conan | Conan - The open-source C and C++ package manager
kandi X-RAY | conan Summary
kandi X-RAY | conan Summary
Conan - The open-source C and C++ package manager
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Top functions reviewed by kandi - BETA
- Program entry point .
- Export the conan file
- Executes a deps install
- Creates a new ref from a ref
- Get item data from the deps graph
- Get the definitions for the cmake_version .
- Prints the information to the output .
- Download a file .
- Unzip a file .
- Retrieves a native version of the given architecture .
conan Key Features
conan Examples and Code Snippets
Community Discussions
Trending Discussions on conan
QUESTION
I'm trying to use
conan export-pkg . hello/0.1@myuser/testing
command following the tutorial from https://docs.conan.io/en/latest/creating_packages/existing_binaries.html. But conan
keeps showing this error message:
ERROR: Specify the 'user' and the 'channel' or neither of them
.
It doesn't make any difference if I remove both user
and channel
.
I tried:
conan export-pkg . hello/0.1
conan export-pkg . hello
conan export-pkg .
And I got the same error every time. What is this error message about and how can be resolved? What am I doing wrong?
My conan
version is: 1.29.0
ANSWER
Answered 2022-Mar-31 at 20:20I've been able to work around this problem after submitting an issue to the Conan developers.
I had changed the storage.path
setting in my conan.conf
to a top-level folder of drive D:\
:
QUESTION
While trying to follow along Conan's Getting Started guide for creating packages, I got stuck trying to run conan create . demo/testing
. It continuously tries to use MinGW Makefiles
as the CMake generator, but I'd like to use Ninja instead.
My recipe is as follows:
...ANSWER
Answered 2022-Mar-25 at 08:27You are following the method signature to CMake helper imported directly from conans
. However, you imported the new CMake helper designed to Conan 2.0. They are incompatible.
You can keep the new helper, but you need to define your generator in conanbuild.conf
. (Yet not documented)
However, you also can set it directly in your CMakeToolchain constructor:
QUESTION
- I have this database for a CS/database-theory homework question for a hypothetical movie store company:
- For those who might be unfamiliar with the concept, a movie store is a retail location where patrons can film productions on VHS tape, or this newfangled format called "DVD".
- Who knows, maybe some time in the distant, far-off, future we might be able to view movies directly over the Internet?
- The DDL and sample data is below.
- For those who might be unfamiliar with the concept, a movie store is a retail location where patrons can film productions on VHS tape, or this newfangled format called "DVD".
- I need to write a query that will show all movies that are available in all three Chicago stores: (
WI01
,WI02
, andWI03
).- By looking at the raw data below ourselves, we can see that only these 3
movieId
values (D00001
,D00006
, andD00007
) havemovie_store
rows for everystore
located in Chicago.
- By looking at the raw data below ourselves, we can see that only these 3
ANSWER
Answered 2022-Mar-11 at 06:01It appears I had the wrong idea about ALL. I realized I could write my query this way to get the movies that appeared in all Chicago locations. Thanks for your help everyone.
QUESTION
I am trying to port a program from Linux to windows. The program is built with conan.
Currently I run:
...ANSWER
Answered 2022-Jan-05 at 16:13Settings are external, project wide configuration, they cannot be defined or assigned values in conanfile.py
files.
Settings are defined in your profile, like the "default", you can see it printed when you type conan install
, something like:
QUESTION
...
import tkinter
from tkinter import StringVar
adfl = ['Alan Alexander Milne', 'Alice Hoffman', 'Alicia Bay Laurel', 'Alison Weir', 'Alistair Cooke','Alycea Ungaro', 'Amanda Quick', 'Ann Durell', 'Anne De Courcy', 'Anne Kent Rush', 'Anne McCaffrey','Anne Purdy', 'Anne Rice', 'Anon', 'Antoine de Saint-Exupery', 'Anya Seton', 'Arthur Conan Doyle','Ashida Kim', 'Aubrey Beardsley', 'BBC', 'Barbara Ann Brennan', 'Barbara Walker', 'Bertrice Small','Betsy Bruce', 'C. S. Lewis', 'Caitlin Matthews', 'Carl Sagan', 'Carol Belanger Grafton', 'Carol Blackman','Carol Kisner', 'Caroline Foley', 'Carolyn Kisner', 'Catherine Coulter', 'Charles Greenstreet Addison','Charlotte Bronte', 'Chic Tabatha Cicero', 'Christina Dodd', 'Christopher Paolini', 'Clare Maxwell-Hudson','Clarissa Pinkola Estés', 'Co Spinhoven', 'D. J. Conway', 'D.H. Lawrence', 'Dan Brown','Daniel M. Mendelowitz', 'Deborah E. Harkness', 'Denise Dumars', 'Denys Hay', 'Diana Gabaldon','Diana L. Paxson', 'Dinah Lovett', 'Dion Fortune', 'Donald M. Anderson']
def update_list(*args):
frame1_lb.delete(0, 'end')
search_term = ent_var.get()
for item in adfl:
if search_term.lower() in item.lower():
frame1_lb.insert('end', item)
return
def author_list():
# Clear entry box
ent_var.set("")
frame1.configure(text='Author')
frame1_list.set(adfl)
# Set up trace for list update, only need this one instance to make work
ent_var.trace("w", update_list)
frame1_lb.bind('<>', sauthor_list)
def sauthor_list(self):
caut = frame1_lb.curselection()
print(caut)
saut = adfl[caut[0]]
print(saut)
##########
window = tkinter.Tk()
window.geometry("600x900")
window.resizable(width=False, height=False)
window.wm_title("My Book Library")
window.configure(bg='#5e84d4')
window.update_idletasks()
