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Updates for the parallel command execution part

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sharkdp 2017-10-22 21:57:20 +02:00 committed by David Peter
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@ -97,29 +97,27 @@ complete (and more colorful) variants, see
[here](https://github.com/seebi/dircolors-solarized) or
[here](https://github.com/trapd00r/LS_COLORS).
## Parallel Command Execution
If the `--exec` flag is specified alongside a command template, a job pool will be created for
generating and executing commands in parallel with each discovered path as the inputs. The syntax
for generating commands is similar to that of GNU Parallel:
## Parallel command execution
If the `-x`/`--exec` option is specified alongside a command template, a job pool will be created
for executing commands in parallel for each discovered path as the input. The syntax for generating
commands is similar to that of GNU Parallel:
- **{}**: A placeholder token that will be replaced with the discovered path.
- **{.}**: Removes the extension from the path.
- **{/}**: Uses the basename of the discovered path.
- **{//}**: Uses the parent of the discovered path.
- **{/.}**: Uses the basename, with the extension removed.
- `{}`: A placeholder token that will be replaced with the path of the search result
(`documents/images/party.jpg`).
- `{.}`: Like `{}`, but without the file extension (`documents/images/party`).
- `{/}`: A placeholder that will be replaced by the basename of the search result (`party.jpg`).
- `{//}`: Uses the parent of the discovered path (`documents/images`).
- `{/.}`: Uses the basename, with the extension removed (`party`).
```sh
# Demonstration of parallel job execution
fd -e flac --exec 'sleep 1; echo $\{SHELL}: {}'
``` bash
# Convert all jpg files to png files
fd -e jpg -x 'convert "{}" "{.}.png"'
# This also works, because `SHELL` is not a valid token
fd -e flac --exec 'sleep 1; echo ${SHELL}: {}'
# Unpack all zip files (if no placeholder is given, the path is appended):
fd -e zip -x unzip
# The token is optional -- it gets added at the end by default.
fd -e flac --exec 'echo'
# Real world example of converting flac files into opus files.
fd -e flac --type f --exec 'ffmpeg -i "{}" -c:a libopus "{.}.opus"'
# Convert all flac files into opus files:
fd -e flac -x 'ffmpeg -i "{}" -c:a libopus "{.}.opus"'
```
## Install