45 lines
1.6 KiB
Markdown
45 lines
1.6 KiB
Markdown
[](http://opensource.org/licenses/BSD-3-Clause)
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[](https://github.com/ethauvin/dcat/actions/workflows/dart.yml)
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# dcat: Concatenate File(s) to Standard Output
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A **cat** command-line implemenation in [Dart](https://dart.dev/), inspired by the [Write command-line apps sample code](https://dart.dev/tutorials/server/cmdline).
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## Command-Line Usage
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```sh
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dcat --help
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```
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```
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Usage: dcat [OPTION]... [FILE]...
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Concatenate FILE(s) to standard output.
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With no FILE, or when FILE is -, read standard input.
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-b, --number-nonblank number nonempty output lines, overrides -n
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-E, --show-ends display $ at end of each line
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-h, --help display this help and exit
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-n, --number number all output lines
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-T, --show-tabs display TAB characters as ^I
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-s, --squeeze-blank suppress repeated empty output lines
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--version output version information and exit
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Examples:
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dcat f - g Output f's contents, then standard input, then g's contents.
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dcat Copy standard input to standard output.
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```
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## Compile Application
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### *nix
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```sh
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dart compile exe -o bin/dcat bin/dcat.dart
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```
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### Windows
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```cmd
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dart compile exe bin/dcat.dart
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```
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## Differences from [GNU cat](https://www.gnu.org/software/coreutils/manual/html_node/cat-invocation.html#cat-invocation)
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- No binary file support.
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- Line numbers are printed as `X:` where `X` is the line number.
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