fixed dependencies

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nuknal
2024-10-24 15:46:01 +08:00
parent d16a5bd9c0
commit 1161e8d054
2005 changed files with 690883 additions and 0 deletions

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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof

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issues:
exclude-rules:
- path: _test\.go
linters:
- errcheck

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Changes
=======
v1.0.6 - 20 Apr 2022
[Miscellaneous]
* Minimum go version is now go 1.13
* github.com/pkg/errors is going to be phased out in steps. In this release,
users may opt-in to using native errors using `fmt.Errorf("%w")` by
specifying the tag `strftime_native_errors`. In the next release, the default
will be to use native errors, but users will be able to opt-in to using
github.com/pkg/errors using a tag. The version after will remove github.com/pkg/errors.
This is something that we normally would do over a major version upgrade
but since we do not expect this library to receive API breaking changes in the
near future and thus no v2 is expected, we have decided to do this over few
non-major releases.
v1.0.5
[New features]
* `(strftime.Strftime).FormatBuffer([]byte, time.Time) []byte` has been added.
This allows the user to provide the same underlying `[]byte` buffer for each
call to `FormatBuffer`, which avoid allocation per call.
* `%I` formatted midnight as `00`, where it should have been using `01`
before v1.0.4
Apparently we have failed to provide Changes prior to v1.0.5 :(

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MIT License
Copyright (c) 2016 lestrrat
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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.PHONY: bench realclean cover viewcover test lint
bench:
go test -tags bench -benchmem -bench .
@git checkout go.mod
@rm go.sum
realclean:
rm coverage.out
test:
go test -v -race ./...
cover:
ifeq ($(strip $(STRFTIME_TAGS)),)
go test -v -race -coverpkg=./... -coverprofile=coverage.out ./...
else
go test -v -tags $(STRFTIME_TAGS) -race -coverpkg=./... -coverprofile=coverage.out ./...
endif
viewcover:
go tool cover -html=coverage.out
lint:
golangci-lint run ./...
imports:
goimports -w ./

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# strftime
Fast strftime for Go
[![Build Status](https://travis-ci.org/lestrrat-go/strftime.png?branch=master)](https://travis-ci.org/lestrrat-go/strftime)
[![GoDoc](https://godoc.org/github.com/lestrrat-go/strftime?status.svg)](https://godoc.org/github.com/lestrrat-go/strftime)
# SYNOPSIS
```go
f, err := strftime.New(`.... pattern ...`)
if err := f.Format(buf, time.Now()); err != nil {
log.Println(err.Error())
}
```
# DESCRIPTION
The goals for this library are
* Optimized for the same pattern being called repeatedly
* Be flexible about destination to write the results out
* Be as complete as possible in terms of conversion specifications
# API
## Format(string, time.Time) (string, error)
Takes the pattern and the time, and formats it. This function is a utility function that recompiles the pattern every time the function is called. If you know beforehand that you will be formatting the same pattern multiple times, consider using `New` to create a `Strftime` object and reuse it.
## New(string) (\*Strftime, error)
Takes the pattern and creates a new `Strftime` object.
## obj.Pattern() string
Returns the pattern string used to create this `Strftime` object
## obj.Format(io.Writer, time.Time) error
Formats the time according to the pre-compiled pattern, and writes the result to the specified `io.Writer`
## obj.FormatString(time.Time) string
Formats the time according to the pre-compiled pattern, and returns the result string.
