From 844cb56c8cb98c2b43c87d2e70cc47acedaad4bb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Markus=20Lindel=C3=B6w?= <markus@lindeloew.se>
Date: Mon, 6 Apr 2026 16:56:00 +0200
Subject: [PATCH] Add generate_version cmake target

---
 .github/workflows/ci.yml    |  9 +++++++
 CMakeLists.txt              | 12 ++++++++-
 cmake/GenerateVersion.cmake | 51 +++++++++++++++++++++++++++++++++++++
 include/tinycsocket.h       |  2 +-
 src/tinycsocket_internal.h  |  2 +-
 tools/check_version.sh      | 22 ++++++++++++++++
 6 files changed, 95 insertions(+), 3 deletions(-)
 create mode 100644 cmake/GenerateVersion.cmake
 create mode 100755 tools/check_version.sh

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bc967a8..6ddcb6f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -42,6 +42,15 @@ jobs:
       - name: Check header is up to date
         run: ./tools/is_header_up_to_date.sh
 
+  version-updated:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Check version is up to date
+        run: ./tools/check_version.sh
+
   posix-coverage:
     runs-on: ubuntu-latest
     steps:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca204fc..73e9a32 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.10)
 # CMake fix for crosscompile (MinGW-w64)
 set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY")
 
-project(tinycsocket VERSION 0.4)
+project(tinycsocket)
 
 include(CheckSymbolExists)
 include(CheckIncludeFile)
@@ -69,6 +69,15 @@ set(TINYCSOCKET_SRC
     "src/tinycsocket_posix.c"
 )
 
+# Version generation
+add_custom_target(
+    generate_version
+    COMMAND ${CMAKE_COMMAND} -DSRC_DIR=${CMAKE_CURRENT_SOURCE_DIR}
+        -P ${CMAKE_CURRENT_SOURCE_DIR}/cmake/GenerateVersion.cmake
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
+set_target_properties(generate_version PROPERTIES FOLDER tinycsocket)
+
 # Header generation
 add_custom_command(
     OUTPUT ${CMAKE_CURRENT_SOURCE_DIR}/include/tinycsocket.h
@@ -81,6 +90,7 @@ add_custom_command(
 add_custom_target(
     generate_header
     SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/include/tinycsocket.h
+    DEPENDS generate_version
 )
 set_target_properties(generate_header PROPERTIES FOLDER tinycsocket)
 
diff --git a/cmake/GenerateVersion.cmake b/cmake/GenerateVersion.cmake
new file mode 100644
index 0000000..9596454
--- /dev/null
+++ b/cmake/GenerateVersion.cmake
@@ -0,0 +1,51 @@
+# Generates TCS_VERSION_TXT from git tag + commit count.
+# Format: {tag}.{count}
+
+find_package(Git QUIET)
+if(NOT GIT_FOUND)
+    message(WARNING "Git not found, skipping version generation")
+    return()
+endif()
+
+# Get latest tag
+execute_process(
+    COMMAND "${GIT_EXECUTABLE}" describe --tags --abbrev=0
+    WORKING_DIRECTORY "${SRC_DIR}"
+    RESULT_VARIABLE res
+    OUTPUT_VARIABLE tag
+    ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+if(NOT res EQUAL 0)
+    message(WARNING "No git tags found, skipping version generation")
+    return()
+endif()
+
+# Count commits since tag
+execute_process(
+    COMMAND "${GIT_EXECUTABLE}" rev-list --count "${tag}..HEAD"
+    WORKING_DIRECTORY "${SRC_DIR}"
+    RESULT_VARIABLE res
+    OUTPUT_VARIABLE count
+    ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
+
+if(NOT res EQUAL 0)
+    set(count "0")
+endif()
+
+set(version "${tag}.${count}")
+
+# Update header
+set(HEADER_FILE "${SRC_DIR}/src/tinycsocket_internal.h")
+file(READ "${HEADER_FILE}" content)
+
+string(REGEX REPLACE
+    "(static const char\\* const TCS_VERSION_TXT = \")[^\"]*(\")"
+    "\\1${version}\\2"
+    new_content "${content}")
+
+if(NOT "${content}" STREQUAL "${new_content}")
+    file(WRITE "${HEADER_FILE}" "${new_content}")
+    message(STATUS "Updated TCS_VERSION_TXT to \"${version}\"")
+else()
+    message(STATUS "TCS_VERSION_TXT already \"${version}\"")
+endif()
diff --git a/include/tinycsocket.h b/include/tinycsocket.h
index 228075e..99b875b 100644
--- a/include/tinycsocket.h
+++ b/include/tinycsocket.h
@@ -35,7 +35,7 @@
 
 #define tcs_static_assert(name, expr) typedef char tcs_sa_##name[(expr) ? 1 : -1]
 
-static const char* const TCS_VERSION_TXT = "v0.4-dev";
+static const char* const TCS_VERSION_TXT = "v0.3.175";
 static const char* const TCS_LICENSE_TXT =
     "Copyright 2018 Markus Lindelöw\n"
     "\n"
diff --git a/src/tinycsocket_internal.h b/src/tinycsocket_internal.h
index 50cc582..ef10bec 100644
--- a/src/tinycsocket_internal.h
+++ b/src/tinycsocket_internal.h
@@ -29,7 +29,7 @@
 
 #define tcs_static_assert(name, expr) typedef char tcs_sa_##name[(expr) ? 1 : -1]
 
-static const char* const TCS_VERSION_TXT = "v0.4-dev";
+static const char* const TCS_VERSION_TXT = "v0.3.175";
 static const char* const TCS_LICENSE_TXT =
     "Copyright 2018 Markus Lindelöw\n"
     "\n"
diff --git a/tools/check_version.sh b/tools/check_version.sh
new file mode 100755
index 0000000..a3b0dcb
--- /dev/null
+++ b/tools/check_version.sh
@@ -0,0 +1,22 @@
+#!/bin/sh
+# Verifies that TCS_VERSION_TXT matches what generate_version would produce.
+# Returns 0 if up to date.
+set -e
+
+PROJPATH="$(dirname "$(readlink -f "$0")")"/..
+
+# Get expected version
+TAG=$(git -C "$PROJPATH" describe --tags --abbrev=0)
+COUNT=$(git -C "$PROJPATH" rev-list --count "$TAG..HEAD")
+EXPECTED="${TAG}.${COUNT}"
+
+# Get actual version from header
+ACTUAL=$(grep 'TCS_VERSION_TXT' "$PROJPATH/src/tinycsocket_internal.h" | sed 's/.*"\(.*\)".*/\1/')
+
+if [ "$EXPECTED" != "$ACTUAL" ]; then
+    echo "Version mismatch: header has \"$ACTUAL\", expected \"$EXPECTED\""
+    echo "Run: cmake --build . --target generate_version"
+    exit 1
+fi
+
+echo "Version OK: $ACTUAL"