initial

Makefile

@@ -0,0 +1,27 @@
+VERSION := $(shell git rev-parse --short HEAD)
+BUILDTIME := $(shell date -u '+%Y-%m-%dT%H:%M:%SZ')
+BUILDUSER := $(shell whoami)
+BUILDHOST := $(shell hostname -s)
+BUILDARCH := $(shell uname -m)
+
+GOLDFLAGS += -X main.Version=$(VERSION)
+GOLDFLAGS += -X main.Buildtime=$(BUILDTIME)
+GOLDFLAGS += -X main.Builduser=$(BUILDUSER)@$(BUILDHOST)
+GOLDFLAGS += -X main.Buildarch=$(BUILDARCH)
+GOFLAGS = -ldflags "$(GOLDFLAGS)"
+
+default: rundebug
+
+rundebug: build
+	DEBUG=1 ./xsum
+
+run: build
+	./xsum
+
+build: ./xsum
+
+./xsum: *.go */*.go
+	go build -o $@ $(GOFLAGS) .
+
+fmt:
+	go fmt *.go

README.md

@@ -0,0 +1,9 @@
+# xsum
+
+this stores a file mtime and cryptographically secure content checksum
+in an xattr, so that you can verify that your files aren't corrupted
+on filesystems that are dumb and don't include data checksums (e.g. apfs)
+
+# author
+
+sneak <sneak@sneak.berlin>