# SUPPORTED CONVERSION SPECIFICATIONS
| pattern | description |
|:--------|:------------|
| %A | national representation of the full weekday name |
| %a | national representation of the abbreviated weekday |
| %B | national representation of the full month name |
| %b | national representation of the abbreviated month name |
| %C | (year / 100) as decimal number; single digits are preceded by a zero |
| %c | national representation of time and date |
| %D | equivalent to %m/%d/%y |
| %d | day of the month as a decimal number (01-31) |
| %e | the day of the month as a decimal number (1-31); single digits are preceded by a blank |
| %F | equivalent to %Y-%m-%d |
| %H | the hour (24-hour clock) as a decimal number (00-23) |
| %h | same as %b |
| %I | the hour (12-hour clock) as a decimal number (01-12) |
| %j | the day of the year as a decimal number (001-366) |
| %k | the hour (24-hour clock) as a decimal number (0-23); single digits are preceded by a blank |
| %l | the hour (12-hour clock) as a decimal number (1-12); single digits are preceded by a blank |
| %M | the minute as a decimal number (00-59) |
| %m | the month as a decimal number (01-12) |
| %n | a newline |
| %p | national representation of either "ante meridiem" (a.m.) or "post meridiem" (p.m.) as appropriate. |
| %R | equivalent to %H:%M |
| %r | equivalent to %I:%M:%S %p |
| %S | the second as a decimal number (00-60) |
| %T | equivalent to %H:%M:%S |
| %t | a tab |
| %U | the week number of the year (Sunday as the first day of the week) as a decimal number (00-53) |
| %u | the weekday (Monday as the first day of the week) as a decimal number (1-7) |
| %V | the week number of the year (Monday as the first day of the week) as a decimal number (01-53) |
| %v | equivalent to %e-%b-%Y |
| %W | the week number of the year (Monday as the first day of the week) as a decimal number (00-53) |
| %w | the weekday (Sunday as the first day of the week) as a decimal number (0-6) |
| %X | national representation of the time |
| %x | national representation of the date |
| %Y | the year with century as a decimal number |
| %y | the year without century as a decimal number (00-99) |
| %Z | the time zone name |
| %z | the time zone offset from UTC |
| %% | a '%' |
# EXTENSIONS / CUSTOM SPECIFICATIONS
This library in general tries to be POSIX compliant, but sometimes you just need that
extra specification or two that is relatively widely used but is not included in the
POSIX specification.
For example, POSIX does not specify how to print out milliseconds,
but popular implementations allow `%f` or `%L` to achieve this.
For those instances, `strftime.Strftime` can be configured to use a custom set of
specifications:
```
ss := strftime.NewSpecificationSet()
ss.Set('L', ...) // provide implementation for `%L`
// pass this new specification set to the strftime instance
p, err := strftime.New(`%L`, strftime.WithSpecificationSet(ss))
p.Format(..., time.Now())
```
The implementation must implement the `Appender` interface, which is
```
type Appender interface {
Append([]byte, time.Time) []byte
}
```
For commonly used extensions such as the millisecond example and Unix timestamp, we provide a default
implementation so the user can do one of the following:
```
// (1) Pass a specification byte and the Appender
// This allows you to pass arbitrary Appenders
p, err := strftime.New(
`%L`,
strftime.WithSpecification('L', strftime.Milliseconds),
)
// (2) Pass an option that knows to use strftime.Milliseconds
p, err := strftime.New(
`%L`,
strftime.WithMilliseconds('L'),
)
```
Similarly for Unix Timestamp:
```
// (1) Pass a specification byte and the Appender
// This allows you to pass arbitrary Appenders
p, err := strftime.New(
`%s`,
strftime.WithSpecification('s', strftime.UnixSeconds),
)
// (2) Pass an option that knows to use strftime.UnixSeconds
p, err := strftime.New(
`%s`,
strftime.WithUnixSeconds('s'),
)
```
If a common specification is missing, please feel free to submit a PR
(but please be sure to be able to defend how "common" it is)
## List of available extensions
- [`Milliseconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#Milliseconds) (related option: [`WithMilliseconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#WithMilliseconds));
- [`Microseconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#Microseconds) (related option: [`WithMicroseconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#WithMicroseconds));
- [`UnixSeconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#UnixSeconds) (related option: [`WithUnixSeconds`](https://pkg.go.dev/github.com/lestrrat-go/strftime?tab=doc#WithUnixSeconds)).
# PERFORMANCE / OTHER LIBRARIES
The following benchmarks were run separately because some libraries were using cgo on specific platforms (notabley, the fastly version)
```
// On my OS X 10.14.6, 2.3 GHz Intel Core i5, 16GB memory.
// go version go1.13.4 darwin/amd64
hummingbird% go test -tags bench -benchmem -bench .
