Is there an alternative of `go get`
Hi everyone, `go get` in Golang world has a simple way to fetch and install binary ``` $ go get github/foo/bar.git $ export PATH=$PATH:$(go env GOPATH)/bin $ bar --help ``` This saves a lot of time and setup. Is that an alternative when using dub? Thanks a lot.
Re: Which Docker to use?
On Wednesday, 17 October 2018 at 23:15:53 UTC, Jon Degenhardt wrote: I need to use docker to build static linked Linux executables. My reason is specific, may be different than the OP's. I'm using Travis-CI to build executables. Travis-CI uses Ubuntu 14.04, but static linking fails on 14.04. The standard C library from Ubuntu 16.04 or later is needed. There may be other/better ways to do this, I don't know. Yes I'm also using Travis-CI and that's why I need some Docker support.
Which Docker to use?
Hi, I need to build some static binaries with LDC. I also need to execute builds on both platform 32-bit and 64-bit. From Docker Hub there are two image groups: * language/ldc (last update 5 months ago) * dlang2/ldc-ubuntu (updated recently) Which one do you suggest? Thanks a lot.
Dlang on OpenWrt
Hi, can I build my program on OpenWrt? I haven't found any resources on internet maybe I'm missing something. Thanks a lot.
Is there a way to anonymously execute some sh script contents?
Hi, I have some big shell script that may require user input. Using `pipeProcess` doesn't work as `pipe` doesn't allow user to provide custom input (FIXME). I am creating some temporary files, put the script contents to that file and then invoke [code] spawnProcess([/path/to/shell, /path/to/temporary/script/file]); [/code] This works well with user interaction. However I don't really like the idea of using temporary files. Is there any better way? Thanks for your reading.
Re: Why does not UFCS work for method defined inside unittest block?
On Tuesday, 31 July 2018 at 08:42:28 UTC, Simen Kjærås wrote: From https://dlang.org/spec/function.html#pseudo-member: "A free function can be called with a syntax that looks as if the function were a member function of its first parameter type." [...] Thanks a lot Simen :)
Re: Why does not UFCS work for method defined inside unittest block?
dmd version that I'm using: $ dmd --version DMD64 D Compiler v2.081.1-dirty Copyright (C) 1999-2018 by The D Language Foundation, All Rights Reserved written by Walter Bright
Why does not UFCS work for method defined inside unittest block?
Hi,
Can I define a new quick function to use inside a unittest block?
I have the following code:
[code]
auto foo(string[] sta) {
return sta;
}
auto bar(string[] sta) {
return sta;
}
auto h(string[] sta) {
return sta.foo.bar;
}
unittest {
import std.format;
auto f = (string[] sta) => sta.foo.bar;
auto g(string[] sta) {
return sta.foo.bar;
}
assert(f(["test"]) == ["test"]);
assert(g(["test"]) == ["test"]);
assert(["test"].h == ["test"]);
assert(["test"].g == ["test"]);
}
[/code]
(Src:
https://gist.github.com/icy/64ec1838929d448d9f874d1e8261e56a)
The last test will fail: Error: no property g for type string[]
Please advise.
Thanks a lot.
Re: Is it possible to have reproducible-builds?
On Thursday, 26 October 2017 at 04:34:36 UTC, Ky-Anh Huynh wrote: Hi, I'd like to distribute binaries (compiled from Dlang sources) to my servers and users. This really helps end users because they don't need to rebuild things with custom dmd/dub setup. However, distributing things require them to `trust` me, and this is another thing I want to avoid. Is it possible to have reproducible-builds with (any) dlang compiler? and how? See also https://wiki.debian.org/ReproducibleBuilds Thanks a lot for your reading. See also the old topic: http://forum.dlang.org/thread/fsmdaethvbvcxnunb...@forum.dlang.org
Is it possible to have reproducible-builds?
Hi, I'd like to distribute binaries (compiled from Dlang sources) to my servers and users. This really helps end users because they don't need to rebuild things with custom dmd/dub setup. However, distributing things require them to `trust` me, and this is another thing I want to avoid. Is it possible to have reproducible-builds with (any) dlang compiler? and how? See also https://wiki.debian.org/ReproducibleBuilds Thanks a lot for your reading.
Re: Writing some built-in functions for Bash, possible?
On Wednesday, 18 October 2017 at 08:15:53 UTC, evilrat wrote:
[...]
