“Powerful Cli Applications in Go” Workspace
This isn’t a “real” project in the sense that it accepts PRs or should be used or forked by anyone as a real application.
This is my workspace for learing concepts from the book.
This is also my “notebook” on how to do things in Go or how to manage a Go project.
Book Info
Chapters|Apps
Chapter 01 – Your First Command-Line Program in Go – wordcount/wc
How to Install
I’m adding cli- prefix to the binaries so I don’t replace the system version of wc with this one in my PATH.
Using go install
$ go install github.com/vpayno/powerful-cli-apps-in-go-workspace/cmd/[email protected]
or
$ git clone https://github.com/vpayno/powerful-cli-apps-in-go-workspace.git
$ cd powerful-cli-apps-in-go-workspace
$ go generate
# go install ./cmd/cli-wc/cli-wc.go
Usage
$ ./scripts/go-cmd run ./... -h
go generate ./...
go generate: creating /home/vpayno/git_vpayno/powerful-cli-apps-in-go-workspace/cmd/cli-wc/./.version.txt
v0.0.0
v0.0.0-8-g275e726
275e72657a4241eaddc5ce90bbb1aaa0c6a0289b
2022-08-08T07:00:12Z
real 0m0.144s
user 0m0.102s
sys 0m0.140s
Usage of /tmp/go-build1277001378/b001/exe/cli-wc:
-V show the app version
-b count bytes instead of words
-l count lines instead of words
-v verbose mode
real 0m0.314s
user 0m0.301s
sys 0m0.290s
go run ./... -h
git restore ./cmd/cli-wc/.version.txt
real 0m0.004s
user 0m0.003s
sys 0m0.003s
Examples
- Show Version
$ go generate ./...
go generate: creating /home/vpayno/git_vpayno/powerful-cli-apps-in-go-workspace/cmd/cli-wc/./.version.txt
v0.0.0
v0.0.0-8-g275e726
275e72657a4241eaddc5ce90bbb1aaa0c6a0289b
2022-08-08T07:25:49Z
$ go build ./cmd/cli-wc/cli-wc.go
$ printf "%s\n" one two three four five | ./cli-wc -V
Word Count Version: v0.0.0
git version: v0.0.0-8-g275e726
git hash: 275e72657a4241eaddc5ce90bbb1aaa0c6a0289b
build time: 2022-08-08T07:25:49Z
- Count Words
$ printf "%s\n" one two three four five | ./cli-wc
5
$ printf "%s\n" one two three four five | ./cli-wc -v
Word Count Version v0.0.0
word count: 5
- Count Lines
$ printf "%s\n" one two three four five | ./cli-wc -l
5
$ printf "%s\n" one two three four five | ./cli-wc -l -v
Word Count Version v0.0.0
line count: 5
- Count Bytes
$ printf "%s\n" one two three four five | ./cli-wc -b
19
$ printf "%s\n" one two three four five | ./cli-wc -b -v
Word Count Version v0.0.0
byte count: 19
