Pin libxsql to v1.0.21 instead of tracking main

This series needs libxsql 1.0.21 (exact_int64 / exact_text /
Int64KeyRange). All three build paths fetched libxsql main, so a later
libxsql change could break a build of this exact source. CMake's
GIT_TAG, the meson wrap's revision and the Makefile's clone now name the
release tag; bump them together.

CMakeLists.txt

@@ -105,7 +105,7 @@ else()
   message(STATUS "r2xsql: fetching libxsql from GitHub")
   FetchContent_Declare(libxsql
     GIT_REPOSITORY https://github.com/0xeb/libxsql.git
-    GIT_TAG        main
+    GIT_TAG        v1.0.21  # needs 1.0.21: exact_int64 / exact_text / Int64KeyRange
     GIT_SHALLOW    TRUE)
   FetchContent_MakeAvailable(libxsql)
 endif()

Makefile

@@ -35,6 +35,7 @@ BUILD=build-make
 # --- libxsql: sibling checkout by default, else fetched into build-make/ ------
 LIBXSQL_DIR?=../libxsql
 LIBXSQL_URL?=https://github.com/0xeb/libxsql.git
+LIBXSQL_REF?=v1.0.21
 ifeq ($(wildcard $(LIBXSQL_DIR)/CMakeLists.txt),)
   LIBXSQL_DIR:=$(BUILD)/libxsql
 endif
@@ -52,8 +53,8 @@ R2XSQL_INC=-I$(CWD)/src/lib/include -I$(CWD)/src/lib/src -I$(CWD)/src
 # --- defines ------------------------------------------------------------------
 # R2XSQL_HAVE_LIBR=1  -> compile the in-process libr backend (real, not stub).
 # XSQL_VERSION_STRING -> libxsql's --version string. Derived from libxsql's own
-# CMakeLists at build time so it always follows whatever libxsql main is at —
-# no pinned value here (r2xsql tracks libxsql main). Override with
+# CMakeLists at build time, so it follows the libxsql checkout in use (the
+# pinned LIBXSQL_REF when fetched). Override with
 # `make XSQL_VERSION=x` only if you must.
 # (pattern has no '(' on purpose: an unbalanced paren inside $(shell ...) makes
 # GNU make read it as an unterminated call.)
@@ -91,7 +92,7 @@ all: $(PLUGIN)
 # libxsql fetch (only if the sibling is absent and we redirected into build-make)
 $(LIBXSQL_DIR)/CMakeLists.txt:
 	@echo "libxsql not found at ../libxsql -- cloning $(LIBXSQL_URL)"
-	git clone --depth 1 $(LIBXSQL_URL) $(LIBXSQL_DIR)
+	git clone --depth 1 --branch $(LIBXSQL_REF) $(LIBXSQL_URL) $(LIBXSQL_DIR)
 
 $(BUILD)/libxsql.mk: $(LIBXSQL_DIR)/CMakeLists.txt
 	@mkdir -p $(dir $@)

subprojects/libxsql.wrap

@@ -7,7 +7,7 @@
 # preference to the wrap. Otherwise this fetches the same source CMake does.
 [wrap-git]
 url = https://github.com/0xeb/libxsql.git
-revision = main
+revision = v1.0.21
 depth = 1
 patch_directory = libxsql
 

subprojects/packagefiles/libxsql/meson.build

@@ -8,7 +8,7 @@ project('libxsql', ['c', 'cpp'],
   default_options: ['cpp_std=c++17'])
 
 # Derive libxsql's version from its own CMakeLists so the --version banner
-# always follows whatever libxsql main is at — no pinned value here.
+# follows the libxsql checkout in use (the wrap's pinned revision when fetched).
 fs = import('fs')
 libxsql_ver = 'unknown'
 foreach line : fs.read('CMakeLists.txt').split('\n')