next (#5)

Co-authored-by: sneak <sneak@sneak.berlin> Reviewed-on: #5
12 months ago · 7df558d8d0
parent 7a8a1b4a4a
commit 7df558d8d0
29 changed files with 906 additions and 203 deletions
--- a/.dockerignore
+++ b/.dockerignore
@ -0,0 +1,3 @@
+*.tmp
+*.dockerimage
+.git
--- a/.drone.yml
+++ b/.drone.yml
@ -7,8 +7,17 @@ steps:
  network_mode: bridge
  settings:
    repo: sneak/mfer
+    build_args_from_env: [ DRONE_COMMIT_SHA ]
    dry_run: true
    custom_dns: [ 116.202.204.30 ]
    tags:
-      - ${DRONE_COMMIT_SHA}
+      - ${DRONE_COMMIT_SHA:0:7}
      - ${DRONE_BRANCH}
+      - latest
+- name: notify
+  image: plugins/slack
+  settings:
+    webhook:
+      from_secret: SLACK_WEBHOOK_URL
+  when:
+    event: pull_request
--- a/.gitignore
+++ b/.gitignore
@ -1,2 +1,6 @@
 mfer/*.pb.go
 /mfer.cmd
+/tmp
+*.tmp
+*.dockerimage
+/vendor
--- a/.golangci.yml
+++ b/.golangci.yml
@ -0,0 +1,2 @@
+run:
+    tests: false
--- a/71
+++ b/71
@ -1,42 +1,37 @@
-## lint image
-## current as of 2022-01-25
-FROM golangci/golangci-lint:latest AS linter
-
-RUN mkdir -p /build
-WORKDIR /build
-COPY ./ ./
-RUN golangci-lint run
-
-## build image:
-# this is golang:1.17.6-buster as of 2022-01-27
-FROM golang@sha256:52a48e0239f4d645b20ac268a60361703afe7feb2df5697fa89f72052cb87a3e AS builder
-#FROM golang:1.16-buster AS builder
-
+################################################################################
+#2345678911234567892123456789312345678941234567895123456789612345678971234567898
+################################################################################
+FROM sneak/builder:2022-12-08 AS builder
 ENV DEBIAN_FRONTEND noninteractive
-RUN apt update && apt install -y make bzip2 curl unzip
-
-# install newer protoc than what comes with buster
-ENV PB_REL https://github.com/protocolbuffers/protobuf/releases
-RUN curl -LO $PB_REL/download/v3.19.0/protoc-3.19.0-linux-x86_64.zip && \
-    unzip protoc-3.19.0-linux-x86_64.zip -d /usr/local
-
-RUN mkdir -p /build
 WORKDIR /build
-
-COPY go.mod .
-COPY go.sum .
-
-COPY ./ ./
-# don't lint again during build because there's no golangci-lint in this
-# image and we already did it in a previous stage
-#RUN make lint
-RUN make mfer
-#RUN go mod vendor
-RUN tar -c . | bzip2 > /src.tbz2
-
-
+COPY ./Makefile ./.golangci.yml ./go.mod ./go.sum /build/
+COPY ./vendor.tzst /build/vendor.tzst
+COPY ./modcache.tzst /build/modcache.tzst
+COPY ./internal ./internal
+COPY ./bin/gitrev.sh ./bin/gitrev.sh
+COPY ./mfer ./mfer
+COPY ./cmd ./cmd
+ARG GITREV unknown
+ARG DRONE_COMMIT_SHA unknown
+
+RUN mkdir -p "$(go env GOMODCACHE)" && cd "$(go env GOMODCACHE)" && \
+    zstdmt -d --stdout /build/modcache.tzst | tar xf - && \
+    rm /build/modcache.tzst && cd /build
+RUN \
+    cd mfer && go generate . && cd .. && \
+    GOPACKAGESDEBUG=true golangci-lint run ./... && \
+    mkdir vendor && cd vendor && \
+    zstdmt -d --stdout /build/vendor.tzst | tar xf - && rm /build/vendor.tzst && \
+    cd .. && \
+    make mfer.cmd
+RUN rm -rf /build/vendor && go mod vendor && tar -c . | zstdmt -19 > /src.tzst
+################################################################################
+#2345678911234567892123456789312345678941234567895123456789612345678971234567898
+################################################################################
+## final image
+################################################################################
 FROM scratch
-COPY --from=builder /src.tbz2 /src.tbz2
-COPY --from=builder /build/mfer /mfer
+# we put all the source into the final image for posterity, it's small
+COPY --from=builder /src.tzst /src.tzst
+COPY --from=builder /build/mfer.cmd /mfer
 ENTRYPOINT ["/mfer"]
-
--- a/64
+++ b/64
@ -1,40 +1,52 @@
-
+export DOCKER_BUILDKIT := 1
+export PROGRESS_NO_TRUNC := 1
 GOPATH := $(shell go env GOPATH)
 export PATH := $(PATH):$(GOPATH)/bin
 PROTOC_GEN_GO := $(GOPATH)/bin/protoc-gen-go
-
+SOURCEFILES := mfer/*.go mfer/*.proto internal/*/*.go cmd/*/*.go go.mod go.sum
 ARCH := $(shell uname -m)
-GITREV := $(shell git describe --always --dirty=-dirty)
-
-GOLDFLAGS += -X main.Version=0.1.0
-GOLDFLAGS += -X main.Gitrev=$(GITREV)
+GITREV_BUILD := $(shell bash $(PWD)/bin/gitrev.sh)
+APPNAME := mfer
+VERSION := 0.1.0
+export DOCKER_IMAGE_CACHE_DIR := $(HOME)/Library/Caches/Docker/$(APPNAME)-$(ARCH)
+GOLDFLAGS += -X main.Version=$(VERSION)
+GOLDFLAGS += -X main.Gitrev=$(GITREV_BUILD)
 GOFLAGS := -ldflags "$(GOLDFLAGS)"