<snip>
BenchmarkTebeka-4 297471 3905 ns/op 257 B/op 20 allocs/op
BenchmarkJehiah-4 818444 1773 ns/op 256 B/op 17 allocs/op
BenchmarkFastly-4 2330794 550 ns/op 80 B/op 5 allocs/op
BenchmarkLestrrat-4 916365 1458 ns/op 80 B/op 2 allocs/op
BenchmarkLestrratCachedString-4 2527428 546 ns/op 128 B/op 2 allocs/op
BenchmarkLestrratCachedWriter-4 537422 2155 ns/op 192 B/op 3 allocs/op
PASS
ok github.com/lestrrat-go/strftime 25.618s
```
```
// On a host on Google Cloud Platform, machine-type: f1-micro (vCPU x 1, memory: 0.6GB)
// (Yes, I was being skimpy)
// Linux <snip> 4.9.0-11-amd64 #1 SMP Debian 4.9.189-3+deb9u1 (2019-09-20) x86_64 GNU/Linux
// go version go1.13.4 linux/amd64
hummingbird% go test -tags bench -benchmem -bench .
<snip>
BenchmarkTebeka 254997 4726 ns/op 256 B/op 20 allocs/op
BenchmarkJehiah 659289 1882 ns/op 256 B/op 17 allocs/op
BenchmarkFastly 389150 3044 ns/op 224 B/op 13 allocs/op
BenchmarkLestrrat 699069 1780 ns/op 80 B/op 2 allocs/op
BenchmarkLestrratCachedString 2081594 589 ns/op 128 B/op 2 allocs/op
BenchmarkLestrratCachedWriter 825763 1480 ns/op 192 B/op 3 allocs/op
PASS
ok github.com/lestrrat-go/strftime 11.355s
```
This library is much faster than other libraries *IF* you can reuse the format pattern.
Here's the annotated list from the benchmark results. You can clearly see that (re)using a `Strftime` object
and producing a string is the fastest. Writing to an `io.Writer` seems a bit sluggish, but since
the one producing the string is doing almost exactly the same thing, we believe this is purely the overhead of
writing to an `io.Writer`
| Import Path | Score | Note |
|:------------------------------------|--------:|:--------------------------------|
| github.com/lestrrat-go/strftime | 3000000 | Using `FormatString()` (cached) |
| github.com/fastly/go-utils/strftime | 2000000 | Pure go version on OS X |
| github.com/lestrrat-go/strftime | 1000000 | Using `Format()` (NOT cached) |
| github.com/jehiah/go-strftime | 1000000 | |
| github.com/fastly/go-utils/strftime | 1000000 | cgo version on Linux |
| github.com/lestrrat-go/strftime | 500000 | Using `Format()` (cached) |
| github.com/tebeka/strftime | 300000 | |
However, depending on your pattern, this speed may vary. If you find a particular pattern that seems sluggish,
please send in patches or tests.
Please also note that this benchmark only uses the subset of conversion specifications that are supported by *ALL* of the libraries compared.
Somethings to consider when making performance comparisons in the future:
* Can it write to io.Writer?
* Which `%specification` does it handle?

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package strftime
import (
"bytes"
"fmt"
"io"
"strconv"
"strings"
"time"
)
// These are all of the standard, POSIX compliant specifications.
// Extensions should be in extensions.go
var (
fullWeekDayName = StdlibFormat("Monday")
abbrvWeekDayName = StdlibFormat("Mon")
fullMonthName = StdlibFormat("January")
abbrvMonthName = StdlibFormat("Jan")
centuryDecimal = AppendFunc(appendCentury)
timeAndDate = StdlibFormat("Mon Jan _2 15:04:05 2006")
mdy = StdlibFormat("01/02/06")
dayOfMonthZeroPad = StdlibFormat("02")
dayOfMonthSpacePad = StdlibFormat("_2")
ymd = StdlibFormat("2006-01-02")
twentyFourHourClockZeroPad = &hourPadded{twelveHour: false, pad: '0'}
twelveHourClockZeroPad = &hourPadded{twelveHour: true, pad: '0'}
dayOfYear = AppendFunc(appendDayOfYear)
twentyFourHourClockSpacePad = &hourPadded{twelveHour: false, pad: ' '}
twelveHourClockSpacePad = &hourPadded{twelveHour: true, pad: ' '}
minutesZeroPad = StdlibFormat("04")
monthNumberZeroPad = StdlibFormat("01")
newline = Verbatim("\n")
ampm = StdlibFormat("PM")
hm = StdlibFormat("15:04")
imsp = hmsWAMPM{}
secondsNumberZeroPad = StdlibFormat("05")
hms = StdlibFormat("15:04:05")
tab = Verbatim("\t")
weekNumberSundayOrigin = weeknumberOffset(0) // week number of the year, Sunday first
weekdayMondayOrigin = weekday(1)
// monday as the first day, and 01 as the first value
weekNumberMondayOriginOneOrigin = AppendFunc(appendWeekNumber)
eby = StdlibFormat("_2-Jan-2006")
// monday as the first day, and 00 as the first value
weekNumberMondayOrigin = weeknumberOffset(1) // week number of the year, Monday first
weekdaySundayOrigin = weekday(0)
natReprTime = StdlibFormat("15:04:05") // national representation of the time XXX is this correct?
