3bc100aeb3
This adds support for gitignore-like wildcards and exclude patters in reverse mode. It (somewhat) fixes #273: no regexp support, but the syntax should be powerful enough to satisfy most needs. Also, since adding a lot of --exclude options can be tedious, it adds the --exclude-from option to read patterns from a file (or files).
67 lines
2.1 KiB
Go
67 lines
2.1 KiB
Go
package fusefrontend_reverse
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import (
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"io/ioutil"
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"os"
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"strings"
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"github.com/rfjakob/gocryptfs/internal/exitcodes"
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"github.com/rfjakob/gocryptfs/internal/fusefrontend"
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"github.com/rfjakob/gocryptfs/internal/tlog"
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"github.com/sabhiram/go-gitignore"
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)
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// prepareExcluder creates an object to check if paths are excluded
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// based on the patterns specified in the command line.
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func (rfs *ReverseFS) prepareExcluder(args fusefrontend.Args) {
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if len(args.Exclude) > 0 || len(args.ExcludeWildcard) > 0 || len(args.ExcludeFrom) > 0 {
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excluder, err := ignore.CompileIgnoreLines(getExclusionPatterns(args)...)
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if err != nil {
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tlog.Fatal.Printf("Error compiling exclusion rules: %q", err)
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os.Exit(exitcodes.ExcludeError)
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}
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rfs.excluder = excluder
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}
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}
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// getExclusionPatters prepares a list of patterns to be excluded.
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// Patterns passed in the -exclude command line option are prefixed
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// with a leading '/' to preserve backwards compatibility (before
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// wildcard matching was implemented, exclusions always were matched
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// agains the full path).
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func getExclusionPatterns(args fusefrontend.Args) []string {
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patterns := make([]string, len(args.Exclude)+len(args.ExcludeWildcard))
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// add -exclude
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for i, p := range args.Exclude {
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patterns[i] = "/" + p
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}
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// add -exclude-wildcard
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copy(patterns[len(args.Exclude):], args.ExcludeWildcard)
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// add -exclude-from
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for _, file := range args.ExcludeFrom {
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lines, err := getLines(file)
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if err != nil {
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tlog.Fatal.Printf("Error reading exclusion patterns: %q", err)
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os.Exit(exitcodes.ExcludeError)
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}
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patterns = append(patterns, lines...)
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}
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return patterns
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}
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// getLines reads a file and splits it into lines
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func getLines(file string) ([]string, error) {
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buffer, err := ioutil.ReadFile(file)
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if err != nil {
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return nil, err
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}
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return strings.Split(string(buffer), "\n"), nil
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}
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// isExcludedPlain finds out if the plaintext path "pPath" is
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// excluded (used when -exclude is passed by the user).
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func (rfs *ReverseFS) isExcludedPlain(pPath string) bool {
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return rfs.excluder != nil && rfs.excluder.MatchesPath(pPath)
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}
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