-default: run
+.PHONY: docker default run ci test fixme
+
+default: fmt test

 run: ./mfer.cmd
 	./$<
 	./$< gen --ignore-dotfiles

+ci: test
+
+test: $(SOURCEFILES) mfer/mf.pb.go
+	go test -v --timeout 3s ./...
+
 $(PROTOC_GEN_GO):
-	test -e $(PROTOC_GEN_GO) || go install -v google.golang.org/protobuf/cmd/protoc-gen-go@latest
+	test -e $(PROTOC_GEN_GO) || go install -v google.golang.org/protobuf/cmd/protoc-gen-go@v1.28.1

 fixme:
 	@grep -nir fixme . | grep -v Makefile

 devprereqs:
 	which gofumpt || go install -v mvdan.cc/gofumpt@latest
-	which golangci-lint || go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@latest
+	which golangci-lint || go install -v github.com/golangci/golangci-lint/cmd/golangci-lint@v1.50.1

-mfer.cmd: $(PROTOC_GEN_GO) mfer/*.go internal/*/*.go cmd/*/*.go
-	protoc --version
+mfer/mf.pb.go: mfer/mf.proto
 	cd mfer && go generate .
+
+mfer.cmd: $(SOURCEFILES) mfer/mf.pb.go
+	protoc --version
 	cd cmd/mfer && go build -tags urfave_cli_no_docs -o ../../mfer.cmd $(GOFLAGS) .

 clean:
-	rm -rfv mfer/*.pb.go mfer.cmd cmd/mfer/mfer
+	rm -rfv mfer/*.pb.go mfer.cmd cmd/mfer/mfer *.dockerimage

-fmt: devprereqs
+fmt: mfer/mf.pb.go
 	gofumpt -l -w mfer internal cmd
 	golangci-lint run --fix
 	-prettier -w *.json
@ -44,5 +56,27 @@ lint:
 	golangci-lint run
 	sh -c 'test -z "$$(gofmt -l .)"'

-dockerbuild:
-	docker build .
+docker: sneak-mfer.$(ARCH).tzst.dockerimage
+
+sneak-mfer.$(ARCH).tzst.dockerimage: $(SOURCEFILES) vendor.tzst modcache.tzst
+	docker build --progress plain --build-arg GITREV=$(GITREV_BUILD) -t sneak/mfer .
+	docker save sneak/mfer | pv | zstdmt -19 > $@
+	du -sh $@
+
+godoc:
+	open http://127.0.0.1:6060
+	godoc -http=:6060
+
+vendor.tzst: go.mod go.sum
+	go mod tidy
+	go mod vendor
+	cd vendor && tar -c . | pv | zstdmt -19 > $(PWD)/$@.tmp
+	rm -rf vendor
+	mv $@.tmp $@
+
+modcache.tzst: go.mod go.sum
+	go mod tidy
+	cd $(HOME)/go/pkg && chmod -R u+rw . && rm -rf mod sumdb
+	go mod download -x
+	cd $(shell go env GOMODCACHE) && tar -c . | pv | zstdmt -19 > $(PWD)/$@.tmp
+	mv $@.tmp $@
--- a/bin/gitrev.sh
+++ b/bin/gitrev.sh
@ -0,0 +1,12 @@
+#!/bin/bash
+#
+if [[ ! -z "$DRONE_COMMIT_SHA" ]]; then
+    echo "${DRONE_COMMIT_SHA:0:7}"
+    exit 0
+fi
+
+if [[ ! -z "$GITREV" ]]; then
+    echo $GITREV
+else
+    git describe --always --dirty=-dirty
+fi
--- a/cmd/mfer/main_test.go
+++ b/cmd/mfer/main_test.go
@ -0,0 +1,11 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuild(t *testing.T) {
+	assert.True(t, true)
+}
--- a/go.mod
+++ b/go.mod
@ -1,12 +1,34 @@
 module git.eeqj.de/sneak/mfer

