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[2a01:4f8:120:2468::2]) by smtp.gmail.com with ESMTPSA id s19sm19810139wrf.72.2021.01.23.17.58.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 23 Jan 2021 17:58:38 -0800 (PST) From: =?utf-8?b?w4Z2YXIgQXJuZmrDtnLDsCBCamFybWFzb24=?= To: git@vger.kernel.org Cc: Junio C Hamano , =?utf-8?q?Carlo_Marcelo_Arenas_Bel?= =?utf-8?q?=C3=B3n?= , =?utf-8?b?w4Z2YXIgQXJuZmrDtnI=?= =?utf-8?b?w7AgQmphcm1hc29u?= Subject: [PATCH 2/2] Remove support for v1 of the PCRE library Date: Sun, 24 Jan 2021 02:58:33 +0100 Message-Id: <20210124015833.2753-2-avarab@gmail.com> X-Mailer: git-send-email 2.29.2.222.g5d2a92d10f8 In-Reply-To: <20210124015833.2753-1-avarab@gmail.com> References: <20210124015833.2753-1-avarab@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Remove support for using version 1 of the PCRE library. Its use has been discouraged by upstream for a long time, and it's in a bugfix-only state. Anyone who was relying on v1 in particular got a nudge to move to v2 in e6c531b808 (Makefile: make USE_LIBPCRE=YesPlease mean v2, not v1, 2018-03-11), which was first released as part of v2.18.0. With this the LIBPCRE2 test prerequisites is redundant to PCRE. But I'm keeping it for self-documentation purposes, and to avoid conflict with other in-flight PCRE patches. I'm also not changing all of our own "pcre2" names to "pcre", i.e. the inverse of 6d4b5747f0 (grep: change internal *pcre* variable & function names to be *pcre1*, 2017-05-25). I don't see the point, and it makes the history/blame harder to read. Maybe if there's ever a PCRE v3... Signed-off-by: Ævar Arnfjörð Bjarmason --- Makefile | 32 ++------ configure.ac | 51 ++---------- contrib/buildsystems/CMakeLists.txt | 4 - grep.c | 119 +--------------------------- grep.h | 14 ---- t/README | 12 --- t/test-lib.sh | 3 +- 7 files changed, 18 insertions(+), 217 deletions(-) diff --git a/Makefile b/Makefile index 4edfda3e00..cd0ff9a040 100644 --- a/Makefile +++ b/Makefile @@ -29,18 +29,11 @@ all:: # Perl-compatible regular expressions instead of standard or extended # POSIX regular expressions. # -# USE_LIBPCRE is a synonym for USE_LIBPCRE2, define USE_LIBPCRE1 -# instead if you'd like to use the legacy version 1 of the PCRE -# library. Support for version 1 will likely be removed in some future -# release of Git, as upstream has all but abandoned it. -# -# When using USE_LIBPCRE1, define NO_LIBPCRE1_JIT if you want to -# disable JIT even if supported by your library. +# Only libpcre version 2 is supported. USE_LIBPCRE2 is a synonym for +# USE_LIBPCRE, support for the old USE_LIBPCRE1 has been removed. # # Define LIBPCREDIR=/foo/bar if your PCRE header and library files are -# in /foo/bar/include and /foo/bar/lib directories. Which version of -# PCRE this points to determined by the USE_LIBPCRE1 and USE_LIBPCRE2 -# variables. +# in /foo/bar/include and /foo/bar/lib directories. # # Define HAVE_ALLOCA_H if you have working alloca(3) defined in that header. # @@ -1359,26 +1352,17 @@ ifdef NO_LIBGEN_H COMPAT_OBJS += compat/basename.o endif +ifdef USE_LIBPCRE1 +$(error The USE_LIBPCRE1 build option has been removed, use version 2 with USE_LIBPCRE) +endif + USE_LIBPCRE2 ?