cli

Helpers for Developing Command Line Interfaces

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It integrates well with crayon for coloring the boxes or their content, It can draw rules and boxes to make headers or footers in console output, and tree structures. It includes a set of Unicode characters, with fallbacks on systems that do not support them.



Installation

Install the stable version from CRAN:

install.packages("cli")

Install the development version from GitHub:

source("https://install-github.me/r-lib/cli")

Usage

library(cli)

Unicode characters

Inspired by (and mostly copied from) the figures JavaScript project.

#> ✔    tick                      ☐ checkbox_off           
#> ✖    cross                     ⓧ checkbox_circle_on     
#> ★    star                      Ⓘ checkbox_circle_off    
#> ▇    square                    ❓ fancy_question_mark    
#> ◻    square_small              ≠ neq                    
#> ◼    square_small_filled       ≥ geq                    
#> ◯    circle                    ≤ leq                    
#> ◉    circle_filled             × times                  
#> ◌    circle_dotted             ▔ upper_block_1          
#> ◎    circle_double             ▀ upper_block_4          
#> ⓞ    circle_circle             ▁ lower_block_1          
#> ⓧ    circle_cross              ▂ lower_block_2          
#> Ⓘ    circle_pipe               ▃ lower_block_3          
#> ?⃝   circle_question_mark      ▄ lower_block_4          
#> ●    bullet                    ▅ lower_block_5          
#> ․    dot                       ▆ lower_block_6          
#> ─    line                      ▇ lower_block_7          
#> ═    double_line               █ lower_block_8          
#> …    ellipsis                  █ full_block             
#> …    continue                  ⁰ sup_0                  
#> ❯    pointer                   ¹ sup_1                  
#> ℹ    info                      ² sup_2                  
#> ⚠    warning                   ³ sup_3                  
#> ☰    menu                      ⁴ sup_4                  
#> ☺    smiley                    ⁵ sup_5                  
#> ෴    mustache                  ⁶ sup_6                  
#> ♥    heart                     ⁷ sup_7                  
#> ↑    arrow_up                  ⁸ sup_8                  
#> ↓    arrow_down                ⁹ sup_9                  
#> ←    arrow_left                ⁻ sup_minus              
#> →    arrow_right               ⁺ sup_plus               
#> ◉    radio_on                  ▶ play                   
#> ◯    radio_off                 ■ stop                   
#> ☒    checkbox_on               ● record

Spinners

See list_spinners() and get_spinner(). From the awesome cli-spinners project.

Rules

Simple rule

rule()

Double rule

rule(line = 2)

Bars

rule(line = "bar2")

rule(line = "bar5")

Left label

rule(left = "Results")

Centered label

rule(center = " * RESULTS * ")

Colored labels

rule(center = crayon::red(" * RESULTS * "))

Colored label and line

rule(center = " * RESULTS * ", col = "red")

Colored line

rule(center = " * RESULTS * ", line_col = "red")

Custom line

rule(center = "TITLE", line = "~")

More custom line

rule(center = "TITLE", line = "~-", line_col = "blue")

Even more custom line

rule(center = crayon::bgRed(" ", symbol$star, "TITLE", symbol$star, " "),
  line = "\u2582", line_col = "orange")

Boxes

Default box

boxx("Hello there!")

Change border style

boxx("Hello there!", border_style = "double")

Multiple lines

boxx(c("Hello", "there!"), padding = 1)

Padding

boxx("Hello there!", padding = 1)

boxx("Hello there!", padding = c(1, 5, 1, 5))

Margin

boxx("Hello there!", margin = 1)

boxx("Hello there!", margin = c(1, 5, 1, 5))

boxx("Hello there!", padding = 1, margin = c(1, 5, 1, 5))

Floating

boxx("Hello there!", padding = 1, float = "center")

boxx("Hello there!", padding = 1, float = "right")

Text color

boxx(crayon::cyan("Hello there!"), padding = 1, float = "center")

Backgorund color

boxx("Hello there!", padding = 1, background_col = "brown")

boxx("Hello there!", padding = 1, background_col = crayon::bgRed)

Border color

boxx("Hello there!", padding = 1, border_col = "green")

boxx("Hello there!", padding = 1, border_col = crayon::red)

Label alignment

boxx(c("Hi", "there", "you!"), padding = 1, align = "left")

boxx(c("Hi", "there", "you!"), padding = 1, align = "center")

boxx(c("Hi", "there", "you!"), padding = 1, align = "right")

A very customized box

star <- symbol$star
label <- c(paste(star, "Hello", star), "  there!")
boxx(
  crayon::white(label),
  border_style="round",
  padding = 1,
  float = "center",
  border_col = "tomato3",
  background_col="darkolivegreen"
)

Trees

You can specify the tree with a two column data frame, containing the node ids/labels, and the list of their children.

data <- data.frame(
  stringsAsFactors = FALSE,
  package = c("processx", "backports", "assertthat", "Matrix",
    "magrittr", "rprojroot", "clisymbols", "prettyunits", "withr",
    "desc", "igraph", "R6", "crayon", "debugme", "digest", "irlba",
    "rcmdcheck", "callr", "pkgconfig", "lattice"),
  dependencies = I(list(
    c("assertthat", "crayon", "debugme", "R6"), character(0),
    character(0), "lattice", character(0), "backports", character(0),
    c("magrittr", "assertthat"), character(0),
    c("assertthat", "R6", "crayon", "rprojroot"),
    c("irlba", "magrittr", "Matrix", "pkgconfig"), character(0),
    character(0), "crayon", character(0), "Matrix",
    c("callr", "clisymbols", "crayon", "desc", "digest", "prettyunits",
      "R6", "rprojroot", "withr"),
    c("processx", "R6"), character(0), character(0)
  ))
)
tree(data, root = "rcmdcheck")

An optional third column may contain custom labels. These can be colored as well:

data$label <- paste(data$package,
  crayon::blurred(paste0("(", c("2.0.0.1", "1.1.1", "0.2.0", "1.2-11",
    "1.5", "1.2", "1.2.0", "1.0.2", "2.0.0", "1.1.1.9000", "1.1.2",
    "2.2.2", "1.3.4", "1.0.2", "0.6.12", "2.2.1", "1.2.1.9002",
    "1.0.0.9000", "2.0.1", "0.20-35"), ")"))
  )
roots <- ! data$package %in% unlist(data$dependencies)
data$label[roots] <- crayon::cyan(crayon::italic(data$label[roots]))
tree(data, root = "rcmdcheck")

License

MIT © RStudio