-go 1.16
+go 1.17

 require (
+	github.com/apex/log v1.9.0
 	github.com/davecgh/go-spew v1.1.1
 	github.com/pterm/pterm v0.12.35
 	github.com/spf13/afero v1.8.0
-	github.com/urfave/cli/v2 v2.3.0
-	github.com/visionmedia/go-cli-log v0.0.0-20151214173634-914d1b040b20 // indirect
-	google.golang.org/protobuf v1.27.1
+	github.com/stretchr/testify v1.8.1
+	github.com/urfave/cli/v2 v2.23.6
+	google.golang.org/protobuf v1.28.1
+
+)
+
+require (
+	github.com/atomicgo/cursor v0.0.1 // indirect
+	github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect
+	github.com/fatih/color v1.7.0 // indirect
+	github.com/gookit/color v1.4.2 // indirect
+	github.com/mattn/go-colorable v0.1.2 // indirect
+	github.com/mattn/go-isatty v0.0.8 // indirect
+	github.com/mattn/go-runewidth v0.0.13 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/rivo/uniseg v0.2.0 // indirect
+	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/xo/terminfo v0.0.0-20210125001918-ca9a967f8778 // indirect
+	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
+	golang.org/x/sys v0.0.0-20211013075003-97ac67df715c // indirect
+	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	golang.org/x/text v0.3.4 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )
--- a/go.sum
+++ b/go.sum
@ -37,6 +37,7 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/toml v1.2.1/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/MarvinJWendt/testza v0.1.0/go.mod h1:7AxNvlfeHP7Z/hDQ5JtE3OKYT3XFUeLCDE2DQninSqs=
 github.com/MarvinJWendt/testza v0.2.1/go.mod h1:God7bhG8n6uQxwdScay+gjm9/LnO4D3kkcZX4hv9Rp8=
@ -44,8 +45,15 @@ github.com/MarvinJWendt/testza v0.2.8/go.mod h1:nwIcjmr0Zz+Rcwfh3/4UhBp7ePKVhuBE
 github.com/MarvinJWendt/testza v0.2.10/go.mod h1:pd+VWsoGUiFtq+hRKSU1Bktnn+DMCSrDrXDpX2bG66k=
 github.com/MarvinJWendt/testza v0.2.12 h1:/PRp/BF+27t2ZxynTiqj0nyND5PbOtfJS0SuTuxmgeg=
 github.com/MarvinJWendt/testza v0.2.12/go.mod h1:JOIegYyV7rX+7VZ9r77L/eH6CfJHHzXjB69adAhzZkI=
+github.com/apex/log v1.9.0 h1:FHtw/xuaM8AgmvDDTI9fiwoAL25Sq2cxojnZICUU8l0=
+github.com/apex/log v1.9.0/go.mod h1:m82fZlWIuiWzWP04XCTXmnX0xRkYYbCdYn8jbJeLBEA=
+github.com/apex/logs v1.0.0/go.mod h1:XzxuLZ5myVHDy9SAmYpamKKRNApGj54PfYLcFrXqDwo=
+github.com/aphistic/golf v0.0.0-20180712155816-02c07f170c5a/go.mod h1:3NqKYiepwy8kCu4PNA+aP7WUV72eXWJeP9/r3/K9aLE=
+github.com/aphistic/sweet v0.2.0/go.mod h1:fWDlIh/isSE9n6EPsRmC0det+whmX6dJid3stzu0Xys=
 github.com/atomicgo/cursor v0.0.1 h1:xdogsqa6YYlLfM+GyClC/Lchf7aiMerFiZQn7soTOoU=
 github.com/atomicgo/cursor v0.0.1/go.mod h1:cBON2QmmrysudxNBFthvMtN32r3jxVRIvzkUiF/RuIk=
+github.com/aws/aws-sdk-go v1.20.6/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aybabtme/rgbterm v0.0.0-20170906152045-cc83f3b3ce59/go.mod h1:q/89r3U2H7sSsE2t6Kca0lfwTK8JdoNGS/yzM/4iH5I=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
@ -54,8 +62,8 @@ github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDk
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
 github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
-github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.2 h1:p1EgwI/C7NhT0JmVkwCD2ZBK8j4aeHQX2pMHHBfMQ6w=
+github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@ -65,9 +73,13 @@ github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1m
 github.com/envoyproxy/go-control-plane v0.9.7/go.mod h1:cwu0lG7PUMfa9snN8LXBig5ynNVH9qI8YYLbd1fK2po=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
+github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
+github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@ -121,6 +133,7 @@ github.com/google/pprof v0.0.0-20201023163331-3e6fc7fc9c4c/go.mod h1:kpwsk12EmLe
 github.com/google/pprof v0.0.0-20201203190320-1bf35d6f28c2/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/pprof v0.0.0-20201218002935-b9804c9f04c2/go.mod h1:kpwsk12EmLew5upagYY7GY0pfYCcupk39gWOCRROcvE=
 github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm40UhjYkI=
+github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
@ -129,19 +142,37 @@ github.com/gookit/color v1.4.2 h1:tXy44JFSFkKnELV6WaMo/lLfu/meqITX3iAV52do7lk=
 github.com/gookit/color v1.4.2/go.mod h1:fqRyamkC1W8uxl+lxCQxOT09l/vYfZ+QeiX3rKQHCoQ=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
+github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
+github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
+github.com/jpillora/backoff v0.0.0-20180909062703-3050d21c67d7/go.mod h1:2iMrUgbbvHEiQClaW2NsSzMyGHqN+rDFqY705q49KG0=
 github.com/jstemmer/go-junit-report v0.0.0-20190106144839-af01ea7f8024/go.mod h1:6v2b51hI/fHJwM22ozAgKL4VKDeJcHhJFhtBdhmNjmU=
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@ -156,25 +187,41 @@ github.com/pterm/pterm v0.12.35 h1:A/vHwDM+WByn0sTPlpL2L6kOTy12xqZuwNFMF/NlA+U=
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@ -186,6 +233,7 @@ go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@ -227,6 +275,7 @@ golang.org/x/mod v0.4.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.1/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
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@ -276,7 +325,9 @@ golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
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 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
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@ -468,16 +519,22 @@ google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpAD
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-google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
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+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
--- a/internal/bork/error.go
+++ b/internal/bork/error.go
@ -0,0 +1,15 @@
+package bork
+
+import (
+	"errors"
+	"fmt"
+)
+
+var (
+	ErrMissingMagic  = errors.New("missing magic bytes in file")
+	ErrFileTruncated = errors.New("file/stream is truncated abnormally")
+)
+
+func Newf(format string, args ...interface{}) error {
+	return fmt.Errorf(format, args...)
+}
--- a/internal/bork/error_test.go
+++ b/internal/bork/error_test.go
@ -0,0 +1,11 @@
+package bork
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuild(t *testing.T) {
+	assert.NotNil(t, ErrMissingMagic)
+}
--- a/internal/cli/check.go
+++ b/internal/cli/check.go
@ -3,12 +3,11 @@ package cli
 import (
 	"errors"

