使用sed -r替换文件的shell字符串

Question

sed -i  $'/<!--Change here-->/ {r ${TEST_DIRECTORY}/check.html\n d}' "${TEST_DIRECTORY}"/result.html

以上sed文件读取未取实际值${TEST_DIRECTORY}

{r ${TEST_DIRECTORY}/check.html\n d}

但它适用于实际值

{r dir1/dir2/check.html\n d}

Answer 1

单引号内的变量不会被Bourne shell扩展。改为使用双引号：

sed -i  $'/<!--Change here-->/ {r '"${TEST_DIRECTORY}"$'/check.html\n d}' "${TEST_DIRECTORY}"/result.html

Answer 2

您需要双重报价如下： -

sed -i  $"/<!--Change here-->/ {r ${TEST_DIRECTORY}/check.html\n d}' ${TEST_DIRECTORY}/result.html"