Add `--version` flag to show current compiler version's git commit date

and hash

4 files changed, 20 insertions, 6 deletions

diff --git a/Makefile b/Makefile
index 35e5fd2f..b498cfbe 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,6 @@ else
 
 include config.mk
 
-VERSION=0.0.1
 CC=cc
 CCONFIG=-std=c2x -fPIC \
 		-fno-signed-zeros -fno-finite-math-only -fno-trapping-math \
@@ -50,8 +49,10 @@ OSFLAGS != case $(OS) in *BSD|Darwin) echo '-D_BSD_SOURCE';; Linux) echo '-D_GNU
 EXTRA=
 G=-ggdb
 O=-O3
+GIT_VERSION=$(shell git log -1 --pretty=format:'%as_%h')
 CFLAGS=$(CCONFIG) $(INCLUDE_DIRS) $(EXTRA) $(CWARN) $(G) $(O) $(OSFLAGS) $(LTO) \
-	   -DTOMO_HOME='"$(TOMO_HOME)"' -DTOMO_PREFIX='"$(PREFIX)"' -DDEFAULT_C_COMPILER='"$(DEFAULT_C_COMPILER)"'
+	   -DTOMO_HOME='"$(TOMO_HOME)"' -DTOMO_PREFIX='"$(PREFIX)"' -DDEFAULT_C_COMPILER='"$(DEFAULT_C_COMPILER)"' \
+	   -DTOMO_VERSION='"$(GIT_VERSION)"'
 CFLAGS_PLACEHOLDER="$$(printf '\033[2m<flags...>\033[m\n')" 
 LDLIBS=-lgc -lcord -lm -lunistring -lgmp
 LIBTOMO_FLAGS=-shared
@@ -143,9 +144,12 @@ api/api.md: $(API_YAML)
 api-docs: $(API_MD) api/api.md
 
 .PHONY: manpages
-manpages: $(API_YAML)
+manpages: $(API_YAML) man/man1/tomo.1
 	./scripts/mandoc_gen.py $^
 
+man/man1/tomo.1: docs/tomo.1.md
+	pandoc --lua-filter=docs/.pandoc/bold-code.lua -s $< -t man -o $@
+
 examples:
 	./build/bin/tomo -qIL examples/log examples/ini examples/vectors examples/http examples/wrap examples/colorful
 	./build/bin/tomo -e examples/game/game.tm examples/http-server/http-server.tm \
diff --git a/docs/tomo.1.md b/docs/tomo.1.md
index 694eacf9..29d9414f 100644
--- a/docs/tomo.1.md
+++ b/docs/tomo.1.md
@@ -62,6 +62,9 @@ C code, which is then compiled using a C compiler of your choice.
 `-v`, `--verbose`
 : Print extra verbose output.
 
+`--version`
+: Print the compiler version and exit.
+
 `-r`, `--run`
 : Run an installed tomo program from `~/.local/share/tomo/installed`.
 
diff --git a/man/man1/tomo.1 b/man/man1/tomo.1
index bbc90f8e..37252921 100644
--- a/man/man1/tomo.1
+++ b/man/man1/tomo.1
@@ -5,9 +5,6 @@
 tomo \- The programming language of tomorrow.
 .SH SYNOPSIS
 .TP
-Run the REPL:
-\f[B]tomo\f[R]
-.TP
 Run a program:
 \f[B]tomo\f[R] \f[I]program.tm\f[R] [[\f[B]\-\-\f[R]]
 \f[I]args\&...\f[R]]
@@ -63,6 +60,9 @@ Set the optimization level.
 \f[B]\-v\f[R], \f[B]\-\-verbose\f[R]
 Print extra verbose output.
 .TP
+\f[B]\-\-version\f[R]
+Print the compiler version and exit.
+.TP
 \f[B]\-r\f[R], \f[B]\-\-run\f[R]
 Run an installed tomo program from
 \f[B]\[ti]/.local/share/tomo/installed\f[R].
diff --git a/src/tomo.c b/src/tomo.c
index 9f273ab3..f0b4cfca 100644
--- a/src/tomo.c
+++ b/src/tomo.c
@@ -54,6 +54,7 @@ static OptionalList_t files = NONE_LIST,
                        uninstall = NONE_LIST,
                        libraries = NONE_LIST;
 static OptionalBool_t verbose = false,
+                      show_version = false,
                       quiet = false,
                       show_parse_tree = false,
                       stop_at_transpile = false,
@@ -163,6 +164,7 @@ int main(int argc, char *argv[])
         {"args", true, List$info(&Text$info), &args},
         {"verbose", false, &Bool$info, &verbose},
         {"v", false, &Bool$info, &verbose},
+        {"version", false, &Bool$info, &show_version},
         {"parse", false, &Bool$info, &show_parse_tree},
         {"p", false, &Bool$info, &show_parse_tree},
         {"quiet", false, &Bool$info, &quiet},
@@ -190,6 +192,11 @@ int main(int argc, char *argv[])
         {"m", false, &Bool$info, &source_mapping},
     );
 
+    if (show_version) {
+        print("Tomo version: ", TOMO_VERSION);
+        return 0;
+    }
+
     bool is_gcc = (system(String(cc, " -v 2>&1 | grep 'gcc version' >/dev/null")) == 0);
     if (is_gcc) {
         cflags = Texts(cflags, Text(" -fsanitize=signed-integer-overflow -fno-sanitize-recover"