-	log "github.com/visionmedia/go-cli-log"
-
+	"github.com/apex/log"
 	"github.com/urfave/cli/v2"
 )

 func (mfa *CLIApp) checkManifestOperation(c *cli.Context) error {
-	log.Error(errors.New("unimplemented"))
+	log.WithError(errors.New("unimplemented"))
 	return nil
 }
--- a/internal/cli/entry_test.go
+++ b/internal/cli/entry_test.go
@ -0,0 +1,12 @@
+package cli
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuild(t *testing.T) {
+	m := &CLIApp{}
+	assert.NotNil(t, m)
+}
--- a/internal/cli/fetch.go
+++ b/internal/cli/fetch.go
@ -1,12 +1,12 @@
 package cli

 import (
-	"fmt"
-
+	"github.com/apex/log"
 	"github.com/urfave/cli/v2"
 )

 func (mfa *CLIApp) fetchManifestOperation(c *cli.Context) error {
-	fmt.Println("fetchManifestOperation()")
-	return nil
+	log.Debugf("fetchManifestOperation()")
+	panic("not implemented")
+	return nil //nolint
 }
--- a/internal/cli/gen.go
+++ b/internal/cli/gen.go
@ -1,36 +1,54 @@
 package cli

 import (
-	"fmt"
+	"bytes"
+	"path/filepath"

+	"git.eeqj.de/sneak/mfer/internal/log"
 	"git.eeqj.de/sneak/mfer/mfer"
-	"github.com/davecgh/go-spew/spew"
 	"github.com/urfave/cli/v2"
 )

-func (mfa *CLIApp) generateManifestOperation(c *cli.Context) error {
-	fmt.Println("generateManifestOperation()")
-	myArgs := c.Args()
-	spew.Dump(myArgs)
+func (mfa *CLIApp) generateManifestOperation(ctx *cli.Context) error {
+	log.Debug("generateManifestOperation()")
+	myArgs := ctx.Args()
+	log.Dump(myArgs)

-	fmt.Printf("%#v\n", c.Args().First())
-	if c.Args().Len() > 0 {
-		fmt.Printf("%#v\n", c.Args().Get(1))
+	opts := &mfer.ManifestScanOptions{
+		IgnoreDotfiles: ctx.Bool("IgnoreDotfiles"),
+		FollowSymLinks: ctx.Bool("FollowSymLinks"),
+	}
+	paths := make([]string, ctx.Args().Len()-1)
+	for i := 0; i < ctx.Args().Len(); i++ {
+		ap, err := filepath.Abs(ctx.Args().Get(i))
+		if err != nil {
+			return err
+		}
+		log.Dump(ap)
+		paths = append(paths, ap)
+	}
+	mf, err := mfer.NewFromPaths(opts, paths...)
+	if err != nil {
+		panic(err)
 	}
+	mf.WithContext(ctx.Context)

-	// fmt.Printf("called with arg: %s\n", c.String("input"))
+	log.Dump(mf)

-	opts := &mfer.ManifestScanOptions{
-		IgnoreDotfiles: c.Bool("IgnoreDotfiles"),
-		FollowSymLinks: c.Bool("FollowSymLinks"),
+	err = mf.Scan()
+	if err != nil {
+		return err
 	}
-	// FIXME add command flags for ignoring dotfiles and following symlinks
-	mf, err := mfer.NewFromPath(c.String("input"), opts)
+
+	buf := new(bytes.Buffer)
+
+	err = mf.WriteTo(buf)
 	if err != nil {
-		panic(err)
+		return err
 	}

-	spew.Dump(mf)
+	dat := buf.Bytes()

+	log.Dump(dat)
 	return nil
 }
--- a/internal/cli/mfer.go
+++ b/internal/cli/mfer.go
@ -5,9 +5,7 @@ import (
 	"os"
 	"time"

-	log "github.com/visionmedia/go-cli-log"
-
-	"github.com/pterm/pterm"
+	"git.eeqj.de/sneak/mfer/internal/log"
 	"github.com/urfave/cli/v2"
 )

@ -20,34 +18,47 @@ type CLIApp struct {
 	app         *cli.App
 }

-func (mfa *CLIApp) printBanner() {
-	s, _ := pterm.DefaultBigText.WithLetters(pterm.NewLettersFromString(mfa.appname)).Srender()
-	pterm.DefaultCenter.Println(s) // Print BigLetters with the default CenterPrinter
-}
+const banner = `              ___           ___         ___           ___
+	     /__/\         /  /\       /  /\         /  /\
+	    |  |::\       /  /:/_     /  /:/_       /  /::\
+	    |  |:|:\     /  /:/ /\   /  /:/ /\     /  /:/\:\
+	  __|__|:|\:\   /  /:/ /:/  /  /:/ /:/_   /  /:/~/:/
+	 /__/::::| \:\ /__/:/ /:/  /__/:/ /:/ /\ /__/:/ /:/___
+	 \  \:\~~\__\/ \  \:\/:/   \  \:\/:/ /:/ \  \:\/:::::/
+	  \  \:\        \  \::/     \  \::/ /:/   \  \::/~~~~
+	   \  \:\        \  \:\      \  \:\/:/     \  \:\
+	    \  \:\        \  \:\      \  \::/       \  \:\
+	     \__\/         \__\/       \__\/         \__\/`

