I use this to embed the date and time when a program is compiled into the go source code just before compilation. This allows me to use it when printing version info. I tried to find something similar as a Go built-in but stopped looking when I got this idea. I suppose it could be used to capture other parts of the compile-time environment like memory size and CPU architecture of the system doing the compiling, but date and time was all I was interested in at the moment.
It's almost trivial but it has proven very useful so I'm sharing it.
If you have a working go installation on a Unix-like OS:
go get github.com/hotei/godatetime
Will copy github.com/hotei/godatetime to the first entry of your $GOPATH
or if go is not installed yet :
cd DestinationDirectory
git clone https://github.com/hotei/godatetime.git
- simple
- works as intended
- non known
Typical usage is in two parts. Note goprog is the program being compiled; N.B. the name given to output of godatetime isn't important, but should be chosen to avoid overwriting other files.
First, in the goprog Makefile:
# Makefile for goprog
all:
godatetime -pkg=main > compileDate.go
go build
Somewhere in goprog.go you'd have a line similar to:
fmt.Printf("Compiled on %s\n", CompileDateTime)- none known
- Essential:
- TBD
- Nice:
- TBD
- Nice but no immediate need:
- TBD
- 2015-06-12 validated with 1.4.2
- 2014-xx-xx Started
Comments can be sent to hotei1352@gmail.com or to user "hotei" at github.com. License is BSD-two-clause, in file "LICENSE"
The 'godatetime' go package/program is distributed under the Simplified BSD License:
Copyright (c) 2015 David Rook. All rights reserved.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Documentation (c) 2014-2015 David Rook
// EOF README-godatetime.md (this is a markdown document and tested OK with blackfriday)