teach Issue to know what dir it lives in

The Issue struct is a cache of files on disk.  There is never an Issue
without a directory to live in.

This commit adds a field to Issue to track what that directory is, so
that we can update those filew when we change the Issue, and commit the
changes to git.

src/issue.rs

@@ -18,6 +18,10 @@ pub struct Issue {
     pub description: String,
     pub state: State,
     pub dependencies: Option<Vec<IssueHandle>>,
+
+    /// This is the directory that the issue lives in.  Only used
+    /// internally by the entomologist library.
+    pub dir: std::path::PathBuf,
 }
 
 #[derive(Debug, thiserror::Error)]
@@ -87,6 +91,7 @@ impl Issue {
             description: description.unwrap(),
             state: state,
             dependencies,
+            dir: std::path::PathBuf::from(dir),
         })
     }
 
@@ -110,6 +115,7 @@ mod tests {
             description: String::from("this is the title of my issue\n\nThis is the description of my issue.\nIt is multiple lines.\n* Arbitrary contents\n* But let's use markdown by convention\n"),
             state: State::New,
             dependencies: None,
+            dir: std::path::PathBuf::from(issue_dir),
         };
         assert_eq!(issue, expected);
     }
@@ -122,6 +128,7 @@ mod tests {
             description: String::from("minimal"),
             state: State::InProgress,
             dependencies: None,
+            dir: std::path::PathBuf::from(issue_dir),
         };
         assert_eq!(issue, expected);
     }

src/issues.rs

@@ -77,20 +77,30 @@ mod tests {
         let issues = Issues::new_from_dir(issues_dir).unwrap();
 
         let mut expected = Issues::new();
+
+        let uuid = String::from("7792b063eef6d33e7da5dc1856750c149ba678c6");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("7792b063eef6d33e7da5dc1856750c149ba678c6"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("minimal"),
                 state: crate::issue::State::InProgress,
                 dependencies: None,
+                dir,
             },
         );
+
+        let uuid = String::from("3943fc5c173fdf41c0a22251593cd476d96e6c9f");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("3943fc5c173fdf41c0a22251593cd476d96e6c9f"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("this is the title of my issue\n\nThis is the description of my issue.\nIt is multiple lines.\n* Arbitrary contents\n* But let's use markdown by convention\n"),
                 state: crate::issue::State::New,
                 dependencies: None,
+                dir,
             }
         );
         assert_eq!(issues, expected);
@@ -102,20 +112,30 @@ mod tests {
         let issues = Issues::new_from_dir(issues_dir).unwrap();
 
         let mut expected = Issues::new();
+
+        let uuid = String::from("3fa5bfd93317ad25772680071d5ac3259cd2384f");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("3fa5bfd93317ad25772680071d5ac3259cd2384f"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("oh yeah we got titles"),
                 state: crate::issue::State::Done,
                 dependencies: None,
+                dir,
             },
         );
+
+        let uuid = String::from("dd79c8cfb8beeacd0460429944b4ecbe95a31561");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("dd79c8cfb8beeacd0460429944b4ecbe95a31561"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("issues out the wazoo\n\nLots of words\nthat don't say much\nbecause this is just\na test\n"),
                 state: crate::issue::State::WontDo,
                 dependencies: None,
+                dir,
             },
         );
         assert_eq!(issues, expected);
@@ -127,24 +147,38 @@ mod tests {
         let issues = Issues::new_from_dir(issues_dir).unwrap();
 
         let mut expected = Issues::new();
+
+        let uuid = String::from("3fa5bfd93317ad25772680071d5ac3259cd2384f");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("3fa5bfd93317ad25772680071d5ac3259cd2384f"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("oh yeah we got titles\n"),
                 state: crate::issue::State::Done,
                 dependencies: None,
+                dir,
             },
         );
+
+        let uuid = String::from("dd79c8cfb8beeacd0460429944b4ecbe95a31561");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("dd79c8cfb8beeacd0460429944b4ecbe95a31561"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("issues out the wazoo\n\nLots of words\nthat don't say much\nbecause this is just\na test\n"),
                 state: crate::issue::State::WontDo,
                 dependencies: None,
+                dir,
             },
         );
+
+        let uuid = String::from("a85f81fc5f14cb5d4851dd445dc9744c7f16ccc7");
+        let mut dir = std::path::PathBuf::from(issues_dir);
+        dir.push(&uuid);
         expected.add_issue(
-            String::from("a85f81fc5f14cb5d4851dd445dc9744c7f16ccc7"),
+            uuid,
             crate::issue::Issue {
                 description: String::from("issue with dependencies\n\na test has begun\nfor dependencies we seek\nintertwining life"),
                 state: crate::issue::State::WontDo,
@@ -152,6 +186,7 @@ mod tests {
                     crate::issue::IssueHandle::from("3fa5bfd93317ad25772680071d5ac3259cd2384f"),
                     crate::issue::IssueHandle::from("dd79c8cfb8beeacd0460429944b4ecbe95a31561"),
                 ]),
+                dir,
             },
         );
         assert_eq!(issues, expected);