natReprDate = StdlibFormat("01/02/06") // national representation of the date XXX is this correct?
year = StdlibFormat("2006") // year with century
yearNoCentury = StdlibFormat("06") // year w/o century
timezone = StdlibFormat("MST") // time zone name
timezoneOffset = StdlibFormat("-0700") // time zone ofset from UTC
percent = Verbatim("%")
)
// Appender is the interface that must be fulfilled by components that
// implement the translation of specifications to actual time value.
//
// The Append method takes the accumulated byte buffer, and the time to
// use to generate the textual representation. The resulting byte
// sequence must be returned by this method, normally by using the
// append() builtin function.
type Appender interface {
Append([]byte, time.Time) []byte
}
// AppendFunc is an utility type to allow users to create a
// function-only version of an Appender
type AppendFunc func([]byte, time.Time) []byte
func (af AppendFunc) Append(b []byte, t time.Time) []byte {
return af(b, t)
}
type appenderList []Appender
type dumper interface {
dump(io.Writer)
}
func (l appenderList) dump(out io.Writer) {
var buf bytes.Buffer
ll := len(l)
for i, a := range l {
if dumper, ok := a.(dumper); ok {
dumper.dump(&buf)
} else {
fmt.Fprintf(&buf, "%#v", a)
}
if i < ll-1 {
fmt.Fprintf(&buf, ",\n")
}
}
if _, err := buf.WriteTo(out); err != nil {
panic(err)
}
}
// does the time.Format thing
type stdlibFormat struct {
s string
}
// StdlibFormat returns an Appender that simply goes through `time.Format()`
// For example, if you know you want to display the abbreviated month name for %b,
// you can create a StdlibFormat with the pattern `Jan` and register that
// for specification `b`:
//
// a := StdlibFormat(`Jan`)
// ss := NewSpecificationSet()
// ss.Set('b', a) // does %b -> abbreviated month name
func StdlibFormat(s string) Appender {
return &stdlibFormat{s: s}
}
func (v stdlibFormat) Append(b []byte, t time.Time) []byte {
return t.AppendFormat(b, v.s)
}
func (v stdlibFormat) str() string {
return v.s
}
func (v stdlibFormat) canCombine() bool {
return true
}
func (v stdlibFormat) combine(w combiner) Appender {
return StdlibFormat(v.s + w.str())
}
func (v stdlibFormat) dump(out io.Writer) {
fmt.Fprintf(out, "stdlib: %s", v.s)
}
type verbatimw struct {
s string
}
// Verbatim returns an Appender suitable for generating static text.
// For static text, this method is slightly favorable than creating
// your own appender, as adjacent verbatim blocks will be combined
// at compile time to produce more efficient Appenders
func Verbatim(s string) Appender {
return &verbatimw{s: s}
}
func (v verbatimw) Append(b []byte, _ time.Time) []byte {
return append(b, v.s...)
}
func (v verbatimw) canCombine() bool {
return canCombine(v.s)
}
func (v verbatimw) combine(w combiner) Appender {
if _, ok := w.(*stdlibFormat); ok {
return StdlibFormat(v.s + w.str())
}
return Verbatim(v.s + w.str())
}
func (v verbatimw) str() string {
return v.s
}
func (v verbatimw) dump(out io.Writer) {
fmt.Fprintf(out, "verbatim: %s", v.s)
}
// These words below, as well as any decimal character
var combineExclusion = []string{
"Mon",
"Monday",
"Jan",
"January",
"MST",
"PM",
"pm",
}
func canCombine(s string) bool {
if strings.ContainsAny(s, "0123456789") {
return false
}
for _, word := range combineExclusion {
if strings.Contains(s, word) {
return false
}
}
return true
}
type combiner interface {
canCombine() bool
combine(combiner) Appender
str() string
}
// this is container for the compiler to keep track of appenders,
// and combine them as we parse and compile the pattern
type combiningAppend struct {
list appenderList
prev Appender
prevCanCombine bool
}
func (ca *combiningAppend) Append(w Appender) {
if ca.prevCanCombine {
if wc, ok := w.(combiner); ok && wc.canCombine() {
ca.prev = ca.prev.(combiner).combine(wc)
ca.list[len(ca.list)-1] = ca.prev
return
}
}
ca.list = append(ca.list, w)
ca.prev = w
ca.prevCanCombine = false
if comb, ok := w.(combiner); ok {
if comb.canCombine() {
ca.prevCanCombine = true
}
}
}
func appendCentury(b []byte, t time.Time) []byte {
n := t.Year() / 100
if n < 10 {
b = append(b, '0')
}
return append(b, strconv.Itoa(n)...)
