Copy task expand() transforms "\n" into newlines

[cdalexndr]

Consider the input some configuration file that contains the following text in some json:
"SELECT\n count(id) AS idc\nFROM dev.product"

Apply the following copy task with expand:

task copyTest(type: Copy) {
    from 'test'
    into "$buildDir/test"
    expand()
}

The text is transformed into an invalid json:

"SELECT
  count(id) AS idc
FROM dev.product"

---

Gradle 5.5.1

Build time: 2019-07-10 20:38:12 UTC
Revision: 3245f74

Kotlin: 1.3.31
Groovy: 2.5.4
Ant: Apache Ant(TM) version 1.9.14 compiled on March 12 2019
JVM: 12.0.2 (Oracle Corporation 12.0.2+10)
OS: Windows 10 10.0 amd64

[cdalexndr]

Workaround: escaped "\\n" string instead of "\n"

[cdalexndr]

Same behaviour with "\t"

[big-guy]

expand() makes Gradle treat every file copied as if it's a template. It's run through Groovy's SimpleTemplateEngine.

If you don't want this behavior for some files, you can exclude them and copy them separately or escape the files (like you found).

[cdalexndr]

SimpleTemplateEngine has an option to escape backslashes:
SimpleTemplateEngine.setEscapeBackslash​(boolean escapeBackslash)

Turning on this option fixes my issue: online script
Please provide a method to turn on this option when using expand

[cdalexndr]

Opened feature request: #10492

[ljacomet]

While this was closed as "won't fix", the linked issue (#10492) ended up being fixed in 7.2