Following changes:

 * Refactored code
 * Replaced Travis with Github Actions
 * Increased file sample size and improved file path logic
 * Improved doc
 * Go version upgrade and library upgrades

.github/workflows/build-and-test.yml

@@ -12,7 +12,7 @@ jobs:
       - name: Setup Golang
         uses: actions/setup-go@v2
         with:
-          go-version: 1.16
+          go-version: 1.17
       - name: Build code
         run: go build
       - name: Test code

Dockerfile

@@ -1,12 +1,20 @@
-FROM golang:1.16.3-alpine3.13 as builder
+FROM golang:1.17-alpine3.14 as builder
+
+RUN apk --no-cache add build-base
 
 WORKDIR /opt/rsync-sidekick
 
-ADD . ./
+COPY ./go.mod ./go.sum ./
+
+RUN go mod download -x
+
+COPY . .
 
 RUN go build
 
-FROM alpine:3.13
+RUN go test ./...
+
+FROM alpine:3.14
 
 RUN apk --no-cache add bash rsync
 

README.md

@@ -21,15 +21,18 @@ This propagates following changes from _source directory_ to _destination direct
 Note:
 
 * This tool **does not delete** any files or folders (under any circumstances) -- that's why safe-to-use 😌
-  * Your files are just _moved around_
-  * Now, if you're uncomfortable with this tool even moving your files around, there is a `-shellscript` option, that just generates a script for you to read and run (think of it like a `--dry-run` option)
+    * Your files are just _moved around_
+    * Now, if you're uncomfortable with this tool even moving your files around, there is a `-shellscript` option, that
+      just generates a script for you to read and run (think of it like a `--dry-run` option)
 * This tool **does not** actually **transfer** files -- that's for `rsync` to do 🙂
-* Since you'd run `rsync` after this tool is run, any changes that this tool couldn't propagate would just be propagated by `rsync`
-  *  So the most that you might lose is some time with `rsync` doing more work than it could have -- Which is likely still much less than not using this tool at all 😄
+* Since you'd run `rsync` after this tool is run, any changes that this tool couldn't propagate would just be propagated
+  by `rsync`
+    * So the most that you might lose is some time with `rsync` doing more work than it could have -- Which is likely
+      still much less than not using this tool at all 😄
 
 ## How to install?
 
-1. Install Go **1.16**
+1. Install Go version at least **1.17**
     * On Ubuntu: `snap install go`
     * On Mac: `brew install go`
     * For anything else: [Go downloads page](https://golang.org/dl/)
@@ -58,7 +61,9 @@ rsync -av /Users/manu/Photos/ /Volumes/Portable/Photos/
 ```
 
 ## Command line options
+
 Running `rsync-sidekick -help` displays following information:
+
 ```
 usage:
 	rsync-sidekick <flags> [source-dir] [destination-dir]
@@ -95,5 +100,6 @@ and sometimes are dangerous! `rsync-sidekick` is reliable alternative to all the
 
 ### How will I benefit from using this tool?
 
-Using `rsync-sidekick` before `rsrync` makes your backup process significantly faster than using only `rsync`. Sometimes 
-this performance benefit can even be 100x😲, if the only changes at your _source directory_ are the 3 types mentioned earlier in this article.
+Using `rsync-sidekick` before `rsrync` makes your backup process significantly faster than using only `rsync`. Sometimes
+this performance benefit can even be 100x😲, if the only changes at your _source directory_ are the 3 types mentioned
+earlier in this article.

doc.go

@@ -0,0 +1,6 @@
+/*
+Propagates file renames, movements and timestamp changes before rsync runs
+
+Visit: https://github.com/m-manu/rsync-sidekick/
+*/
+package main

entity/string_set.go

@@ -0,0 +1,23 @@
+package entity
+
+// StringSet is a set of string elements
+type StringSet map[string]struct{}
+
+// StringSetOf creates a set with given elements
+func StringSetOf(s ...string) StringSet {
+	set := make(StringSet, len(s))
+	for i := 0; i < len(s); i++ {
+		set[s[i]] = struct{}{}
+	}
+	return set
+}
+
+// NewStringSet creates a set of given size
+func NewStringSet(size int) StringSet {
+	return make(StringSet, size)
+}
+
+// Add adds element to set
+func (set StringSet) Add(e string) {
+	set[e] = struct{}{}
+}

go.mod

@@ -1,8 +1,14 @@
 module github.com/m-manu/rsync-sidekick
 
-go 1.16
+go 1.17
 
 require (
 	github.com/stretchr/testify v1.7.0
-	golang.org/x/text v0.3.6
+	golang.org/x/text v0.3.7
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.0 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c // indirect
 )

go.sum

@@ -5,8 +5,8 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN
 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/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=