From e4a21ab9165074353d265a183063333892ca2ccc Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Thu, 27 Apr 2017 15:38:59 +0200
Subject: initial commit

---
 .gitignore     |   3 ++
 Makefile       |  14 ++++++++
 aports-cache.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 126 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 aports-cache.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c7d0a36
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+aports-cache
+*.o
+.exrc
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f1f231a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,14 @@
+
+CC ?= gcc
+LD ?= gcc
+
+CFLAGS ?= -Werror -Wall -g -DDEBUG
+LDFLAGS ?= 
+
+aports-cache-objs := aports-cache.o
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(CFLAGS_$(notdir $@)) -c -o $@ $<
+
+aports-cache: aports-cache.o
+	$(CC) $(LDFLAGS) -o $@ $(LIBS_$(notdir $@)) $<
diff --git a/aports-cache.c b/aports-cache.c
new file mode 100644
index 0000000..b0dfdf0
--- /dev/null
+++ b/aports-cache.c
@@ -0,0 +1,109 @@
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#include <errno.h>
+#include <dirent.h>
+#include <err.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef DEBUG
+#define debug_printf(args...) fprintf(stderr, ## args)
+#else
+#define debug_printf(args...)
+#endif
+
+int is_newer(struct timespec a, struct timespec b)
+{
+	return (a.tv_sec == b.tv_sec) ?  a.tv_nsec > b.tv_nsec : a.tv_sec > b.tv_sec;
+}
+
+int cache_invalid(int dirfd, const char *filename)
+{
+	struct stat cache;
+	DIR *dir;
+	struct dirent *ent;
+	int r = 0;
+
+	if (fstatat(dirfd, filename, &cache, 0) == -1)
+		return 1;
+
+	dir = fdopendir(dirfd);
+	if (dir == NULL)
+		err(1, "fdopendir");
+	
+	while(1) {
+		char buf[PATH_MAX];
+		struct stat apkbuild;
+
+		errno = 0;
+		ent = readdir(dir);
+		if (ent == NULL) {
+			if (errno != 0)
+				err(1, "readdir");
+			break;
+		}
+
+		if (ent->d_name[0] == '.')
+			continue;
+
+		snprintf(buf, sizeof(buf), "%s/APKBUILD", ent->d_name);
+		if (fstatat(dirfd, buf, &apkbuild, 0) == -1) {
+			warn("%s", buf);
+			continue;
+		}
+
+		if (is_newer(apkbuild.st_mtim, cache.st_mtim)) {
+			debug_printf("%s\n", buf);
+			r = 1;
+			break;
+		}
+	}
+
+	closedir(dir);
+	return r;
+}
+
+int main(int argc, char *argv[])
+{
+	static struct option opts[] = {
+		{"verbose",	no_argument,	0, 'v' },
+		{"force",	no_argument,	0, 'f' },
+		{ 0, 0, 0, 0}
+	};
+	int i, c, verbose=0;
+	const char *cachefile = ".aports.cache.json";
+	char dirpath_buf[PATH_MAX];
+	char *dirpath = dirpath_buf;
+	int dirfd;
+
+	while ((c = getopt_long(argc, argv, "fv", opts, &i)) != -1) {
+		switch(c) {
+		case 'v':
+			verbose = 1;
+			break;
+		}
+	}
+	if (verbose)
+		printf("optind=%i, argc=%i\n", optind, argc);
+
+	if (optind < argc) {
+		dirpath = argv[optind];
+	} else {
+		dirpath = getcwd(dirpath_buf, sizeof(dirpath_buf));
+	}	
+	
+	dirfd = open(dirpath, O_DIRECTORY);
+	if (dirfd < 0)
+		err(1, "%s", dirpath);
+
+	if (cache_invalid(dirfd, cachefile))
+		printf("refresh\n");	
+
+	return 0;
+}
+
-- 
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