1 files changed, 147 insertions, 0 deletions
diff --git a/make.c b/make.c
new file mode 100644
index 0000000..08c883d
--- /dev/null
+++ b/make.c
@@ -0,0 +1,147 @@
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "cbs.h"
+
+#define CC     "cc"
+#define CFLAGS "-pipe", "-O3", "-march=native", "-mtune=native"
+#define DFLAGS "-DGRAB_DEBUG", "-g", "-ggdb3"
+#define WFLAGS "-Wall", "-Wextra", "-Werror", "-Wpedantic"
+#define PREFIX "/usr/local"
+
+#define streq(a, b) (!strcmp(a, b))
+#define cmdprc(c) \
+	do { \
+		int ec; \
+		cmdput(c); \
+		if ((ec = cmdexec(c)) != EXIT_SUCCESS) \
+			diex("%s terminated with exit-code %d", *c._argv, ec); \
+		cmdclr(&c); \
+	} while (0)
+
+static size_t _strlcat(char *, const char *, size_t);
+static char *_mkoutpath(const char **, size_t);
+#define mkoutpath(...) \
+	_mkoutpath((const char **)_vtoa(__VA_ARGS__), lengthof(_vtoa(__VA_ARGS__)))
+
+int
+main(int argc, char **argv)
+{
+	int opt;
+	bool debug;
+	cmd_t c = {0};
+
+	cbsinit(argc, argv);
+	rebuild();
+
+	while ((opt = getopt(argc, argv, "d")) != -1) {
+		switch (opt) {
+		case 'd':
+			debug = true;
+			break;
+		default:
+			fputs("Usage: make [-d]\n", stderr);
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	argc -= optind;
+	argv += optind;
+
+	if (argc > 0) {
+		if (streq(*argv, "clean")) {
+			cmdadd(&c, "rm", "-f", "grab");
+			cmdprc(c);
+		} else if (streq(*argv, "install")) {
+			char *bin, *man;
+			bin = mkoutpath("/bin");
+			man = mkoutpath("/share/man/man1");
+			cmdadd(&c, "mkdir", "-p", bin, man);
+			cmdprc(c);
+			cmdadd(&c, "cp", "grab", bin);
+			cmdprc(c);
+			cmdadd(&c, "cp", "grab.1", man);
+			cmdprc(c);
+		}
+	} else {
+		if (foutdated("grab", "grab.c")) {
+			cmdadd(&c, CC, WFLAGS);
+			if (debug)
+				cmdadd(&c, DFLAGS);
+			else
+				cmdadd(&c, CFLAGS);
+			cmdadd(&c, "-o", "grab", "grab.c");
+			cmdprc(c);
+		}
+	}
+
+	return EXIT_SUCCESS;
+}
+
+char *
+_mkoutpath(const char **xs, size_t n)
+{
+#define trycat(s) \
+	do { \
+		if (_strlcat(buf, (s), PATH_MAX) >= PATH_MAX) \
+			goto toolong; \
+	} while (0)
+
+	char *p, *buf;
+
+	buf = bufalloc(NULL, PATH_MAX, sizeof(char));
+	buf[0] = 0;
+
+	if (p = getenv("DESTDIR"), p && *p)
+		trycat(p);
+
+	p = getenv("PREFIX");
+	trycat(p && *p ? p : PREFIX);
+
+	for (size_t i = 0; i < n; i++)
+		trycat(xs[i]);
+
+	return buf;
+
+toolong:
+	errno = ENAMETOOLONG;
+	die(__func__);
+}
+
+size_t
+_strlcat(char *dst, const char *src, size_t size)
+{
+	char *d = dst;
+	const char *s = src;
+	size_t n = size;
+	size_t dlen;
+
+	while (n-- != 0 && *d != '\0')
+		d++;
+
+	dlen = d - dst;
+	n = size - dlen;
+
+	if (n == 0) {
+		while (*s++)
+			;
+		return dlen + (s - src - 1);
+	}
+
+	while (*s != '\0') {
+		if (n != 1) {
+			*d++ = *s;
+			n--;
+		}
+		s++;
+	}
+
+	*d = '\0';
+
+	return dlen + (s - src);
+}