-func (mfa *CLIApp) disableStyling() {
-	pterm.DisableColor()
-	pterm.DisableStyling()
-	pterm.Debug.Prefix.Text = ""
-	pterm.Info.Prefix.Text = ""
-	pterm.Success.Prefix.Text = ""
-	pterm.Warning.Prefix.Text = ""
-	pterm.Error.Prefix.Text = ""
-	pterm.Fatal.Prefix.Text = ""
+func (mfa *CLIApp) printBanner() {
+	fmt.Println(banner)
 }

 func (mfa *CLIApp) VersionString() string {
 	return fmt.Sprintf("%s (%s)", mfa.version, mfa.gitrev)
 }

+func (mfa *CLIApp) setVerbosity(v int) {
+	_, present := os.LookupEnv("MFER_DEBUG")
+	if present {
+		log.EnableDebugLogging()
+	} else {
+		log.SetLevelFromVerbosity(v)
+	}
+}
+
 func (mfa *CLIApp) run() {
 	mfa.startupTime = time.Now()

 	if NO_COLOR {
 		// shoutout to rob pike who thinks it's juvenile
-		mfa.disableStyling()
+		log.DisableStyling()
 	}

+	log.Init()
+
+	var verbosity int
+
 	mfa.app = &cli.App{
 		Name:                 mfa.appname,
 		Usage:                "Manifest generator",
@ -58,6 +69,7 @@ func (mfa *CLIApp) run() {
 				Name:    "verbose",
 				Usage:   "Verbosity level",
 				Aliases: []string{"v"},
+				Count:   &verbosity,
 			},
 			&cli.BoolFlag{
 				Name:    "quiet",
@ -74,6 +86,7 @@ func (mfa *CLIApp) run() {
 					if !c.Bool("quiet") {
 						mfa.printBanner()
 					}
+					mfa.setVerbosity(verbosity)
 					return mfa.generateManifestOperation(c)
 				},
 				Flags: []cli.Flag{
@ -87,13 +100,6 @@ func (mfa *CLIApp) run() {
 						Aliases: []string{"ignore-dotfiles"},
 						Usage:   "Ignore any dot (hidden) files encountered",
 					},
-					// FIXME this should be a positional arg
-					&cli.StringFlag{
-						Name:    "input",
-						Value:   ".",
-						Aliases: []string{"i"},
-						Usage:   "Specify input directory.",
-					},
 					&cli.StringFlag{
 						Name:    "output",
 						Value:   "./index.mf",
@ -109,6 +115,7 @@ func (mfa *CLIApp) run() {
 					if !c.Bool("quiet") {
 						mfa.printBanner()
 					}
+					mfa.setVerbosity(verbosity)
 					return mfa.checkManifestOperation(c)
 				},
 			},
@ -127,6 +134,7 @@ func (mfa *CLIApp) run() {
 					if !c.Bool("quiet") {
 						mfa.printBanner()
 					}
+					mfa.setVerbosity(verbosity)
 					return mfa.fetchManifestOperation(c)
 				},
 			},
@ -137,6 +145,6 @@ func (mfa *CLIApp) run() {
 	err := mfa.app.Run(os.Args)
 	if err != nil {
 		mfa.exitCode = 1
-		log.Error(err)
+		log.WithError(err).Debugf("exiting")
 	}
 }
--- a/internal/log/log.go
+++ b/internal/log/log.go
@ -0,0 +1,89 @@
+package log
+
+import (
+	"fmt"
+	"runtime"
+
+	"github.com/apex/log"
+	acli "github.com/apex/log/handlers/cli"
+	"github.com/davecgh/go-spew/spew"
+	"github.com/pterm/pterm"
+)
+
+type Level = log.Level
+
+func DisableStyling() {
+	pterm.DisableColor()
+	pterm.DisableStyling()
+	pterm.Debug.Prefix.Text = ""
+	pterm.Info.Prefix.Text = ""
+	pterm.Success.Prefix.Text = ""
+	pterm.Warning.Prefix.Text = ""
+	pterm.Error.Prefix.Text = ""
+	pterm.Fatal.Prefix.Text = ""
+}
+
+func Init() {
+	log.SetHandler(acli.Default)
+	log.SetLevel(log.InfoLevel)
+}
+
+func Debugf(format string, args ...interface{}) {
+	DebugReal(fmt.Sprintf(format, args...), 2)
+}
+
+func Debug(arg string) {
+	DebugReal(arg, 2)
+}
+
+func DebugReal(arg string, cs int) {
+	_, callerFile, callerLine, ok := runtime.Caller(cs)
+	if !ok {
+		return
+	}
+	tag := fmt.Sprintf("%s:%d: ", callerFile, callerLine)
+	log.Debug(tag + arg)
+}
+
+func Dump(args ...interface{}) {
+	DebugReal(spew.Sdump(args...), 2)
+}
+
+func EnableDebugLogging() {
+	SetLevel(log.DebugLevel)
+}
+
+func VerbosityStepsToLogLevel(l int) log.Level {
+	switch l {
+	case 1:
+		return log.WarnLevel
+	case 2:
+		return log.InfoLevel
+	case 3:
+		return log.DebugLevel
+	}
+	return log.ErrorLevel
+}
+
+func SetLevelFromVerbosity(l int) {
+	SetLevel(VerbosityStepsToLogLevel(l))
+}
+
+func SetLevel(arg log.Level) {
+	log.SetLevel(arg)
