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517dc6d39e
cc/ @fdncred # Description in the examples of `std bench` there is an expanded table without explicitely expanding it... this PR adds a `table -e` to the `std bench` call in the example. # User-Facing Changes the help page of `std bench` now does make sense 😌 # Tests + Formatting - 🟢 `toolkit fmt` - 🟢 `toolkit clippy` - ⚫ `toolkit test` - ⚫ `toolkit test stdlib` # After Submitting ``` $nothing ```
227 lines
7.6 KiB
Plaintext
227 lines
7.6 KiB
Plaintext
# std.nu, `used` to load all standard library components
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export use dirs *
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export-env {
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use dirs *
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}
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export use help *
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export use iter *
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export use log *
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export use testing *
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export use xml *
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# Add the given paths to the PATH.
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#
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# # Example
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# - adding some dummy paths to an empty PATH
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# ```nushell
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# >_ with-env [PATH []] {
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# std path add "foo"
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# std path add "bar" "baz"
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# std path add "fooo" --append
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#
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# assert equal $env.PATH ["bar" "baz" "foo" "fooo"]
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#
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# print (std path add "returned" --ret)
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# }
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# ╭───┬──────────╮
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# │ 0 │ returned │
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# │ 1 │ bar │
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# │ 2 │ baz │
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# │ 3 │ foo │
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# │ 4 │ fooo │
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# ╰───┴──────────╯
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# ```
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export def-env "path add" [
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--ret (-r) # return $env.PATH, useful in pipelines to avoid scoping.
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--append (-a) # append to $env.PATH instead of prepending to.
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...paths # the paths to add to $env.PATH.
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] {
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let-env PATH = (
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$env.PATH
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| if $append { append $paths }
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else { prepend $paths }
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)
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if $ret {
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$env.PATH
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}
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}
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# print a command name as dimmed and italic
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def pretty-command [] {
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let command = $in
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return $"(ansi default_dimmed)(ansi default_italic)($command)(ansi reset)"
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}
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# give a hint error when the clip command is not available on the system
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def check-clipboard [
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clipboard: string # the clipboard command name
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--system: string # some information about the system running, for better error
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] {
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if (which $clipboard | is-empty) {
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error make --unspanned {
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msg: $"(ansi red)clipboard_not_found(ansi reset):
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you are running ($system)
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but
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the ($clipboard | pretty-command) clipboard command was not found on your system."
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}
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}
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}
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# put the end of a pipe into the system clipboard.
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#
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# Dependencies:
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# - xclip on linux x11
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# - wl-copy on linux wayland
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# - clip.exe on windows
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#
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# Examples:
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# put a simple string to the clipboard, will be stripped to remove ANSI sequences
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# >_ "my wonderful string" | clip
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# my wonderful string
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# saved to clipboard (stripped)
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#
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# put a whole table to the clipboard
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# >_ ls *.toml | clip
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# ╭───┬─────────────────────┬──────┬────────┬───────────────╮
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# │ # │ name │ type │ size │ modified │
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# ├───┼─────────────────────┼──────┼────────┼───────────────┤
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# │ 0 │ Cargo.toml │ file │ 5.0 KB │ 3 minutes ago │
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# │ 1 │ Cross.toml │ file │ 363 B │ 2 weeks ago │
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# │ 2 │ rust-toolchain.toml │ file │ 1.1 KB │ 2 weeks ago │
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# ╰───┴─────────────────────┴──────┴────────┴───────────────╯
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#
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# saved to clipboard
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#
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# put huge structured data in the clipboard, but silently
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# >_ open Cargo.toml --raw | from toml | clip --silent
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#
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# when the clipboard system command is not installed
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# >_ "mm this is fishy..." | clip
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# Error:
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# × clipboard_not_found:
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# │ you are using xorg on linux
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# │ but
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# │ the xclip clipboard command was not found on your system.