}
type weekday int
func (v weekday) Append(b []byte, t time.Time) []byte {
n := int(t.Weekday())
if n < int(v) {
n += 7
}
return append(b, byte(n+48))
}
type weeknumberOffset int
func (v weeknumberOffset) Append(b []byte, t time.Time) []byte {
yd := t.YearDay()
offset := int(t.Weekday()) - int(v)
if offset < 0 {
offset += 7
}
if yd < offset {
return append(b, '0', '0')
}
n := ((yd - offset) / 7) + 1
if n < 10 {
b = append(b, '0')
}
return append(b, strconv.Itoa(n)...)
}
func appendWeekNumber(b []byte, t time.Time) []byte {
_, n := t.ISOWeek()
if n < 10 {
b = append(b, '0')
}
return append(b, strconv.Itoa(n)...)
}
func appendDayOfYear(b []byte, t time.Time) []byte {
n := t.YearDay()
if n < 10 {
b = append(b, '0', '0')
} else if n < 100 {
b = append(b, '0')
}
return append(b, strconv.Itoa(n)...)
}
type hourPadded struct {
pad byte
twelveHour bool
}
func (v hourPadded) Append(b []byte, t time.Time) []byte {
h := t.Hour()
if v.twelveHour && h > 12 {
h = h - 12
}
if v.twelveHour && h == 0 {
h = 12
}
if h < 10 {
b = append(b, v.pad)
b = append(b, byte(h+48))
} else {
b = unrollTwoDigits(b, h)
}
return b
}
func unrollTwoDigits(b []byte, v int) []byte {
b = append(b, byte((v/10)+48))
b = append(b, byte((v%10)+48))
return b
}
type hmsWAMPM struct{}
func (v hmsWAMPM) Append(b []byte, t time.Time) []byte {
h := t.Hour()
var am bool
if h == 0 {
b = append(b, '1')
b = append(b, '2')
am = true
} else {
switch {
case h == 12:
// no op
case h > 12:
h = h - 12
default:
am = true
}
b = unrollTwoDigits(b, h)
}
b = append(b, ':')
b = unrollTwoDigits(b, t.Minute())
b = append(b, ':')
b = unrollTwoDigits(b, t.Second())
b = append(b, ' ')
if am {
b = append(b, 'A')
} else {
b = append(b, 'P')
}
b = append(b, 'M')
return b
}

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package strftime
import (
"strconv"
"time"
)
// NOTE: declare private variable and iniitalize once in init(),
// and leave the Milliseconds() function as returning static content.
// This way, `go doc -all` does not show the contents of the
// milliseconds function
var milliseconds Appender
var microseconds Appender
var unixseconds Appender
func init() {
milliseconds = AppendFunc(func(b []byte, t time.Time) []byte {
millisecond := int(t.Nanosecond()) / int(time.Millisecond)
if millisecond < 100 {
b = append(b, '0')
}
if millisecond < 10 {
b = append(b, '0')
}
return append(b, strconv.Itoa(millisecond)...)
})
microseconds = AppendFunc(func(b []byte, t time.Time) []byte {
microsecond := int(t.Nanosecond()) / int(time.Microsecond)
if microsecond < 100000 {
b = append(b, '0')
}
if microsecond < 10000 {
b = append(b, '0')
}
if microsecond < 1000 {
b = append(b, '0')
}
if microsecond < 100 {
b = append(b, '0')
}
if microsecond < 10 {
b = append(b, '0')
}
return append(b, strconv.Itoa(microsecond)...)
})
unixseconds = AppendFunc(func(b []byte, t time.Time) []byte {
return append(b, strconv.FormatInt(t.Unix(), 10)...)
