Fix when input directories are not found (#20)

* Fix when input directories are not found

* Update main.jl

Co-authored-by: Ian Butterworth <i.r.butterworth@gmail.com>

Co-authored-by: Ian Butterworth <i.r.butterworth@gmail.com>

README.md

@@ -4,33 +4,33 @@
 
 ## Usage
 
-See [PkgTemplates.jl](https://github.com/invenia/PkgTemplates.jl/blob/master/test/fixtures/AllPlugins/.github/workflows/ci.yml) for a complete example.
+See [PkgTemplates.jl](https://github.com/invenia/PkgTemplates.jl/blob/master/test/fixtures/AllPlugins/.github/workflows/CI.yml) for a complete example.
 
 ```yaml
 
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v2
         with:
-          file: lcov.info
+          files: lcov.info
 ```
 
-One can also specify the directory or directories to use via the `directories` input (which defaults to `src`). E.g.
+One can also specify the directory or directories (comma separated) to use via the `directories` input (which defaults to `src,ext`). E.g.
 ```yaml
 
       - uses: julia-actions/julia-processcoverage@v1
         with:
-          directories: src,examples
-      - uses: codecov/codecov-action@v1
+          directories: src,ext,examples
+      - uses: codecov/codecov-action@v2
         with:
-          file: lcov.info
+          files: lcov.info
 ```
-instructs the action to look for coverage information in both `src` and an `examples` folder. Likewise, use
+instructs the action to look for coverage information in `src`, `ext`, and an `examples` folder. Likewise, use
 ```yaml
       - uses: julia-actions/julia-processcoverage@v1
         with:
           directories: path/to/subdir/package/src
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v2
         with:
-          file: lcov.info
+          files: lcov.info
 ```
 to get coverage information from a package in a subdirectory of the repo.

action.yml

@@ -10,7 +10,7 @@ inputs:
   directories:
     description: 'Comma-separated list of directories to look for coverage information (e.g. `src,examples`)'
     required: false
-    default: 'src'
+    default: 'src,ext'
 
 runs:
   using: 'composite'

main.jl

@@ -6,11 +6,15 @@ Pkg.add(PackageSpec(name="CoverageTools"))
 
 using CoverageTools
 
-directories = get(ENV, "INPUT_DIRECTORIES", "src")
+directories = get(ENV, "INPUT_DIRECTORIES", "src,ext")
 dirs = filter!(!isempty, split(directories, ","))
 for dir in dirs
-    isdir(dir) || error("directory \"$dir\" not found!")
+    if dir == "ext"
+        continue  # Silently skip this directory
+    elseif !isdir(dir)
+        error("directory \"$dir\" not found!")
+    end
 end
-
+filter!(isdir, dirs)
 pfs = mapreduce(process_folder, vcat, dirs)
 LCOV.writefile("lcov.info", pfs)