refactor: Generate version.h from VERSION

Fixes #8

.gitignore

@@ -16,3 +16,6 @@ valgrind.log
 
 # Simple test input for README demo
 my_input
+
+# Generated sources and headers
+include/version.h

Makefile

@@ -26,7 +26,9 @@ DEP = $(SRC:.c=.d)
 
 MANP = docs/metang.1
 
-.PHONY: default all debug release install clean
+VERSION_H = include/version.h
+
+.PHONY: default all debug release install clean version
 
 default: all
 
@@ -48,11 +50,16 @@ install: release
 uninstall:
 	rm -rf $(BINDEST)/$(TARGET) $(MANDEST)/$(MANP)
 
-$(TARGET): $(OBJ)
+version: $(VERSION_H)
+
+$(VERSION_H): VERSION
+	./tools/version.sh $< $@
+
+$(TARGET): $(VERSION_H) $(OBJ)
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $(TARGET) $(OBJ)
 
 clean:
-	$(RM) $(TARGET) $(OBJ) $(DEP)
+	$(RM) $(TARGET) $(OBJ) $(DEP) $(VERSION_H)
 
 include Makefile.dev-tools
 

VERSION

@@ -0,0 +1 @@
+0.1.1

include/meson.build

@@ -1 +1,11 @@
 public_includes = include_directories('.')
+
+gen_version_h = custom_target(
+    'version.h',
+    output: 'version.h',
+    command: [
+        metang_version,
+        version,
+        '@OUTPUT@',
+    ],
+)

meson.build

@@ -18,7 +18,7 @@ project(
     license: 'Apache-2.0',
     license_files: 'LICENSE',
     meson_version: '>=1.5.0',
-    version: '0.1.0',
+    version: run_command(['./tools/version.sh', 'VERSION'], check: true).stdout().strip(),
     default_options: {
         'buildtype': 'release', # O3
         'warning_level': '3', # all, extra, pedantic
@@ -28,6 +28,7 @@ project(
 
 native = get_option('native')
 install = native and meson.is_cross_build() ? false : true
+version = files('VERSION')
 
 # This must come before `tests`!
 subdir('tools')
@@ -38,7 +39,10 @@ subdir('tests')
 
 metang_exe = executable(
     'metang',
-    c_sources,
+    sources: [
+        static_sources,
+        gen_version_h,
+    ],
     include_directories: public_includes,
     install: install,
     install_mode: 'rwxr-xr-x',

src/meson.build

@@ -1,4 +1,4 @@
-c_sources = files(
+static_sources = files(
     'deque.c',
     'generate.c',
     'metang.c',

src/metang.c

@@ -28,9 +28,10 @@
 #include "deque.h"
 #include "generate.h"
 #include "strlib.h"
+#include "version.h"
 
 // clang-format off
-static const char *version = "0.1.0";
+static const char *version = METANG_VERSION;
 
 static const char *tag_line = "metang - Generate multi-purpose C headers for enumerators";
 

tools/meson.build

@@ -1 +1,2 @@
 metang_runtests = find_program('runtests.py', native: true)
+metang_version = find_program('version.sh', native: true)

tools/version.sh

@@ -0,0 +1,29 @@
+#!/usr/bin/env bash
+
+if [[ "$#" -eq 0 ]]; then
+    echo "Usage: ./version.sh VERSION_FILE [INCLUDE_DEST]"
+    echo ""
+    echo "If INCLUDE_DEST is not given, then the contents of VERSION_FILE"
+    echo "will be written to standard output."
+    exit 1
+fi
+
+VERSION_FILE=$1
+INCLUDE_DEST=$2
+
+VERSION=$(cat "${VERSION_FILE}")
+
+if [[ -n "$INCLUDE_DEST" ]]; then
+    {
+        echo "/* THIS FILE IS GENERATED; DO NOT MODIFY!!! */"
+        echo
+        echo "#ifndef METANG_VERSION_H"
+        echo "#define METANG_VERSION_H"
+        echo
+        echo "#define METANG_VERSION \"${VERSION}\""
+        echo
+        echo "#endif /* METANG_VERSION_H */"
+    } >"${INCLUDE_DEST}"
+else
+    echo "${VERSION}"
+fi