5 ms·

Being a Good Unix Neighbour

36 points by leblancfg 3y ago

niko_draca 3y ago
[dead]
metadat 3y ago
That @click library is a lot less lines of code than the equivalent argparse boilerplate. That's nice.
somat 3y ago
> Take for example this one-liner: > [program listing...] > In this condensed program of 4 lines, the following happens: Right a "one" liner I see... once it gets above roughly 100 characters you are no longer allowed to call it a "one liner" and style note putting the pipe"|" at the end of the command instead of the beginning acts as a natural break and lets you avoid the backslash escaped newline nonsense. curl ... | jq ... | awk .... vs curl ... \ | jq ... \ | awk ...
- yjftsjthsd-h 3y ago
  If we're nitpicking the number of lines, I'm way more confused because there is no obvious way that I can see for that to be 4 lines. Either it's a (very long) one liner, or it is as rendered a 5 line example (with the lines starting with curl, jq, sqlite3, sqlite3, and xargs). Where is 4 coming from? (To be clear, this sounds like a complaint, and it kind of is, but I think the article is actually quite good if we just ignore that one basically irrelevant detail)
- leblancfg 3y ago
  TIL about the pipe/newline, thanks. Edited.
  - rgrau 3y ago
    Another advantage of pipes at the end is that you can comment lines and the full pipeline still works. Some time ago I wrote a bunch of tips to make more ergonomic bash scripts: https://raimonster.com/scripting-field-guide/index.html https://raimonster.com/scripting-field-guide/index.html Also, Perl's diamond operator does the DWIM thing with files/stdin, and it's used directly as a line iterator. It handles multiple files (or none) in a row, which is a nice plus :) https://perlmaven.com/the-diamond-operator https://perlmaven.com/the-diamond-operator
JdeBP 3y ago
Many of us are no doubt just waiting for the webmaster of www.example.com to realize that there's a marvellous Bobby Tables SQL injection exploit in there. (-: Being a good neighbour involves a bit more than reading from standard input and being about to send JSON to standard output; and there's more to be said about the field parsing, including that fields must not contain interior whitespace, for which vis(1) encoding is a good idea.
- pxc 3y ago
  > Many of us are no doubt just waiting for the webmaster of www.example.com to realize that there's a marvellous Bobby Tables SQL injection exploit in there. (-: Thankfully, there'll never be one! https://en.wikipedia.org/wiki/Example.com https://en.wikipedia.org/wiki/Example.com

36 points by leblancfg 3y ago

niko_draca 3y ago

[dead]

metadat 3y ago

That @click library is a lot less lines of code than the equivalent argparse boilerplate. That's nice.

somat 3y ago

> Take for example this one-liner: > [program listing...] > In this condensed program of 4 lines, the following happens: Right a "one" liner I see... once it gets above roughly 100 characters you are no longer allowed to call it a "one liner" and style note putting the pipe"|" at the end of the command instead of the beginning acts as a natural break and lets you avoid the backslash escaped newline nonsense. curl ... | jq ... | awk .... vs curl ... \ | jq ... \ | awk ...

yjftsjthsd-h 3y ago
If we're nitpicking the number of lines, I'm way more confused because there is no obvious way that I can see for that to be 4 lines. Either it's a (very long) one liner, or it is as rendered a 5 line example (with the lines starting with curl, jq, sqlite3, sqlite3, and xargs). Where is 4 coming from? (To be clear, this sounds like a complaint, and it kind of is, but I think the article is actually quite good if we just ignore that one basically irrelevant detail)
leblancfg 3y ago
TIL about the pipe/newline, thanks. Edited.
- rgrau 3y ago
  Another advantage of pipes at the end is that you can comment lines and the full pipeline still works. Some time ago I wrote a bunch of tips to make more ergonomic bash scripts: https://raimonster.com/scripting-field-guide/index.html https://raimonster.com/scripting-field-guide/index.html Also, Perl's diamond operator does the DWIM thing with files/stdin, and it's used directly as a line iterator. It handles multiple files (or none) in a row, which is a nice plus :) https://perlmaven.com/the-diamond-operator https://perlmaven.com/the-diamond-operator

JdeBP 3y ago

Many of us are no doubt just waiting for the webmaster of www.example.com to realize that there's a marvellous Bobby Tables SQL injection exploit in there. (-: Being a good neighbour involves a bit more than reading from standard input and being about to send JSON to standard output; and there's more to be said about the field parsing, including that fields must not contain interior whitespace, for which vis(1) encoding is a good idea.

pxc 3y ago
> Many of us are no doubt just waiting for the webmaster of www.example.com to realize that there's a marvellous Bobby Tables SQL injection exploit in there. (-: Thankfully, there'll never be one! https://en.wikipedia.org/wiki/Example.com https://en.wikipedia.org/wiki/Example.com