CMake 字符串替换删除分号

Question

我有一个包含多个占位符的模板 cpp 文件。摘录：

// WARNING! this file is autogenerated, do not edit manually
QString appName()
{
  return "APP_NAME_VALUE";
}

Cmake 将读取此文件，填充占位符并将其写回影子构建目录以进行编译

set(APP_NAME "real application name")

file(READ ${CMAKE_SOURCE_DIR}/templates/app-info.cpp APP_INFO)
string(REPLACE "APP_NAME_VALUE" ${APP_NAME} APP_INFO ${APP_INFO})
# other tag replacements
file(WRITE "${CMAKE_BINARY_DIR}/src/app-info.cpp" ${APP_INFO})

但每次我运行 cmake 时，它似乎从文件内容中删除了分号。

// WARNING! this file is autogenerated, do not edit manually
QString appName()
{
  return "real application name"
}

这是预期的行为吗？我能做些什么来解决这个问题？

Answer 1

来自https://discourse.cmake.org/t/what-is-the-best-way-to-search-and-replace-strings-in-a-file/1879

In my CMake script, I need to modify other source files by searching and replacing specified strings. In my case, the configure_file 2 command is not a solution because I have no control over the input file. Previously I used the file and string commands in the following way -

file(READ header.h FILE_CONTENTS)
string(REPLACE "old text" "new text" FILE_CONTENTS ${FILE_CONTENTS})
file(WRITE header.h ${FILE_CONTENTS})

However this technique appears to strip out semi-colons from the input file.

答案：在两个命令中用引号将 ${FILE_CONTENTS} 括起来

解释：

It comes from a CMake’s list syntax, which is ;-separated, the fact that arguments passed to CMake commands are basically mashed together into a list, and that those commands take unbounded number of inputs. So you end up with one longer list.

Quoting prevents the semicolons in the expansion from being treated as list-element-separators.

考虑：

WRITE;header.h;x;y;z

对

WRITE;header.h;"x;y;z"

因此在您的情况下，它将显示为：

set(APP_NAME "real application name")

file(READ ${CMAKE_SOURCE_DIR}/templates/app-info.cpp APP_INFO)
string(REPLACE "APP_NAME_VALUE" ${APP_NAME} APP_INFO "${APP_INFO}")
# other tag replacements
file(WRITE "${CMAKE_BINARY_DIR}/src/app-info.cpp" "${APP_INFO}")

CMake 字符串替换删除分号

CMake string replace removes semi-colon

c++

cmake