first commit

.gitignore

@@ -1 +1,2 @@
 /Manifest.toml
+.CondaPkg

Project.toml

@@ -3,6 +3,9 @@ uuid = "f157c2ba-572d-4438-a710-d9db9a9b13c0"
 authors = ["Josh Day <[email protected]> and contributors"]
 version = "1.0.0-DEV"
 
+[deps]
+JSON3 = "0f8b85d8-7281-11e9-16c2-39a750bddbf1"
+
 [compat]
 julia = "1.6.7"
 

src/QGIS.jl

@@ -1,5 +1,42 @@
 module QGIS
 
-# Write your package code here.
+using JSON3
 
+#-----------------------------------------------------------------------------# __init__
+qgis_process::String = ""  # Path to qgis_process
+algorithms::Vector{String} = []  # Provider => Algorithm
+
+function __init__()
+    for path in [
+            "/Applications/QGIS.app/Contents/MacOS/bin/qgis_process"
+        ]
+        if isfile(path)
+            set_qgis_process_path(path)
+            break
+        end
+    end
+    isnothing(qgis_process) && @warn("qgis_process not found.  You must explicitly set `QGIS.set_qgis_process_path(\"path/to/qgis_process\")`.")
+end
+
+function set_qgis_process_path(path::String)
+    isfile(path) || error("Not found: $path")
+    global qgis_process = path
+    foreach(values(process("list").providers)) do provider
+        append!(algorithms, string.(keys(provider.algorithms)))
+    end
+end
+
+function process(x...)
+    io = IOBuffer()
+    cmd = pipeline(`$qgis_process --json $x`; stdout=io, stderr=devnull)
+    Base.run(cmd)
+    JSON3.read(String(take!(io)))
 end
+
+#-----------------------------------------------------------------------------# run
+run(algorithm_id::String, args...) = process("run", algorithm_id, args...)
+Base.propertynames(::typeof(run)) = Symbol.(algorithms)
+Base.getproperty(::typeof(run), alg_id::Symbol) = (x...) -> run(alg_id, x...)
+
+
+end  # module QGIS