})
}
// Milliseconds returns the Appender suitable for creating a zero-padded,
// 3-digit millisecond textual representation.
func Milliseconds() Appender {
return milliseconds
}
// Microsecond returns the Appender suitable for creating a zero-padded,
// 6-digit microsecond textual representation.
func Microseconds() Appender {
return microseconds
}
// UnixSeconds returns the Appender suitable for creating
// unix timestamp textual representation.
func UnixSeconds() Appender {
return unixseconds
}

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//go:build strftime_native_errors
// +build strftime_native_errors
package errors
import "fmt"
func New(s string) error {
return fmt.Errorf(s)
}
func Errorf(s string, args ...interface{}) error {
return fmt.Errorf(s, args...)
}
func Wrap(err error, s string) error {
return fmt.Errorf(s+`: %w`, err)
}

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//go:build !strftime_native_errors
// +build !strftime_native_errors
package errors
import "github.com/pkg/errors"
func New(s string) error {
return errors.New(s)
}
func Errorf(s string, args ...interface{}) error {
return errors.Errorf(s, args...)
}
func Wrap(err error, s string) error {
return errors.Wrap(err, s)
}

67
vendor/github.com/lestrrat-go/strftime/options.go generated vendored Normal file
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package strftime
type Option interface {
Name() string
Value() interface{}
}
type option struct {
name string
value interface{}
}
func (o *option) Name() string { return o.name }
func (o *option) Value() interface{} { return o.value }
const optSpecificationSet = `opt-specification-set`
// WithSpecification allows you to specify a custom specification set
func WithSpecificationSet(ds SpecificationSet) Option {
return &option{
name: optSpecificationSet,
value: ds,
}
}
type optSpecificationPair struct {
name byte
appender Appender
}
const optSpecification = `opt-specification`
// WithSpecification allows you to create a new specification set on the fly,
// to be used only for that invocation.
func WithSpecification(b byte, a Appender) Option {
return &option{
name: optSpecification,
value: &optSpecificationPair{
name: b,
appender: a,
},
}
}
// WithMilliseconds is similar to WithSpecification, and specifies that
// the Strftime object should interpret the pattern `%b` (where b
// is the byte that you specify as the argument)
// as the zero-padded, 3 letter milliseconds of the time.
func WithMilliseconds(b byte) Option {
return WithSpecification(b, Milliseconds())
}
// WithMicroseconds is similar to WithSpecification, and specifies that
// the Strftime object should interpret the pattern `%b` (where b
// is the byte that you specify as the argument)
// as the zero-padded, 3 letter microseconds of the time.
func WithMicroseconds(b byte) Option {
return WithSpecification(b, Microseconds())
}
// WithUnixSeconds is similar to WithSpecification, and specifies that
// the Strftime object should interpret the pattern `%b` (where b
// is the byte that you specify as the argument)
// as the unix timestamp in seconds
func WithUnixSeconds(b byte) Option {
return WithSpecification(b, UnixSeconds())
}

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package strftime
import (
"fmt"
"sync"
"github.com/lestrrat-go/strftime/internal/errors"
)
// because there is no such thing was a sync.RWLocker
type rwLocker interface {
RLock()
RUnlock()
sync.Locker
}
// SpecificationSet is a container for patterns that Strftime uses.
// If you want a custom strftime, you can copy the default
// SpecificationSet and tweak it
type SpecificationSet interface {
Lookup(byte) (Appender, error)
Delete(byte) error
Set(byte, Appender) error
}
type specificationSet struct {
mutable bool
lock rwLocker
store map[byte]Appender
}
// The default specification set does not need any locking as it is never
// accessed from the outside, and is never mutated.
var defaultSpecificationSet SpecificationSet
func init() {
defaultSpecificationSet = newImmutableSpecificationSet()
}
func newImmutableSpecificationSet() SpecificationSet {
// Create a mutable one so that populateDefaultSpecifications work through
// its magic, then copy the associated map
// (NOTE: this is done this way because there used to be
// two struct types for specification set, united under an interface.
