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133 lines
7.6 KiB
Markdown
133 lines
7.6 KiB
Markdown
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[#]: collector: (lujun9972)
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[#]: translator: ( )
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (Plan your own holiday calendar at the Linux command line)
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[#]: via: (https://opensource.com/article/18/12/linux-toy-cal)
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[#]: author: (Jason Baker https://opensource.com/users/jason-baker)
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Plan your own holiday calendar at the Linux command line
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======
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Link commands together to build a colorful calendar, and then whisk it away in a snowstorm.
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Welcome to today's installment of the Linux command-line toys advent calendar. If this is your first visit to the series, you might be asking yourself, what’s a command-line toy. Even I'm not quite sure, but generally, it could be a game or any simple diversion that helps you have fun at the terminal.
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It's quite possible that some of you will have seen various selections from our calendar before, but we hope there’s at least one new thing for everyone.
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We've somehow made it to the seventh day of our series without creating an actual calendar to celebrate with, so let's use a command-line tool to do that today: **cal**. By itself, **cal** is perhaps not the most amazing of tools, but we can use a few other utilities to spice it up a bit.
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Chances are, **cal** is installed on your system already. To use it in this instance, just type **cal**.
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```
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$ cal
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December 2018
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Su Mo Tu We Th Fr Sa
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1
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2 3 4 5 6 7 8
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9 10 11 12 13 14 15
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16 17 18 19 20 21 22
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23 24 25 26 27 28 29
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30 31
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```
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We aren't going to go into advanced usage in this article, so if you want to learn more about **cal** , go check out Opensource.com Community Moderator Don Watkin's excellent [overview of the date and cal commands][1].
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Now, let's spice it up with a pretty box, as we covered in our previous Linux toy article. I'll use the diamonds box, and use a little bit of padding to get it nicely aligned.
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```
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$ cal | boxes -d diamonds -p a1l4t2
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/\ /\ /\
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/\//\\/\ /\//\\/\ /\//\\/\
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/\//\\\///\\/\//\\\///\\/\//\\\///\\/\
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//\\\//\/\\///\\\//\/\\///\\\//\/\\///\\
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\\//\/ \/\\//
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\/ \/
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/\ December 2018 /\
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//\\ Su Mo Tu We Th Fr Sa //\\
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\\// 1 \\//
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\/ 2 3 4 5 6 7 8 \/
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/\ 9 10 11 12 13 14 15 /\
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//\\ 16 17 18 19 20 21 22 //\\
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\\// 23 24 25 26 27 28 29 \\//
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\/ 30 31 \/
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/\ /\
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//\\/\ /\//\\
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\\///\\/\//\\\///\\/\//\\\///\\/\//\\\//
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\/\\///\\\//\/\\///\\\//\/\\///\\\//\/
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\/\\//\/ \/\\//\/ \/\\//\/
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\/ \/ \/
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```
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That looks nice, but for good measure, let's put the whole thing in a second box, just for fun. We'll use the scoll design this time.
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```
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cal | boxes -d diamonds -p a1t2l3 | boxes -a c -d scroll
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/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \
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| /~~\ /~~\ |
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|\ \ | /\ /\ /\ | / /|
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| \ /| /\//\\/\ /\//\\/\ /\//\\/\ |\ / |
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| ~~ | /\//\\\///\\/\//\\\///\\/\//\\\///\\/\ | ~~ |
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| | //\\\//\/\\///\\\//\/\\///\\\//\/\\///\\ | |
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| | \\//\/ \/\\// | |
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| | \/ \/ | |
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| | /\ December 2018 /\ | |
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| | //\\ Su Mo Tu We Th Fr Sa //\\ | |
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| | \\// 1 \\// | |
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| | \/ 2 3 4 5 6 7 8 \/ | |
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| | /\ 9 10 11 12 13 14 15 /\ | |
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| | //\\ 16 17 18 19 20 21 22 //\\ | |
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| | \\// 23 24 25 26 27 28 29 \\// | |
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| | \/ 30 31 \/ | |
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| | /\ /\ | |
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| | //\\/\ /\//\\ | |
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| | \\///\\/\//\\\///\\/\//\\\///\\/\//\\\// | |
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| | \/\\///\\\//\/\\///\\\//\/\\///\\\//\/ | |
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| | \/\\//\/ \/\\//\/ \/\\//\/ | |
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\ |~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| /
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\ / \ /
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~~~ ~~~
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```
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Perfect. Now, here's where things get a little crazy. I like our design, but, I'd like to go all out. So I'm going to colorize it. But here in the Raleigh, NC office where Opensource.com's staff are based, there's a good chance for snow this weekend. So let's enjoy our colorized advent calendar, and then wipe it out with snow.
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For the snow, I'm grabbing a nifty [snippet][2] of Bash and Gawk goodness I found over on CLIMagic. If you're not familiar with CLIMagic, go check out their [website][3] and follow them on [Twitter][4]. You'll be glad you did.
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So here we go. Let's clear the screen, throw up our boxy calendar, colorize it, wait a few seconds, then snowstorm it away. All here at the terminal, in one line.
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```
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$ clear;cal|boxes -d diamonds -p a1t2l3|boxes -a c -d scroll|lolcat;sleep 3;while :;do echo $LINES $COLUMNS $(($RANDOM%$COLUMNS)) $(printf "\u2744\n");sleep 0.1;done|gawk '{a[$3]=0;for(x in a) {o=a[x];a[x]=a[x]+1;printf "\033[%s;%sH ",o,x;printf "\033[%s;%sH%s \033[0;0H",a[x],x,$4;}}'
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```
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And there we go.
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For this to work on your system, you'll need all of the referenced utilities (boxes, lolcat, cal, gawk, etc.), and you'll need to use a terminal emulator that supports Unicode.
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Do you have a favorite command-line toy that you think I ought to profile? The calendar for this series is mostly filled out but I've got a few spots left. Let me know in the comments below, and I'll check it out. If there's space, I'll try to include it. If not, but I get some good submissions, I'll do a round-up of honorable mentions at the end.
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Check out yesterday's toy, [Take a break at the Linux command line with Nyan Cat][5], and check back tomorrow for another!
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--------------------------------------------------------------------------------
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via: https://opensource.com/article/18/12/linux-toy-cal
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作者：[Jason Baker][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://opensource.com/users/jason-baker
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[b]: https://github.com/lujun9972
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[1]: https://opensource.com/article/16/12/using-calendar-function-linux
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[2]: http://climagic.org/coolstuff/let-it-snow.html
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[3]: http://climagic.org/
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[4]: https://twitter.com/climagic
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[5]: https://opensource.com/article/18/12/linux-toy-nyancat
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