cmd

cmd

Handmade cmd for day-to-day plumbing.

Installation

~ $ go get -u github.com/rjeczalik/cmd/...

cmd/notify

Listens on filesystem changes and forwards received mapping to user-defined handlers.

Documentation

godoc.org/github.com/rjeczalik/cmd/notify

Usage

~ $ notify -c 'echo "Hello from handler! (event={{.Event}}, path={{.Path}})"'
2015/02/17 01:17:40 received notify.Create: "/Users/rjeczalik/notify.tmp"
Hello from handler! (event=create, path=/Users/rjeczalik/notify.tmp)
...

~ $ cat > handler <<EOF
> echo "Hello from handler! (event={{.Event}}, path={{.Path}})"
> EOF

~ $ notify -f handler
2015/02/17 01:22:26 received notify.Create: "/Users/rjeczalik/notify.tmp"
Hello from handler! (event=create, path=/Users/rjeczalik/notify.tmp)
...

cmd/dln

Prints derivative computed out of line-separated numbers.

Documentation

godoc.org/github.com/rjeczalik/cmd/dln

Usage

~ $ curl -sS http://cdimage.ubuntu.com/daily-live/current/vivid-desktop-amd64.iso -o vivid-amd64.iso &
[1] 21496

~ $ while sleep 1; do du -BK vivid-amd64.iso ; done | dln
1008
1172
1548
2332
3200
4756
6572
7056
7052
7048
7060
7036
7048
7056
^C

cmd/hist

Prints histogram for line-separated data points. It sorts the result set by the number of occurances in descending order.

Documentation

godoc.org/github.com/rjeczalik/cmd/hist

Usage

~ $ log=https://gist.githubusercontent.com/rjeczalik/f18349ad629f07d19839/raw/b8089282fdd5a8ea8589fe33bc88cc6d29db7026/lazyvm.log

~ $ curl -sS $log | dln | hist
  0	962	░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
  1	5	
 18	3	
  3	2	
  9	1	
  6	1	
 49	1	
 23	1	
 22	1	
 21	1	
 59	1	
 11	1	
 78	1	
  4	1	
 42	1	
  2	1

~ $ curl -sS $log | dln | hist -slice 1:
  1	5	░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
 18	3	░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░
  3	2	░░░░░░░░░░░░░░░░░░░░░░░░░
  9	1	░░░░░░░░░░░░
  6	1	░░░░░░░░░░░░
 49	1	░░░░░░░░░░░░
 23	1	░░░░░░░░░░░░
 22	1	░░░░░░░░░░░░
 21	1	░░░░░░░░░░░░
 59	1	░░░░░░░░░░░░
 11	1	░░░░░░░░░░░░
 78	1	░░░░░░░░░░░░
  4	1	░░░░░░░░░░░░
 42	1	░░░░░░░░░░░░
  2	1	░░░░░░░░░░░░

cmd/prepend

Command prepend inserts data read from stdin or an input file at the begining of the given file.

If data to prepend is passed both via stdin and input file, first the given file is prepended with data read from stdin, then from input file.

The prepend command does not load the files contents to the memory, making it suitable for large files. Writes issued by the prepend command are atomic, meaning if reading from stdin or input file fails the original file is left untouched.

Documentation

godoc.org/github.com/rjeczalik/cmd/prepend

Usage

~ $ cat > preamble.txt <<EOF
> // Copyright (c) 2015 Your Team. All right reserved.
> // Use of this source code is governed by the X license
> // that can be found in the LICENSE file
>
> EOF

~ $ preprend -u -f preamble.txt *.go

cmd/draft-init

Command draft-init is a conveniance wrapper for draft init and docker login commands, which is used to configure both - draft and docker - using GCP's service account json key file.

Documentation

godoc.org/github.com/rjeczalik/cmd/draft-init

Installation

$ go get -u github.com/rjeczalik/cmd/draft-init

Usage

Usage of draft-init:
  -docker
    	Initialize docker only.
  -domain string
    	Base domain for applications.
  -dry
    	Print commands only.
  -f string
    	Service account JSON key file.
  -gcr string
    	Container registry host. (default "gcr.io")