# Gets the requested values of the height and widht.
windowWidth = window.winfo_width()
windowHeight = window.winfo_height()
# Gets both half the screen width/height and window width/height
positionRight = int((window.winfo_screenwidth() / 2) - windowWidth / 2)
positionDown = int((window.winfo_screenheight() / 2) - windowHeight / 2)
# Positions the window in the center of the page.
window.geometry("+{}+{}".format(positionRight, positionDown))
# Layout of frames
frame1 = tkinter.LabelFrame(window, text='', bg='lightblue')
frame1.place(relx=0.010, rely=0.10, relheight=0.890, relwidth=0.500)
frame1.configure(relief='groove')
frame1.configure(borderwidth="2")
frame1_list = StringVar()
frame1_lb = tkinter.Listbox(frame1, listvariable=frame1_list, width=40, height=44)
frame1_lb.place(x=0.0, y=0.30)
frame1_sb = tkinter.Scrollbar(frame1, orient=tkinter.VERTICAL)
frame1_lb.config(yscrollcommand=frame1_sb.set, bg='white')
frame1_sb.pack(side=tkinter.RIGHT, fill=tkinter.Y)
frame1_sb.config(command=frame1_lb.yview)
frame1a = tkinter.LabelFrame(window, text="Enter letters - for search")
frame1a.configure(border=2, relief='groove')
frame1a.place(relx=0.010, rely=0.05, relheight=0.05, relwidth=0.500)
ent_var = StringVar()
frame1_ent = tkinter.Entry(frame1a, textvariable=ent_var, width=40, bg='white')
frame1_ent.place(x=0.0, rely=0.0)
search_term = ent_var.get()
author_list()
window.mainloop()
...
...ANSWER
Answered 2022-Feb-22 at 01:46You use the wrong source for showing the selected item. As the shortened list is not the same as adfl
, you should not use adfl
inside sauthor_list()
. You need to get the selected item using frame1_lb.get()
instead:
QUESTION
If you build a library with conan and set compiler.cppstd
setting to e.g. 20
and call conan install
, the libraries are still built with the default standard for the given compiler.
The docs say:
The value of compiler.cppstd provided by the consumer is used by the build helpers:
- The CMake build helper will set the CONAN_CMAKE_CXX_STANDARD and CONAN_CMAKE_CXX_EXTENSIONS definitions that will be converted to the corresponding CMake variables to activate the standard automatically with the conan_basic_setup() macro.
So it looks like you need to call conan_basic_setup()
to activate this setting. But how do I call it? By patching a library's CMakeLists.txt? I sure don't want to do that just to have the proper standard version used. I can see some recipes that manually set the CMake definition based on the setting, e.g.:
- https://github.com/conan-io/conan-center-index/blob/master/recipes/folly/all/conanfile.py#L117
- https://github.com/conan-io/conan-center-index/blob/master/recipes/crc32c/all/conanfile.py#L58
- https://github.com/conan-io/conan-center-index/blob/master/recipes/azure-storage-cpp/all/conanfile.py#L71
- https://github.com/conan-io/conan-center-index/blob/master/recipes/caf/all/conanfile.py#L105
But this feels like a hack either. So what is the proper way to make sure libraries are built with the compiler.cppstd
I specified?
ANSWER
Answered 2022-Feb-17 at 14:15Avoid patching, it's ugly and fragile, for each new release you will need an update due upstream's changes.
The main approach is a CMakeLists.txt as wrapper, as real example: https://github.com/conan-io/conan-center-index/blob/5f77986125ee05c4833b0946589b03b751bf634a/recipes/proposal/all/CMakeLists.txt and there many others.
QUESTION
I have just started using conan from my cmake files to download and build dependencies - very convenient. I have tried using it also for Boost, but the default conanfile for boost does not seem to build boost python which I need. My current setup looks like:
...ANSWER
Answered 2022-Feb-14 at 19:18you can use the OPTIONS
variable of conan_cmake_configure
:
QUESTION
I am trying to build on windows using meson and conan.
I installed packages for VS 2017 using conan and generated the PC files in the build directory.
Inside my conan.py I have the snippet:
...ANSWER
Answered 2022-Jan-18 at 13:35Try specify instead -Dbuild.pkg_config_path=... from this
Since 0.51.0, some options are specified per machine rather than globally for all machine configurations. Prefixing the option with build. just affects the build machine configuration...
build.pkg_config_path controls the paths pkg-config will search for just native: true dependencies (build machine).
PS, the version of meson and that you have native build I deduced from your previous question ;)
QUESTION
I'm having trouble understanding how to use pybind11 conan package. I can use some others, but pybind11 is giving me hard time.
My starting point is as follows:
conanfile.txt:
...ANSWER
Answered 2021-Nov-08 at 15:48I have used pybind in the past (two or three years ago) and it worked without problems with conan. However, I tried to install it now and faced similar problems. This might be related to the evolution of conan towards conan 2.0 (an alpha version was released today) and that the recipe was not updated to account changes.
An alternative that you might consider, is to install pybind with conan using a different generator. More specifically, the CMakeDeps generator. With the CMakeDeps generator conan will create a pybind11-config.cmake
file for you and you just need to use find_package(pybind11 REQUIRED)
in CMakeLists.txt
. That is, there is no "conan specific stuff" in your CMakeLists.txt
file.
conanfile.txt
QUESTION
I want to defer the execution of a packaged task in a loop.
...ANSWER
Answered 2021-Dec-29 at 13:52By default a lambda's call operator is const
-qualified.
Inside the lambda's body the this
pointer to the lambda is therefore also const
-qualified and so is the member wrapper
.
std::packaged_task
does not have a const
-qualified operator()
, so it cannot be called.
You can make the lambda's operator()
non-const
-qualified by adding the mutable
keyword:
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Install conan
You can use conan like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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