From bb605e68d4945f2f8667babaf09da26333f8b605 Mon Sep 17 00:00:00 2001
From: Thomas Koutcher <thomas.koutcher@online.fr>
Date: Fri, 19 Nov 2021 22:25:32 +0100
Subject: [PATCH] Print the PCRE version

Also add PCRE2 to contrib/config.make and config.make-Darwin.

This is a complement to 6f609b193844ffe8a2287d0846c52d74bd6b83db.
---
 configure.ac               |  1 +
 contrib/config.make        |  4 ++++
 contrib/config.make-Darwin | 12 ++++++++++--
 src/tig.c                  | 15 +++++++++++++++
 4 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index ba03e5028..cf55c658f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -43,6 +43,7 @@ AS_IF([test "x$with_pcre" != xno], [
 	AS_IF([test "x$ac_cv_header_pcre2posix_h" = xyes], [
 		AC_CHECK_LIB([pcre2-posix], [regexec], [
 			AC_DEFINE([HAVE_PCRE2], [1], [Define if you have PCRE2])
+			AC_DEFINE([PCRE2_CODE_UNIT_WIDTH], [8], [ ])
 			LIBS="$LIBS -lpcre2-posix -lpcre2-8"
 		])
 	])
diff --git a/contrib/config.make b/contrib/config.make
index b2adda8fb..e656a3660 100755
--- a/contrib/config.make
+++ b/contrib/config.make
@@ -11,6 +11,10 @@ CPPFLAGS = -DHAVE_NCURSESW_CURSES_H
 #LDLIBS += -lreadline
 #CPPFLAGS += -DHAVE_READLINE
 
+# Use PCRE2.
+#LDLIBS += -lpcre2-posix -lpcre2-8
+#CPPFLAGS += -DHAVE_PCRE2 -DPCRE2_CODE_UNIT_WIDTH=8
+
 # Uncomment to enable work-around for missing setenv().
 #NO_SETENV=y
 
diff --git a/contrib/config.make-Darwin b/contrib/config.make-Darwin
index b08ed0a9d..95055dc12 100644
--- a/contrib/config.make-Darwin
+++ b/contrib/config.make-Darwin
@@ -6,7 +6,7 @@ export XML_CATALOG_FILES=/usr/local/etc/xml/catalog
 TIG_CFLAGS += -DHAVE_EXECINFO_H
 TIG_LDLIBS = -liconv
 
-NCURSES_DIR = $(wildcard /usr/local/opt/ncurses)
+NCURSES_DIR ?= $(wildcard /usr/local/opt/ncurses)
 
 ifneq ($(NCURSES_DIR),)
 	TIG_NCURSES = -lncursesw
@@ -16,7 +16,7 @@ else
 	TIG_CPPFLAGS += -DHAVE_CURSES_H
 endif
 
-READLINE_DIR = $(wildcard /usr/local/opt/readline)
+READLINE_DIR ?= $(wildcard /usr/local/opt/readline)
 
 ifneq ($(READLINE_DIR),)
 	TIG_LDLIBS += -lreadline
@@ -24,4 +24,12 @@ ifneq ($(READLINE_DIR),)
 	TIG_CPPFLAGS += -I$(READLINE_DIR)/include -DHAVE_READLINE
 endif
 
+PCRE2_DIR ?= $(wildcard /usr/local/opt/pcre2)
+
+ifneq ($(PCRE2_DIR),)
+	TIG_LDLIBS += -lpcre2-posix -lpcre2-8
+	TIG_LDFLAGS += -L$(PCRE2_DIR)/lib
+	TIG_CPPFLAGS += -I$(PCRE2_DIR)/include -DHAVE_PCRE2 -DPCRE2_CODE_UNIT_WIDTH=8
+endif
+
 # vim: ft=make:
diff --git a/src/tig.c b/src/tig.c
index 1c332f526..c6b107536 100644
--- a/src/tig.c
+++ b/src/tig.c
@@ -54,6 +54,12 @@
 #include <readline/readline.h>
 #endif /* HAVE_READLINE */
 
+#if defined HAVE_PCRE2
+#include <pcre2.h>
+#elif defined HAVE_PCRE
+#include <pcre.h>
+#endif
+
 static bool
 forward_request_to_child(struct view *child, enum request request)
 {
@@ -542,6 +548,9 @@ parse_options(int argc, const char *argv[], bool pager_mode)
 				seen_dashdash = true;
 
 			} else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
+#if defined HAVE_PCRE2
+				char pcre2_version[64];
+#endif
 				printf("tig version %s\n", TIG_VERSION);
 #ifdef NCURSES_VERSION
 				printf("%s version %s.%d\n",
@@ -554,6 +563,12 @@ parse_options(int argc, const char *argv[], bool pager_mode)
 #endif
 #ifdef HAVE_READLINE
 				printf("readline version %s\n", rl_library_version);
+#endif
+#if defined HAVE_PCRE2
+				pcre2_config(PCRE2_CONFIG_VERSION, pcre2_version);
+				printf("PCRE2 version %s\n", pcre2_version);
+#elif defined HAVE_PCRE
+				printf("PCRE version %s\n", pcre_version());
 #endif
 				exit(EXIT_SUCCESS);