Will now do things pure Go instead of running commands (#115)

* Will now do things pure Go instead of running commands
*If it's working*

* Automatically resolve symlink's for thumbnail
Try to prefil some desktop entry information from the appimage's desktop file

* Initial commit for seperated library.

* Simplifed GoAppImage
Removed code that's only valuable to appimaged
Used goto statements to help with command fallback.

* More work on the goappimage library.
Will now try to parse the desktop file at creation and get the AppImage's name from it
ExtractFile can now (for type 2 with a working reader) resolve symlinks
Added the ability to get the icon (a bit half baked right now though)
Changed getFSTime to ModTime to be consistent with os.File.

* Expirementing with using a library for type 1

* A bit more work on ExtractFileReader

* Working on archiverReader type

* Gave up on archiveReader
Implemented symlink resolution for type 1 AppImages.

* Re-implemented archiveReader.
Still need to make it work with the main library though.

* Maybe finished with the library?
archiveReader should work properly for both type1 and type2
Mainly just need to test everything right now.

* Fixed some issues

* Initial integration of goappimage into appimaged

* Possible fix

* Messing around to get TravisCI to work

* Fixed broken build due to a library

* Trying to figure out why travisCI isn't building

* Trying to figure out why TravisCI for otiai10/copy

* Laid the foundation for command fallback for type2
Reverted some changes I made to debug TravisCI failing

* Added some fallback for type 2
Changed to CalebQ42/copy temporarily

* Some work on type2 command fallback.

* Finished command backup for type 2
All file handling is done through archivereader so things can be much cleaner.
Cleaned up thumbnail getting
Changed back to otiai10/copy

* Updated to newest sqashfs to fix issues.
Fixed some issues with thumbnails and desktop files

go.mod

@@ -3,35 +3,35 @@ module github.com/probonopd/go-appimage
 go 1.13
 
 require (
-	github.com/CalebQ42/copy v1.4.1
+	github.com/CalebQ42/squashfs v0.3.6
 	github.com/StackExchange/wmi v0.0.0-20190523213315-cbe66965904d // indirect
 	github.com/acobaugh/osrelease v0.0.0-20181218015638-a93a0a55a249
-	github.com/adrg/xdg v0.2.1
+	github.com/adrg/xdg v0.2.3
 	github.com/alokmenghrajani/gpgeez v0.0.0-20161206084504-1a06f1c582f9
-	github.com/coreos/go-systemd/v22 v22.0.0
-	github.com/eclipse/paho.mqtt.golang v1.2.0
+	github.com/coreos/go-systemd/v22 v22.1.0
+	github.com/eclipse/paho.mqtt.golang v1.3.0
 	github.com/esiqveland/notify v0.9.1
 	github.com/go-ole/go-ole v1.2.4 // indirect
 	github.com/godbus/dbus/v5 v5.0.3
 	github.com/google/go-github v17.0.0+incompatible
 	github.com/grandcat/zeroconf v1.0.0
 	github.com/h2non/go-is-svg v0.0.0-20160927212452-35e8c4b0612c
 	github.com/hashicorp/go-version v1.2.0
+	github.com/otiai10/copy v1.4.1
 	github.com/probonopd/go-zsyncmake v0.0.0-20181008012426-5db478ac2be7
-	github.com/prometheus/procfs v0.0.10
+	github.com/prometheus/procfs v0.2.0
 	github.com/rjeczalik/notify v0.9.2
 	github.com/sabhiram/png-embed v0.0.0-20180421025336-149afe9a3ccb
 	github.com/sabhiram/pngr v0.0.0-20180419043407-2df49b015d4b // indirect
-	github.com/shirou/gopsutil v2.20.2+incompatible
-	github.com/shuheiktgw/go-travis v0.2.4
-	github.com/smartystreets/goconvey v1.6.4 // indirect
+	github.com/shirou/gopsutil v3.20.11+incompatible
+	github.com/shuheiktgw/go-travis v0.3.1
 	github.com/srwiley/oksvg v0.0.0-20200311192757-870daf9aa564
 	github.com/srwiley/rasterx v0.0.0-20200120212402-85cb7272f5e9
-	github.com/urfave/cli/v2 v2.2.0
+	github.com/urfave/cli/v2 v2.3.0
 	go.lsp.dev/uri v0.3.0
-	golang.org/x/crypto v0.0.0-20200311171314-f7b00557c8c4
-	golang.org/x/image v0.0.0-20200119044424-58c23975cae1 // indirect
-	golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527
-	gopkg.in/ini.v1 v1.55.0
+	golang.org/x/crypto v0.0.0-20201221181555-eec23a3978ad
+	golang.org/x/image v0.0.0-20201208152932-35266b937fa6 // indirect
+	golang.org/x/sys v0.0.0-20201221093633-bc327ba9c2f0
+	gopkg.in/ini.v1 v1.62.0
 	gopkg.in/src-d/go-git.v4 v4.13.1
 )

internal/helpers/helpers.go

@@ -102,7 +102,7 @@ func AddHereToPath() {
 // FilesWithSuffixInDirectoryRecursive returns the files in a given directory with the given filename extension, and err
 func FilesWithSuffixInDirectoryRecursive(directory string, extension string) []string {
 	var foundfiles []string
-	err := filepath.Walk(directory, func(path string, info os.FileInfo, err error) error {
+	err := filepath.Walk(directory, func(path string, info os.FileInfo, _ error) error {
 		if strings.HasSuffix(info.Name(), extension) {
 			foundfiles = append(foundfiles, path)
 		}
@@ -158,13 +158,12 @@ func CheckIfFileExists(filepath string) bool {
 	return true
 }
 
-
 // CheckIfFileOrFolderExists checks if a file exists and is not a directory before we
 // try using it to prevent further errors.
 // Returns true if it does, false otherwise.
 func CheckIfFileOrFolderExists(filepath string) bool {
 	_, err := os.Stat(filepath)
-	if os.IsNotExist(err){
+	if os.IsNotExist(err) {
 		return false
 	}
 	return true