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export def clip [
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--silent: bool # do not print the content of the clipboard to the standard output
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--no-notify: bool # do not throw a notification (only on linux)
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--expand (-e): bool # auto-expand the data given as input
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] {
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let input = (
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$in
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| if $expand { table --expand } else { table }
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| into string
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| ansi strip
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)
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match $nu.os-info.name {
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"linux" => {
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if ($env.WAYLAND_DISPLAY? | is-empty) {
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check-clipboard xclip --system $"('xorg' | pretty-command) on linux"
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$input | xclip -sel clip
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} else {
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check-clipboard wl-copy --system $"('wayland' | pretty-command) on linux"
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$input | wl-copy
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}
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},
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"windows" => {
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chcp 65001 # see https://discord.com/channels/601130461678272522/601130461678272524/1085535756237426778
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check-clipboard clip.exe --system $"('xorg' | pretty-command) on linux"
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$input | clip.exe
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},
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"macos" => {
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check-clipboard pbcopy --system macOS
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$input | pbcopy
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},
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_ => {
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error make --unspanned {
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msg: $"(ansi red)unknown_operating_system(ansi reset):
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'($nu.os-info.name)' is not supported by the ('clip' | pretty-command) command.
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please open a feature request in the [issue tracker](char lparen)https://github.com/nushell/nushell/issues/new/choose(char rparen) to add your operating system to the standard library."
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}
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},
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}
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if not $silent {
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print $input
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print $"(ansi white_italic)(ansi white_dimmed)saved to clipboard(ansi reset)"
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}
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if (not $no_notify) and ($nu.os-info.name == linux) {
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notify-send "std clip" "saved to clipboard"
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}
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}
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# convert an integer amount of nanoseconds to a real duration
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def "from ns" [] {
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[$in "ns"] | str join | into duration
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}
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# run a piece of `nushell` code multiple times and measure the time of execution.
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#
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# this command returns a benchmark report of the following form:
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# ```
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# record<
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# mean: duration
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# std: duration
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# times: list<duration>
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# >
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# ```
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#
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# > **Note**
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# > `std bench --pretty` will return a `string`.
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#
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# # Examples
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# measure the performance of simple addition
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# > std bench { 1 + 2 } -n 10 | table -e
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# ╭───────┬────────────────────╮
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# │ mean │ 4µs 956ns │
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# │ std │ 4µs 831ns │
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# │ │ ╭───┬────────────╮ │
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# │ times │ │ 0 │ 19µs 402ns │ │
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# │ │ │ 1 │ 4µs 322ns │ │
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# │ │ │ 2 │ 3µs 352ns │ │
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# │ │ │ 3 │ 2µs 966ns │ │
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# │ │ │ 4 │ 3µs │ │
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# │ │ │ 5 │ 3µs 86ns │ │
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# │ │ │ 6 │ 3µs 84ns │ │
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# │ │ │ 7 │ 3µs 604ns │ │
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# │ │ │ 8 │ 3µs 98ns │ │
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# │ │ │ 9 │ 3µs 653ns │ │
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# │ │ ╰───┴────────────╯ │
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# ╰───────┴────────────────────╯
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#
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# get a pretty benchmark report
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# > std bench { 1 + 2 } --pretty
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# 3µs 125ns +/- 2µs 408ns
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export def bench [
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code: closure # the piece of `nushell` code to measure the performance of
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--rounds (-n): int = 50 # the number of benchmark rounds (hopefully the more rounds the less variance)
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--verbose (-v): bool # be more verbose (namely prints the progress)
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--pretty: bool # shows the results in human-readable format: "<mean> +/- <stddev>"
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] {
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let times = (
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seq 1 $rounds | each {|i|
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if $verbose { print -n $"($i) / ($rounds)\r" }
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timeit { do $code } | into int | into decimal
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}
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)
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if $verbose { print $"($rounds) / ($rounds)" }
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let report = {
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mean: ($times | math avg | from ns)
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std: ($times | math stddev | from ns)
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times: ($times | each { from ns })
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}
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if $pretty {
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$"($report.mean) +/- ($report.std)"
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} else {
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$report
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}
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}
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