mirror of
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81 lines
2.0 KiB
Go
81 lines
2.0 KiB
Go
package util
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import (
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"errors"
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"fmt"
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"os"
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"os/user"
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"strings"
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b58 "github.com/jbenet/go-base58"
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mh "github.com/jbenet/go-multihash"
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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 = errors.New("Error: Not Found.")
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// Key is a string representation of multihash for use with maps.
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type Key string
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func (k Key) Pretty() string {
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return b58.Encode([]byte(k))
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}
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// Hash is the global IPFS hash function. uses multihash SHA2_256, 256 bits
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func Hash(data []byte) (mh.Multihash, error) {
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return mh.Sum(data, mh.SHA2_256, -1)
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}
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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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if strings.HasPrefix(filename, "~/") {
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usr, err := user.Current()
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if err != nil {
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return "", err
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}
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dir := usr.HomeDir + "/"
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filename = strings.Replace(filename, "~/", dir, 1)
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}
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return filename, nil
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}
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// PErr is a shorthand printing function to output to Stderr.
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func PErr(format string, a ...interface{}) {
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fmt.Fprintf(os.Stderr, format+"\n", a...)
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}
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// POut is a shorthand printing function to output to Stdout.
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func POut(format string, a ...interface{}) {
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fmt.Fprintf(os.Stdout, format+"\n", a...)
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}
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// DErr is a shorthand debug printing function to output to Stderr.
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// Will only print if Debug is true.
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func DErr(format string, a ...interface{}) {
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if Debug {
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PErr(format, a...)
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}
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}
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// DOut is a shorthand debug printing function to output to Stdout.
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// Will only print if Debug is true.
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func DOut(format string, a ...interface{}) {
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if Debug {
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POut(format, a...)
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}
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}
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