178 lines
6.2 KiB
Markdown
178 lines
6.2 KiB
Markdown
---
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title: Writing a New Post
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author: Cotes Chung
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date: 2019-08-08 14:10:00 +0800
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categories: [Blogging, Tutorial]
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tags: [writing]
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---
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## Naming and Path
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Create a new file named `YYYY-MM-DD-TITLE.EXTENSION` and put it in the `_post/` of the root directory. Please note that the `EXTENSION` must be one of `md` and `markdown`. From `v2.4.1`, you can create sub-directories under `_posts/` to categorize posts.
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## Front Matter
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Basically, you need to fill the [Front Matter](https://jekyllrb.com/docs/front-matter/) as below at the top of the post:
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```yaml
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---
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title: TITLE
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date: YYYY-MM-DD HH:MM:SS +/-TTTT
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categories: [TOP_CATEGORIE, SUB_CATEGORIE]
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tags: [TAG] # TAG names should always be lowercase
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---
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```
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> **Note**: The posts' ***layout*** has been set to `post` by default, so there is no need to add the variable ***layout*** in Front Matter block.
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### Timezone of date
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In order to accurately record the release date of a post, you should not only setup the `timezone` of `_config.yml` but also provide the the post's timezone in field `date` of its Front Matter block. Format: `+/-TTTT`, e.g. `+0800`.
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### Categories and Tags
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The `categories` of each post is designed to contain up to two elements, and the number of elements in `tags` can be zero to infinity.
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The list of posts belonging to the same *category*/*tag* is recorded on a separate page. At the same time, the number of these *category*/*tag* type pages is equal to the number of `categories` / `tags` elements for all posts, which means that the two number must be exactly the same.
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For instance, let's say there is a post with front matter:
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```yaml
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categories: [Animal, Insect]
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tags: bee
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```
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Then we should have two *category* type pages placed in folder `categories` of root and one *tag* type page placed in folder `tags` of root:
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```sh
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.
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├── categories
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│ ├── animal.html # a category type page
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│ └── insect.html
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├── tags
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│ └── bee.html # a tag type page
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...
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```
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and the content of a *category* type page is
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```yaml
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---
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layout: category
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title: CATEGORY_NAME # e.g. Insect
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category: CATEGORY_NAME # e.g. Insect
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---
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```
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the content of a *tag* type page is
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```yaml
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---
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layout: tag
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title: TAG_NAME # e.g. bee
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tag: TAG_NAME # e.g. bee
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---
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```
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With the increasing number of posts, the number of categories and tags will increase several times! If we still manually create these *category*/*tag* type files, it will obviously be a super time-consuming job, and it is very likely to miss some of them, i.e., when you click on the missing `category` or `tag` link from a post or somewhere, the browser will complain to you "404 Not Found". The good news is we got a lovely script tool `_scripts/sh/create_pages.sh` to finish the boring tasks. Basically we will use it via `run.sh`, `build.sh`, `deploy.sh` or `publish.sh` that placed in `tools/` instead of running it separately. Check out its use case [here]({{ "/posts/getting-started/#deployment" | relative_url }}).
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## Last modified date
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The last modified date of a post is obtained according to the post's latest git commit date, and the modified date of all posts are designed to be stored in the file `_data/updates.yml`. Then contents of that file may be as follows:
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```yaml
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-
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filename: getting-started # the post filename without date and extension
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lastmod: 2020-04-13 00:38:56 +0800 # the post last modified date
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-
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...
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```
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You can choose to create this file manually, But the better approach is to let it be automatically generated by a script tool, and `_scripts/sh/dump_lastmod.sh` was born for this! Similar to the other script (`create_pages.sh`) mentioned above, it is also be called from the other superior tools, so it doesn't have to be used separately.
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When some posts have been modified since their published date and also the file `_data/updates.yml` was created correctly, a list with the label **Recent Updates** will be displayed in the right panel of the desktop view, which records the five most recently modified posts.
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## Table of Contents
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By default, the **T**able **o**f **C**ontents (TOC) is displayed on the right panel of the post. If you want to turn it off globally, go to `_config.yml` and set the value of variable `toc` to `false`. If you want to turn off TOC for specific post, add the following to post's [Front Matter](https://jekyllrb.com/docs/front-matter/):
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```yaml
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---
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toc: false
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---
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```
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## Comments
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Similar to TOC, the [Disqus](https://disqus.com/) comments is loaded by default in each post, and the global switch is defined by variable `comments` in file `_config.yml` . If you want to close the comment for specific post, add the following to the **Front Matter** of the post:
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```yaml
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---
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comments: false
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---
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```
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## Mathematics
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For website performance reasons, the mathematical feature won't be loaded by default. But it can be enabled by:
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```yaml
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---
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math: true
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---
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```
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## Pinned Posts
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You can pin one or more posts to the top of the home page, and the fixed posts are sorted in reverse order according to their release date. Enable by:
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```yaml
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---
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pin: true
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---
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```
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## Code Block
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Markdown symbols <code class="highlighter-rouge">```</code> can easily create a code block as following examples.
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```
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This is a common code snippet, without syntax highlight and line number.
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```
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## Specific Language
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Using <code class="highlighter-rouge">```language</code> you will get code snippets with line Numbers and syntax highlight.
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> **Note**: The Jekyll style `{% raw %}{%{% endraw %} highlight LANGUAGE {% raw %}%}{% endraw %}` or `{% raw %}{%{% endraw %} highlight LANGUAGE linenos {% raw %}%}{% endraw %}` are not allowed to be used in this theme !
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```yaml
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# Yaml code snippet
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items:
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- part_no: A4786
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descrip: Water Bucket (Filled)
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price: 1.47
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quantity: 4
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```
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#### Liquid Codes
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If you want to display the **Liquid** snippet, surround the liquid code with `{% raw %}{%{% endraw %} raw {%raw%}%}{%endraw%}` and `{% raw %}{%{% endraw %} endraw {%raw%}%}{%endraw%}` .
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{% raw %}
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```liquid
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{% if product.title contains 'Pack' %}
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This product's title contains the word Pack.
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{% endif %}
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```
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{% endraw %}
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## Learn More
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For more knowledge about Jekyll posts, visit the [Jekyll Docs: Posts](https://jekyllrb.com/docs/posts/).
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