+}
+
+func GetLogger() *log.Logger {
+	if logger, ok := log.Log.(*log.Logger); ok {
+		return logger
+	}
+	panic("unable to get logger")
+}
+
+func GetLevel() log.Level {
+	return GetLogger().Level
+}
+
+func WithError(e error) *log.Entry {
+	return GetLogger().WithError(e)
+}
--- a/internal/log/log_test.go
+++ b/internal/log/log_test.go
@ -0,0 +1,12 @@
+package log
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBuild(t *testing.T) {
+	Init()
+	assert.True(t, true)
+}
--- a/mfer/deserialize.go
+++ b/mfer/deserialize.go
@ -0,0 +1,89 @@
+package mfer
+
+import (
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"io"
+
+	"git.eeqj.de/sneak/mfer/internal/bork"
+	"git.eeqj.de/sneak/mfer/internal/log"
+	"google.golang.org/protobuf/proto"
+)
+
+func (m *manifest) validateProtoOuter() error {
+	if m.pbOuter.Version != MFFileOuter_VERSION_ONE {
+		return errors.New("unknown version")
+	}
+	if m.pbOuter.CompressionType != MFFileOuter_COMPRESSION_GZIP {
+		return errors.New("unknown compression type")
+	}
+
+	bb := bytes.NewBuffer(m.pbOuter.InnerMessage)
+
+	gzr, err := gzip.NewReader(bb)
+	if err != nil {
+		return err
+	}
+
+	dat, err := io.ReadAll(gzr)
+	defer gzr.Close()
+
+	if err != nil {
+		return err
+	}
+
+	isize := len(dat)
+	if int64(isize) != m.pbOuter.Size {
+		log.Debugf("truncated data, got %d expected %d", isize, m.pbOuter.Size)
+		return bork.ErrFileTruncated
+	}
+	log.Debugf("inner data size is %d", isize)
+	log.Dump(dat)
+	log.Dump(m.pbOuter.Sha256)
+	return nil
+}
+
+func validateMagic(dat []byte) bool {
+	ml := len([]byte(MAGIC))
+	if len(dat) < ml {
+		return false
+	}
+	got := dat[0:ml]
+	expected := []byte(MAGIC)
+	return bytes.Equal(got, expected)
+}
+
+func NewFromProto(input io.Reader) (*manifest, error) {
+	m := New()
+	dat, err := io.ReadAll(input)
+	if err != nil {
+		return nil, err
+	}
+	if !validateMagic(dat) {
+		return nil, errors.New("invalid file format")
+	}
+
+	// remove magic bytes prefix:
+	ml := len([]byte(MAGIC))
+	bb := bytes.NewBuffer(dat[ml:])
+	dat = bb.Bytes()
+
+	log.Dump(dat)
+
+	// deserialize:
+	m.pbOuter = new(MFFileOuter)
+	err = proto.Unmarshal(dat, m.pbOuter)
+
+	if err != nil {
+		return nil, err
+	}
+
+	ve := m.validateProtoOuter()
+	if ve != nil {
+		return nil, ve
+	}
+
+	// FIXME TODO deserialize inner
+	return m, nil
+}
--- a/mfer/example_test.go
+++ b/mfer/example_test.go
@ -0,0 +1,42 @@
+package mfer
+
+import (
+	"bytes"
+	"testing"
+
+	"git.eeqj.de/sneak/mfer/internal/log"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestAPIExample(t *testing.T) {
+	// read from filesystem
+	m, err := NewFromFS(&ManifestScanOptions{
+		IgnoreDotfiles: true,
+	}, big)
+	assert.Nil(t, err)
+	assert.NotNil(t, m)
+
+	// scan for files
+	m.Scan()
+
+	// serialize
+	var buf bytes.Buffer
+	m.WriteTo(&buf)
+
+	// show serialized
+	log.Dump(buf.Bytes())
+
+	// do it again
+	var buf2 bytes.Buffer
+	m.WriteTo(&buf2)
+
+	// should be same!
+	assert.True(t, bytes.Equal(buf.Bytes(), buf2.Bytes()))
+
+	// deserialize
+	m2, err := NewFromProto(&buf)
+	assert.Nil(t, err)
+	assert.NotNil(t, m2)
+
+	log.Dump(m2)
+}
--- a/mfer/gen.go
+++ b/mfer/gen.go
@ -1,3 +0,0 @@
-package mfer
-
-//go:generate protoc --go_out=. --go_opt=paths=source_relative mf.proto
--- a/mfer/manifest.go
+++ b/mfer/manifest.go
@ -1,35 +1,42 @@
 package mfer

 import (
+	"bytes"
+	"context"
+	"errors"
 	"fmt"
-	"io"
 	"io/fs"
-	"os"
+	"path"
 	"path/filepath"
 	"strings"

+	"git.eeqj.de/sneak/mfer/internal/log"
 	"github.com/spf13/afero"
 )

-type ManifestFile struct {
-	Path     string
-	FileInfo fs.FileInfo
+type manifestFile struct {
+	path string
+	info fs.FileInfo
 }

-func (m *ManifestFile) String() string {
-	return fmt.Sprintf("<File \"%s\">", m.Path)
+func (m *manifestFile) String() string {
+	return fmt.Sprintf("<File \"%s\">", m.path)
 }

