imagemagick: add rsvg support

[hjmallon]

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I would like to add rsvg to imagemagic as without is svg->png conversions don't work. It was pretty popular (similar to HEIF I think which was accepted).

https://formulae.brew.sh/formula/imagemagick

[fxcoudert]

Hum… librsvg has huge dependency tree:

$ brew deps --tree librsvg
librsvg
├── cairo
│   ├── fontconfig
│   │   └── freetype
│   │       └── libpng
│   ├── freetype
│   │   └── libpng
│   ├── glib
│   │   ├── gettext
│   │   ├── libffi
│   │   └── pcre
│   ├── libpng
│   └── pixman
├── gdk-pixbuf
│   ├── glib
│   │   ├── gettext
│   │   ├── libffi
│   │   └── pcre
│   ├── jpeg
│   ├── libpng
│   └── libtiff
│       └── jpeg
├── glib
│   ├── gettext
│   ├── libffi
│   └── pcre
├── libcroco
│   └── glib
│       ├── gettext
│       ├── libffi
│       └── pcre
└── pango
    ├── cairo
    │   ├── fontconfig
    │   │   └── freetype
    │   │       └── libpng
    │   ├── freetype
    │   │   └── libpng
    │   ├── glib
    │   │   ├── gettext
    │   │   ├── libffi
    │   │   └── pcre
    │   ├── libpng
    │   └── pixman
    ├── fontconfig
    │   └── freetype
    │       └── libpng
    ├── fribidi
    ├── glib
    │   ├── gettext
    │   ├── libffi
    │   └── pcre
    └── harfbuzz
        ├── cairo
        │   ├── fontconfig
        │   │   └── freetype
        │   │       └── libpng
        │   ├── freetype
        │   │   └── libpng
        │   ├── glib
        │   │   ├── gettext
        │   │   ├── libffi
        │   │   └── pcre
        │   ├── libpng
        │   └── pixman
        ├── freetype
        │   └── libpng
        ├── glib
        │   ├── gettext
        │   ├── libffi
        │   └── pcre
        ├── graphite2
        └── icu4c

[hjmallon]

True, I leave it up to you. I can always keep my git in a branch locally for this use.

I think new deps would be something like

cairo
fontconfig
fribidi
gdk-pixbuf
gettext
glib
graphite2
harfbuzz
icu4c
libcroco
libffi
pango
pcre
pixman

[javian]

I would tend to agree that the dependency list is too big to include . I can see the need for it but there are also other tools that does the same with less of a footprint.

[fxcoudert]

Thanks @hjmallon for suggesting this, we are going to decline.