forked from
tangled.org/core
Monorepo for Tangled
nix,dolly: subset input files to dolly derivation
this greatly improves build speed of derivations that depend on the
dolly derivation, because it no longer rebuilds everytime there is a
change to appview.
Signed-off-by: oppiliappan <me@oppi.li>
author
oppiliappan
committer
![]()
tangled.org
date
(Jan 19, 2026, 7:28 AM UTC)
commit
0c233644
0c23364495fcf31716c2d3284ce0ac4c70f089f1
parent
d65eed2e
d65eed2ec3080d474ca771a4350b9503fa23bcf6
change-id
xxvvqknz
xxvvqknzlxzkmsrrpvzxopxvktrxwvsx
+48
-28
+23
-10
cmd/dolly/main.go
+23
-10
cmd/dolly/main.go
···
2
2
3
3
import (
4
4
"bytes"
5
+
_ "embed"
5
6
"flag"
6
7
"fmt"
7
8
"image"
···
16
17
"github.com/srwiley/oksvg"
17
18
"github.com/srwiley/rasterx"
18
19
"golang.org/x/image/draw"
19
-
"tangled.org/core/appview/pages"
20
20
"tangled.org/core/ico"
21
21
)
22
22
23
23
func main() {
24
24
var (
25
-
size string
26
-
fillColor string
27
-
output string
25
+
size string
26
+
fillColor string
27
+
output string
28
+
templatePath string
28
29
)
29
30
31
+
flag.StringVar(&templatePath, "template", "", "Path to dolly go-html template")
30
32
flag.StringVar(&size, "size", "512x512", "Output size in format WIDTHxHEIGHT (e.g., 512x512)")
31
33
flag.StringVar(&fillColor, "color", "#000000", "Fill color in hex format (e.g., #FF5733)")
32
34
flag.StringVar(&output, "output", "dolly.svg", "Output file path (format detected from extension: .svg, .png, or .ico)")
33
35
flag.Parse()
36
+
37
+
if templatePath == "" {
38
+
fmt.Fprintf(os.Stderr, "Empty template path")
39
+
os.Exit(1)
40
+
}
34
41
35
42
width, height, err := parseSize(size)
36
43
if err != nil {
···
52
59
os.Exit(1)
53
60
}
54
61
55
-
svgData, err := dolly(fillColor)
62
+
tpl, err := os.ReadFile(templatePath)
63
+
if err != nil {
64
+
fmt.Fprintf(os.Stderr, "Failed to read template from path %s: %v\n", templatePath, err)
65
+
os.Exit(1)
66
+
}
67
+
68
+
svgData, err := dolly(string(tpl), fillColor)
56
69
if err != nil {
57
70
fmt.Fprintf(os.Stderr, "Error generating SVG: %v\n", err)
58
71
os.Exit(1)
···
84
97
fmt.Printf("Successfully generated %s (%dx%d)\n", output, width, height)
85
98
}
86
99
87
-
func dolly(hexColor string) ([]byte, error) {
88
-
tpl, err := template.New("dolly").
89
-
ParseFS(pages.Files, "templates/fragments/dolly/logo.html")
100
+
func dolly(tplString, hexColor string) ([]byte, error) {
101
+
tpl, err := template.New("dolly").Parse(tplString)
90
102
if err != nil {
91
103
return nil, err
92
104
}
93
105
94
106
var svgData bytes.Buffer
95
-
if err := tpl.ExecuteTemplate(&svgData, "fragments/dolly/logo", pages.DollyParams{
96
-
FillColor: hexColor,
107
+
if err := tpl.ExecuteTemplate(&svgData, "fragments/dolly/logo", map[string]any{
108
+
"FillColor": hexColor,
109
+
"Classes": "",
97
110
}); err != nil {
98
111
return nil, err
99
112
}
+25
-18
nix/pkgs/dolly.nix
+25
-18
nix/pkgs/dolly.nix
···
1
1
{
2
+
lib,
2
3
buildGoApplication,
3
4
modules,
4
-
src,
5
-
}:
6
-
buildGoApplication {
7
-
pname = "dolly";
8
-
version = "0.1.0";
9
-
inherit src modules;
10
-
11
-
# patch the static dir
12
-
postUnpack = ''
13
-
pushd source
14
-
mkdir -p appview/pages/static
15
-
touch appview/pages/static/x
16
-
popd
17
-
'';
18
-
19
-
doCheck = false;
20
-
subPackages = ["cmd/dolly"];
21
-
}
5
+
writeShellScriptBin,
6
+
}: let
7
+
src = lib.fileset.toSource {
8
+
root = ../..;
9
+
fileset = lib.fileset.unions [
10
+
../../go.mod
11
+
../../ico
12
+
../../cmd/dolly/main.go
13
+
../../appview/pages/templates/fragments/dolly/logo.html
14
+
];
15
+
};
16
+
dolly-unwrapped = buildGoApplication {
17
+
pname = "dolly-unwrapped";
18
+
version = "0.1.0";
19
+
inherit src modules;
20
+
doCheck = false;
21
+
subPackages = ["cmd/dolly"];
22
+
};
23
+
in
24
+
writeShellScriptBin "dolly" ''
25
+
exec ${dolly-unwrapped}/bin/dolly \
26
+
-template ${src}/appview/pages/templates/fragments/dolly/logo.html \
27
+
"$@"
28
+
''