Merge pull request 'feat(version): added support for building version information' (#2) from gfaraday/bbs:main into main

Reviewed-on: #2

.gitignore

@@ -1,2 +1,5 @@
 bbs
 build/
+
+# Machine generated files:
+src/version.c

Makefile

@@ -3,7 +3,10 @@
 # Makefile for Amber's BBS Interface
 # Buildsys by Gale Faraday
 
-.PHONY: all clean run
+# `generate` must be called before `all` to build version information and other
+# machine generated files.
+
+.PHONY: all clean run generate
 .SUFFIXES:
 
 .DEFAULT_GOAL := all
@@ -11,6 +14,7 @@
 TARGET     := $(shell basename $(CURDIR))
 SOURCES    := src/
 BUILD      := build/
+GENABLES   := $(SOURCES)version.c
 OBJS       := $(patsubst $(SOURCES)%.c,$(BUILD)%.o,$(wildcard $(SOURCES)*.c))
 EXECUTABLE := $(TARGET)
 
@@ -27,7 +31,12 @@ run: $(EXECUTABLE)
 
 .IGNORE: clean
 clean:
-	@rm -rvf $(BUILD) $(EXECUTABLE)
+	@rm -rvf $(BUILD) $(EXECUTABLE) $(GENABLES)
+
+generate: $(GENABLES)
+
+$(GENABLES): genver.sh
+	./genver.sh
 
 $(EXECUTABLE): $(OBJS)
 	$(LD) $(LDFLAGS) -o $@ $^

genver.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+# Script to generate version information file
+
+# Current git tag
+TAG="$(git describe --always --dirty --tags)"
+
+# Output filename
+OUTFILE='src/version.c'
+
+sed -e "s/<HASH>/$TAG/g" <<EOF > "$OUTFILE"
+/* Build version information. This file generated by genver.sh */
+
+const char GIT_HASH[] = "<HASH>";
+const char CC_VERSION[] = __VERSION__;
+const char BUILD_DATE[] = __DATE__;
+EOF

src/version.h

@@ -0,0 +1,5 @@
+/* Header for version information constants */
+
+extern const char GIT_HASH[];
+extern const char CC_VERSION[];
+extern const char BUILD_DATE[];