configure: optional library sfsexp

The configure part is essentially the same as the other checks using
pkg-config. Since the optional inclusion of this feature changes what
options are available to the user, include it in the "built_with"
pseudo-configuration keys.

configure

@@ -820,6 +820,19 @@ else
     WITH_BASH=0
 fi
 
+printf "Checking for sfsexp... "
+if pkg-config --exists sfsexp; then
+    printf "Yes.\n"
+    have_sfsexp=1
+    sfsexp_cflags=$(pkg-config --cflags sfsexp)
+    sfsexp_ldflags=$(pkg-config --libs sfsexp)
+else
+    printf "No (will not enable s-expression queries).\n"
+    have_sfsexp=0
+    sfsexp_cflags=
+    sfsexp_ldflags=
+fi
+
 if [ -z "${EMACSLISPDIR-}" ]; then
     EMACSLISPDIR="\$(prefix)/share/emacs/site-lisp"
 fi
@@ -1443,6 +1456,13 @@ HAVE_VALGRIND = ${have_valgrind}
 # And if so, flags needed at compile time for valgrind macros
 VALGRIND_CFLAGS = ${valgrind_cflags}
 
+# Whether the sfsexp library is available
+HAVE_SFSEXP = ${have_sfsexp}
+
+# And if so, flags needed at compile/link time for sfsexp
+SFSEXP_CFLAGS = ${sfsexp_cflags}
+SFSEXP_LDFLAGS = ${sfsexp_ldflags}
+
 # Support for emacs
 WITH_EMACS = ${WITH_EMACS}
 
@@ -1459,6 +1479,7 @@ WITH_ZSH = ${WITH_ZSH}
 COMMON_CONFIGURE_CFLAGS = \\
 	\$(GMIME_CFLAGS) \$(TALLOC_CFLAGS) \$(ZLIB_CFLAGS)	\\
 	-DHAVE_VALGRIND=\$(HAVE_VALGRIND) \$(VALGRIND_CFLAGS)	\\
+	-DHAVE_SFSEXP=\$(HAVE_SFSEXP) \$(SFSEXP_CFLAGS)		\\
 	-DHAVE_GETLINE=\$(HAVE_GETLINE)				\\
 	-DWITH_EMACS=\$(WITH_EMACS)				\\
 	-DHAVE_CANONICALIZE_FILE_NAME=\$(HAVE_CANONICALIZE_FILE_NAME) \\
@@ -1475,7 +1496,7 @@ CONFIGURE_CFLAGS = \$(COMMON_CONFIGURE_CFLAGS)
 
 CONFIGURE_CXXFLAGS = \$(COMMON_CONFIGURE_CFLAGS) \$(XAPIAN_CXXFLAGS)
 
-CONFIGURE_LDFLAGS = \$(GMIME_LDFLAGS) \$(TALLOC_LDFLAGS) \$(ZLIB_LDFLAGS) \$(XAPIAN_LDFLAGS)
+CONFIGURE_LDFLAGS = \$(GMIME_LDFLAGS) \$(TALLOC_LDFLAGS) \$(ZLIB_LDFLAGS) \$(XAPIAN_LDFLAGS) \$(SFSEXP_LDFLAGS)
 EOF
 
 # construct the sh.config
@@ -1524,6 +1545,9 @@ NOTMUCH_HAVE_PYTHON3_CFFI=${have_python3_cffi}
 # Is the python pytest package available?
 NOTMUCH_HAVE_PYTHON3_PYTEST=${have_python3_pytest}
 
+# Is the sfsexp library available?
+NOTMUCH_HAVE_SFSEXP=${have_sfsexp}
+
 # Platform we are run on
 PLATFORM=${platform}
 EOF

lib/built-with.c

@@ -32,6 +32,8 @@ notmuch_built_with (const char *name)
 	return HAVE_XAPIAN_DB_RETRY_LOCK;
     } else if (STRNCMP_LITERAL (name, "session_key") == 0) {
 	return true;
+    } else if (STRNCMP_LITERAL (name, "sexpr_query") == 0) {
+	return HAVE_SFSEXP;
     } else {
 	return false;
     }

notmuch-config.c

@@ -679,6 +679,9 @@ _notmuch_config_list_built_with ()
     printf ("%sretry_lock=%s\n",
 	    BUILT_WITH_PREFIX,
 	    notmuch_built_with ("retry_lock") ? "true" : "false");
+    printf ("%ssexpr_query=%s\n",
+	    BUILT_WITH_PREFIX,
+	    notmuch_built_with ("sexpr_query") ? "true" : "false");
 }
 
 static int

test/T030-config.sh

@@ -51,6 +51,7 @@ cat <<EOF > EXPECTED
 built_with.compact=something
 built_with.field_processor=something
 built_with.retry_lock=something
+built_with.sexpr_query=something
 database.autocommit=8000
 database.mail_root=MAIL_DIR
 database.path=MAIL_DIR

test/T055-path-config.sh

@@ -266,7 +266,7 @@ EOF
    test_expect_equal "${output}+${output2}" "${value}+"
 
    test_begin_subtest "Config list ($config)"
-   notmuch config list | notmuch_dir_sanitize | \
+   notmuch config list | notmuch_config_sanitize | \
        sed -e "s/^database.backup_dir=.*$/database.backup_dir/"  \
 	   -e "s/^database.hook_dir=.*$/database.hook_dir/" \
 	   -e "s/^database.path=.*$/database.path/"  \
@@ -274,9 +274,10 @@ EOF
 	   -e "s,^database.mail_root=CWD/home/env_points_here,database.mail_root=MAIL_DIR," \
 	   > OUTPUT
    cat <<EOF > EXPECTED
-built_with.compact=true
-built_with.field_processor=true
-built_with.retry_lock=true
+built_with.compact=something
+built_with.field_processor=something
+built_with.retry_lock=something
+built_with.sexpr_query=something
 database.autocommit=8000
 database.backup_dir
 database.hook_dir