This isn't the actual code but should give you a hint, the rest
is up to you.
Woh Thanks a ton. I can have some working code after a few hours
:D
https://github.com/icy/dusybox/blob/master/lib/dusybox/bash_builtin_hello/package.d
(A screenshot:
https://github.com/icy/dusybox#a-bash-builtin-command)
I got problem with type conversion. I had to use inline
declaration for `long_doc`:
```
extern(C) static builtin dz_hello_struct =
{
name: cast (char*) "dz_hello",
func: _hello_builtin,
flags: BUILTIN_ENABLED,
long_doc: [
"Hello, it's from Dlang.",
"",
"A Hello builtin command written in Dlang."
],
short_doc: cast (char*) "dz_hello",
handle: null
};
```
otherwise the compiler reports that some variable is not be read
at compile time, or kind of `cannot use non-constant CTFE pointer
in an initializer`.
There are many things I need to study from your post. So far it's
good :)
Thanks again
Re: Writing some built-in functions for Bash, possible?
On Wednesday, 18 October 2017 at 03:48:01 UTC, Ky-Anh Huynh wrote: Some examples in C are in [2]. My experience: Dlang has `pipe` support however the syntax is not as clean as Bash :) Most of the times I see short (<1k loc) Bash scripts are easy to maintain than Ruby (and now D things) scripts. And yeah writing in Bash has a lot of side effects ^.^
Writing some built-in functions for Bash, possible?
Hi, I'm using Bash heavily in my systems. Things become slow and slow when I have tons of scripts :) And sometimes it's not easy to manipulate data. You may have heard of recutils [1] which has a C extension to be loaded by Bash. Is it possible to write similar things in D, for Bash? I am not good at C; it's great if I explore this field:) Some examples in C are in [2]. My experience: Dlang has `pipe` support however the syntax is not as clean as Bash :) Most of the times I see short (<1k loc) Bash scripts are easy to maintain than Ruby (and now D things) scripts. Thanks for your reading. [1]: https://news.ycombinator.com/item?id=15302035 [2]: http://git.savannah.gnu.org/cgit/bash.git/tree/examples/loadables/cat.c
Re: How to modify process environment variables
On Tuesday, 17 October 2017 at 08:42:09 UTC, Rene Zwanenburg wrote: On Tuesday, 17 October 2017 at 05:57:50 UTC, Ky-Anh Huynh wrote: On Tuesday, 17 October 2017 at 04:56:23 UTC, ketmar wrote: you can use libc's `putenv()` in D too, it is ok. just import `core.sys.posix.stdlib`, it is there. D is not antagonistic to C, and doesn't try to replace the whole libc with it's own libraries. so if you see something that libc has and you'd like to use -- just do it! ;-) I see :) I have always tried to avoid C if possible :D As an alternative, a search on code.dlang.org turned up this lib: http://code.dlang.org/packages/dotenv Awesome. I will take a look definitely. I have a similar way in my NodeJS team :D
Re: How to modify process environment variables
On Tuesday, 17 October 2017 at 11:49:32 UTC, Jacob Carlborg wrote: On 2017-10-17 06:51, Ky-Anh Huynh wrote: Hi, Is it possible to change the current process's environment variables? I have looked at `std/process.d` source code, and there is only a private method `createEnv` used when new (sub)process is created. In C `putEnv` the answer is positive: http://man7.org/linux/man-pages/man3/putenv.3.html (FIXME) I come to this question as I want to set some custom variables for my unittests. My program reads some tokens from system environments, and it's convenient if I can simulate different cases for testings. Thanks for your reading and support. Use std.process.environment [1] and assign to it like an associative array. [1] https://dlang.org/phobos/std_process.html#.environment.opIndexAssign Oh thanks a lot for your pointing out, Jacob. That's the thing I'm looking for. The C version is not so bad though ``` import core.sys.posix.stdlib; import std.string: toStringz; string jenkinsToken = "TEST_TOKEN="; putenv(cast(char*)jenkinsToken); ```
Re: How to modify process environment variables
On Tuesday, 17 October 2017 at 04:56:23 UTC, ketmar wrote: you can use libc's `putenv()` in D too, it is ok. just import `core.sys.posix.stdlib`, it is there. D is not antagonistic to C, and doesn't try to replace the whole libc with it's own libraries. so if you see something that libc has and you'd like to use -- just do it! ;-) I see :) I have always tried to avoid C if possible :D
How to modify process environment variables
Hi, Is it possible to change the current process's environment variables? I have looked at `std/process.d` source code, and there is only a private method `createEnv` used when new (sub)process is created. In C `putEnv` the answer is positive: http://man7.org/linux/man-pages/man3/putenv.3.html (FIXME) I come to this question as I want to set some custom variables for my unittests. My program reads some tokens from system environments, and it's convenient if I can simulate different cases for testings. Thanks for your reading and support.
