server/public/ -- pre-requisite changes (#23278)

* invert depdendency: filestore -> model

* markdown: nolint:misspell

* inline jsonutils within model

* push model.GetInfoForBytes -> channels/app

* push channel/utils.CompileGo* -> plugin/utils

* push plugin/scheduler -> channels/jobs/plugins

* push utils.Copy(File|Dir) -> model

* oauthproiders/gitlab -> channels/app/oauthproviders/gitlab

* decouple plugin from einterfaces.MetricsInterface

* fix TestGetInfoForFile

* Revert "Run golangci in server CI (#23240)"

This reverts commit 349e5d4573.

* add model/utils

---------

Co-authored-by: Agniva De Sarker <agnivade@yahoo.co.in>

server/channels/utils/file.go

@@ -5,119 +5,9 @@ package utils
 
 import (
 	"errors"
-	"fmt"
 	"io"
-	"os"
-	"path/filepath"
 )
 
-// CopyFile will copy a file from src path to dst path.
-// Overwrites any existing files at dst.
-// Permissions are copied from file at src to the new file at dst.
-func CopyFile(src, dst string) (err error) {
-	in, err := os.Open(src)
-	if err != nil {
-		return
-	}
-	defer in.Close()
-
-	if err = os.MkdirAll(filepath.Dir(dst), os.ModePerm); err != nil {
-		return
-	}
-	out, err := os.Create(dst)
-	if err != nil {
-		return
-	}
-	defer func() {
-		if e := out.Close(); e != nil {
-			err = e
-		}
-	}()
-
-	_, err = io.Copy(out, in)
-	if err != nil {
-		return
-	}
-
-	err = out.Sync()
-	if err != nil {
-		return
-	}
-
-	stat, err := os.Stat(src)
-	if err != nil {
-		return
-	}
-	err = os.Chmod(dst, stat.Mode())
-	if err != nil {
-		return
-	}
-
-	return
-}
-
-// CopyDir will copy a directory and all contained files and directories.
-// src must exist and dst must not exist.
-// Permissions are preserved when possible. Symlinks are skipped.
-func CopyDir(src string, dst string) (err error) {
-	src = filepath.Clean(src)
-	dst = filepath.Clean(dst)
-
-	stat, err := os.Stat(src)
-	if err != nil {
-		return
-	}
-	if !stat.IsDir() {
-		return fmt.Errorf("source must be a directory")
-	}
-
-	_, err = os.Stat(dst)
-	if err != nil && !os.IsNotExist(err) {
-		return
-	}
-	if err == nil {
-		return fmt.Errorf("destination already exists")
-	}
-
-	err = os.MkdirAll(dst, stat.Mode())
-	if err != nil {
-		return
-	}
-
-	items, err := os.ReadDir(src)
-	if err != nil {
-		return
-	}
-
-	for _, item := range items {
-		srcPath := filepath.Join(src, item.Name())
-		dstPath := filepath.Join(dst, item.Name())
-
-		if item.IsDir() {
-			err = CopyDir(srcPath, dstPath)
-			if err != nil {
-				return
-			}
-		} else {
-			info, ierr := item.Info()
-			if ierr != nil {
-				continue
-			}
-
-			if info.Mode()&os.ModeSymlink != 0 {
-				continue
-			}
-
-			err = CopyFile(srcPath, dstPath)
-			if err != nil {
-				return
-			}
-		}
-	}
-
-	return
-}
-
 var SizeLimitExceeded = errors.New("Size limit exceeded")
 
 type LimitedReaderWithError struct {