This repository has no description
pkgs.realwallpaper: inline nomads-cloud and grib2json
author
lassulus
date
(Oct 7, 2026, 9:06 AM CEST)
commit
c674c134
c674c134287b1cb9a40c9ccd8d0cc5f2c2fb550c
parent
b845983a
b845983a98f08b02b6345d126b0a00e14cfe6627
+82
-81
-24
pkgs/grib2json/package.nix
-24
pkgs/grib2json/package.nix
···
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-
# Copied from stockholm krebs/5pkgs/simple/grib2json (cc283503).
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{
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stdenv,
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fetchzip,
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jre,
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}:
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-
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stdenv.mkDerivation {
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name = "grib2json";
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src = fetchzip {
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url = "https://github.com/krebs/grib2json-bin/archive/31efe677b40fe491c988d50f96b59b1b7e2d46f7.zip";
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sha256 = "1h3yxg270bvac7kaqsbsv4f8nln1i03rfz4cm8cp7llhjj3s6a6b";
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};
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installPhase = ''
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mkdir -p $out/bin
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cp -r lib $out/
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cat > $out/bin/grib2json << EOF
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#!/bin/sh
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set -x
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${jre}/bin/java -jar $out/lib/grib2json-0.8.0-SNAPSHOT.jar "\$@"
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EOF
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chmod +x $out/bin/grib2json
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'';
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}
-56
pkgs/nomads-cloud/package.nix
-56
pkgs/nomads-cloud/package.nix
···
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# Copied from stockholm krebs/5pkgs/simple/nomads-cloud (cc283503).
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{
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callPackage,
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writers,
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coreutils,
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curl,
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jq,
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findutils,
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imagemagick,
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}:
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let
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grib2json = callPackage ../grib2json/package.nix { };
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in
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writers.writeDashBin "nomads-cloud" ''
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prefix=$(mktemp -d)
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grib_path=$prefix/clouds.grib
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json_path=$prefix/clouds.json
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pgm_path=$prefix/clouds.pgm
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png_path=$1
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mkdir -p "$prefix"
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-
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date=$(${coreutils}/bin/date +%Y%m%d)
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for hour in 18 12 06 00; do
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url="https://nomads.ncep.noaa.gov/cgi-bin/filter_gfs_0p25_1hr.pl?file=gfs.t''${hour}z.pgrb2.0p25.anl&lev_entire_atmosphere_%5C%28considered_as_a_single_layer%5C%29=on&var_CWAT=on&leftlon=-180&rightlon=180&toplat=90&bottomlat=-90&dir=%2Fgfs.''${date}%2F''${hour}%2Fatmos"
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echo "$url"
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${curl}/bin/curl -fsS "$url" > "$grib_path"
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if [ "$?" -eq 0 ]; then
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break
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fi
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done
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${grib2json}/bin/grib2json --data "$grib_path" > "$json_path"
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width=$(${jq}/bin/jq '.[0].header.nx' < "$json_path")
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height=$(${jq}/bin/jq '.[0].header.ny' < "$json_path")
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# The maximum gray value. Must be bigger than 0 and less than 65536.
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maxval=1000
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# pgm - Netpbm grayscale image format
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# http://netpbm.sourceforge.net/doc/pgm.html
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{
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echo P2
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echo "$width $height"
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echo "$maxval"
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cat "$json_path" |
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${jq}/bin/jq --argjson maxval "$maxval" -c '
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((.[0].data[]) * $maxval | round)
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' |
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${findutils}/bin/xargs -n "$width"
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} > "$pgm_path"
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${imagemagick}/bin/convert -roll +50% "$pgm_path" "$png_path"
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rm -r "$prefix"
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''
+24
pkgs/realwallpaper/grib2json.nix
+24
pkgs/realwallpaper/grib2json.nix
···
1
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# Copied from stockholm krebs/5pkgs/simple/grib2json (cc283503).
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{
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stdenv,
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fetchzip,
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+
jre,
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}:
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+
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stdenv.mkDerivation {
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name = "grib2json";
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src = fetchzip {
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url = "https://github.com/krebs/grib2json-bin/archive/31efe677b40fe491c988d50f96b59b1b7e2d46f7.zip";
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sha256 = "1h3yxg270bvac7kaqsbsv4f8nln1i03rfz4cm8cp7llhjj3s6a6b";
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};
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installPhase = ''
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mkdir -p $out/bin
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cp -r lib $out/
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cat > $out/bin/grib2json << EOF
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#!/bin/sh
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set -x
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${jre}/bin/java -jar $out/lib/grib2json-0.8.0-SNAPSHOT.jar "\$@"
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EOF
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chmod +x $out/bin/grib2json
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'';
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}
+56
pkgs/realwallpaper/nomads-cloud.nix
+56
pkgs/realwallpaper/nomads-cloud.nix
···
1
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# Copied from stockholm krebs/5pkgs/simple/nomads-cloud (cc283503).
2
+
{
3
+
callPackage,
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+
writers,
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+
coreutils,
6
+
curl,
7
+
jq,
8
+
findutils,
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+
imagemagick,
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}:
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let
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grib2json = callPackage ./grib2json.nix { };
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in
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writers.writeDashBin "nomads-cloud" ''
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prefix=$(mktemp -d)
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grib_path=$prefix/clouds.grib
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json_path=$prefix/clouds.json
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pgm_path=$prefix/clouds.pgm
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png_path=$1
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+
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mkdir -p "$prefix"
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+
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date=$(${coreutils}/bin/date +%Y%m%d)
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for hour in 18 12 06 00; do
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url="https://nomads.ncep.noaa.gov/cgi-bin/filter_gfs_0p25_1hr.pl?file=gfs.t''${hour}z.pgrb2.0p25.anl&lev_entire_atmosphere_%5C%28considered_as_a_single_layer%5C%29=on&var_CWAT=on&leftlon=-180&rightlon=180&toplat=90&bottomlat=-90&dir=%2Fgfs.''${date}%2F''${hour}%2Fatmos"
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echo "$url"
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${curl}/bin/curl -fsS "$url" > "$grib_path"
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if [ "$?" -eq 0 ]; then
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break
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fi
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done
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${grib2json}/bin/grib2json --data "$grib_path" > "$json_path"
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+
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width=$(${jq}/bin/jq '.[0].header.nx' < "$json_path")
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height=$(${jq}/bin/jq '.[0].header.ny' < "$json_path")
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+
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# The maximum gray value. Must be bigger than 0 and less than 65536.
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maxval=1000
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+
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# pgm - Netpbm grayscale image format
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# http://netpbm.sourceforge.net/doc/pgm.html
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{
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echo P2
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echo "$width $height"
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echo "$maxval"
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cat "$json_path" |
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${jq}/bin/jq --argjson maxval "$maxval" -c '
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((.[0].data[]) * $maxval | round)
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' |
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${findutils}/bin/xargs -n "$width"
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} > "$pgm_path"
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+
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${imagemagick}/bin/convert -roll +50% "$pgm_path" "$png_path"
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+
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rm -r "$prefix"
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''
+2
-1
pkgs/realwallpaper/package.nix
+2
-1
pkgs/realwallpaper/package.nix
···
1
1
# Copied from stockholm krebs/5pkgs/simple/realwallpaper (cc283503).
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# nomads-cloud and grib2json are its stockholm dependencies, used only here.
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{ pkgs, callPackage }:
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let
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nomads-cloud = callPackage ../nomads-cloud/package.nix { };
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nomads-cloud = callPackage ./nomads-cloud.nix { };
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in
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pkgs.writers.writeDashBin "generate-wallpaper" ''
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set -euf