-type Manifest struct {
-	SourceFS      afero.Fs
-	SourceFSRoot  string
-	Files         []*ManifestFile
-	ScanOptions   *ManifestScanOptions
-	TotalFileSize int64
+type manifest struct {
+	sourceFS      []afero.Fs
+	files         []*manifestFile
+	scanOptions   *ManifestScanOptions
+	totalFileSize int64
+	pbInner       *MFFile
+	pbOuter       *MFFileOuter
+	output        *bytes.Buffer
+	ctx           context.Context
+	errors        []*error
 }

-func (m *Manifest) String() string {
-	return fmt.Sprintf("<Manifest count=%d totalSize=%d>", len(m.Files), m.TotalFileSize)
+func (m *manifest) String() string {
+	return fmt.Sprintf("<Manifest count=%d totalSize=%d>", len(m.files), m.totalFileSize)
 }

 type ManifestScanOptions struct {
@ -37,78 +44,130 @@ type ManifestScanOptions struct {
 	FollowSymLinks bool
 }

-func NewFromPath(inputPath string, options *ManifestScanOptions) (*Manifest, error) {
+func (m *manifest) HasError() bool {
+	return len(m.errors) > 0
+}
+
+func (m *manifest) AddError(e error) *manifest {
+	m.errors = append(m.errors, &e)
+	return m
+}
+
+func (m *manifest) WithContext(c context.Context) *manifest {
+	m.ctx = c
+	return m
+}
+
+func (m *manifest) addInputPath(inputPath string) error {
 	abs, err := filepath.Abs(inputPath)
 	if err != nil {
-		return nil, err
+		return err
 	}
-	afs := afero.NewBasePathFs(afero.NewOsFs(), abs)
-	m, err := NewFromFS(afs, options)
-	if err != nil {
-		return nil, err
+	// FIXME check to make sure inputPath/abs exists maybe
+	afs := afero.NewReadOnlyFs(afero.NewBasePathFs(afero.NewOsFs(), abs))
+	return m.addInputFS(afs)
+}
+
+func (m *manifest) addInputFS(f afero.Fs) error {
+	if m.sourceFS == nil {
+		m.sourceFS = make([]afero.Fs, 0)
 	}
-	m.SourceFSRoot = abs
-	return m, nil
+	m.sourceFS = append(m.sourceFS, f)
+	// FIXME do some sort of check on f here?
+	return nil
+}
+
+func New() *manifest {
+	m := &manifest{}
+	return m
 }

-func NewFromFS(fs afero.Fs, options *ManifestScanOptions) (*Manifest, error) {
-	m := &Manifest{
-		SourceFS:    fs,
-		ScanOptions: options,
+func NewFromPaths(options *ManifestScanOptions, inputPaths ...string) (*manifest, error) {
+	log.Dump(inputPaths)
+	m := New()
+	m.scanOptions = options
+	for _, p := range inputPaths {
+		err := m.addInputPath(p)
+		if err != nil {
+			return nil, err
+		}
 	}
-	err := m.Scan()
+	return m, nil
+}
+
+func NewFromFS(options *ManifestScanOptions, fs afero.Fs) (*manifest, error) {
+	m := New()
+	m.scanOptions = options
+	err := m.addInputFS(fs)
 	if err != nil {
 		return nil, err
 	}
 	return m, nil
 }

-func (m *Manifest) Scan() error {
-	// FIXME scan and whatever function does the hashing should take ctx
-	oe := afero.Walk(m.SourceFS, "./", func(path string, info fs.FileInfo, err error) error {
-		if m.ScanOptions.IgnoreDotfiles && strings.HasPrefix(path, ".") {
-			// FIXME make this check all path components BUG
-			return nil
-		}
+func (m *manifest) GetFileCount() int64 {
+	return int64(len(m.files))
+}

-		if info != nil && info.IsDir() {
-			// manifests contain only files, directories are implied.
-			return nil
-		}
+func (m *manifest) GetTotalFileSize() int64 {
+	return m.totalFileSize
+}

-		fileinfo, staterr := m.SourceFS.Stat(path)
-		if staterr != nil {
-			panic(staterr)
+func pathIsHidden(p string) bool {
+	tp := path.Clean(p)
+	if strings.HasPrefix(tp, ".") {
+		return true
+	}
+	for {
+		d, f := path.Split(tp)
+		if strings.HasPrefix(f, ".") {
+			return true
 		}
-
-		nf := &ManifestFile{
-			Path:     path,
-			FileInfo: fileinfo,
+		if d == "" {
+			return false
 		}
-		m.Files = append(m.Files, nf)
-		m.TotalFileSize = m.TotalFileSize + info.Size()
-		return nil
-	})
-	if oe != nil {
-		return oe
+		tp = d[0 : len(d)-1] // trim trailing slash from dir
 	}
-	return nil
 }

-func (m *Manifest) WriteToFile(path string) error {
-	// FIXME refuse to overwrite without -f if file exists
-
-	f, err := os.Create(path)
-	if err != nil {
-		return err
+func (m *manifest) addFile(p string, fi fs.FileInfo, sfsIndex int) error {
+	if m.scanOptions.IgnoreDotfiles && pathIsHidden(p) {
+		return nil
 	}
-	defer f.Close()
-
-	return m.Write(f)
+	if fi != nil && fi.IsDir() {
+		// manifests contain only files, directories are implied.
+		return nil
+	}
+	// FIXME test if 'fi' is already result of stat
+	fileinfo, staterr := m.sourceFS[sfsIndex].Stat(p)
+	if staterr != nil {
+		return staterr
+	}
+	cleanPath := p
+	if cleanPath[0:1] == "/" {
+		cleanPath = cleanPath[1:]
+	}
+	nf := &manifestFile{
+		path: cleanPath,
+		info: fileinfo,
+	}
+	m.files = append(m.files, nf)
+	m.totalFileSize = m.totalFileSize + fi.Size()
+	return nil
 }

