66 lines
1.6 KiB
Go
66 lines
1.6 KiB
Go
// Copyright 2022 Clayton Craft <clayton@craftyguy.net>
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// SPDX-License-Identifier: GPL-3.0-or-later
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package misc
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import (
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"errors"
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"log"
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"os"
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"time"
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)
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// Merge the contents of "b" into "a", overwriting any previously existing keys
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// in "a"
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func Merge(a map[string]string, b map[string]string) {
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for k, v := range b {
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a[k] = v
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}
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}
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// Removes duplicate entries from the given string slice and returns a slice
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// with the unique values
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func RemoveDuplicates(in []string) (out []string) {
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// use a map to "remove" duplicates. the value in the map is totally
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// irrelevant
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outMap := make(map[string]bool)
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for _, s := range in {
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if ok := outMap[s]; !ok {
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outMap[s] = true
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}
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}
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out = make([]string, 0, len(outMap))
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for k := range outMap {
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out = append(out, k)
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}
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return
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}
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// Prints the execution time of a function, not meant to be very
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// sensitive/accurate, but good enough to gauge rough run times.
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// Meant to be called as:
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//
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// defer misc.TimeFunc(time.Now(), "foo")
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func TimeFunc(start time.Time, name string) {
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elapsed := time.Since(start)
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log.Printf("%s completed in: %s", name, elapsed)
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}
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// Exists tests if the given file/dir exists or not. Returns any errors related
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// to os.Stat if the type is *not* ErrNotExist. If an error is returned, then
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// the value of the returned boolean cannot be trusted.
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func Exists(file string) (bool, error) {
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_, err := os.Stat(file)
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if err == nil {
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return true, nil
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} else if errors.Is(err, os.ErrNotExist) {
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// Don't return the error, the file doesn't exist which is OK
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return false, nil
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}
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// Other errors from os.Stat returned here
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return false, err
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}
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