mirror of
https://github.com/ipfs/kubo.git
synced 2026-02-23 03:17:43 +08:00
07b064010e
refactor test peer creation to be deterministic and reliable a bit of cleanup trying to figure out TestGetFailure add test to verify deterministic peer creation switch put RPC over to use getClosestPeers rm 0xDEADC0DE fix queries not searching peer if its not actually closer
129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
// package util implements various utility functions used within ipfs
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// that do not currently have a better place to live.
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package util
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import (
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"errors"
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"io"
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"math/rand"
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"os"
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"path/filepath"
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"runtime/debug"
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"strings"
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"time"
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ds "github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/jbenet/go-datastore"
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"github.com/jbenet/go-ipfs/Godeps/_workspace/src/github.com/mitchellh/go-homedir"
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)
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// Debug is a global flag for debugging.
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var Debug bool
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// ErrNotImplemented signifies a function has not been implemented yet.
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var ErrNotImplemented = errors.New("Error: not implemented yet.")
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// ErrTimeout implies that a timeout has been triggered
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var ErrTimeout = errors.New("Error: Call timed out.")
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// ErrSeErrSearchIncomplete implies that a search type operation didnt
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// find the expected node, but did find 'a' node.
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var ErrSearchIncomplete = errors.New("Error: Search Incomplete.")
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// ErrNotFound is returned when a search fails to find anything
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var ErrNotFound = ds.ErrNotFound
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// ErrNoSuchLogger is returned when the util pkg is asked for a non existant logger
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var ErrNoSuchLogger = errors.New("Error: No such logger")
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// TildeExpansion expands a filename, which may begin with a tilde.
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func TildeExpansion(filename string) (string, error) {
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return homedir.Expand(filename)
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}
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// ErrCast is returned when a cast fails AND the program should not panic.
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func ErrCast() error {
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debug.PrintStack()
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return errCast
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}
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var errCast = errors.New("cast error")
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// ExpandPathnames takes a set of paths and turns them into absolute paths
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func ExpandPathnames(paths []string) ([]string, error) {
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var out []string
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for _, p := range paths {
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abspath, err := filepath.Abs(p)
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if err != nil {
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return nil, err
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}
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out = append(out, abspath)
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}
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return out, nil
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}
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// byteChanReader wraps a byte chan in a reader
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type byteChanReader struct {
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in chan []byte
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buf []byte
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}
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func NewByteChanReader(in chan []byte) io.Reader {
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return &byteChanReader{in: in}
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}
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func (bcr *byteChanReader) Read(output []byte) (int, error) {
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remain := output
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remainLen := len(output)
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outputLen := 0
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more := false
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next := bcr.buf
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for {
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n := copy(remain, next)
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remainLen -= n
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outputLen += n
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if remainLen == 0 {
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bcr.buf = next[n:]
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return outputLen, nil
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}
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remain = remain[n:]
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next, more = <-bcr.in
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if !more {
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return outputLen, io.EOF
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}
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}
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}
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type randGen struct {
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rand.Rand
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}
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func NewTimeSeededRand() io.Reader {
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src := rand.NewSource(time.Now().UnixNano())
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return &randGen{
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Rand: *rand.New(src),
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}
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}
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func NewSeededRand(seed int64) io.Reader {
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src := rand.NewSource(seed)
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return &randGen{
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Rand: *rand.New(src),
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}
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}
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func (r *randGen) Read(p []byte) (n int, err error) {
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for i := 0; i < len(p); i++ {
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p[i] = byte(r.Rand.Intn(255))
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}
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return len(p), nil
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}
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// GetenvBool is the way to check an env var as a boolean
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func GetenvBool(name string) bool {
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v := strings.ToLower(os.Getenv(name))
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return v == "true" || v == "t" || v == "1"
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}
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