-func (m *Manifest) Write(output io.Writer) error {
-	// FIXME implement
-	panic("nope")
-	return nil // nolint:all
+func (m *manifest) Scan() error {
+	// FIXME scan and whatever function does the hashing should take ctx
+	for idx, sfs := range m.sourceFS {
+		if sfs == nil {
+			return errors.New("invalid source fs")
+		}
+		e := afero.Walk(sfs, "/", func(p string, info fs.FileInfo, err error) error {
+			return m.addFile(p, info, idx)
+		})
+		if e != nil {
+			return e
+		}
+	}
+	return nil
 }
--- a/mfer/mf.proto
+++ b/mfer/mf.proto
@ -1,26 +1,34 @@
 syntax = "proto3";

-option go_package = "git.eeqj.de/sneak/mfer";
+option go_package = "git.eeqj.de/sneak/mfer/mfer";

 message Timestamp {
  int64 seconds = 1;
  int32 nanos = 2;
 }

-message MFFile {
+message MFFileOuter {
    enum Version {
-        NONE = 0;
-        ONE = 1; // only one for now
+        VERSION_NONE = 0;
+        VERSION_ONE = 1; // only one for now
    }

    // required mffile root attributes 1xx
    Version version = 101;
-    bytes innerMessage = 102;
+
+    enum CompressionType {
+        COMPRESSION_NONE = 0;
+        COMPRESSION_GZIP = 1;
+    }
+
+    CompressionType compressionType = 102;
+
    // these are used solely to detect corruption/truncation
    // and not for cryptographic integrity.
    int64 size = 103;
    bytes sha256 = 104;

+    bytes innerMessage = 199;
    // 2xx for optional manifest root attributes
    // think we might use gosignify instead of gpg:
    // github.com/frankbraun/gosignify
@ -54,10 +62,10 @@ message MFFileChecksum {
    bytes multiHash = 1;
 }

-message MFFileInner {
+message MFFile {
    enum Version {
-        NONE = 0;
-        ONE = 1; // only one for now
+        VERSION_NONE = 0;
+        VERSION_ONE = 1; // only one for now
    }
    Version version = 100;

--- a/mfer/mfer_test.go
+++ b/mfer/mfer_test.go
@ -1,12 +1,74 @@
 package mfer

-import "testing"
+import (
+	"bytes"
+	"fmt"
+	"testing"
+
+	"git.eeqj.de/sneak/mfer/internal/log"
+	"github.com/spf13/afero"
+	"github.com/stretchr/testify/assert"
+)

 // Add those variables as well
 var (
-	existingFolder    = "./testdata/a-folder-that-exists"
-	nonExistingFolder = "./testdata/a-folder-that-does-not-exists"
+	existingFolder = "./testdata/a-folder-that-exists"
 )

-func TestManifestGeneration(t *testing.T) {
+var (
+	af  *afero.Afero = &afero.Afero{Fs: afero.NewMemMapFs()}
+	big *afero.Afero = &afero.Afero{Fs: afero.NewMemMapFs()}
+)
+
+func init() {
+	log.EnableDebugLogging()
+
+	// create test files and directories
+	af.MkdirAll("/a/b/c", 0o755)
+	af.MkdirAll("/.hidden", 0o755)
+	af.WriteFile("/a/b/c/hello.txt", []byte("hello world\n\n\n\n"), 0o755)
+	af.WriteFile("/a/b/c/hello2.txt", []byte("hello world\n\n\n\n"), 0o755)
+	af.WriteFile("/.hidden/hello.txt", []byte("hello world\n"), 0o755)
+	af.WriteFile("/.hidden/hello2.txt", []byte("hello world\n"), 0o755)
+
+	big.MkdirAll("/home/user/Library", 0o755)
+	for i := range [25]int{} {
+		big.WriteFile(fmt.Sprintf("/home/user/Library/hello%d.txt", i), []byte("hello world\n"), 0o755)
+	}
+}
+
+func TestPathHiddenFunc(t *testing.T) {
+	assert.False(t, pathIsHidden("/a/b/c/hello.txt"))
+	assert.True(t, pathIsHidden("/a/b/c/.hello.txt"))
+	assert.True(t, pathIsHidden("/a/.b/c/hello.txt"))
+	assert.True(t, pathIsHidden("/.a/b/c/hello.txt"))
+	assert.False(t, pathIsHidden("./a/b/c/hello.txt"))
+}
+
+func TestManifestGenerationOne(t *testing.T) {
+	m, err := NewFromFS(&ManifestScanOptions{
+		IgnoreDotfiles: true,
+	}, af)
+	assert.Nil(t, err)
+	assert.NotNil(t, m)
+	m.Scan()
+	assert.Equal(t, int64(2), m.GetFileCount())
+	assert.Equal(t, int64(30), m.GetTotalFileSize())
+}
+
+func TestManifestGenerationTwo(t *testing.T) {
+	m, err := NewFromFS(&ManifestScanOptions{
+		IgnoreDotfiles: false,
+	}, af)
+	assert.Nil(t, err)
+	assert.NotNil(t, m)