Added provides_includes field in Library gRPC message (#934)

* Refactored commaSeparatedToList function

* Added 'provides_includes' field in 'lib list' output structures

* Added integration tests for 'provides_includes' field

* Report errors while populating library output

Author: cmaglie

Diff for: arduino/libraries/libraries.go

@@ -16,6 +16,8 @@
 package libraries
 
 import (
+	"fmt"
+
 	"github.com/arduino/arduino-cli/arduino/cores"
 	paths "github.com/arduino/go-paths-helper"
 	properties "github.com/arduino/go-properties-orderedmap"
@@ -71,6 +73,7 @@ type Library struct {
 	License                string
 	Properties             *properties.Map
 	Examples               paths.PathList
+	sourceHeaders          []string
 }
 
 func (library *Library) String() string {
@@ -153,3 +156,20 @@ func (library *Library) LocationPriorityFor(platformRelease, refPlatformRelease
 	}
 	return 0
 }
+
+// SourceHeaders returns the C++ headers in the library.
+func (library *Library) SourceHeaders() ([]string, error) {
+	if library.sourceHeaders == nil {
+		cppHeaders, err := library.SourceDir.ReadDir()
+		if err != nil {
+			return nil, fmt.Errorf("reading lib src dir: %s", err)
+		}
+		cppHeaders.FilterSuffix(".h", ".hpp", ".hh")
+		res := []string{}
+		for _, cppHeader := range cppHeaders {
+			res = append(res, cppHeader.Base())
+		}
+		library.sourceHeaders = res
+	}
+	return library.sourceHeaders, nil
+}

Diff for: arduino/libraries/librariesresolver/cpp.go

@@ -52,13 +52,11 @@ func (resolver *Cpp) ScanFromLibrariesManager(lm *librariesmanager.LibrariesMana
 
 // ScanLibrary reads a library to find and cache C++ headers for later retrieval
 func (resolver *Cpp) ScanLibrary(lib *libraries.Library) error {
-	cppHeaders, err := lib.SourceDir.ReadDir()
+	cppHeaders, err := lib.SourceHeaders()
 	if err != nil {
-		return fmt.Errorf("reading lib src dir: %s", err)
+		return fmt.Errorf("reading lib headers: %s", err)
 	}
-	cppHeaders.FilterSuffix(".h", ".hpp", ".hh")
-	for _, cppHeaderPath := range cppHeaders {
-		cppHeader := cppHeaderPath.Base()
+	for _, cppHeader := range cppHeaders {
 		l := resolver.headers[cppHeader]
 		l.Add(lib)
 		resolver.headers[cppHeader] = l

Diff for: arduino/libraries/loader.go

@@ -56,6 +56,14 @@ func makeNewLibrary(libraryDir *paths.Path, location LibraryLocation) (*Library,
 		}
 	}
 
+	commaSeparatedToList := func(in string) []string {
+		res := []string{}
+		for _, e := range strings.Split(in, ",") {
+			res = append(res, strings.TrimSpace(e))
+		}
+		return res
+	}
+
 	library := &Library{}
 	library.Location = location
 	library.InstallDir = libraryDir
@@ -71,10 +79,7 @@ func makeNewLibrary(libraryDir *paths.Path, location LibraryLocation) (*Library,
 	if libProperties.Get("architectures") == "" {
 		libProperties.Set("architectures", "*")
 	}
-	library.Architectures = []string{}
-	for _, arch := range strings.Split(libProperties.Get("architectures"), ",") {
-		library.Architectures = append(library.Architectures, strings.TrimSpace(arch))
-	}
+	library.Architectures = commaSeparatedToList(libProperties.Get("architectures"))
 
 	libProperties.Set("category", strings.TrimSpace(libProperties.Get("category")))
 	if !ValidCategories[libProperties.Get("category")] {
@@ -95,6 +100,10 @@ func makeNewLibrary(libraryDir *paths.Path, location LibraryLocation) (*Library,
 		library.Version = v
 	}
 
