Add support for exclude markers.

src/CoverageTools.jl

@@ -201,6 +201,26 @@ module CoverageTools
                 end
             end
         end
+
+        # check for excluded lines
+        let io = IOBuffer(content)
+            excluded = false
+            for (l, line) in enumerate(eachline(io))
+                # check for start/stop markers
+                if occursin("COV_EXCL_START", line)
+                    excluded = true
+                elseif occursin("COV_EXCL_STOP", line)
+                    excluded = false
+                end
+
+                # also check for line markers
+                if excluded || occursin("COV_EXCL_LINE", line)
+                    @debug "removing line $l: $line"
+                    coverage[l] = nothing
+                end
+            end
+        end
+
         nothing
     end
 

test/exclusions.jl

@@ -0,0 +1,9 @@
+function main()
+    println(devnull, 1)
+    println(devnull, 2) # COV_EXCL_LINE
+    println(devnull, 3)
+    # COV_EXCL_START
+    println(devnull, 4)
+    # COV_EXCL_STOP
+    println(devnull, 5)
+end

test/runtests.jl

@@ -151,6 +151,19 @@ end
         @test isfile(joinpath(datadir_temp, "CoverageTools.jl"))
         # tear down test data
         rm(datadir_temp; recursive=true)
+
+        # test exclusion markers
+        srcname = joinpath("test", "exclusions.jl")
+        covname = srcname*".cov"
+        clean_file(srcname)
+        cmdstr = "include($(repr(srcname))); main()"
+        run(`$(Base.julia_cmd()) --startup-file=no --code-coverage=user -e $cmdstr`)
+        r = withenv("DISABLE_AMEND_COVERAGE_FROM_SRC" => "yes") do
+            process_file(srcname, "test")
+        end
+        @test r.coverage == [nothing, 2, 1, 1, nothing, 1, nothing, 1, nothing, nothing]
+        amend_coverage_from_src!(r.coverage, r.filename)
+        @test r.coverage == [nothing, 2, nothing, 1, nothing, nothing, nothing, 1, nothing, nothing]
     end
 end