// it can now be removed, but we would need to change the entire
// populateDefaultSpecifications method, and I'm currently too lazy
// PRs welcome)
tmp := NewSpecificationSet()
ss := &specificationSet{
mutable: false,
lock: nil, // never used, so intentionally not initialized
store: tmp.(*specificationSet).store,
}
return ss
}
// NewSpecificationSet creates a specification set with the default specifications.
func NewSpecificationSet() SpecificationSet {
ds := &specificationSet{
mutable: true,
lock: &sync.RWMutex{},
store: make(map[byte]Appender),
}
populateDefaultSpecifications(ds)
return ds
}
var defaultSpecifications = map[byte]Appender{
'A': fullWeekDayName,
'a': abbrvWeekDayName,
'B': fullMonthName,
'b': abbrvMonthName,
'C': centuryDecimal,
'c': timeAndDate,
'D': mdy,
'd': dayOfMonthZeroPad,
'e': dayOfMonthSpacePad,
'F': ymd,
'H': twentyFourHourClockZeroPad,
'h': abbrvMonthName,
'I': twelveHourClockZeroPad,
'j': dayOfYear,
'k': twentyFourHourClockSpacePad,
'l': twelveHourClockSpacePad,
'M': minutesZeroPad,
'm': monthNumberZeroPad,
'n': newline,
'p': ampm,
'R': hm,
'r': imsp,
'S': secondsNumberZeroPad,
'T': hms,
't': tab,
'U': weekNumberSundayOrigin,
'u': weekdayMondayOrigin,
'V': weekNumberMondayOriginOneOrigin,
'v': eby,
'W': weekNumberMondayOrigin,
'w': weekdaySundayOrigin,
'X': natReprTime,
'x': natReprDate,
'Y': year,
'y': yearNoCentury,
'Z': timezone,
'z': timezoneOffset,
'%': percent,
}
func populateDefaultSpecifications(ds SpecificationSet) {
for c, handler := range defaultSpecifications {
if err := ds.Set(c, handler); err != nil {
panic(fmt.Sprintf("failed to set default specification for %c: %s", c, err))
}
}
}
func (ds *specificationSet) Lookup(b byte) (Appender, error) {
if ds.mutable {
ds.lock.RLock()
defer ds.lock.RLock()
}
v, ok := ds.store[b]
if !ok {
return nil, errors.Errorf(`lookup failed: '%%%c' was not found in specification set`, b)
}
return v, nil
}
func (ds *specificationSet) Delete(b byte) error {
if !ds.mutable {
return errors.New(`delete failed: this specification set is marked immutable`)
}
ds.lock.Lock()
defer ds.lock.Unlock()
delete(ds.store, b)
return nil
}
func (ds *specificationSet) Set(b byte, a Appender) error {
if !ds.mutable {
return errors.New(`set failed: this specification set is marked immutable`)
}
ds.lock.Lock()
defer ds.lock.Unlock()
ds.store[b] = a
return nil
}

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vendor/github.com/lestrrat-go/strftime/strftime.go generated vendored Normal file
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package strftime
import (
"io"
"strings"
"sync"
"time"
"github.com/lestrrat-go/strftime/internal/errors"
)
type compileHandler interface {
handle(Appender)
}
// compile, and create an appender list
type appenderListBuilder struct {
list *combiningAppend
}
func (alb *appenderListBuilder) handle(a Appender) {
alb.list.Append(a)
}
// compile, and execute the appenders on the fly
type appenderExecutor struct {
t time.Time
dst []byte
}
func (ae *appenderExecutor) handle(a Appender) {
ae.dst = a.Append(ae.dst, ae.t)
}
func compile(handler compileHandler, p string, ds SpecificationSet) error {
for l := len(p); l > 0; l = len(p) {
// This is a really tight loop, so we don't even calls to
// Verbatim() to cuase extra stuff
var verbatim verbatimw
i := strings.IndexByte(p, '%')
if i < 0 {
verbatim.s = p
handler.handle(&verbatim)
// this is silly, but I don't trust break keywords when there's a
// possibility of this piece of code being rearranged
p = p[l:]
continue
}
if i == l-1 {
return errors.New(`stray % at the end of pattern`)
}
// we found a '%'. we need the next byte to decide what to do next
// we already know that i < l - 1
// everything up to the i is verbatim
if i > 0 {
verbatim.s = p[:i]
handler.handle(&verbatim)
p = p[i:]
}
specification, err := ds.Lookup(p[1])
if err != nil {
return errors.Wrap(err, `pattern compilation failed`)
}
handler.handle(specification)
p = p[2:]
}
return nil
}
func getSpecificationSetFor(options ...Option) (SpecificationSet, error) {
var ds SpecificationSet = defaultSpecificationSet
var extraSpecifications []*optSpecificationPair
for _, option := range options {
switch option.Name() {
case optSpecificationSet:
ds = option.Value().(SpecificationSet)
case optSpecification:
extraSpecifications = append(extraSpecifications, option.Value().(*optSpecificationPair))
}
}
if len(extraSpecifications) > 0 {
// If ds is immutable, we're going to need to create a new
// one. oh what a waste!
