Downloader helper user agent (#227)

* add global variables and Info struct in order to inject build time values via ldflags

* replace cli.AppName with global variable global.GetAppName() getter

* replaced cli.Version var with global getter

* add .idea to .gitignore

* re organize imports

* add license to global.go

* add hardcoded fallback version string

* organize imports step2

* organize imports step3

* replace cli.AppName with global variable global.GetAppName() getter

* add User-Agent header to downloader helper configuration

* add testing for user agent-string generation

* re organize imports

* refactor global package into version package and rename and replace having cli login,logout,validate removed

* refactor versioning variables in version package and implement Info struct wihth String method

* refactor Info cosntructor to use directly package vars and renamed package from global to version

* replace package name from global to version

* solve package name clash for version and cli/version

* replace application name getter with VersionInfo.Application field
having removed cli login,logout,validate

* search and replace version string getter with VersionInfo.VersionString field

* implement empty http.Header struct propagation from cli to resources

* align downloader helper to use propagated http.Header from upper layers and modify test accordingly

* align daemon to use empty http.Header as struct field in ArduinoCoreServerImpl

* clean inside cobra commands for empty http.Header struct and inject headers build from VersionInfo struct in cli InitInstance func

* remove unused runDaemonCommand in daemon

* add user agent specific for daemon mode via DownloaderHeaders property for ArduinoCoreServerImpl

* add testing information in README.md

* removed getters and related usage for version package

* update dependencies

* finalize helpers_test User-Agent header value

* add integration test for version info injection via vars

* tidy go mod and reorganize imports and tidy long lines

* inject ldflags variables in build task in Taskfile.yml

* replace commands in /travis.yml with tasks properly merging flags

* fix install command for go-task to solve "undefined: interp.EnvFromList" error

* add coverage files to .gitignore

* tidy dependencies in go.mod

* update task executable path in tasks due to install path generated by go-task install script

* implement exported variable cli.HTTPClientHeader in order to have it available in all cli subpackages and not onli in cli

* fix comment replacing "version config" with "global config"

* leverage cli.VersionInfo to present a better terminal and json data for version info

Author: rsora

.gitignore

@@ -5,3 +5,5 @@
 /cmd/formatter/debug.test
 /arduino-cli.yaml
 /wiki
+.idea
+coverage_*.txt

.travis.yml

@@ -11,6 +11,7 @@ env:
 # Make sure golangci-lint is vendored.
 before_install:
   - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | bash -s -- -b $GOPATH/bin v1.16.0
+  - curl -sL https://taskfile.dev/install.sh | sh
 
 install: true
 
@@ -20,9 +21,10 @@ script:
   # Run linter
   - golangci-lint run
   # Build and test
-  - go build
-  - go test -timeout 20m -v -coverpkg=./... -coverprofile=coverage.txt -covermode=atomic ./...
+  - ./bin/task build
+  - ./bin/task test
 
 after_success:
-  - bash <(curl -s https://codecov.io/bash)
+  - bash <(curl -s https://codecov.io/bash) -cF unittests,integration
+