How to embed static strings to a D program?
Hello, I want to use some static contents in my program, e.g, a CSS file, a long listing. To help deployment process I'd like to have them embedded in the final binary file. Is there any convenient way to support this? Maybe I need a tool/library to load file contents and generate D-code at run-time ? Thanks for your reading.
Re: Can I skip sub directories with file.dirEntries() ?
On Wednesday, 27 September 2017 at 10:05:34 UTC, Nicholas Wilson
wrote:
I'd just use dirEntries with SpanMode.shallow in combination
with filter either in a loop or a recursive function like below.
void foo(string path = "path")
{
foreach(e;
dirEntries(path,SpanMode.shallow).filter!(myCritreia(paramters)))
{
if (e. isDir)
foo(e.name); // recurse
// do other stuff
}
}
you will loop over all subdirs of "path" that satisfy
`myCritreia`.
Thank you Nicolas. It's a good idea.
PS: With Linux find command, the thing can be done easily with
`-prune` option:
```
find . -iname node_modules -prune
```
Without `-prune` option, there are a lot of unnecessary sub
directories...
Re: What does ! mean?
On Wednesday, 27 September 2017 at 14:34:06 UTC, Eugene Wissner wrote: See also the following chapter in Ali's book: http://ddili.org/ders/d.en/templates.html Thanks a lot. I will keep reading :)
What does ! mean?
Hi, I am from Ruby world where I can have `!` (or `?`) in method names: `!` indicates that a method would modify its object (`foo.upcase!` means `foo = foo.upcase`). ( I don't know if there is any official Ruby documentation on this convention though. ) In D I see `!` quite a lot. I have read the first 50 chapters in Ali's book but nowhere I see a note on `!`. It's about the compile thing, isn't it? E.g, ``` foo = formattedRead!"%s"(value); ``` But I also see `!` for some map/filter invocations. It's quite confusing me. Can you please explain and give any link where I can learn more about these things? Thanks a lot.
Can I skip sub directories with file.dirEntries() ?
Hi, Can I have a `break` option when using `dirEntries()` (similar to `break` in a loop)? I want to study sub-directories but if any sub-directory matches my criteria I don't to look further into their subdirectories ``` A/ -> matches criteria, stop here, go to next directory (B) B/ -> doesn't match criteria, will look at its sub-directories (BX, BY,...) BX BY ``` Thanks a lot
Re: How to list all process directories under /proc/
On Tuesday, 19 September 2017 at 18:32:06 UTC, Matt Jones wrote: On Tuesday, 19 September 2017 at 13:32:29 UTC, Ky-Anh Huynh wrote: Btw, is that a bit weird that range is not supported in glob pattern :) Is there a design reason for this? That is strange. But then again, every glob library I've seen works a little bit differently. I see. Maybe I'm using Linux and Ruby too much. Missing character range doesn't really hurt, but the feature should be documented. Should we improve the documentation? To be fair, the syntax specification is clear after I read it twice, but the link to Wiki page is confusing, because Wiki page mentions the popular (FIXME) implementation with character range.
Re: formattedRead can't work with tab delimiter input
On Tuesday, 19 September 2017 at 20:04:36 UTC, kdevel wrote:
On Tuesday, 19 September 2017 at 13:28:22 UTC, Ky-Anh Huynh
wrote:
Hi,
I want to read two fields from STDIN
string key;
double value;
line_st.formattedRead!"%s %f"(key, value);
Well it's so different from C. I would use this:
---
auto t = line_st.split.join (' ');
t.formattedRead!"%s %f"(key, value);
---
Yes it's possible.
It's a little weird and it seems the "feature" (or bug) is not
documented on https://dlang.org/phobos/std_format.html. Why a tab
(`\t`) isn't considered as a space?
