tabulate

使用启发式算法找到合适的列宽，以最小化浪费的空间，对齐列中的数据。适用于访问日志等文件，其中某些行的列宽度远大于其他行。

$ cat input.txt
aaa bbb ccc
a   b   c
aaaaaaaaaaaaaaaaaaaaaaa bb cc
aaaaa b ccccc
aaa bb ccc
aaaa bb cccc
aaa bb ccc
aaa bb ccc
aaaaa b ccccc
aaa bb ccc
aaa bb ccc
aaaaa b ccccc
$ tabulate <input.txt
aaa       bbb  ccc
a         b    c
aaaaaaaaaaaaaaaaaaaaaaa  bb  cc
aaaaa     b    ccccc
aaa       bb   ccc
aaaa      bb   cccc
aaa       bb   ccc
aaa       bb   ccc
aaaaa     b    ccccc
aaa       bb   ccc
aaa       bb   ccc
aaaaa     b    ccccc
$ tabulate -t <input.txt
aaa       bbb  ccc
a         b    c
aaaaaaa…  bb   cc
aaaaa     b    ccccc
aaa       bb   ccc
aaaa      bb   cccc
aaa       bb   ccc
aaa       bb   ccc
aaaaa     b    ccccc
aaa       bb   ccc
aaa       bb   ccc
aaaaa     b    ccccc

安装

cargo install tabulate

选项

Usage: tabulate [OPTIONS]

Options:
  -t, --truncate [<LIST>...]
          Truncate data that does not fit in a column. Takes an optional list of columns that should be
          truncated. If no LIST is given all columns are truncated
  -c, --compress-cols <RATIO>
          Number between 0.0 and 1.0 that controls how much columns are compressed. Set to 0 to disable
          column compression, i.e. columns are sized to fit the largest value [default: 1.0]
  -n, --estimate-count <N>
          Estimate column sizes from the first N lines. The value 0 means all lines [default: 1000]
  -i, --include <LIST>...
          Select which columns to include in the output
  -x, --exclude <LIST>...
          Select which columns should be excluded from the output. This option takes precedence over
          --include
  -d, --delimiter <DELIM>
          Use characters of DELIM as column delimiters [default: " \t"]
  -o, --output-delimiter <DELIM>
          Specify the delimiter to use to separate columns in the output [default: "  "]
  -s, --strict
          Parse columns as strictly being delimited by a single delimiter
      --online
          Print lines during column size estimation phase
      --column-info
          Print information about the columns
  -h, --help
          Print help information
  -V, --version
          Print version information

LIST should be a comma-separated list of ranges. Each range should be of one of the following forms:

  N       N'th column, starting at 1
  N-      from N'th column to end of line
  N-M     from N'th to M'th column
  -M      from first to M'th column