +279,22 @@ test_expect_success 'not preserving user with mixed authorship' '
 		p4_add_user derek Derek &&
 
 		make_change_by_user usernamefile3 Derek derek@localhost &&
-		P4EDITOR=cat P4USER=alice P4PASSWD=secret "$GITP4" commit |\
+		P4EDITOR=cat P4USER=alice P4PASSWD=secret &&
+		export P4EDITOR P4USER P4PASSWD &&
+		"$GITP4" commit |\
 		grep "git author derek@localhost does not match" &&
 
 		make_change_by_user usernamefile3 Charlie charlie@localhost &&
-		P4EDITOR=cat P4USER=alice P4PASSWD=secret "$GITP4" commit |\
+		"$GITP4" commit |\
 		grep "git author charlie@localhost does not match" &&
 
 		make_change_by_user usernamefile3 alice alice@localhost &&
-		P4EDITOR=cat P4USER=alice P4PASSWD=secret "$GITP4" |\
+		"$GITP4" commit |\
 		test_must_fail grep "git author.*does not match" &&
 
 		git config git-p4.skipUserNameCheck true &&
 		make_change_by_user usernamefile3 Charlie charlie@localhost &&
-		P4EDITOR=cat P4USER=alice P4PASSWD=secret "$GITP4" commit |\
+		"$GITP4" commit |\
 		test_must_fail grep "git author.*does not match" &&
 
 		p4_check_commit_author usernamefile3 alice
diff --git a/t/t9809-git-p4-client-view.sh b/t/t9809-git-p4-client-view.sh
index ae9145e307..773a516ff0 100755
--- a/t/t9809-git-p4-client-view.sh
+++ b/t/t9809-git-p4-client-view.sh
@@ -31,7 +31,7 @@ client_view() {
 #
 check_files_exist() {
 	ok=0 &&
-	num=${#@} &&
+	num=$# &&
 	for arg ; do
 		test_path_is_file "$arg" &&
 		ok=$(($ok + 1))
@@ -71,20 +71,24 @@ git_verify() {
 #   - dir2
 #     - file21
 #     - file22
+init_depot() {
+	for d in 1 2 ; do
+		mkdir -p dir$d &&
+		for f in 1 2 ; do
+			echo dir$d/file$d$f >dir$d/file$d$f &&
+			p4 add dir$d/file$d$f &&
+			p4 submit -d "dir$d/file$d$f"
+		done
+	done &&
+	find . -type f ! -name files >files &&
+	check_files_exist dir1/file11 dir1/file12 \
+			  dir2/file21 dir2/file22
+}
+
 test_expect_success 'init depot' '
 	(
 		cd "$cli" &&
-		for d in 1 2 ; do
-			mkdir -p dir$d &&
-			for f in 1 2 ; do
-				echo dir$d/file$d$f >dir$d/file$d$f &&
-				p4 add dir$d/file$d$f &&
-				p4 submit -d "dir$d/file$d$f"
-			done
-		done &&
-		find . -type f ! -name files >files &&
-		check_files_exist dir1/file11 dir1/file12 \
-				  dir2/file21 dir2/file22
+		init_depot
 	)
 '
 
@@ -247,6 +251,139 @@ test_expect_success 'quotes on rhs only' '
 '
 
 #
+# Submit tests
+#
+
+# clone sets variable
+test_expect_success 'clone --use-client-spec sets useClientSpec' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot &&
+	(
+		cd "$git" &&
+		git config --bool git-p4.useClientSpec >actual &&
+		echo true >true &&
+		test_cmp actual true
+	)
+'
+
+# clone just a subdir of the client spec
+test_expect_success 'subdir clone' '
+	client_view "//depot/... //client/..." &&
+	files="dir1/file11 dir1/file12 dir2/file21 dir2/file22" &&
+	client_verify $files &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	git_verify dir1/file11 dir1/file12
+'
+
+#
+# submit back, see what happens:  five cases
+#
+test_expect_success 'subdir clone, submit modify' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+		echo line >>dir1/file12 &&
+		git add dir1/file12 &&
+		git commit -m dir1/file12 &&
+		"$GITP4" submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file dir1/file12 &&
+		test_line_count = 2 dir1/file12
+	)
+'
+
+test_expect_success 'subdir clone, submit add' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+		echo file13 >dir1/file13 &&
+		git add dir1/file13 &&
+		git commit -m dir1/file13 &&
+		"$GITP4" submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file dir1/file13
+	)
+'
+
+test_expect_success 'subdir clone, submit delete' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+		git rm dir1/file12 &&
+		git commit -m "delete dir1/file12" &&
+		"$GITP4" submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_missing dir1/file12
+	)
+'
+
+test_expect_success 'subdir clone, submit copy' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+		git config git-p4.detectCopies true &&
+		cp dir1/file11 dir1/file11a &&
+		git add dir1/file11a &&
+		git commit -m "copy to dir1/file11a" &&
+		"$GITP4" submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_file dir1/file11a
+	)
+'
+
+test_expect_success 'subdir clone, submit rename' '
+	client_view "//depot/... //client/..." &&
+	test_when_finished cleanup_git &&
+	"$GITP4" clone --use-client-spec --dest="$git" //depot/dir1 &&
+	(
+		cd "$git" &&
+		git config git-p4.skipSubmitEdit true &&
+		git config git-p4.detectRenames true &&
+		git mv dir1/file13 dir1/file13a &&
+		git commit -m "rename dir1/file13 to dir1/file13a" &&
+		"$GITP4" submit
+	) &&
+	(
+		cd "$cli" &&
+		test_path_is_missing dir1/file13 &&
+		test_path_is_file dir1/file13a
+	)
+'
+
+test_expect_success 'reinit depot' '
+	(
+		cd "$cli" &&
+		p4 sync -f &&
+		rm files &&
+		p4 delete */* &&
+		p4 submit -d "delete all files" &&
+		init_depot
+	)
+'
+
+#
 # What happens when two files of the same name are overlayed together?
 # The last-listed file should take preference.
 #