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https://github.com/fnproject/fn.git
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51ff7caeb2
* add DateTime sans mgo * change all uses of strfmt.DateTime to common.DateTime, remove test strfmt usage * remove api tests, system-test dep on api test multiple reasons to remove the api tests: * awkward dependency with fn_go meant generating bindings on a branched fn to vendor those to test new stuff. this is at a minimum not at all intuitive, worth it, nor a fun way to spend the finite amount of time we have to live. * api tests only tested a subset of functionality that the server/ api tests already test, and we risk having tests where one tests some thing and the other doesn't. let's not. we have too many test suites as it is, and these pretty much only test that we updated the fn_go bindings, which is actually a hassle as noted above and the cli will pretty quickly figure out anyway. * fn_go relies on openapi, which relies on mgo, which is deprecated and we'd like to remove as a dependency. openapi is a _huge_ dep built in a NIH fashion, that cannot simply remove the mgo dep as users may be using it. we've now stolen their date time and otherwise killed usage of it in fn core, for fn_go it still exists but that's less of a problem. * update deps removals: * easyjson * mgo * go-openapi * mapstructure * fn_go * purell * go-validator also, had to lock docker. we shouldn't use docker on master anyway, they strongly advise against that. had no luck with latest version rev, so i locked it to what we were using before. until next time. the rest is just playing dep roulette, those end up removing a ton tho * fix exec test to work * account for john le cache
109 lines
2.9 KiB
Go
109 lines
2.9 KiB
Go
package units
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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)
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// See: http://en.wikipedia.org/wiki/Binary_prefix
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const (
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// Decimal
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KB = 1000
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MB = 1000 * KB
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GB = 1000 * MB
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TB = 1000 * GB
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PB = 1000 * TB
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// Binary
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KiB = 1024
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MiB = 1024 * KiB
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GiB = 1024 * MiB
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TiB = 1024 * GiB
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PiB = 1024 * TiB
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)
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type unitMap map[string]int64
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var (
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decimalMap = unitMap{"k": KB, "m": MB, "g": GB, "t": TB, "p": PB}
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binaryMap = unitMap{"k": KiB, "m": MiB, "g": GiB, "t": TiB, "p": PiB}
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sizeRegex = regexp.MustCompile(`^(\d+(\.\d+)*) ?([kKmMgGtTpP])?[iI]?[bB]?$`)
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)
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var decimapAbbrs = []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"}
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var binaryAbbrs = []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"}
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func getSizeAndUnit(size float64, base float64, _map []string) (float64, string) {
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i := 0
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unitsLimit := len(_map) - 1
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for size >= base && i < unitsLimit {
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size = size / base
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i++
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}
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return size, _map[i]
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}
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// CustomSize returns a human-readable approximation of a size
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// using custom format.
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func CustomSize(format string, size float64, base float64, _map []string) string {
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size, unit := getSizeAndUnit(size, base, _map)
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return fmt.Sprintf(format, size, unit)
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}
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// HumanSizeWithPrecision allows the size to be in any precision,
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// instead of 4 digit precision used in units.HumanSize.
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func HumanSizeWithPrecision(size float64, precision int) string {
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size, unit := getSizeAndUnit(size, 1000.0, decimapAbbrs)
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return fmt.Sprintf("%.*g%s", precision, size, unit)
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}
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// HumanSize returns a human-readable approximation of a size
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// capped at 4 valid numbers (eg. "2.746 MB", "796 KB").
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func HumanSize(size float64) string {
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return HumanSizeWithPrecision(size, 4)
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}
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// BytesSize returns a human-readable size in bytes, kibibytes,
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// mebibytes, gibibytes, or tebibytes (eg. "44kiB", "17MiB").
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func BytesSize(size float64) string {
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return CustomSize("%.4g%s", size, 1024.0, binaryAbbrs)
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}
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// FromHumanSize returns an integer from a human-readable specification of a
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// size using SI standard (eg. "44kB", "17MB").
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func FromHumanSize(size string) (int64, error) {
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return parseSize(size, decimalMap)
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}
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// RAMInBytes parses a human-readable string representing an amount of RAM
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// in bytes, kibibytes, mebibytes, gibibytes, or tebibytes and
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// returns the number of bytes, or -1 if the string is unparseable.
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// Units are case-insensitive, and the 'b' suffix is optional.
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func RAMInBytes(size string) (int64, error) {
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return parseSize(size, binaryMap)
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}
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// Parses the human-readable size string into the amount it represents.
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func parseSize(sizeStr string, uMap unitMap) (int64, error) {
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matches := sizeRegex.FindStringSubmatch(sizeStr)
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if len(matches) != 4 {
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return -1, fmt.Errorf("invalid size: '%s'", sizeStr)
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}
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size, err := strconv.ParseFloat(matches[1], 64)
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if err != nil {
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return -1, err
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}
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unitPrefix := strings.ToLower(matches[3])
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if mul, ok := uMap[unitPrefix]; ok {
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size *= float64(mul)
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}
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return int64(size), nil
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}
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