Conan tools.patch cant create files #5320

0001-add-hello.patch

From 07c11b22182c88cc9941f52017203a2c679201b0 Mon Sep 17 00:00:00 2001
From: Uilian Ries <uilianries@gmail.com>
Date: Tue, 11 Jun 2019 11:01:18 -0300
Subject: [PATCH 2/2] patch


diff --git a/0001-add-patch.patch b/0001-add-patch.patch
new file mode 100644
index 0000000..54180a4
--- /dev/null
+++ b/0001-add-patch.patch
@@ -0,0 +1,17 @@
+diff --git a/hello.cpp b/hello.cpp
+new file mode 100644
+index 0000000..9888e50
+--- /dev/null
++++ b/hello.cpp
+@@ -0,0 +1,10 @@
++#include <iostream>
++#include "hello.h"
++
++void hello(){
++    #ifdef NDEBUG
++    std::cout << "Hello World Release!" <<std::endl;
++    #else
++    std::cout << "Hello World Debug!" <<std::endl;
++    #endif
++}
+\ No newline at end of file
-- 
2.21.0

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
project(MyHello CXX)

include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup()

add_library(hello hello.cpp)

conan.log

conan create . uilianries/testing
[HOOK - conan-center.py] pre_export(): [GLOBAL CPPSTD DEPRECATED] OK
[HOOK - conan-center.py] pre_export(): [REFERENCE LOWERCASE] OK
[HOOK - conan-center.py] pre_export(): [RECIPE METADATA] OK
[HOOK - conan-center.py] pre_export(): [HEADER ONLY] OK
[HOOK - conan-center.py] pre_export(): [NO COPY SOURCE] OK
[HOOK - conan-center.py] pre_export(): WARN: [FPIC OPTION] This recipe does not include an 'fPIC' option. Make sure you are using the right casing
[HOOK - conan-center.py] pre_export(): [FPIC OPTION] OK
[HOOK - conan-center.py] pre_export(): [FPIC MANAGEMENT] 'fPIC' option not found
[HOOK - conan-center.py] pre_export(): [FPIC MANAGEMENT] OK
[HOOK - conan-center.py] pre_export(): [VERSION RANGES] OK
[HOOK - conan-center.py] pre_export(): [RECIPE FOLDER SIZE] total_size_kb: 27.68359375KB
[HOOK - conan-center.py] pre_export(): [RECIPE FOLDER SIZE] OK
Exporting package recipe
foo/0.1@uilianries/testing exports_sources: Copied 1 '.txt' file: CMakeLists.txt
foo/0.1@uilianries/testing exports_sources: Copied 1 '.h' file: hello.h
foo/0.1@uilianries/testing exports_sources: Copied 1 '.cpp' file: hello.cpp
foo/0.1@uilianries/testing exports_sources: Copied 1 '.patch' file: 0001-add-patch.patch
foo/0.1@uilianries/testing: The stored package has not changed
Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=gcc
compiler.libcxx=libstdc++11
compiler.version=8
os=Linux
os_build=Linux
[options]
[build_requires]
[env]

foo/0.1@uilianries/testing: Forced build from source
Installing package: foo/0.1@uilianries/testing
Requirements
    foo/0.1@uilianries/testing from local cache - Cache
Packages
    foo/0.1@uilianries/testing:b80d46004713aa37d6a90b42e2a326a056a237b5 - Build

foo/0.1@uilianries/testing: Copying sources to build folder
foo/0.1@uilianries/testing: Building your package in /home/uilian/.conan/data/foo/0.1/uilianries/testing/build/b80d46004713aa37d6a90b42e2a326a056a237b5
foo/0.1@uilianries/testing: Generator cmake created conanbuildinfo.cmake
foo/0.1@uilianries/testing: Calling build()
WARN: patches/0001-add-patch.patch: error: absolute paths are not allowed - file no.1
WARN: patches/0001-add-patch.patch: stripping absolute path from source name 'b'/dev/null''
-- The CXX compiler identification is GNU 8.3.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: called by CMake conan helper
-- Conan: called inside local cache
-- Conan: Adjusting output directories
-- Conan: Using cmake global configuration
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Conan: Compiler GCC>=5, checking major version 8
-- Conan: Checking correct version: 8
-- Conan: C++ stdlib: libstdc++11
-- Configuring done
-- Generating done
CMake Warning:
  Manually-specified variables were not used by the project:

