Support single string provide include as same as bare string

Found this missing case when writing docs. Specifiying `include:` as a single
string should be equivalent to specifying a bare string, which is already
treated as a one-element array.

Renaming only happens when as: is present, and we should support the
`include:` single string like a 1-element array, like the bare string case.

Signed-off-by: Robert Detjens <github@detjens.dev>

Author: detjensrobert

src/builder/artifacts.rs

@@ -41,6 +41,8 @@ pub async fn extract_asset(
     let extracted_files = match provide {
         // Repo file paths are relative to the challenge directory, so prepend chal dir
 
+        // No action necessary, return path as-is
+        ProvideConfig::FromRepoSingle { file } => Ok(vec![chal.directory.join(file)]),
         // No action necessary, return path as-is
         ProvideConfig::FromRepo { files } => {
             Ok(files.iter().map(|f| chal.directory.join(f)).collect_vec())

src/configparser/challenge.rs

@@ -262,6 +262,10 @@ enum ProvideConfig {
     /// Upload file(s) as-is.
     /// Single or multiple files with no as: or from:
     /// Default if only a string is given.
+    FromRepoSingle {
+        #[serde(rename = "include")]
+        file: PathBuf,
+    },
     FromRepo {
         #[serde(rename = "include")]
         files: Vec<PathBuf>,
@@ -315,8 +319,8 @@ enum ProvideConfig {
 impl FromStr for ProvideConfig {
     type Err = Void;
     fn from_str(s: &str) -> std::result::Result<Self, Self::Err> {
-        Ok(ProvideConfig::FromRepo {
-            files: vec![PathBuf::from(s)],
+        Ok(ProvideConfig::FromRepoSingle {
+            file: PathBuf::from(s),
         })
     }
 }

src/tests/parsing/challenges.rs

@@ -242,6 +242,8 @@ fn challenge_provide() {
             provide:
                 - foo.txt
 
+                - include: foo2.txt
+
                 - include:
                     - bar.txt
                     - baz.txt
@@ -275,8 +277,11 @@ fn challenge_provide() {
         assert_eq!(
             chals[0].provide,
             vec![
-                ProvideConfig::FromRepo {
-                    files: vec!["foo.txt".into()]
+                ProvideConfig::FromRepoSingle {
+                    file: "foo.txt".into()
+                },
+                ProvideConfig::FromRepoSingle {
+                    file: "foo2.txt".into()
                 },
                 ProvideConfig::FromRepo {
                     files: vec!["bar.txt".into(), "baz.txt".into()]