Re: How to list all process directories under /proc/
On Tuesday, 19 September 2017 at 06:35:18 UTC, Matt Jones wrote: On Sunday, 17 September 2017 at 08:37:33 UTC, Ky-Anh Huynh wrote: [...] The problem with matching "[0123456789]*" is that it will match files like "1blah" and "8stuff". It looks like glob patterns are not robust enough to handle match patterns you want. A regex would probably be enough. Something like this works: [...] I understand. Thanks a lot. Btw, is that a bit weird that range is not supported in glob pattern :) Is there a design reason for this?
formattedRead can't work with tab delimiter input
Hi, I want to read two fields from STDIN string key; double value; line_st.formattedRead!"%s %f"(key, value); However, if the input line contains \t and it doesn't contain any space, the code doesn't work as expected. If there is a space, it works well a[space]1 # work, key => a, value => 1 b[space][tab]2# work, key => b, value => 2 c[tab]3 # not work, key => c[tab]3, value => nan Can you please help? Thanks a lot. PS: My program is found here https://github.com/icy/dusybox/blob/master/src/plotbar/main.d#L59
How to Skip some field/word in formattRead?
Hi,
Is it possible to read just the second word from an input string
and skip all others?
"one two three".formattedRead!("%s %s", _, saveme)
The point is I want to skip the first/third word (`one`, `third`)
and read the second word (`two`) into the variable `saveme`. For
now I have to declare temporary reference
string _;
"one two three".formattedRead!("%s %s %s", _, saveme, _);
Well, `_` is acceptable; in my example, the value of `_` would be
`three[\n]`
Is there any better/cleaner way?
Thanks for your reading.
Re: How to list all process directories under /proc/
On Sunday, 17 September 2017 at 08:32:24 UTC, Ky-Anh Huynh wrote:
My bad. Range doesn't support. The correct pattern is
[code]
foreach (string fstatm; dirEntries("/proc/", "[0123456789]*",
SpanMode.shallow)) {
writefln("pid %s", fstatm);
}
[/code]
Is there a way to make this simpler?
The official documentation here
https://dlang.org/phobos/std_path.html#.globMatch refers to the
wiki page https://en.wikipedia.org/wiki/Glob_%28programming%29 .
However I think the popular glob rules (man 7 glob) are not
supported.
Re: How to list all process directories under /proc/
On Sunday, 17 September 2017 at 08:15:58 UTC, Ky-Anh Huynh wrote:
Hi,
I want to list all processes by scanning /proc/. The following
code doesn't work
[code]
foreach (string fstatm; dirEntries("/proc/", "[0-9]*",
SpanMode.shallow)) {
writefln("pid %s", fstatm);
}
[/code]
as it only list a few entries before exiting
[code]
pid /proc/9
pid /proc/935
pid /proc/9146
pid /proc/9149
pid /proc/9150
pid /proc/9151
pid /proc/9756
pid /proc/9759
pid /proc/9760
pid /proc/9761
[/code]
I don't want to use `SpanMode.depth` or `SpanMode.breadth`
because it will scan so deeply and there would be a permission
problem.
Any ideas?
Thanks a lot
My bad. Range doesn't support. The correct pattern is
[code]
foreach (string fstatm; dirEntries("/proc/", "[0123456789]*",
SpanMode.shallow)) {
writefln("pid %s", fstatm);
}
[/code]
Is there a way to make this simpler?
How to list all process directories under /proc/
Hi,
I want to list all processes by scanning /proc/. The following
code doesn't work
[code]
foreach (string fstatm; dirEntries("/proc/", "[0-9]*",
SpanMode.shallow)) {
writefln("pid %s", fstatm);
}
[/code]
as it only list a few entries before exiting
[code]
pid /proc/9
pid /proc/935
pid /proc/9146
pid /proc/9149
pid /proc/9150
pid /proc/9151
pid /proc/9756
pid /proc/9759
pid /proc/9760
pid /proc/9761
[/code]
I don't want to use `SpanMode.depth` or `SpanMode.breadth`
because it will scan so deeply and there would be a permission
problem.
Any ideas?
Thanks a lot
Re: Convert user input string to Regex
On Saturday, 16 September 2017 at 03:23:14 UTC, Adam D. Ruppe wrote: On Saturday, 16 September 2017 at 03:18:31 UTC, Ky-Anh Huynh wrote: Is there a way to transform user input string to a regular expression? For example, I want to write a `grep`-like program import std.regex; auto re = regex(user_pattern, user_flags); You'll probably want to split it on the '/' to split the pattern and the flags since they are two separate variables to the regex function, but that's all you need to do. http://dpldocs.info/experimental-docs/std.regex.regex.2.html Thanks Adam. I will give it a try.
