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cronv

(★ 320)

A visualizer for CRONTAB

File Explorer

Download Latest Version (.zip)

- - go.yaml
- main.go
- crontab
.gitignore
.go-version
crontab.go
crontab_test.go
go.mod
go.sum
LICENSE
option.go
option_test.go
README.md
template.go
visualize.go

# Installation Guide

1. Get the code

git clone https://github.com/takumakanari/cronv

Downloads the entire project code from GitHub to your computer.

cd cronv

Moves into the project folder you just downloaded.

2. Go

Medium Recommended

Prerequisites

Git Needed to download the project code from GitHub.
Go The Go compiler and toolchain.

go install -v github.com/takumakanari/cronv/cronv@0.4.5

Type this command into your terminal and run it.

$ crontab -l | go run cronv/main.go

Runs the Go program directly without a separate build step.

✅ If the build finishes without errors, it worked. If you used go run ., check the terminal output.

Pulled directly from this repo's README.

// repository documentation

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# cronv

Visualize your cron schedules in crontab

![cronv output 1d](https://raw.github.com/wiki/takumakanari/cronv/images/outputs/cronv-1d.png)
![cronv output 30m](https://raw.github.com/wiki/takumakanari/cronv/images/outputs/cronv-30m.png)

## Install

## go install

```shell
go install -v github.com/takumakanari/cronv/cronv@0.4.5
```

```shell
$ cronv --help
```

## Basic usage

Cronv can parse your crontab from stdin like as follows:

```shell
$ crontab -l | cronv -o ./my_cron_schedule.html
```

You can also specify the duration to analysis job schedules.

In a case like the follows, the job schedules will be analyzed from now to 24 hours later:

```shell
$ crontab -l | cronv -o ./my_cron_schedule.html -d 24h
```

> Cronv can parse cron entry written in basic cron format.
You can see the basically crontab specofication in [https://en.wikipedia.org/wiki/Cron#CRON_expression](https://en.wikipedia.org/wiki/Cron#CRON_expression).

## Options

```shell
Application Options:
  -o, --output=    path to .html file to output (default: ./crontab.html)
  -d, --duration=  duration to visualize in N{suffix} style. e.g.)
                   1d(day)/1h(hour)/1m(minute) (default: 6h)
      --from-date= start date in the format '2006/01/02' to visualize (default:
                   2017/03/15)
      --from-time= start time in the format '15:04' to visualize (default:
                   19:28)
  -t, --title=     title/label of output (default: cron tasks)
  -w, --width=     Table width of output (default: 100)

Help Options:
  -h, --help       Show this help message
```

## Examples
Analyze crontab for 6 hours (by default) from now, , output html file to default path:
```shell
$ crontab -l | cronv
```

For 1 day from now, output html file to default path:

```shell
$ crontab -l | cronv -d 1d
```

For 12 hours from 21:00, today:

```shell
$ crontab -l | cronv --from-time 21:00 -d 12h
```

For 30 minuts from now, output html file to path/to/output.html:

```shell
$ crontab -l | cronv -d 30m -o path/to/output.html
```

For 2 hours from 2016/12/24 17:30, output html file to path/to/output2.html:

```shell
$ crontab -l | cronv --from-date '2016/12/24' --from-time 17:30 -d 2h -o path/to/output2.html
```

With original title/label:

```shell
$ crontab -l | cronv -d 1d -t "crontab@`hostname`"  # title/label of html file will be 'crontab@myhost'
```

With *width* to spread output table:

```shell
$ crontab -l | cronv -o path/to/output2.html -w 180 # table width be 180% of the screen width (100% by default)

$ crontab -l | cronv -o path/to/output2.html -w 75 # be 75% of the screen width
```

## Development

Using **dep**.

```shell
$ cd /path/to/cronv
$ dep ensure
$ crontab -l | go run cronv/main.go
```

## TODO

- Add output format/style other than HTML.
- Filter entries in output HTML file.

## Patch

Welcome!