pack: added .packignore

In some cases, there are files that may be useful, but should not
be part of artifact. The ability to add files and directories to
the .packignore file has been added, which allows you to ignore
these files and directories when packing.

Closes: [812](#812)

Author: Japsty

cli/pack/common.go

@@ -277,14 +277,30 @@ func getDestAppDir(bundleEnvPath, appName string,
 
 // copyApplications copies applications from current env to the result bundle.
 func copyApplications(bundleEnvPath string, packCtx *PackCtx,
-	cliOpts, newOpts *config.CliOpts) error {
-	var err error
+	cliOpts, newOpts *config.CliOpts, toIgnore map[string]struct{}) error {
 	for appName, instances := range packCtx.AppsInfo {
 		if len(instances) == 0 {
 			return fmt.Errorf("application %q does not have any instances", appName)
 		}
 		inst := instances[0]
 		appPath := inst.AppDir
+
+		projectPath := filepath.Dir(packCtx.configFilePath)
+		relAppPath, err := filepath.Rel(projectPath, appPath)
+		if err != nil {
+			return err
+		}
+		relAppPathUnix := filepath.ToSlash(relAppPath)
+
+		ignore, err := shouldIgnore(relAppPathUnix, toIgnore)
+		if err != nil {
+			return err
+		}
+		if ignore {
+			log.Infof("Application %s found in .packignore, skipping it...", appName)
+			continue
+		}
+
 		if inst.IsFileApp {
 			appPath = inst.InstanceScript
 			resolvedAppPath, err := filepath.EvalSymlinks(appPath)
@@ -363,6 +379,12 @@ func prepareBundle(cmdCtx *cmdcontext.CmdCtx, packCtx *PackCtx,
 	packCtx.AppList = getAppNamesToPack(packCtx)
 	log.Infof("Apps to pack: %s", strings.Join(packCtx.AppList, " "))
 
+	projectPath := filepath.Dir(packCtx.configFilePath)
+	ignorePatterns, err := readPackIgnore(projectPath)
+	if err != nil {
+		return "", fmt.Errorf("failed to read .packignore: %v", err)
+	}
+
 	if bundleEnvPath, err = updateEnvPath(bundleEnvPath, packCtx, cliOpts); err != nil {
 		return "", err
 	}
@@ -373,12 +395,12 @@ func prepareBundle(cmdCtx *cmdcontext.CmdCtx, packCtx *PackCtx,
 		return "", fmt.Errorf("error copying binaries: %s", err)
 	}
 
-	if err = copyApplications(bundleEnvPath, packCtx, cliOpts, newOpts); err != nil {
+	if err = copyApplications(bundleEnvPath, packCtx, cliOpts, newOpts, ignorePatterns); err != nil {
 		return "", fmt.Errorf("error copying applications: %s", err)
 	}
 
 	if packCtx.Archive.All {
-		if err = copyArtifacts(*packCtx, bundleEnvPath, newOpts, packCtx.AppsInfo); err != nil {
+		if err = copyArtifacts(*packCtx, bundleEnvPath, newOpts, packCtx.AppsInfo, ignorePatterns); err != nil {
 			return "", fmt.Errorf("failed copying artifacts: %s", err)
 		}
 	}
@@ -425,7 +447,7 @@ func copyAppSrc(packCtx *PackCtx, cliOpts *config.CliOpts, srcAppPath, dstAppPat
 // copyArtifacts copies all artifacts from the current bundle configuration
 // to the passed package structure from the passed path.
 func copyArtifacts(packCtx PackCtx, basePath string, newOpts *config.CliOpts,
-	appsInfo map[string][]running.InstanceCtx) error {
+	appsInfo map[string][]running.InstanceCtx, toIgnore map[string]struct{}) error {
 
 	for _, appName := range packCtx.AppList {
 		for _, inst := range appsInfo[appName] {

cli/pack/ignore.go

@@ -0,0 +1,61 @@
+package pack
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// readPackIgnore reads the .packignore file and returns a slice of ignore patterns.
+func readPackIgnore(projectPath string) (map[string]struct{}, error) {
+	ignoreFilePath := filepath.Join(projectPath, ".packignore")
+	file, err := os.Open(ignoreFilePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return map[string]struct{}{}, nil
+		}
+		return nil, err
+	}
+	defer file.Close()
+
+	patterns := make(map[string]struct{})
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		patterns[line] = struct{}{}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+	return patterns, nil
+}
+
+// shouldIgnore checks if the given file path matches any of the ignore patterns.
+func shouldIgnore(path string, patterns map[string]struct{}) (bool, error) {
+	for pattern := range patterns {
+		pattern = filepath.ToSlash(pattern)
+		filePath := filepath.ToSlash(path)
+
+		if strings.HasSuffix(pattern, "/") {
+			if strings.HasPrefix(filePath, pattern) {
+				return true, nil
+			}
+			continue
+		}
+
+		match, err := filepath.Match(pattern, filePath)
+		if err != nil {
+			return false, err
+		}
+		if match {
+			return true, nil
+		}
+	}
+	return false, nil
+}

test/integration/pack/test_bundles/bundle_with_packignore/.packignore

@@ -0,0 +1,3 @@
+app.lua
+instances_enabled/app1.lua
+instances_enabled/app1

test/integration/pack/test_bundles/bundle_with_packignore/app.lua

@@ -0,0 +1 @@
+../bundle1/app2

test/integration/pack/test_bundles/bundle_with_packignore/app2

@@ -0,0 +1 @@
+../bundle1/instances_enabled

test/integration/pack/test_bundles/bundle_with_packignore/instances_enabled

@@ -0,0 +1 @@
+../bundle1/modules

test/integration/pack/test_bundles/bundle_with_packignore/modules

@@ -0,0 +1 @@
+../bundle1/tt.yaml