Add directories input (#8)

Co-authored-by: Sascha Mann <git@mail.saschamann.eu>
Co-authored-by: Michael Schlottke-Lakemper <michael@sloede.com>

README.md

@@ -13,3 +13,24 @@ See [PkgTemplates.jl](https://github.com/invenia/PkgTemplates.jl/blob/master/tes
         with:
           file: lcov.info
 ```
+
+One can also specify the directory or directories to use via the `directories` input (which defaults to `src`). E.g.
+```yaml
+
+      - uses: julia-actions/julia-processcoverage@v1
+        with:
+          directories: src,examples
+      - uses: codecov/codecov-action@v1
+        with:
+          file: lcov.info
+```
+instructs the action to look for coverage information in both `src` 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
+        with:
+          file: lcov.info
+```
+to get coverage information from a package in a subdirectory of the repo.

action.yml

@@ -6,8 +6,16 @@ branding:
   icon: 'settings'
   color: 'gray-dark'
 
+inputs:
+  directories:
+    description: 'Comma-separated list of directories to look for coverage information (e.g. `src,examples`)'
+    required: false
+    default: 'src'
+
 runs:
   using: 'composite'
   steps:
     - run: julia --color=yes "$GITHUB_ACTION_PATH"/main.jl
       shell: bash
+      env:
+        INPUT_DIRECTORIES: ${{ inputs.directories }}

main.jl

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