fix: allow docgen to handle a subplot not in current directory

Sponsored-by: author

2 files changed, 31 insertions, 1 deletions

diff --git a/src/bin/subplot.rs b/src/bin/subplot.rs
index b95b550..b23f858 100644
--- a/src/bin/subplot.rs
+++ b/src/bin/subplot.rs
@@ -265,8 +265,14 @@ impl Docgen {
             date.to_string()
         } else {
             let mut newest = None;
+            let basedir = if let Some(basedir) = self.input.parent() {
+                basedir.to_path_buf()
+            } else {
+                return Err(SubplotError::BasedirError(self.input.clone()).into());
+            };
             for filename in doc.meta().markdown_filenames() {
-                let mtime = Self::mtime(filename)?;
+                let filename = basedir.join(filename);
+                let mtime = Self::mtime(&filename)?;
                 if let Some(so_far) = newest {
                     if mtime > so_far {
                         newest = Some(mtime);
diff --git a/subplot.md b/subplot.md
index ae0aa78..bb4bd75 100644
--- a/subplot.md
+++ b/subplot.md
@@ -3560,3 +3560,27 @@ markdowns:
 ~~~{#foo.txt .file add-newline=xyzzy}
 ~~~
 ~~~~~~
+
+## Running Subplot
+
+The scenarios in this section verify that the Subplot tool can be run
+in various specific ways.
+
+### Files not in current working directory
+
+_Requirement: Subplot can process a subplot that is not in the current
+working directory._
+
+~~~scenario
+given file x/simple.subplot from simple.subplot
+given file x/simple.md from simple.md
+given file x/b.yaml from b.yaml
+given file x/f.py from f.py
+given an installed subplot
+when I run subplot metadata x/simple.subplot
+then command is successful
+when I run subplot codegen x/simple.subplot -o test.py
+then file test.py exists
+when I run subplot docgen x/simple.subplot -o simple.html
+then file simple.html exists
+~~~