lockfile: allow reopening a closed but still locked file

diff --git a/Makefile b/Makefile
index a53f3a8326c2e62dc79bae7169d64137ac3dab20..028749bfcacc62c531b8e58d5297ff149e211646 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -34,8 +34,18 @@ all::
 # git-http-push are not built, and you cannot use http:// and https://
 # transports (neither smart nor dumb).
 #
+# Define CURL_CONFIG to the path to a curl-config binary other than the
+# default 'curl-config'.  If CURL_CONFIG is unset or points to a binary that
+# is not found, defaults to the CURLDIR behavior.
+#
+# Define CURL_STATIC to statically link libcurl.  Only applies if
+# CURL_CONFIG is used.
+#
 # Define CURLDIR=/foo/bar if your curl header and library files are in
-# /foo/bar/include and /foo/bar/lib directories.
+# /foo/bar/include and /foo/bar/lib directories.  This overrides
+# CURL_CONFIG, but is less robust.  If not set, and CURL_CONFIG is not set,
+# uses -lcurl with no additional library detection (other than
+# NEEDS_*_WITH_CURL).
 #
 # Define NO_EXPAT if you do not have expat installed.  git-http-push is
 # not built, and you cannot push using http:// and https:// transports (dumb).
@@ -143,9 +153,11 @@ all::
 #
 # Define NEEDS_SSL_WITH_CRYPTO if you need -lssl when using -lcrypto (Darwin).
 #
-# Define NEEDS_SSL_WITH_CURL if you need -lssl with -lcurl (Minix).
+# Define NEEDS_SSL_WITH_CURL if you need -lssl with -lcurl (Minix).  Only used
+# if CURLDIR is set.
 #
-# Define NEEDS_IDN_WITH_CURL if you need -lidn when using -lcurl (Minix).
+# Define NEEDS_IDN_WITH_CURL if you need -lidn when using -lcurl (Minix).  Only
+# used if CURLDIR is set.
 #
 # Define NEEDS_LIBICONV if linking with libc is not enough (Darwin).
 #
@@ -553,6 +565,7 @@ TEST_PROGRAMS_NEED_X += test-ctype
 TEST_PROGRAMS_NEED_X += test-date
 TEST_PROGRAMS_NEED_X += test-delta
 TEST_PROGRAMS_NEED_X += test-dump-cache-tree
+TEST_PROGRAMS_NEED_X += test-dump-split-index
 TEST_PROGRAMS_NEED_X += test-genrandom
 TEST_PROGRAMS_NEED_X += test-hashmap
 TEST_PROGRAMS_NEED_X += test-index-version
@@ -875,6 +888,7 @@ LIB_OBJS += sha1_name.o
 LIB_OBJS += shallow.o
 LIB_OBJS += sideband.o
 LIB_OBJS += sigchain.o
+LIB_OBJS += split-index.o
 LIB_OBJS += strbuf.o
 LIB_OBJS += streaming.o
 LIB_OBJS += string-list.o
@@ -1118,20 +1132,44 @@ ifdef NO_CURL
        REMOTE_CURL_NAMES =
 else
        ifdef CURLDIR
-               # Try "-Wl,-rpath=$(CURLDIR)/$(lib)" in such a case.
-               BASIC_CFLAGS += -I$(CURLDIR)/include
-               CURL_LIBCURL = -L$(CURLDIR)/$(lib) $(CC_LD_DYNPATH)$(CURLDIR)/$(lib) -lcurl
+               CURL_LIBCURL =
        else
-               CURL_LIBCURL = -lcurl
-       endif
-       ifdef NEEDS_SSL_WITH_CURL
-               CURL_LIBCURL += -lssl
-               ifdef NEEDS_CRYPTO_WITH_SSL
-                       CURL_LIBCURL += -lcrypto
+               CURL_CONFIG = curl-config
+               ifeq "$(CURL_CONFIG)" ""
+                       CURL_LIBCURL =
+               else
+                       CURL_LIBCURL := $(shell $(CURL_CONFIG) --libs)
                endif
        endif
-       ifdef NEEDS_IDN_WITH_CURL
-               CURL_LIBCURL += -lidn
+
+       ifeq "$(CURL_LIBCURL)" ""
+               ifdef CURL_STATIC
+$(error "CURL_STATIC must be used with CURL_CONFIG")
+               endif
+               ifdef CURLDIR
+                       # Try "-Wl,-rpath=$(CURLDIR)/$(lib)" in such a case.
+                       BASIC_CFLAGS += -I$(CURLDIR)/include
+                       CURL_LIBCURL = -L$(CURLDIR)/$(lib) $(CC_LD_DYNPATH)$(CURLDIR)/$(lib) -lcurl
+               else
+                       CURL_LIBCURL = -lcurl
+               endif
+               ifdef NEEDS_SSL_WITH_CURL
+                       CURL_LIBCURL += -lssl
+                       ifdef NEEDS_CRYPTO_WITH_SSL
+                               CURL_LIBCURL += -lcrypto
+                       endif
+               endif
+               ifdef NEEDS_IDN_WITH_CURL
+                       CURL_LIBCURL += -lidn
+               endif
+       else
+               BASIC_CFLAGS += $(shell $(CURL_CONFIG) --cflags)
+               ifdef CURL_STATIC
+                       CURL_LIBCURL = $(shell $(CURL_CONFIG) --static-libs)
+                       ifeq "$(CURL_LIBCURL)" ""
+$(error libcurl not detected or not compiled with static support)
+                       endif
+               endif
        endif
 
        REMOTE_CURL_PRIMARY = git-remote-http$X