./learnuv ninja

[email protected] ninja ~/learning/learnuv
./gyp_learnuv.py -f ninja && ninja -C out/Debug $CURRENT_TARGET

['-f', 'ninja', '/learning/learnuv/learnuv.gyp', '-I', '/learning/learnuv/deps/libuv/common.gypi', '--depth=.', '-Dgcc_version=62', '-Dclang=0', '-Dhost_arch=x64', '-Dtarget_arch=x64', '-Duv_library=static_library', '-Dcomponent=static_library', '-Droot=/home/mariano/learning/learnuv', '-Dmagic_file=/learning/learnuv/magic/file.txt', '-Dhome=/', '-Dlearnuv_config=~/.config/learnuv']

Usage: npm

where is one of:
access, adduser, bin, bugs, c, cache, completion, config,
ddp, dedupe, deprecate, dist-tag, docs, edit, explore, get,
help, help-search, i, init, install, install-test, it, link,
list, ln, login, logout, ls, outdated, owner, pack, ping,
prefix, prune, publish, rb, rebuild, repo, restart, root,
run, run-script, s, se, search, set, shrinkwrap, star,
stars, start, stop, t, team, test, tst, un, uninstall,
unpublish, unstar, up, update, v, version, view, whoami

npm -h quick help on
npm -l display full usage info
npm help search for help on
npm help npm involved overview

Specify configs in the ini-formatted file:
~/.npmrc
or on the command line via: npm --key value
Config info can be viewed via: npm help config

[email protected] ~/.nvm/versions/node/v7.4.0/lib/node_modules/npm

Does anybody have some help for this?

When trying to clone this project I'm getting...

git clone https://github.com/thlorenz/learnuv && cd learnuv
Cloning into 'learnuv'...
fatal: Out of memory, malloc failed (tried to allocate 1024288000 bytes)
fatal: Not a git repository: '/home/meandave/Code/learnuv/.git'

I believe this means there are some REALLY large files in the git history?
I'm sure I'll find some other workaround, but thought you might want to go through
and prune out some of those large files.(if that is the issue)

['-f', 'make', '/home/tom/Public/learnuv/learnuv.gyp', '--depth=.', '-Goutput_dir=/home/tom/Public/learnuv/out', '--generator-output', '/home/tom/Public/learnuv/out', '-Dgcc_version=48', '-Dclang=0', '-Dhost_arch=i686', '-Dtarget_arch=i686', '-Duv_library=static_library', '-Dcomponent=static_library', '-Droot=/home/tom/Public/learnuv', '-Dmagic_file=/home/tom/Public/learnuv/magic/file.txt', '-Dhome=/home/tom', '-Dlearnuv_config=/home/tom/.config/learnuv']
gyp: /home/tom/Public/learnuv/deps/libuv/uv.gyp not found (cwd: /home/tom/Public/learnuv) while loading dependencies of /home/tom/Public/learnuv/learnuv.gyp while trying to load /home/tom/Public/learnuv/learnuv.gyp
Error running GYP

where can i get deps/ ?

As per IRC conversation here: http://logs.libuv.org/libuv/2016-06-29

Apparently, it is an access violation problem with the buffer.

The official libuv docs have majorly improved since this workshop was created.
I'm actually planning to deprecate the documentation part of libuv-dox only keeping the examples.

Ideally all links to documentation in this workshop would point to the official uv documentation before I do that.

Hello, i trying to install into windows with nodejs v6, but i get this error, how can i fix it?:

[email protected] preinstall C:\Windows\System32\learnuv
python scripts/install-dependencies.py

python: can't open file 'scripts/install-dependencies.py': [Errno 2] No such file or directory

npm WARN [email protected] license should be a valid SPDX license expression
npm ERR! Windows_NT 10.0.14393
npm ERR! argv "C:\Program Files (x86)\nodejs\node.exe" "C:\Program Files (x86)\nodejs\node_modules\npm\bin\npm-cli.js" "install"
npm ERR! node v6.7.0
npm ERR! npm v3.10.3
npm ERR! code ELIFECYCLE
npm ERR! [email protected] preinstall: python scripts/install-dependencies.py
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] preinstall script 'python scripts/install-dependencies.py'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the learnuv package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! python scripts/install-dependencies.py
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs learnuv
npm ERR! Or if that isn't available, you can get their info via:
npm ERR! npm owner ls learnuv
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! C:\Windows\System32\learnuv\npm-debug.log

Runnig ./learnuv make or ./learnuv ninja is always asking for XCode

xcode-select: error: tool 'xcodebuild' requires Xcode, but active developer directory '/Library/Developer/CommandLineTools' is a command line tools instance

Tried taking this for a spin on windows to see what would be involved in a pull request.
OUCH!!

