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nixos/smokeping: Make default imgUrl relative.
This avoids a common problem: Until now, port forwarding to multiple hosts running smokeping did not work; they all show the data of the first smokeping instance. That ws because the image URLs generated by smokeping are absolute (`imgurl` setting). Consequently, if you ran ssh node-1 -L 8081:localhost:8081 ssh node-2 -L 8081:localhost:8082 ssh node-3 -L 8081:localhost:8083 and try to open http://localhost:8081, http://localhost:8082 and http://localhost:8083, they all would show the images of node-1! Using a relative `imgurl` fixes that. As per smokeping docs on `imgurl`: > Either an absolute URL to the `imgcache` directory or one relative to the > directory where you keep the SmokePing cgi.
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@ -131,10 +131,15 @@ in
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};
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imgUrl = mkOption {
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type = types.str;
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default = "http://${cfg.hostName}:${toString cfg.port}/cache";
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defaultText = literalExpression ''"http://''${hostName}:''${toString port}/cache"'';
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default = "cache";
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defaultText = literalExpression ''"cache"'';
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example = "https://somewhere.example.com/cache";
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description = "Base url for images generated in the cgi.";
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description = ''
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Base url for images generated in the cgi.
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The default is a relative URL to ensure it works also when e.g. forwarding
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the GUI port via SSH.
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'';
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};
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linkStyle = mkOption {
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type = types.enum ["original" "absolute" "relative"];
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