Fix last modified date issue

.github/workflows/deploy.yml

@@ -11,6 +11,7 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: true
+        fetch-depth: 0
 
     - name: Set up Node.js
       uses: actions/setup-node@v2

scripts/pre-build/library/getExampleLastModifiedDate.js

@@ -0,0 +1,52 @@
+const path = require("path");
+const { exec } = require("child_process");
+const { format } = require("date-fns");
+const { rewriteRelativePath } = require("./rewritePath");
+
+const getExampleLastModifiedDate = async ({ html, sourcePath }) => {
+  const getFileLastModifiedDate = async (sourcePath) => {
+    const output = await new Promise((resolve) => {
+      exec(
+        `git log -1 --pretty="format:%cI" ${path.basename(sourcePath)}`,
+        { cwd: path.dirname(sourcePath) },
+        (error, stdout, stderr) => {
+          resolve(stdout);
+        }
+      );
+    });
+    let date;
+    try {
+      date = new Date(output);
+    } catch (error) {
+      console.error(
+        `Failed to extract a last-modified date for the file "${sourcePath}"`
+      );
+      throw error;
+    }
+    return date;
+  };
+
+  const dependencyFilePaths = html
+    .querySelectorAll("#css_js_files a")
+    .map(
+      (link) =>
+        rewriteRelativePath(link.getAttribute("href"), {
+          onSourcePath: sourcePath,
+        }).sourcePath
+    )
+    .concat(sourcePath);
+
+  const dates = await Promise.all(
+    dependencyFilePaths.map((filePath) => getFileLastModifiedDate(filePath))
+  );
+
+  dates.sort((a, b) => b - a);
+
+  const mostRecent = dates[0];
+
+  const dateFormatted = format(mostRecent, "d MMMM y");
+
+  return dateFormatted;
+};
+
+module.exports = getExampleLastModifiedDate;

scripts/pre-build/library/rewritePath.js

@@ -142,7 +142,7 @@ const rewriteRelativePath = (
   const siteRootPath = `${siteRootPathPreHash}${hashFormatted}`;
   const siteRelativePath = `${siteRelativePathPreHash}${queryStringFormatted}${hashFormatted}`;
 
-  return { siteRelativePath, siteRootPath, buildPath };
+  return { siteRelativePath, siteRootPath, sourcePath, buildPath };
 };
 
 module.exports = {

scripts/pre-build/library/transformExample.js

@@ -1,14 +1,13 @@
 const fs = require("fs/promises");
 const path = require("path");
-const { exec } = require("child_process");
 const { parse: parseHtml } = require("node-html-parser");
-const { format } = require("date-fns");
 const formatForJekyll = require("./formatForJekyll");
 const { rewriteSourcePath, sourceRoot } = require("./rewritePath");
 const rewriteElementPaths = require("./rewriteElementPaths");
 const removeDuplicateMainTag = require("./removeDuplicateMainTag");
 const wrapTablesWithResponsiveDiv = require("./wrapTablesWithResponsiveDiv");
 const removeConflictingCss = require("./removeConflictingCss");
+const getExampleLastModifiedDate = require("./getExampleLastModifiedDate");
 
 const loadNotice = async () => {
   const relativePath = "content/shared/templates/example-usage-warning.html";
@@ -31,28 +30,6 @@ const loadNotice = async () => {
 
 const loadedNotice = loadNotice();
 
-const getLastModifiedDate = async (exampleFilePath) => {
-  const output = await new Promise((resolve) => {
-    exec(
-      `git log -1 --pretty="format:%cI" ${path.basename(exampleFilePath)}`,
-      { cwd: path.dirname(exampleFilePath) },
-      (error, stdout, stderr) => {
-        resolve(stdout);
-      }
-    );
-  });
-  let dateFormatted;
-  try {
-    dateFormatted = format(new Date(output), "d MMMM y");
-  } catch (error) {
-    console.error(
-      `Failed to extract a last-modified date for the file "${exampleFilePath}"`
-    );
-    throw error;
-  }
-  return dateFormatted;
-};
-
 const transformExample = async (sourcePath, sourceContents) => {
   const { sitePath, githubPath } = rewriteSourcePath(sourcePath);
   const html = parseHtml(sourceContents);
@@ -62,7 +39,10 @@ const transformExample = async (sourcePath, sourceContents) => {
 
   removeConflictingCss(html);
 
-  const lastModifiedDateFormatted = await getLastModifiedDate(sourcePath);
+  const lastModifiedDateFormatted = await getExampleLastModifiedDate({
+    html,
+    sourcePath,
+  });
 
   await rewriteElementPaths(html, { onSourcePath: sourcePath });