= $(USE_LIBPCRE) ifneq (,$(USE_LIBPCRE2)) - ifdef USE_LIBPCRE1 -$(error Only set USE_LIBPCRE2 (or its alias USE_LIBPCRE) or USE_LIBPCRE1, not both!) - endif - BASIC_CFLAGS += -DUSE_LIBPCRE2 EXTLIBS += -lpcre2-8 endif -ifdef USE_LIBPCRE1 - BASIC_CFLAGS += -DUSE_LIBPCRE1 - EXTLIBS += -lpcre - -ifdef NO_LIBPCRE1_JIT - BASIC_CFLAGS += -DNO_LIBPCRE1_JIT -endif -endif - ifdef LIBPCREDIR BASIC_CFLAGS += -I$(LIBPCREDIR)/include EXTLIBS += -L$(LIBPCREDIR)/$(lib) $(CC_LD_DYNPATH)$(LIBPCREDIR)/$(lib) @@ -2726,9 +2710,7 @@ GIT-BUILD-OPTIONS: FORCE @echo TAR=\''$(subst ','\'',$(subst ','\'',$(TAR)))'\' >>$@+ @echo NO_CURL=\''$(subst ','\'',$(subst ','\'',$(NO_CURL)))'\' >>$@+ @echo NO_EXPAT=\''$(subst ','\'',$(subst ','\'',$(NO_EXPAT)))'\' >>$@+ - @echo USE_LIBPCRE1=\''$(subst ','\'',$(subst ','\'',$(USE_LIBPCRE1)))'\' >>$@+ @echo USE_LIBPCRE2=\''$(subst ','\'',$(subst ','\'',$(USE_LIBPCRE2)))'\' >>$@+ - @echo NO_LIBPCRE1_JIT=\''$(subst ','\'',$(subst ','\'',$(NO_LIBPCRE1_JIT)))'\' >>$@+ @echo NO_PERL=\''$(subst ','\'',$(subst ','\'',$(NO_PERL)))'\' >>$@+ @echo NO_PTHREADS=\''$(subst ','\'',$(subst ','\'',$(NO_PTHREADS)))'\' >>$@+ @echo NO_PYTHON=\''$(subst ','\'',$(subst ','\'',$(NO_PYTHON)))'\' >>$@+ diff --git a/configure.ac b/configure.ac index 66aedb9288..031e8d3fee 100644 --- a/configure.ac +++ b/configure.ac @@ -252,16 +252,17 @@ GIT_PARSE_WITH([openssl])) # Define USE_LIBPCRE if you have and want to use libpcre. Various # commands such as log and grep offer runtime options to use # Perl-compatible regular expressions instead of standard or extended -# POSIX regular expressions. -# -# USE_LIBPCRE is a synonym for USE_LIBPCRE2, define USE_LIBPCRE1 -# instead if you'd like to use the legacy version 1 of the PCRE -# library. Support for version 1 will likely be removed in some future -# release of Git, as upstream has all but abandoned it. +# POSIX regular expressions. Only libpcre version 2 is supported. # # Define LIBPCREDIR=/foo/bar if your PCRE header and library files are in # /foo/bar/include and /foo/bar/lib directories. # + +AC_ARG_WITH(libpcre1, +AS_HELP_STRING([--with-libpcre1],[DEPRECATED]), + AC_MSG_ERROR([support for --with-libpcre1 has been removed. Use --with-libpcre2!]) + ) + AC_ARG_WITH(libpcre, AS_HELP_STRING([--with-libpcre],[synonym for --with-libpcre2]), if test "$withval" = "no"; then @@ -277,22 +278,6 @@ AS_HELP_STRING([--with-libpcre],[synonym for --with-libpcre2]), GIT_CONF_SUBST([LIBPCREDIR]) fi) -AC_ARG_WITH(libpcre1, -AS_HELP_STRING([--with-libpcre1],[support Perl-compatible regexes via libpcre1 (default is NO)]) -AS_HELP_STRING([], [ARG can be also prefix for libpcre library and headers]), - if test "$withval" = "no"; then - USE_LIBPCRE1= - elif test "$withval" = "yes"; then - USE_LIBPCRE1=YesPlease - else - USE_LIBPCRE1=YesPlease - LIBPCREDIR=$withval - AC_MSG_NOTICE([Setting LIBPCREDIR to $LIBPCREDIR]) - dnl USE_LIBPCRE1 can still be modified below, so don't substitute - dnl it yet. - GIT_CONF_SUBST([LIBPCREDIR]) - fi) - AC_ARG_WITH(libpcre2, AS_HELP_STRING([--with-libpcre2],[support Perl-compatible regexes via libpcre2 (default is NO)]) AS_HELP_STRING([], [ARG can be also prefix for libpcre library and headers]), @@ -300,10 +285,6 @@ AS_HELP_STRING([], [ARG can be also prefix for libpcre library and hea AC_MSG_ERROR([Only supply one of --with-libpcre or its synonym --with-libpcre2!]) fi - if test -n "$USE_LIBPCRE1"; then - AC_MSG_ERROR([Only supply one of --with-libpcre1 or --with-libpcre2!]) - fi - if test "$withval" = "no"; then USE_LIBPCRE2= elif test "$withval" = "yes"; then @@ -554,25 +535,9 @@ GIT_CONF_SUBST([NEEDS_SSL_WITH_CRYPTO]) GIT_CONF_SUBST([NO_OPENSSL]) # -# Handle the USE_LIBPCRE1 and USE_LIBPCRE2 options potentially set -# above. +# Handle the USE_LIBPCRE options potentially set above. # -if test -n "$USE_LIBPCRE1"; then - -GIT_STASH_FLAGS($LIBPCREDIR) - -AC_CHECK_LIB([pcre], [pcre_version], -[USE_LIBPCRE1=YesPlease], -[USE_LIBPCRE1=]) - -GIT_UNSTASH_FLAGS($LIBPCREDIR) - -GIT_CONF_SUBST([USE_LIBPCRE1]) - -fi - - if test -n "$USE_LIBPCRE2"; then GIT_STASH_FLAGS($LIBPCREDIR) diff --git a/contrib/buildsystems/CMakeLists.txt b/contrib/buildsystems/CMakeLists.txt index c151dd7257..ac3dbc079a 100644 --- a/contrib/buildsystems/CMakeLists.txt +++ b/contrib/buildsystems/CMakeLists.txt @@ -910,9 +910,7 @@ set(PYTHON_PATH /usr/bin/python) set(TAR tar) set(NO_CURL ) set(NO_EXPAT ) -set(USE_LIBPCRE1 ) set(USE_LIBPCRE2 ) -set(NO_LIBPCRE1_JIT ) set(NO_PERL ) set(NO_PTHREADS ) set(NO_PYTHON ) @@ -949,8 +947,6 @@ file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "PYTHON_PATH='${PYTHON_PATH}'\ file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "TAR='${TAR}'\n") file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_CURL='${NO_CURL}'\n") file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_EXPAT='${NO_EXPAT}'\n") -file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "USE_LIBPCRE1='${USE_LIBPCRE1}'\n") -file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_LIBPCRE1_JIT='${NO_LIBPCRE1_JIT}'\n") file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PERL='${NO_PERL}'\n") file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_PTHREADS='${NO_PTHREADS}'\n") file(APPEND ${CMAKE_BINARY_DIR}/GIT-BUILD-OPTIONS "NO_UNIX_SOCKETS='${NO_UNIX_SOCKETS}'\n") diff --git a/grep.c b/grep.c index efeb6dc58d..ad994d6923 100644 --- a/grep.c +++ b/grep.c @@ -166,11 +166,6 @@ void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix pcre2_malloc, pcre2_free, NULL); #endif -#ifdef USE_LIBPCRE1 - pcre_malloc = malloc; - pcre_free = free; -#endif - *opt = grep_defaults; opt->repo = repo; @@ -223,17 +218,7 @@ static void grep_set_pattern_type_option(enum grep_pattern_type pattern_type, st break; case GREP_PATTERN_TYPE_PCRE: -#ifdef USE_LIBPCRE2 opt->pcre2 = 1; -#else - /* - * It's