Add configuration to include specific special characters while indexing

CHANGELOG.md

@@ -9,6 +9,7 @@
 
 ## Unreleased
 
+* Added the "Include Characters" option
 * Added the Pagefind Playground
 * Reduced filesizes for the Pagefind WebAssembly
 

docs/content/docs/config-options.md

@@ -71,6 +71,23 @@ Note that currently Pagefind only supports lists of options via configuration fi
 |---------------------------|------------------------------|---------------------|
 | `--exclude-selectors <S>` | `PAGEFIND_EXCLUDE_SELECTORS` | `exclude_selectors` |
 
+### Include characters
+Prevents Pagefind from stripping the provided characters when indexing content.
+Allows users to search for words including these characters.
+
+See [Indexing special characters](/docs/indexing/#indexing-special-characters) for more documentation.
+
+Care is needed if setting this argument via the CLI, as special characters may be interpreted by your shell.
+Configure this via a [configuration file](/docs/config-sources/#config-files) if you encounter issues.
+
+```yml
+include_characters: "<>$"
+```
+
+| CLI Flag                   | ENV Variable                  | Config Key          |
+|----------------------------|-------------------------------|---------------------|
+| `--include-characters <S>` | `PAGEFIND_INCLUDE_CHARACTERS` | `include_characters` |
+
 ### Glob
 Configures the glob used by Pagefind to discover HTML files. Defaults to `**/*.{html}`.
 See [Wax patterns documentation](https://github.com/olson-sean-k/wax#patterns) for more details.
@@ -79,7 +96,7 @@ See [Wax patterns documentation](https://github.com/olson-sean-k/wax#patterns) f
 |-----------------|-----------------|------------|
 | `--glob <GLOB>` | `PAGEFIND_GLOB` | `glob`     |
 
-### Force Language
+### Force language
 Ignores any detected languages and creates a single index for the entire site as the provided language. Expects an ISO 639-1 code, such as `en` or `pt`.
 
 See [Multilingual search](/docs/multilingual/) for more details.
@@ -88,14 +105,14 @@ See [Multilingual search](/docs/multilingual/) for more details.
 |---------------------------|---------------------------|------------------|
 | `--force-language <LANG>` | `PAGEFIND_FORCE_LANGUAGE` | `force_language` |
 
-### Keep Index URL
+### Keep index URL
 Keeps `index.html` at the end of search result paths. By default, a file at `animals/cat/index.html` will be given the URL `/animals/cat/`. Setting this option to `true` will result in the URL `/animals/cat/index.html`.
 
 | CLI Flag           | ENV Variable     | Config Key       |
 |--------------------|------------------|------------------|
 | `--keep-index-url` | `KEEP_INDEX_URL` | `keep_index_url` |
 
-### Write Playground
+### Write playground
 Writes the Pagefind playground files to `/playground` within your bundle directory. For most sites, this will make the Pagefind playground available at `/pagefind/playground/`.
 
 This defaults to false, so playground files are not written to your live site. Playground files are always available when running Pagefind with `--serve`.

docs/content/docs/indexing.md

@@ -92,5 +92,25 @@ Attributes of HTML elements can be added to the search index with the `data-page
 ```
 {{< /diffcode >}}
 
-This attribute takes a comma-separated list of other attributes to include inline with the indexed content.  
+This attribute takes a comma-separated list of other attributes to include inline with the indexed content.
 The above example will be indexed as: `Condimentum Nullam. Image Title. Image Alt. Nullam id dolor id nibh ultricies.`
+
+## Indexing special characters
+
+By default, Pagefind strips most punctuation out of the page when indexing content. Punctuation is also removed from the search term when searching.
+
+For some sites, such as documentation for programming languages, searching for punctuation can be important. In these cases,
+the default behavior can be changed using the [Include Characters](/docs/config-options/#include-characters) option when running Pagefind.
+
+For example, given the following HTML:
+
+```html
+<p>The &lt;head&gt; tag</p>
+```
+
+Pagefind's default indexing would index `the`, `head`, and `tag`,
+and a user typing in a search term of `<head>` will have their search adapted to `head`.
+While this will still match the correct page, it won't distinguish between this result and a result talking about the head of a git repository.
+
+With the [Include Characters](/docs/config-options/#include-characters) option set to `<>`, Pagefind will instead index `the`, `<head>`, `head`, and `tag`.
+A search for `head` will still locate this page, while a search for `<head>` won't be rewritten and will specifically match this page.

pagefind/integration_tests/characters/pagefind-matches-custom-characters.toolproof.yml

@@ -0,0 +1,39 @@
+name: Character Tests > Pagefind matches custom characters
+steps:
+  - ref: ./background.toolproof.yml
+  - step: I have a "public/page_a/index.html" file with the content {html}
+    html: >-
+      <!DOCTYPE html><html lang="en"><head></head><body><h1>Talking about @money</h1></body></html>
+  - step: I have a "public/page_b/index.html" file with the content {html}
+    html: >-
+      <!DOCTYPE html><html lang="en"><head></head><body><h1>Configure a^b^c^d</h1></body></html>
+  - macro: I run Pagefind with '--include-characters "@^"'
+  - step: stdout should contain "Running Pagefind"
+  - step: The file "public/pagefind/pagefind.js" should not be empty
+  - step: I serve the directory "public"
+  - step: In my browser, I load "/"
+  - step: In my browser, I evaluate {js}
+    js: |-
+      let pagefind = await import("/pagefind/pagefind.js");
+      let search = await pagefind.search("@");
+      let pages = await Promise.all(search.results.map(r => r.data()));
+
+      toolproof.assert_eq(pages.length, 1);
+      toolproof.assert_eq(pages[0].url, "/page_a/");
+  - step: In my browser, I evaluate {js}
+    js: |-
+      let pagefind = await import("/pagefind/pagefind.js");
+      let search = await pagefind.search("money");
+      let pages = await Promise.all(search.results.map(r => r.data()));
+
+      toolproof.assert_eq(pages.length, 1);
+      toolproof.assert_eq(pages[0].url, "/page_a/");
+  - step: In my browser, I evaluate {js}
+    js: |-
+      let pagefind = await import("/pagefind/pagefind.js");
+      let search = await pagefind.search("a^b^c^d");
+      let pages = await Promise.all(search.results.map(r => r.data()));
+
+      toolproof.assert_eq(pages.length, 1);
+      toolproof.assert_eq(pages[0].url, "/page_b/");
+  - step: In my browser, the console should be empty