+	if includes := libProperties.Get("includes"); includes != "" {
+		library.sourceHeaders = commaSeparatedToList(includes)
+	}
+
 	if err := addExamples(library); err != nil {
 		return nil, errors.Errorf("scanning examples: %s", err)
 	}

Diff for: commands/lib/list.go

@@ -17,7 +17,6 @@ package lib
 
 import (
 	"context"
-	"errors"
 	"fmt"
 	"strings"
 
@@ -27,6 +26,7 @@ import (
 	"github.com/arduino/arduino-cli/arduino/libraries/librariesmanager"
 	"github.com/arduino/arduino-cli/commands"
 	rpc "github.com/arduino/arduino-cli/rpc/commands"
+	"github.com/pkg/errors"
 )
 
 type installedLib struct {
@@ -87,7 +87,10 @@ func LibraryList(ctx context.Context, req *rpc.LibraryListReq) (*rpc.LibraryList
 			if nameFilter != "" && strings.ToLower(lib.Library.Name) != nameFilter {
 				continue
 			}
-			libtmp := GetOutputLibrary(lib.Library)
+			libtmp, err := GetOutputLibrary(lib.Library)
+			if err != nil {
+				return nil, err
+			}
 			release := GetOutputRelease(lib.Available)
 			instaledLib = append(instaledLib, &rpc.InstalledLibrary{
 				Library: libtmp,
@@ -125,7 +128,7 @@ func listLibraries(lm *librariesmanager.LibrariesManager, updatable bool, all bo
 }
 
 // GetOutputLibrary FIXMEDOC
-func GetOutputLibrary(lib *libraries.Library) *rpc.Library {
+func GetOutputLibrary(lib *libraries.Library) (*rpc.Library, error) {
 	insdir := ""
 	if lib.InstallDir != nil {
 		insdir = lib.InstallDir.String()
@@ -143,6 +146,11 @@ func GetOutputLibrary(lib *libraries.Library) *rpc.Library {
 		cntplat = lib.ContainerPlatform.String()
 	}
 
+	libHeaders, err := lib.SourceHeaders()
+	if err != nil {
+		return nil, errors.Errorf("getting library headers: %s", err)
+	}
+
 	return &rpc.Library{
 		Name:              lib.Name,
 		Author:            lib.Author,
@@ -167,7 +175,8 @@ func GetOutputLibrary(lib *libraries.Library) *rpc.Library {
 		Version:           lib.Version.String(),
 		License:           lib.License,
 		Examples:          lib.Examples.AsStrings(),
-	}
+		ProvidesIncludes:  libHeaders,
+	}, nil
 }
 
 // GetOutputRelease FIXMEDOC

Diff for: rpc/commands/lib.pb.go

@@ -268,6 +268,9 @@ message Library {
     LibraryLayout layout = 25;
     // The example sketches provided by the library
     repeated string examples = 26;
+    // Value of the `includes` field in library.properties or, if missing, the list of
+    // include files available on the library source root directory.
+    repeated string provides_includes = 27;
 }
 
 enum LibraryLayout {

Diff for: rpc/commands/lib.proto

@@ -56,6 +56,21 @@ def test_list(run_command):
     assert 1 == len(data)
     # be sure data contains the available version
     assert "" != data[0]["release"]["version"]
+    # be sure data contains the correct provides_includes field
+    assert "ArduinoJson.h" == data[0]["library"]["provides_includes"][0]
+    assert "ArduinoJson.hpp" == data[0]["library"]["provides_includes"][1]
+
+    # Install something we can list without provides_includes field given in library.properties
+    result = run_command("lib install [email protected]")
+    assert result.ok
+    # Look at the JSON output
+    result = run_command("lib list Braccio --format json")
+    assert result.ok
+    assert "" == result.stderr
+    data = json.loads(result.stdout)
+    assert 1 == len(data)
+    # be sure data contains the correct provides_includes field
+    assert "Braccio.h" == data[0]["library"]["provides_includes"][0]
 
 
 def test_install(run_command):