gem-hunter

Rust crate for printing tables on command line.

Add cli-table in your Cargo.toml's dependencies section

[dependencies]
cli-table = "0.5"

use cli_table::{format::Justify, print_stdout, Cell, Style, Table};

let table = vec![
    vec!["Tom".cell(), 10.cell().justify(Justify::Right)],
    vec!["Jerry".cell(), 15.cell().justify(Justify::Right)],
    vec!["Scooby Doo".cell(), 20.cell().justify(Justify::Right)],
]
.table()
.title(vec![
    "Name".cell().bold(true),
    "Age (in years)".cell().bold(true),
])
.bold(true);

assert!(print_stdout(table).is_ok());

Below is the output of the table we created just now:

+------------+----------------+
| Name       | Age (in years) |  <-- This row and all the borders/separators
+------------+----------------+      will appear in bold
| Tom        |             10 |
+------------+----------------+
| Jerry      |             15 |
+------------+----------------+
| Scooby Doo |             25 |
+------------+----------------+

To get a Display trait implementation of TableStruct, use display() function on the struct to get an instance of TableDisplay which implements Display trait.

use cli_table::{format::Justify, Cell, Style, Table};

let table = vec![
    vec!["Tom".cell(), 10.cell().justify(Justify::Right)],
    vec!["Jerry".cell(), 15.cell().justify(Justify::Right)],
    vec!["Scooby Doo".cell(), 20.cell().justify(Justify::Right)],
]
.table()
.title(vec![
    "Name".cell().bold(true),
    "Age (in years)".cell().bold(true),
])
.bold(true);

let table_display = table.display().unwrap();

println!("{}", table_display);

Below is the output of the table we created just now:

+------------+----------------+
| Name       | Age (in years) |  <-- This row and all the borders/separators
+------------+----------------+      will appear in bold
| Tom        |             10 |
+------------+----------------+
| Jerry      |             15 |
+------------+----------------+
| Scooby Doo |             25 |
+------------+----------------+

#[derive(Table)] can also be used to print a Vec or slice of structs as table.

use cli_table::{format::Justify, print_stdout, Table, WithTitle};

#[derive(Table)]
struct User {
    #[table(title = "ID", justify = "Justify::Right")]
    id: u64,
    #[table(title = "First Name")]
    first_name: &'static str,
    #[table(title = "Last Name")]
    last_name: &'static str,
}

let users = vec![
    User {
        id: 1,
        first_name: "Scooby",
        last_name: "Doo",
    },
    User {
        id: 2,
        first_name: "John",
        last_name: "Cena",
    },
];

assert!(print_stdout(users.with_title()).is_ok());

Below is the output of the table we created using derive macro:

+----+------------+-----------+
| ID | First Name | Last Name |  <-- This row will appear in bold
+----+------------+-----------+
|  1 | Scooby     | Doo       |
+----+------------+-----------+
|  2 | John       | Cena      |
+----+------------+-----------+

• title | name: Used to specify title of a column. Usage: #[table(title = "Title")]
• justify: Used to horizontally justify the contents of a column. Usage: #[table(justify = "Justify::Right")]
• align: Used to vertically align the contents of a column. Usage: #[table(align = "Align::Top")]
• color: Used to specify color of contents of a column. Usage: #[table(color = "Color::Red")]
• bold: Used to specify boldness of contents of a column. Usage: #[table(bold)]
• order: Used to order columns in a table while printing. Usage: #[table(order = <usize>)]. Here, columns will be sorted based on their order. For e.g., column with order = 0 will be displayed on the left followed by column with order = 1 and so on.
• display_fn: Used to print types which do not implement Display trait. Usage #[table(display_fn = "<func_name>")]. Signature of provided function should be fn <func_name>(value: &<type>) -> impl Display.
• customize_fn: Used to customize style of a cell. Usage #[table(customize_fn = "<func_name>")]. Signature of provided function should be fn <func_name>(cell: CellStruct, value: &<type>) -> CellStruct. This attribute can be used when you want to change the formatting/style of a cell based on its contents. Note that this will overwrite all the style settings done by other attributes.
• skip: Used to skip a field from table. Usage: #[table(skip)]

For more information on configurations available on derive macro, go to cli-table/examples/struct.rs.

This crate also integrates with csv crate. On enabling "csv" feature, you can use TryFrom<&mut Reader> for TableStruct trait implementation to convert csv::Reader to TableStruct.

For more information on handling CSV values, go to cli-table/examples/csv.rs.

Style of a table/cell can be modified by calling functions of [Style] trait. It is implementated by both [TableStruct] and [CellStruct].

For individually formatting each cell of a table, justify, align and padding functions can be used from CellStruct.

In addition to this, borders and separators of a table can be customized by calling border and separator functions in TableStruct. For example, to create a borderless table:

use cli_table::{Cell, Table, TableStruct, format::{Justify, Border}, print_stdout};

fn get_table() -> TableStruct {
    vec![
        vec!["Tom".cell(), 10.cell().justify(Justify::Right)],
        vec!["Jerry".cell(), 15.cell().justify(Justify::Right)],
        vec!["Scooby Doo".cell(), 20.cell().justify(Justify::Right)],
    ]
    .table()
}

let table = get_table().border(Border::builder().build()); // Attaches an empty border to the table
assert!(print_stdout(table).is_ok());

• derive: Enables derive macro for creating tables using structs. Enabled by default.
• csv: Enables support for printing tables using csv. Enabled by default.

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE)
• MIT license (LICENSE-MIT)

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.