如何在 BASH 到运行 julia 命令中的 heredoc 函数中使用变量的值

Question

我是 BASH 和 Julia 的新手，我正在尝试执行以下步骤：

在变量中保存文件路径
在 julia 命令中使用这个变量，我通过使用 heredoc 函数 bash 设法执行了该命令

有效的硬编码命令：

cat << "EOF" | julia --project=.
module test
            ARGS=["/path/To/My/Directory"]
            include("nameOfMyProject.jl")
            end
EOF

问题是，我想用变量值交换硬编码路径。我试过了：

path="/path/To/My/Directory"
cat << "EOF" | julia --project=.
module test
            ARGS=[$path]
            include("nameOfMyProject.jl")
            end
EOF

但是，这不起作用。我读到我应该尝试使用 <

针对此问题的解决方法：如果其他人有同样的问题，我将此添加以供参考。可以很好地解决问题的格式是：

path="/path/To/My/Directory"
julia --project=. <<EOF
module test
            ARGS=["$path"]
            include("nameOfMyProject.jl")
            end
EOF

感谢 Jetchisel 和 Jens

Answer 1

来自 bash 手册（强调我的）：

Here Documents

This type of redirection instructs the shell to read input from the current source until a line containing only delimiter (with no trailing blanks) is seen. All of the lines read up to that point are then used as the standard input (or file descriptor n if n is specified) for a command.

   The format of here-documents is:

          [n]<<[-]word
                  here-document
          delimiter

No parameter and variable expansion, command substitution, arithmetic expansion, or pathname expansion is performed on word. If any part of word is quoted, the delimiter is the result of quote removal on word, and the lines in the here-document are not expanded. If word is unquoted, all lines of the here-document are subjected to parameter expansion, command substitution, and arithmetic expansion, the character sequence \<newline> is ignored, and \ must be used to quote the characters \, $, and `.

所以你只需要

julia --project=. << EOF
...$FOO...
EOF

如何在 BASH 到运行 julia 命令中的 heredoc 函数中使用变量的值

How to use the value of a variable in a heredoc function in BASH to run a julia command

bash

heredoc

eof

julia

如何在 BASH 到 运行 julia 命令中的 heredoc 函数中使用变量的值

How to use the value of a variable in a heredoc function in BASH to run a julia command

bash

heredoc

eof

julia

如何在 BASH 到运行 julia 命令中的 heredoc 函数中使用变量的值