From 003e2b52ebc2bb2172e1b6a9e363e14a4a18a722 Mon Sep 17 00:00:00 2001
From: Tim Segers <tsegers@pm.me>
Date: Tue, 3 Jan 2023 15:01:42 +0100
Subject: Add --licenses option to print third-party licenses

---
 Makefile           | 10 +++++++++-
 src/opendeco-cli.c | 24 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 6ac73b0..00461f7 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,8 @@ OBJ_BIN = src/opendeco.o src/opendeco-cli.o src/opendeco-conf.o src/deco.o src/o
 OBJ_LIB = src/deco.o src/output.o src/schedule.o
 OBJ_TST = test/opendeco_test.o test/deco_test.o src/deco.o minunit/minunit.o
 
+LICENSES = minunit/LICENSE.h toml/LICENSE.h
+
 DEPS = $(shell find -type f -name "*.dep")
 
 all: opendeco opendeco_test libopendeco.a
@@ -45,15 +47,21 @@ opendeco_test: $(OBJ_TST)
 libopendeco.a: $(OBJ_LIB)
 	@ar rs libopendeco.a $(OBJ_LIB)
 
-%.o: %.c
+%.o: %.c # override the built-in default recipe
+%.o: %.c $(LICENSES)
 	@echo "  CC      $@"
 	@mkdir -p .dep/$(dir $@)
 	@$(CC) $(CFLAGS) -MD -MF .dep/$@.dep -o $@ -c $<
 
+%LICENSE.h: %LICENSE
+	@echo "  XXD     $@"
+	@xxd -i $< > $@
+
 clean:
 	rm -f $(OBJ_BIN)
 	rm -f $(OBJ_LIB)
 	rm -f $(OBJ_TST)
+	rm -f $(LICENSES)
 	rm -f opendeco
 	rm -f opendeco_test
 	rm -f libopendeco.a
diff --git a/src/opendeco-cli.c b/src/opendeco-cli.c
index 8fb0ebd..f9f510e 100644
--- a/src/opendeco-cli.c
+++ b/src/opendeco-cli.c
@@ -3,9 +3,22 @@
 #include <argp.h>
 #include <stdlib.h>
 #include <string.h>
+#include <wchar.h>
 
 #include "opendeco-cli.h"
 
+#include "toml/LICENSE.h"
+#include "minunit/LICENSE.h"
+
+#define print_xxd_arr(name, arrname)            \
+    do {                                        \
+        wprintf(L"--------\n\n");               \
+        wprintf(L"License for: %s\n\n", name);  \
+        for (int i = 0; i < arrname##_len; i++) \
+            putwchar(arrname[i]);               \
+        wprintf(L"\n");                         \
+    } while (0)
+
 static char args_doc[] = "";
 static char doc[] = "Implementation of Buhlmann ZH-L16 with Gradient Factors:"
                     "\vExamples:\n\n"
@@ -33,9 +46,17 @@ static struct argp_option options[] = {
     {"showtravel", 'T', 0,        0,                   "Show travel segments in deco plan",                               11},
 
     {0,            0,   0,        0,                   "Informational options:",                                          0 },
+    {"licenses",   -1,  0,        0,                   "Show third-party licenses",                                       0 },
     {0,            0,   0,        0,                   0,                                                                 0 }
 };
 
+static void print_licenses()
+{
+    wprintf(L"THIRD-PARTY LICENSES:\n\n");
+    print_xxd_arr("cktan/tomlc99", toml_LICENSE);
+    print_xxd_arr("siu/minunit", minunit_LICENSE);
+}
+
 static error_t parse_opt(int key, char *arg, struct argp_state *state)
 {
     struct arguments *arguments = state->input;
@@ -83,6 +104,9 @@ static error_t parse_opt(int key, char *arg, struct argp_state *state)
     case 'T':
         arguments->SHOW_TRAVEL = 1;
         break;
+    case -1:
+        print_licenses();
+        exit(ARGP_ERR_UNKNOWN);
     case ARGP_KEY_END:
         if (arguments->depth < 0 || arguments->time < 0) {
             argp_state_help(state, stderr, ARGP_HELP_USAGE);
-- 
cgit v1.2.3-70-g09d2