nix-configs

commit e50c5955e4f0657930f2b78d9b05e4e7a10bb004
parent c6245f319188fe2dc5351b9ac499d80ea97fff53
Author: breadcat <breadcat@users.noreply.github.com>
Date:   Mon, 28 Jul 2025 10:46:20 +0100

Add blog weight script

Diffstat:
A
scripts/blog-weight.nix
 | 
54
++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 54 insertions(+), 0 deletions(-)
diff --git a/scripts/blog-weight.nix b/scripts/blog-weight.nix
@@ -0,0 +1,54 @@
+{
+  pkgs,
+  domain,
+  ...
+}: let
+  blog-weight = pkgs.writeShellScriptBin "blog-weight" ''
+    # variables
+	weight_filename="$HOME/vault/src/blog.${domain}/content/weight.md"
+	if [ "$1" = "date" ]; then
+		printf "Writing empty dates... "
+		page_source="$(head -n -1 "$weight_filename")"
+		previous_date="$(printf %s "$page_source" | awk -F, 'END{print $1}')"
+		sequence_count="$((($(date --date="$(date +%F)" +%s) - $(date --date="$previous_date" +%s)) / (60 * 60 * 24)))"
+		{
+			printf "%s\\n" "$page_source"
+			printf "%s" "$(for i in $(seq $sequence_count); do printf "%s,\\n" "$(date -d "$previous_date+$i day" +%F)"; done)"
+			printf "\\n</pre></details>"
+		} >"$weight_filename"
+		printf "done\\n"
+		exit 0
+	fi
+	printf "Drawing graph... "
+	weight_rawdata="$(awk '/<pre>/{flag=1; next} /<\/pre>/{flag=0} flag' "$weight_filename" | sort -u)"
+	weight_dateinit="$(awk '/date:/ {print $2}' "$weight_filename")"
+	grep "^$(date +%Y)-" <<<"$weight_rawdata" >temp.dat
+	${pkgs.gnuplot}/bin/gnuplot <<-EOF
+		set grid
+		set datafile separator comma
+		set xlabel "Month"
+		set xdata time
+		set timefmt "%Y-%m-%d"
+		set xtics format "%b"
+		set ylabel "Weight (kg)"
+		set key off
+		set term svg font 'sans-serif,12'
+		set sample 50
+		set output "temp.svg"
+		plot "temp.dat" using 1:2 smooth cspline with lines
+	EOF
+	printf "done\\nWriting page... "
+	{
+		printf -- "---\\ntitle: Weight\\nlayout: single\\ndate: %s\\nlastmod: %(%Y-%m-%dT%H:%M:00)T\\n---\\n\\n" "$weight_dateinit" -1
+		printf "%s\\n\\n" "$(${pkgs.scour}/bin/scour -i temp.svg --strip-xml-prolog --remove-descriptive-elements --create-groups --enable-id-stripping --enable-comment-stripping --shorten-ids --no-line-breaks)"
+		printf "<details><summary>Raw data</summary>\\n<pre>\\n%s\\n</pre></details>" "$weight_rawdata"
+
+	} >"$weight_filename"
+	printf "done\\nCleaning up... "
+	rm temp.{dat,svg}
+	printf "done\\n"
+
+  '';
+in {
+  environment.systemPackages = [blog-weight];
+}