implement syncher

.gitignore

@@ -1,6 +1,3 @@
-# If you prefer the allow list template instead of the deny list, see community template:
-# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
-#
 # Binaries for programs and plugins
 *.exe
 *.exe~
@@ -16,6 +13,3 @@
 
 # Dependency directories (remove the comment below to include it)
 # vendor/
-
-# Go workspace file
-go.work

LICENSE

@@ -0,0 +1,13 @@
+Copyright (c) 2010-2021, The Arizona Board of Regents on behalf of The University of Arizona
+
+All rights reserved.
+
+Developed by: CyVerse as a collaboration between participants at BIO5 at The University of Arizona (the primary hosting institution), Cold Spring Harbor Laboratory, The University of Texas at Austin, and individual contributors. Find out more at http://www.cyverse.org/.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+ * Neither the name of CyVerse, BIO5, The University of Arizona, Cold Spring Harbor Laboratory, The University of Texas at Austin, nor the names of other contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Makefile

@@ -0,0 +1,15 @@
+PKG=github.com/cyverse/overlayfs-syncher
+VERSION=v0.1.0
+GIT_COMMIT?=$(shell git rev-parse HEAD)
+BUILD_DATE?=$(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+LDFLAGS?=""
+GO111MODULE=on
+GOPROXY=direct
+GOPATH=$(shell go env GOPATH)
+
+.EXPORT_ALL_VARIABLES:
+
+.PHONY: build
+build:
+	mkdir -p bin
+	CGO_ENABLED=0 GOOS=linux go build -ldflags=${LDFLAGS} -o bin/overlayfs-syncher ./cmd/

README.md

@@ -1,2 +1,3 @@
-# overlayfs-syncher
-offline sync (merge) overlayfs's upper layer to lower layer
+# OverlayFS-Syncher
+Offline sync (merge) overlayfs's upper layer to lower layer
+

cmd/main.go

@@ -0,0 +1,36 @@
+package main
+
+import (
+	"os"
+
+	"github.com/cyverse/overlayfs-syncher/syncher"
+	log "github.com/sirupsen/logrus"
+)
+
+func main() {
+	logger := log.WithFields(log.Fields{
+		"package":  "main",
+		"function": "main",
+	})
+
+	logger.Logger.SetLevel(log.DebugLevel)
+
+	if len(os.Args) != 3 {
+		logger.Fatalf("need two arguments, lower and upper paths")
+		os.Exit(1)
+	}
+
+	syncher, err := syncher.NewOverlayFSSyncher(os.Args[1], os.Args[2])
+	if err != nil {
+		logger.Fatalf("%+v", err)
+		os.Exit(1)
+	}
+
+	//syncher.SetDryRun(true)
+
+	err = syncher.Sync()
+	if err != nil {
+		logger.Fatalf("%+v", err)
+		os.Exit(1)
+	}
+}

go.mod

@@ -0,0 +1,13 @@
+module github.com/cyverse/overlayfs-syncher
+
+go 1.18
+
+require (
+	github.com/sirupsen/logrus v1.9.3
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028
+)
+
+require (
+	github.com/pkg/xattr v0.4.9 // indirect
+	golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect
+)

go.sum

@@ -0,0 +1,20 @@
+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=
+github.com/pkg/xattr v0.4.9 h1:5883YPCtkSd8LFbs13nXplj9g9tlrwoJRjgpgMu1/fE=
+github.com/pkg/xattr v0.4.9/go.mod h1:di8WF84zAKk8jzR1UBTEWh9AUlIZZ7M/JNt8e9B6ktU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/sirupsen/logrus v1.9.3 h1:dueUQJ1C2q9oE3F7wvmSGAaVtTmUizReu6fjN8uqzbQ=
+github.com/sirupsen/logrus v1.9.3/go.mod h1:naHLuLoDiP4jHNo9R0sCBMtWGeIprob74mVsIT4qYEQ=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+golang.org/x/sys v0.0.0-20220408201424-a24fb2fb8a0f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 h1:0A+M6Uqn+Eje4kHMK80dtF3JCXC4ykBgQG4Fe06QRhQ=
+golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 h1:+cNy6SZtPcJQH3LJVLOSmiC7MMxXNOb3PU/VUEz+EhU=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028/go.mod h1:NDW/Ps6MPRej6fsCIbMTohpP40sJ/P/vI1MoTEGwX90=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=