update-instances.sh

#!/bin/sh

# Exit on any error
set -e

echo "Updating PeerTubeScript.js"

# Ensure that required commands are available
command -v curl >/dev/null 2>&1 || { echo "Error: curl is not installed." >&2; exit 1; }
command -v jq >/dev/null 2>&1 || { echo "Error: jq is not installed." >&2; exit 1; }

# Ensure that PeerTubeScript.js ends with exactly one newline
if [ -s PeerTubeScript.js ]; then
    last_char_hex=$(tail -c 1 PeerTubeScript.js | od -An -t x1 | tr -d ' ')
    if [ "$last_char_hex" != "0a" ]; then
        echo >> PeerTubeScript.js
    fi
else
    # If the file is empty, add a newline
    echo >> PeerTubeScript.js
fi

# Define markers
start_marker="// BEGIN AUTOGENERATED INSTANCES"
end_marker="// END AUTOGENERATED INSTANCES"

# Get the current date for autogenerated content
current_date=$(date +%Y-%m-%d)

# Fetch instances and prepare new content
instance_data=$(curl -s "https://instances.joinpeertube.org/api/v1/instances?start=0&count=1000" | jq -r '.data[].host')

# Check if we fetched valid data
if [ -z "$instance_data" ]; then
    echo "Error: No instances fetched. Aborting update." >&2
    exit 1
fi

# Generate new array content with minified formatting
new_array_content=$(echo "$instance_data" | awk -v date="$current_date" -v start_marker="$start_marker" -v end_marker="$end_marker" 'BEGIN {
    print start_marker
    print "// This content is autogenerated during deployment using update-instances.sh and content from https://instances.joinpeertube.org"
    print "// Last updated at: " date
    printf "INDEX_INSTANCES.instances = ["
}
{
    printf "\"" $0 "\","
}
END {
    print "];"
    print end_marker
}')

# Remove existing block safely and append new content
temp_file=$(mktemp)
sed "\#$start_marker#,\#$end_marker#d" PeerTubeScript.js > "$temp_file"
echo "$new_array_content" >> "$temp_file"
mv "$temp_file" PeerTubeScript.js

# Print success message
echo "PeerTubeScript.js updated successfully"