fix @showprogress @distributed (timholy#295)

* fix macro

* add test in global scope

* don't forget to close while take!(ch)

Author: MarcMush

src/ProgressMeter.jl

@@ -796,47 +796,38 @@ function showprogressdistributed(args...)
     r = loop.args[1].args[2]
     body = loop.args[2]
 
-    setup = quote
-        n = length($(esc(r)))
-        p = Progress(n, $(showprogress_process_args(progressargs)...))
-        ch = RemoteChannel(() -> Channel{Bool}(n))
-    end
-
     if na == 1
         # would be nice to do this with @sync @distributed but @sync is broken
         # https://github.com/JuliaLang/julia/issues/28979
         compute = quote
-            display = @async let i = 0
-                while i < n
-                    take!(ch)
-                    next!(p)
-                    i += 1
-                end
-            end
-            @distributed for $(esc(var)) = $(esc(r))
+            waiting = @distributed for $(esc(var)) = $(esc(r))
                 $(esc(body))
                 put!(ch, true)
             end
+            wait(waiting)
             nothing
         end
     else
         compute = quote
-            display = @async while take!(ch) next!(p) end
-            results = @distributed $(esc(reducer)) for $(esc(var)) = $(esc(r))
+            @distributed $(esc(reducer)) for $(esc(var)) = $(esc(r))
                 x = $(esc(body))
                 put!(ch, true)
                 x
             end
-            put!(ch, false)
-            results
         end
     end
 
     quote
-        $setup
-        results = $compute
-        wait(display)
-        results
+        let n = length($(esc(r)))
+            p = Progress(n, $(showprogress_process_args(progressargs)...))
+            ch = RemoteChannel(() -> Channel{Bool}(n))
+
+            @async while take!(ch) next!(p) end
+            results = $compute
+            put!(ch, false)
+            finish!(p)
+            results
+        end
     end
 end
 

test/test.jl

@@ -372,6 +372,41 @@ end
 println("Testing @showprogress macro on distributed for loop without reducer")
 testfunc16(3000, 0.01, 0.001)
 
+function testfunc16cb(N, dt, tsleep)
+    ProgressMeter.@showprogress dt=dt @distributed for i in N
+        if rand() < 0.7
+            sleep(tsleep)
+        end
+        200 < i < 400 && continue
+        i > 1500 && break
+        i ^ 2
+    end
+end
+
+println("Testing @showprogress macro on distributed for loop with continue")
+testfunc16cb(1:1000, 0.01, 0.002)
+
+println("Testing @showprogress macro on distributed for loop with break")
+testfunc16cb(1000:2000, 0.01, 0.003)
+
+
+println("testing `@showprogress @distributed` in global scope")
+@showprogress @distributed for i in 1:10
+    sleep(0.1)
+    i^2
+end
+
+println("testing `@showprogress @distributed (+)` in global scope")
+# https://github.com/timholy/ProgressMeter.jl/issues/243
+result = @showprogress @distributed (+) for i in 1:10
+    sleep(0.1)
+    i^2
+end
+@test result == sum(abs2, 1:10)
+
+
+
+
 function testfunc17()
     n = 30
     p = ProgressMeter.Progress(n, start=15)