Convert user input string to Regex
Hi, Is there a way to transform user input string to a regular expression? For example, I want to write a `grep`-like program ``` mygrep -E '/pattern/i' file.txt ``` and here the user's parameter `/pattern/i` would be converted to a Regex object. Fyi, in Ruby, `to_regexp` is a useful gem: https://rubygems.org/gems/to_regexp Thanks a lot.
Re: Unit-tests with stderr / stdout
On Saturday, 9 September 2017 at 03:37:58 UTC, Ky-Anh Huynh wrote: Hi, As a system administrator I often have some small scripts/ programs that consume input and produce output for other system utilities. Something like `my_foo_program | awk ... | other_program`. As the tools write to STDOUT/STDERR, I haven't found a way to write unit tests for them. Should I write library instead? Is there any framework to write (smoke) tests that supports standard output devices? Thanks for your reading. So far I have refactored my code to use some public libraries. This allows me to write some unit tests. This requires a lot more work :) Sorry for the noise.
Re: Should `dub run` prints its output to STDERR?
On Saturday, 9 September 2017 at 05:58:59 UTC, Ali Çehreli wrote: On 09/08/2017 09:51 PM, Ky-Anh Huynh wrote: > When I execute a program thanks to dub, `dub` also prints its > information to STDOUT: Try dub's --quiet command line switch. Ali That's perfect. Thanks a lot.
Should `dub run` prints its output to STDERR?
When I execute a program thanks to dub, `dub` also prints its information to STDOUT: [code] $ dub run dusybox:jq -- .status " 1" < /home/pi/df/acces.log |head -10 Building package dusybox:jq in /home/pi/projects/icy/dusybox/ Performing "debug" build using dmd for x86_64. dusybox:jq ~master: target for configuration "application" is up to date. To force a rebuild of up-to-date targets, run again with --force. Running ./dusybox_jq .status1 4031 4031 3021 [/code] Those first 5 lines are generated by `dub` and written to STDOUT. This is a bit inconvenient if I want to use my program output as input for another program. We may have the same program if `dub` writes to STDERR. But it's more sense that a pipe program uses STDIN for input. This is a popular behavior I think. Is there any option other than redirecting which depends on shell support? Thanks,
Unit-tests with stderr / stdout
Hi, As a system administrator I often have some small scripts/ programs that consume input and produce output for other system utilities. Something like `my_foo_program | awk ... | other_program`. As the tools write to STDOUT/STDERR, I haven't found a way to write unit tests for them. Should I write library instead? Is there any framework to write (smoke) tests that supports standard output devices? Thanks for your reading.
Re: Problem with std.string.strip(): Can't use result in format routine
On Tuesday, 5 September 2017 at 13:56:20 UTC, Andrea Fontana
wrote:
I used `lines(stdin)` as in
https://dlang.org/phobos/std_stdio.html#.lines . My source
code is here
https://github.com/icy/dusybox/blob/master/src/plotbar/main.d#L47 .
Thanks for your support.
I think formattedRead is consuming your string.
Great catch. You're right. Thanks a lot.
`strip()` returns a slice. I use another reference variable to
save them and it's fine now.
[code]
auto line_st = line.strip();
auto line_st2 = line_st;
writefln("Stripped lined is %s", line_st2); // works fine
[/code]
Re: Problem with std.string.strip(): Can't use result in format routine
On Tuesday, 5 September 2017 at 13:17:34 UTC, Azi Hassan wrote: Maybe it has something to do with how you read from STDIN. Can you show that part of the code to see if I can reproduce the issue ? I used `lines(stdin)` as in https://dlang.org/phobos/std_stdio.html#.lines . My source code is here https://github.com/icy/dusybox/blob/master/src/plotbar/main.d#L47 . Thanks for your support.
Problem with std.string.strip(): Can't use result in format routine
Hi,
I read line from STDIN , and strip them
[code]
auto line_st = line.strip();
[/code]
However, I can't use result in another format routine. Assume my
input line is "foobar":
[code]
writeln("Stripped line is %s", line_st);
[/code]
This code only prints "Stripped line is ". If I use instead
[code]
writeln("Stripped line is %s", line.strip());
[/code]
the result is "Stripped line is foobar".
What're the difference between the two uses? I'm using `dmd
v2.075.1`.
Thanks a lot.
