From 65d75b8bdcd7376916aed715d5e73732125589fb Mon Sep 17 00:00:00 2001
From: Olivér Falvai <ofalvai@gmail.com>
Date: Tue, 02 Jan 2024 17:23:28 +0000
Subject: [PATCH] feat: support modification date reading from parent git repo (#661)

---
 quartz/plugins/transformers/lastmod.ts |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/quartz/plugins/transformers/lastmod.ts b/quartz/plugins/transformers/lastmod.ts
index feca4b5..6e12616 100644
--- a/quartz/plugins/transformers/lastmod.ts
+++ b/quartz/plugins/transformers/lastmod.ts
@@ -57,10 +57,22 @@
                 published ||= file.data.frontmatter.publishDate
               } else if (source === "git") {
                 if (!repo) {
-                  repo = new Repository(file.cwd)
+                  // Get a reference to the main git repo.
+                  // It's either the same as the workdir,
+                  // or 1+ level higher in case of a submodule/subtree setup
+                  repo = Repository.discover(file.cwd)
                 }
 
-                modified ||= await repo.getFileLatestModifiedDateAsync(file.data.filePath!)
+                try {
+                  modified ||= await repo.getFileLatestModifiedDateAsync(file.data.filePath!)
+                } catch {
+                  console.log(
+                    chalk.yellow(
+                      `\nWarning: ${file.data
+                        .filePath!} isn't yet tracked by git, last modification date is not available for this file`,
+                    ),
+                  )
+                }
               }
             }
 

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