View Source SayCheezEx.Graphs.Provider behaviour (say_cheez_ex v0.3.1)
The interface for a graph provider.
- checks if a such a provider is available, given the providers' own configuration
- renders a graph to some HTML that can be embedded
Link to this section Summary
Functions
Given a recipe s for a graph, first tries a cache and then call a "builder" function to create it.
Runs an external command.
Computes a printable SHA for a string.
Link to this section Callbacks
..
Link to this section Functions
Given a recipe s for a graph, first tries a cache and then call a "builder" function to create it.
So if the SVG was already generated, we load it from disk - if not, we build it again.
builder
Builder
The builder expects a file on disk where the source recipe is. This is useful because local commands read from a file and write to a file.
It returns {:ok, svg_text} or {:error, reason} that will be used to display a result.
Runs an external command.
It returns a binary that captures STDOUT if all went well,
or a tuple {:error, e}
if something went bonkers.
If it's trying to call a command that does not exist on your
local environment, returns {:error, :cmd_not_found}
.
Computes a printable SHA for a string.