inslice

从文本块中提取特定的列和行是命令行中常见的一个任务，无论是从文件还是标准输入。然而，目前的方法，如 awk 或 tail，并不是最直接或直观的，特别是它们通常需要特殊的语法或调用才能完成所需任务。

inslice 是一个用 Rust 编写的命令行工具，旨在解决这个问题，通过允许用户以文字和明确的方式使用列号和行号轻松地按列和行过滤输入文本。它由两个独立的二进制文件组成，分别是 colslc 和 rowslc，分别用于列和行，可以一起使用以生成所需的输出。这遵循 Unix 哲学，即编写只做一件事并且做得很好的程序，并且可以一起工作。

要了解与现有等效命令的相似之处，请参阅比较。

安装

预构建的二进制文件

可以在本仓库的 发行版 部分找到为各种目标平台编译的预构建 colslc 和 rowslc 二进制文件。

Cargo

使用 cargo 工具链安装 colslc 和 rowslc

cargo install inslice

用法

colslc

colslc 1.0.0

Jace Tan <jaceys.tan@gmail.com>

A command-line utility for filtering input text by columns and writing them to standard output

USAGE:
    colslc [OPTIONS] [--] [PATH]

ARGS:
    <PATH>
            Path to input file. To read from standard input, specify - as the path. If no path is
            provided, the default behaviour will be to read from standard input

FLAGS:
    -h, --help
            Print help information

    -V, --version
            Print version information

OPTIONS:
    -d, --delimiter <DELIMITER>
            Optional delimiter to use for splitting input text into columns. If no delimiter is
            provided, the default behaviour will be to split by any amount of whitespace

    -f, --filters <FILTERS>...
            Filters to be applied, using column numbers to denote which columns from the input text
            should be retained. Multiple filters can be applied, the result of which is their union.
            The following are accepted formats for filters, with column indexing starting from one,
            beginning from the left-most column:
            
            * [n] - an exact filter for selecting the n'th column
            
            * [n:m] - a range-based filter for selecting the n'th to m'th (inclusive) columns
            
            * [n:] - a range-based filter for selecting the n'th to last (inclusive) columns
            
            * [:n] - a range-based filter for selecting the first to n'th (inclusive) columns
            
            * [:n] - a range-based filter for selecting the first to last (inclusive) columns
            
            Example:
            
            `colslc - -f 1 4:6` will result in the 1st, 4th, 5th, and 6th columns of the input text
            provided from standard input being written to standard output, separated by whitespace.

rowslc

rowslc 1.0.0

Jace Tan <jaceys.tan@gmail.com>

A command-line utility for filtering input text by rows and writing them to standard output

USAGE:
    rowslc [OPTIONS] [--] [PATH]

ARGS:
    <PATH>
            Path to input file. To read from standard input, specify - as the path. If no path is
            provided, the default behaviour will be to read from standard input

FLAGS:
    -h, --help
            Print help information

    -V, --version
            Print version information

OPTIONS:
    -f, --filters <FILTERS>...
            Filters to be applied, using row numbers to denote which rows from the input text should
            be retained. Multiple filters can be applied, the result of which is their union. The
            following are accepted formats for filters, with row indexing starting from one,
            beginning from the top-most row:
            
            * [n] - an exact filter for selecting the n'th row
            
            * [n:m] - a range-based filter for selecting the n'th to m'th (inclusive) rows
            
            * [n:] - a range-based filter for selecting the n'th to last (inclusive) rows
            
            * [:n] - a range-based filter for selecting the first to n'th (inclusive) rows
            
            * [:n] - a range-based filter for selecting the first to last (inclusive) rows
            
            Example:
            
            `rowslc - -f 1 4:6` will result in the 1st, 4th, 5th, and 6th rows of the input text
            provided from standard input being written to standard output, separated by a newline.

比较

对于给定的输入文件

$ cat src/testdata/input.txt
REPOSITORY   TAG           IMAGE ID       CREATED         SIZE
vault        1.8.4         dc15db720d79   2 days ago      186MB
redis        6.2-alpine    6960a2858b36   3 days ago      31.3MB
postgres     14.0-alpine   ae192c4d3ada   17 months ago   152MB
traefik      2.5           72bfc37343a4   18 months ago   68.9MB

colslc

awk

cat src/testdata/input.txt | awk '{ print $1, $4, $5, $6}'

等同于

cat src/testdata/input.txt | colslc -f 1 4:6

rowslc

head

cat src/testdata/input.txt | head -3

等同于

cat src/testdata/input.txt | rowslc -f :3

tail

cat src/testdata/input.txt | tail +3

等同于

cat src/testdata/input.txt | rowslc -f 3:

head + tail

cat src/testdata/input.txt | head -3 | tail +3

等同于

cat src/testdata/input.txt | rowslc -f 3

许可证

请参阅LICENSE。