if raw, ok := ds.(*specificationSet); ok && !raw.mutable {
ds = NewSpecificationSet()
}
for _, v := range extraSpecifications {
if err := ds.Set(v.name, v.appender); err != nil {
return nil, err
}
}
}
return ds, nil
}
var fmtAppendExecutorPool = sync.Pool{
New: func() interface{} {
var h appenderExecutor
h.dst = make([]byte, 0, 32)
return &h
},
}
func getFmtAppendExecutor() *appenderExecutor {
return fmtAppendExecutorPool.Get().(*appenderExecutor)
}
func releasdeFmtAppendExecutor(v *appenderExecutor) {
// TODO: should we discard the buffer if it's too long?
v.dst = v.dst[:0]
fmtAppendExecutorPool.Put(v)
}
// Format takes the format `s` and the time `t` to produce the
// format date/time. Note that this function re-compiles the
// pattern every time it is called.
//
// If you know beforehand that you will be reusing the pattern
// within your application, consider creating a `Strftime` object
// and reusing it.
func Format(p string, t time.Time, options ...Option) (string, error) {
// TODO: this may be premature optimization
ds, err := getSpecificationSetFor(options...)
if err != nil {
return "", errors.Wrap(err, `failed to get specification set`)
}
h := getFmtAppendExecutor()
defer releasdeFmtAppendExecutor(h)
h.t = t
if err := compile(h, p, ds); err != nil {
return "", errors.Wrap(err, `failed to compile format`)
}
return string(h.dst), nil
}
// Strftime is the object that represents a compiled strftime pattern
type Strftime struct {
pattern string
compiled appenderList
}
// New creates a new Strftime object. If the compilation fails, then
// an error is returned in the second argument.
func New(p string, options ...Option) (*Strftime, error) {
// TODO: this may be premature optimization
ds, err := getSpecificationSetFor(options...)
if err != nil {
return nil, errors.Wrap(err, `failed to get specification set`)
}
var h appenderListBuilder
h.list = &combiningAppend{}
if err := compile(&h, p, ds); err != nil {
return nil, errors.Wrap(err, `failed to compile format`)
}
return &Strftime{
pattern: p,
compiled: h.list.list,
}, nil
}
// Pattern returns the original pattern string
func (f *Strftime) Pattern() string {
return f.pattern
}
// Format takes the destination `dst` and time `t`. It formats the date/time
// using the pre-compiled pattern, and outputs the results to `dst`
func (f *Strftime) Format(dst io.Writer, t time.Time) error {
const bufSize = 64
var b []byte
max := len(f.pattern) + 10
if max < bufSize {
var buf [bufSize]byte
b = buf[:0]
} else {
b = make([]byte, 0, max)
}
if _, err := dst.Write(f.format(b, t)); err != nil {
return err
}
return nil
}
// FormatBuffer is equivalent to Format, but appends the result directly to
// supplied slice dst, returning the updated slice. This avoids any internal
// memory allocation.
func (f *Strftime) FormatBuffer(dst []byte, t time.Time) []byte {
return f.format(dst, t)
}
// Dump outputs the internal structure of the formatter, for debugging purposes.
// Please do NOT assume the output format to be fixed: it is expected to change
// in the future.
func (f *Strftime) Dump(out io.Writer) {
f.compiled.dump(out)
}
func (f *Strftime) format(b []byte, t time.Time) []byte {
for _, w := range f.compiled {
b = w.Append(b, t)
}
return b
}
// FormatString takes the time `t` and formats it, returning the
// string containing the formated data.
func (f *Strftime) FormatString(t time.Time) string {
const bufSize = 64
var b []byte
max := len(f.pattern) + 10
if max < bufSize {
var buf [bufSize]byte
b = buf[:0]
} else {
b = make([]byte, 0, max)
}
return string(f.format(b, t))
}