important that pcre1 always be assigned to - * even when there's no USE_LIBPCRE* defined. We still - * call the PCRE stub function, it just dies with - * "cannot use Perl-compatible regexes[...]". - */ - opt->pcre1 = 1; -#endif break; } } @@ -377,92 +362,6 @@ static int is_fixed(const char *s, size_t len) return 1; } -#ifdef USE_LIBPCRE1 -static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) -{ - const char *error; - int erroffset; - int options = PCRE_MULTILINE; - int study_options = 0; - - if (opt->ignore_case) { - if (!opt->ignore_locale && has_non_ascii(p->pattern)) - p->pcre1_tables = pcre_maketables(); - options |= PCRE_CASELESS; - } - if (!opt->ignore_locale && is_utf8_locale() && has_non_ascii(p->pattern)) - options |= PCRE_UTF8; - - p->pcre1_regexp = pcre_compile(p->pattern, options, &error, &erroffset, - p->pcre1_tables); - if (!p->pcre1_regexp) - compile_regexp_failed(p, error); - -#if defined(PCRE_CONFIG_JIT) && !defined(NO_LIBPCRE1_JIT) - pcre_config(PCRE_CONFIG_JIT, &p->pcre1_jit_on); - if (opt->debug) - fprintf(stderr, "pcre1_jit_on=%d\n", p->pcre1_jit_on); - - if (p->pcre1_jit_on) - study_options = PCRE_STUDY_JIT_COMPILE; -#endif - - p->pcre1_extra_info = pcre_study(p->pcre1_regexp, study_options, &error); - if (!p->pcre1_extra_info && error) - die("%s", error); -} - -static int pcre1match(struct grep_pat *p, const char *line, const char *eol, - regmatch_t *match, int eflags) -{ - int ovector[30], ret, flags = PCRE_NO_UTF8_CHECK; - - if (eflags & REG_NOTBOL) - flags |= PCRE_NOTBOL; - - ret = pcre_exec(p->pcre1_regexp, p->pcre1_extra_info, line, - eol - line, 0, flags, ovector, - ARRAY_SIZE(ovector)); - - if (ret < 0 && ret != PCRE_ERROR_NOMATCH) - die("pcre_exec failed with error code %d", ret); - if (ret > 0) { - ret = 0; - match->rm_so = ovector[0]; - match->rm_eo = ovector[1]; - } - - return ret; -} - -static void free_pcre1_regexp(struct grep_pat *p) -{ - pcre_free(p->pcre1_regexp); -#ifdef PCRE_CONFIG_JIT - if (p->pcre1_jit_on) - pcre_free_study(p->pcre1_extra_info); - else -#endif - pcre_free(p->pcre1_extra_info); - pcre_free((void *)p->pcre1_tables); -} -#else /* !USE_LIBPCRE1 */ -static void compile_pcre1_regexp(struct grep_pat *p, const struct grep_opt *opt) -{ - die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); -} - -static int pcre1match(struct grep_pat *p, const char *line, const char *eol, - regmatch_t *match, int eflags) -{ - return 1; -} - -static void free_pcre1_regexp(struct grep_pat *p) -{ -} -#endif /* !USE_LIBPCRE1 */ - #ifdef USE_LIBPCRE2 static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) { @@ -588,11 +487,6 @@ static void free_pcre2_pattern(struct grep_pat *p) #else /* !USE_LIBPCRE2 */ static void compile_pcre2_pattern(struct grep_pat *p, const struct grep_opt *opt) { - /* - * Unreachable until USE_LIBPCRE2 becomes synonymous with - * USE_LIBPCRE. See the sibling comment in - * grep_set_pattern_type_option(). - */ die("cannot use Perl-compatible regexes when not compiled with USE_LIBPCRE"); } @@ -693,11 +587,6 @@ static void compile_regexp(struct grep_pat *p, struct grep_opt *opt) return; } - if (opt->pcre1) { - compile_pcre1_regexp(p, opt); - return; - } - if (p->ignore_case) regflags |= REG_ICASE; if (opt->extended_regexp_option) @@ -1051,9 +940,7 @@ void free_grep_patterns(struct grep_opt *opt) case GREP_PATTERN: /* atom */ case GREP_PATTERN_HEAD: case GREP_PATTERN_BODY: - if (p->pcre1_regexp) - free_pcre1_regexp(p); - else if (p->pcre2_pattern) + if (p->pcre2_pattern) free_pcre2_pattern(p); else regfree(&p->regexp); @@ -1116,9 +1003,7 @@ static int patmatch(struct grep_pat *p, char *line, char *eol, { int hit; - if (p->pcre1_regexp) - hit = !pcre1match(p, line, eol, match, eflags); - else if (p->pcre2_pattern) + if (p->pcre2_pattern) hit = !pcre2match(p, line, eol, match, eflags); else hit = !regexec_buf(&p->regexp, line, eol - line, 1, match, diff --git a/grep.h b/grep.h index b5c4e223a8..f8b495869f 100644 --- a/grep.h +++ b/grep.h @@ -1,15 +1,6 @@ #ifndef GREP_H #define GREP_H #include "color.h" -#ifdef USE_LIBPCRE1 -#include -#ifndef PCRE_NO_UTF8_CHECK -#define PCRE_NO_UTF8_CHECK 0 -#endif -#else -typedef int pcre; -typedef int pcre_extra; -#endif #ifdef USE_LIBPCRE2 #define PCRE2_CODE_UNIT_WIDTH 8 #include @@ -71,10 +62,6 @@ struct grep_pat { size_t patternlen; enum grep_header_field field; regex_t regexp; - pcre *pcre1_regexp; - pcre_extra *pcre1_extra_info; - const unsigned char *pcre1_tables; - int pcre1_jit_on; pcre2_code *pcre2_pattern; pcre2_match_data *pcre2_match_data; pcre2_compile_context *pcre2_compile_context; @@ -144,7 +131,6 @@ struct grep_opt { int allow_textconv; int extended; int use_reflog_filter; - int pcre1; int pcre2; int relative; int pathname; diff --git a/t/README b/t/README index c730a70770..5398994eba 100644 --- a/t/README +++ b/t/README @@ -1104,18 +1104,6 @@ use these, and "test_set_prereq" for how to define your own. Git was compiled with support for PCRE. Wrap any tests that use git-grep --perl-regexp or git-grep -P in these. - - LIBPCRE1 - - Git was compiled with PCRE v1 support via - USE_LIBPCRE1=YesPlease. Wrap any PCRE using tests that for some - reason need v1 of the PCRE library instead of v2 in these. - - - LIBPCRE2 - - Git was compiled with PCRE v2 support via - USE_LIBPCRE2=YesPlease. Wrap any PCRE using tests that for some - reason need v2 of the PCRE library instead of v1 in these. - - CASE_INSENSITIVE_FS Test is run on a case insensitive file system. diff --git a/t/test-lib.sh b/t/test-lib.sh index 03c1c0836f..2996d7c54c 100644 --- a/t/test-lib.sh +++ b/t/test-lib.sh @@ -1524,8 +1524,7 @@ esac test -z "$NO_PERL" && test_set_prereq PERL test -z "$NO_PTHREADS" && test_set_prereq PTHREADS test -z "$NO_PYTHON" && test_set_prereq PYTHON -test -n "$USE_LIBPCRE1$USE_LIBPCRE2" && test_set_prereq PCRE -test -n "$USE_LIBPCRE1" && test_set_prereq LIBPCRE1 +test -n "$USE_LIBPCRE2" && test_set_prereq PCRE test -n "$USE_LIBPCRE2" && test_set_prereq LIBPCRE2 test -z "$NO_GETTEXT" && test_set_prereq GETTEXT