命令，用于将行转换为CSV文件。

Question

我有一个格式的文件，每一行前面都有一个前导空格：

 "Western Overseas",
 "Western Overseas",
 "^",
 "--",
 "^",
 "--",
 "--",
 null,
 24995,
 9977,
 "CR",

 "Western Refrigeration Private Limited",
 "Western Refrigeration Private Limited",
 "[ICRA]A",
 "--",
 "[ICRA]A1",
 "--",
 "Stable",
 null,
 14951,
 2346,
 "CR",

我想把它转换成一个格式为CSV的文件：

 "Western Overseas","Western Overseas","^","--","^","--","--",null,24995,9977,"CR"
 "Western Refrigeration Private Limited","Western Refrigeration Private Limited","[ICRA]A","--","[ICRA]A1","--","Stable",null,14951,2346,"CR"

我正在尝试使用tr，但遇到了问题，因为它要么将所有输出打印到一行中，要么用双换行符替换换行符。任何帮助都是非常感谢的。

Answer 1

awk解决方案是

awk '{if(NF){gsub(/^ |,$/,""); printf c $0; c=","}else{printf "\n"; c=""}};END{printf "\n"}'

经评论后扩大：

{
    if(NF) { # if the line isn't empty
        gsub(/^ |,$/,""); # remove the first space and last comma
        printf c $0; # print the line (without a newline)
        c="," # set c to add a comma for the next field
    } else {
        printf "\n"; # empty line, output a newline
        c="" # don't print a comma for the next entry
    }
};
END {
    printf "\n" # finish off with a newline
}

Answer 2

第一个sed循环(:start、b start)并将行附加到其模式空间(N)，直到找到并删除最末端的换行符(s/\n$//)为止。这表示读取了空行，该工具退出循环，然后(t)。在每次迭代时，任何幸存的换行符(和一个连续的空格)都会被删除，以连接行(s/\n //)。

第二个sed移除后面的逗号。