new-post

#!/bin/bash
#
# file:        new-post
# author:      Brian Buccola <brian.buccola@gmail.com>
#
# description: Create a file (for a new Jekyll/Hakyll/etc. post) from an input title.

# Where are your posts?
post_dir="$HOME/repos/website/posts"

# Convert uppercase to lowercase, whitespace to '-', and '/' to '-', and delete
# any character that is not alphanumeric or '-'.
convert_string() {
    echo "$1" \
        | tr [:upper:] [:lower:] \
        | sed 's/\s\+/-/g'       \
        | sed 's,/,-,g'          \
        | tr -dc '[:alnum:]-'
}

# Print message and exit 1.
die() {
    echo "$@"
    exit 1
}

# Check that we're in $post_dir.
[[ "$(pwd)" == "$post_dir" ]] || die "Go to $post_dir."

# Get title and turn it into a post filename.
read -p "title: " title
read -p "tags [as, a, list]: " tags
post="$(date +"%Y-%m-%d")-$(convert_string "$title").md"

# Check that the post doesn't already exist.
[[ -f "$post" ]] && die "The file \"$post\" already exists."

# Create a temp post, for reading YAML frontmatter from.
tmp_post=$(mktemp --tmpdir --suffix .md blog-post-XXXXXXXXXX)

# Escape any occurrence of '"' in $title.
title=$(echo "$title" | sed 's/"/\\"/g')

# Create some basic YAML frontmatter.
cat <<EOT > "$tmp_post"
---
title: "$title"
date: $(date +"%Y-%m-%d %H:%M")
tags: $tags
---

EOT

# Edit the post, reading $tmp_post into it and putting the cursor on the last
# line in insert mode.
vim -c "silent read $tmp_post" + +startinsert "$post"

# Clean up.
rm "$tmp_post"