Would it be better focusing on mingw?
http://www.mingw.org/wiki/howto_install_the_mingw_gcc_compiler_suite

I used it to get https://github.com/substack/dotc running on windows and it is a lot less hassle than visual studio installs.

The would mean refactoring the use of gyp but as node is/will be moving away from that it probably isn't a bad thing.

Just a thought really :)

I don't think rust is using libuv now, it seems they have moved to mio.

Please remove Mozilla's Rust language from What is libuv section.

Thank you.

It is included in learnuv.hbut both clang and I couldn't find it anywhere.

#include "task.h" /* MAKE_VALGRIND_HAPPY */

the solution to 03 in the repo is not working for me. it seems to be getting an extra newline in the output.

Adding this gets me past it but it's not very pretty

  char *e = strchr (buf, '\n');
  if (e) {
      *e = '\0';
  }

The read_cb function provided for exercise 05 performs free(context->iov.base); which is trying to free a pointer which was not allocated with malloc, realloc nor calloc.

I couldn't fix this error yet, but still think it's worth sharing this as an issue in case someone already fixed it and could suggest it in this thread.

The doc links were updated recently to point to the official libuv documentation.
However in some cases they don't link the exact method/section in the docs that are most helpful.

For example the 02_idle exercise should link uv_default_loop.

PRs welcome ;)

hi,

i was wondering how to build the first example to test my libuv learnings. what i tried was this on MacOS:

$ gcc -I deps/libuv/test/ -I deps/libuv/include/ -I deps/log src/01_system_info.c
Undefined symbols for architecture x86_64:
  "_uv_err_name", referenced from:
      _main in 01_system_info-fe7cb9.o
  "_uv_strerror", referenced from:
      _main in 01_system_info-fe7cb9.o
  "_uv_uptime", referenced from:
      _main in 01_system_info-fe7cb9.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Hi, everybody.
Sorry to trouble you, but I got problem when I played with your 'games'.
When I running my program(even your exercise answers), they all got "segmentation fault", I tracked them and found it should be here:
/* 4. Report the contents of the buffer */
log_report("%s", read_req->bufs->base);
log_info("%s", read_req->bufs->base);

because when it come into the callback, read_req->bufs turned to NULL, but I can use
read_req->bufsml->base to make it work.

I'm not sure if it's supposed to be left as an exercise to the user, but I had to make a small off-topic modification to the buffer allocation to make this work. The reason was that the buffer doesn't have a null terminator as created, and it needs one for the log_report() and log_info() calls.

I fixed it by adding this, but the null terminator could be added in other ways, I suppose:

  char buf[BUF_SIZE + 1];
  memset(buf, 0, sizeof(buf));

Hi I am using Node v8.11.3. I can't build the project.
I also tried to build using Xcode, but after build ./learnuv not works.

Awesome job on this workshopper. Have a question/suggestion regarding possibility to have it simple npm i -g learnuv since it can use node-gyp for building. AFAIK, it needs just adding proper install command and nodegyp flag set in package.json
What do you think about this?

Env:

      -+ssssssssssssssssssyyssss+-         OS: Ubuntu 18.04.6 LTS x86_64 
    .ossssssssssssssssssdMMMNysssso.       Host: Google Compute Engine 
   /ssssssssssshdmmNNmmyNMMMMhssssss/      Kernel: 5.4.0-1106-gcp 
  +ssssssssshmydMMMMMMMNddddyssssssss+     Uptime: 4 mins 
 /sssssssshNMMMyhhyyyyhmNMMMNhssssssss/    Packages: 698 
.ssssssssdMMMNhsssssssssshNMMMdssssssss.   Shell: bash 4.4.20 
+sssshhhyNMMNyssssssssssssyNMMMysssssss+   Terminal: /dev/pts/0 
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   CPU: Intel Xeon (2) @ 2.199GHz 
ossyNMMMNyMMhsssssssssssssshmmmhssssssso   Memory: 284MiB / 3928MiB 

re4388001@instance-0:~/learnuv$ env | grep PY
PYTHON=/usr/bin/python


re4388001@instance-0:~/learnuv$ python --version
Python 2.7.17

Error reproduce:

1. git clone the repo
2. npm i
3. ./learnuv and select the first one
4. ./learnuv make

$ ./learnuv make

> [email protected] make /home/re4388/pjt/node/learnuv
> ./gyp_learnuv.py -f make && make -C out $CURRENT_TARGET

You need to install gyp in build/gyp first. See the README.
npm ERR! code ELIFECYCLE
npm ERR! errno 42
npm ERR! [email protected] make: `./gyp_learnuv.py -f make && make -C out $CURRENT_TARGET`
npm ERR! Exit status 42
npm ERR!
npm ERR! Failed at the [email protected] make script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /home/re4388/.npm/_logs/2023-09-03T01_17_58_172Z-debug.log