    CMAKE_EXPORT_NO_PACKAGE_REGISTRY
    CMAKE_INSTALL_BINDIR
    CMAKE_INSTALL_DATAROOTDIR
    CMAKE_INSTALL_INCLUDEDIR
    CMAKE_INSTALL_LIBDIR
    CMAKE_INSTALL_LIBEXECDIR
    CMAKE_INSTALL_OLDINCLUDEDIR
    CMAKE_INSTALL_SBINDIR


-- Build files have been written to: /home/uilian/.conan/data/foo/0.1/uilianries/testing/build/b80d46004713aa37d6a90b42e2a326a056a237b5
Scanning dependencies of target hello
[ 50%] Building CXX object CMakeFiles/hello.dir/hello.cpp.o
[100%] Linking CXX static library lib/libhello.a
[100%] Built target hello
foo/0.1@uilianries/testing: Package 'b80d46004713aa37d6a90b42e2a326a056a237b5' built
foo/0.1@uilianries/testing: Build folder /home/uilian/.conan/data/foo/0.1/uilianries/testing/build/b80d46004713aa37d6a90b42e2a326a056a237b5
foo/0.1@uilianries/testing: Generated conaninfo.txt
foo/0.1@uilianries/testing: Generated conanbuildinfo.txt
foo/0.1@uilianries/testing: Generating the package
foo/0.1@uilianries/testing: Package folder /home/uilian/.conan/data/foo/0.1/uilianries/testing/package/b80d46004713aa37d6a90b42e2a326a056a237b5
foo/0.1@uilianries/testing: Calling package()
foo/0.1@uilianries/testing package(): Packaged 1 '.h' file: hello.h
foo/0.1@uilianries/testing package(): Packaged 1 '.a' file: libhello.a
foo/0.1@uilianries/testing: Package 'b80d46004713aa37d6a90b42e2a326a056a237b5' created
[HOOK - conan-center.py] post_package(): ERROR: [PACKAGE LICENSE] No 'licenses' folder found in package: /home/uilian/.conan/data/foo/0.1/uilianries/testing/package/b80d46004713aa37d6a90b42e2a326a056a237b5 
[HOOK - conan-center.py] post_package(): [DEFAULT PACKAGE LAYOUT] OK
[HOOK - conan-center.py] post_package(): [MATCHING CONFIGURATION] OK
[HOOK - conan-center.py] post_package(): [SHARED ARTIFACTS] OK
[HOOK - conan-center.py] post_package(): [CMAKE MODULES/PC-FILES] OK
[HOOK - conan-center.py] post_package(): [PDB FILES NOT ALLOWED] OK
[HOOK - conan-center.py] post_package(): [LIBTOOL FILES PRESENCE] OK
foo/0.1@uilianries/testing: Created package revision d7d8dbeac6120026d5c90bf64135152e

conanfile.py

from conans import ConanFile, CMake, tools


class FooConan(ConanFile):
    name = "foo"
    version = "0.1"
    license = "<Put the package license here>"
    author = "<Put your name here> <And your email here>"
    url = "<Package recipe repository url here, for issues about the package>"
    description = "<Description of Foo here>"
    topics = ("<Put some tag here>", "<here>", "<and here>")
    settings = "os", "compiler", "build_type", "arch"
    options = {"shared": [True, False]}
    default_options = "shared=False"
    generators = "cmake"
    exports_sources = "*"

    def build(self):
        tools.patch(patch_file="0001-add-hello.patch", strip=1)
        cmake = CMake(self)
        cmake.configure()
        cmake.build()

        # Explicit way:
        # self.run('cmake %s/hello %s'
        #          % (self.source_folder, cmake.command_line))
        # self.run("cmake --build . %s" % cmake.build_config)

    def package(self):
        self.copy("*.h", dst="include")
        self.copy("*.lib", dst="lib", keep_path=False)
        self.copy("*.dll", dst="bin", keep_path=False)
        self.copy("*.dylib*", dst="lib", keep_path=False)
        self.copy("*.so", dst="lib", keep_path=False)
        self.copy("*.a", dst="lib", keep_path=False)

    def package_info(self):
        self.cpp_info.libs = ["hello"]

hello.h

#pragma once

#ifdef WIN32
  #define HELLO_EXPORT __declspec(dllexport)
#else
  #define HELLO_EXPORT
#endif

HELLO_EXPORT void hello();

Python patch is not able to apply 0001-add-patch, but you can apply manually by git apply