VS Code无法安装Go工具

I try to start using Go in VSCode. I've installed Go as well as Git and created a project in Code, containing a single .go file.

When I type something, VSCode warns me that tools like golint are missing and prompts me to install them. I click on "Install all".

Then the console shows this :

Installing 10 tools
  gocode
  gopkgs
  go-outline
  go-symbols
  guru
  gorename
  godef
  goreturns
  golint
  gotests

Installing gocode SUCCEEDED
Installing gopkgs SUCCEEDED
Installing go-outline SUCCEEDED
Installing go-symbols FAILED
Installing guru FAILED
Installing gorename FAILED
Installing godef SUCCEEDED
Installing goreturns FAILED
Installing golint FAILED
Installing gotests FAILED

6 tools failed to install.

go-symbols:
Error: Command failed: C:\Go\bin\go.exe get -u -v github.com/newhook/go-symbols
github.com/newhook/go-symbols (download)
Fetching https://golang.org/x/tools/go/buildutil?go-get=1
Parsing meta tags from https://golang.org/x/tools/go/buildutil?go-get=1 (status code 200)
get "golang.org/x/tools/go/buildutil": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/go/buildutil?go-get=1
get "golang.org/x/tools/go/buildutil": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/go/buildutil: exit status 128
github.com/newhook/go-symbols (download)
Fetching https://golang.org/x/tools/go/buildutil?go-get=1
Parsing meta tags from https://golang.org/x/tools/go/buildutil?go-get=1 (status code 200)
get "golang.org/x/tools/go/buildutil": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/go/buildutil?go-get=1
get "golang.org/x/tools/go/buildutil": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/go/buildutil: exit status 128

guru:
Error: Command failed: C:\Go\bin\go.exe get -u -v golang.org/x/tools/cmd/guru
Fetching https://golang.org/x/tools/cmd/guru?go-get=1
Parsing meta tags from https://golang.org/x/tools/cmd/guru?go-get=1 (status code 200)
get "golang.org/x/tools/cmd/guru": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/cmd/guru?go-get=1
get "golang.org/x/tools/cmd/guru": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/cmd/guru: exit status 128
Fetching https://golang.org/x/tools/cmd/guru?go-get=1
Parsing meta tags from https://golang.org/x/tools/cmd/guru?go-get=1 (status code 200)
get "golang.org/x/tools/cmd/guru": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/cmd/guru?go-get=1
get "golang.org/x/tools/cmd/guru": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/cmd/guru: exit status 128

gorename:
Error: Command failed: C:\Go\bin\go.exe get -u -v golang.org/x/tools/cmd/gorename
Fetching https://golang.org/x/tools/cmd/gorename?go-get=1
Parsing meta tags from https://golang.org/x/tools/cmd/gorename?go-get=1 (status code 200)
get "golang.org/x/tools/cmd/gorename": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/cmd/gorename?go-get=1
get "golang.org/x/tools/cmd/gorename": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/cmd/gorename: exit status 128
Fetching https://golang.org/x/tools/cmd/gorename?go-get=1
Parsing meta tags from https://golang.org/x/tools/cmd/gorename?go-get=1 (status code 200)
get "golang.org/x/tools/cmd/gorename": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/cmd/gorename?go-get=1
get "golang.org/x/tools/cmd/gorename": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/cmd/gorename: exit status 128

goreturns:
Error: Command failed: C:\Go\bin\go.exe get -u -v sourcegraph.com/sqs/goreturns
Fetching https://sourcegraph.com/sqs/goreturns?go-get=1
Parsing meta tags from https://sourcegraph.com/sqs/goreturns?go-get=1 (status code 200)
get "sourcegraph.com/sqs/goreturns": found meta tag main.metaImport{Prefix:"sourcegraph.com/sqs/goreturns", VCS:"git", RepoRoot:"https://github.com/sqs/goreturns"} at https://sourcegraph.com/sqs/goreturns?go-get=1
sourcegraph.com/sqs/goreturns (download)
github.com/sqs/goreturns (download)
Fetching https://golang.org/x/tools/imports?go-get=1
Parsing meta tags from https://golang.org/x/tools/imports?go-get=1 (status code 200)
get "golang.org/x/tools/imports": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/imports?go-get=1
get "golang.org/x/tools/imports": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/imports: exit status 128
Fetching https://sourcegraph.com/sqs/goreturns?go-get=1
Parsing meta tags from https://sourcegraph.com/sqs/goreturns?go-get=1 (status code 200)
get "sourcegraph.com/sqs/goreturns": found meta tag main.metaImport{Prefix:"sourcegraph.com/sqs/goreturns", VCS:"git", RepoRoot:"https://github.com/sqs/goreturns"} at https://sourcegraph.com/sqs/goreturns?go-get=1
sourcegraph.com/sqs/goreturns (download)
github.com/sqs/goreturns (download)
Fetching https://golang.org/x/tools/imports?go-get=1
Parsing meta tags from https://golang.org/x/tools/imports?go-get=1 (status code 200)
get "golang.org/x/tools/imports": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/imports?go-get=1
get "golang.org/x/tools/imports": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/imports: exit status 128

golint:
Error: Command failed: C:\Go\bin\go.exe get -u -v github.com/golang/lint/golint
github.com/golang/lint (download)
Fetching https://golang.org/x/tools/go/gcexportdata?go-get=1
Parsing meta tags from https://golang.org/x/tools/go/gcexportdata?go-get=1 (status code 200)
get "golang.org/x/tools/go/gcexportdata": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/go/gcexportdata?go-get=1
get "golang.org/x/tools/go/gcexportdata": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/go/gcexportdata: exit status 128
github.com/golang/lint (download)
Fetching https://golang.org/x/tools/go/gcexportdata?go-get=1
Parsing meta tags from https://golang.org/x/tools/go/gcexportdata?go-get=1 (status code 200)
get "golang.org/x/tools/go/gcexportdata": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/go/gcexportdata?go-get=1
get "golang.org/x/tools/go/gcexportdata": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/go/gcexportdata: exit status 128

gotests:
Error: Command failed: C:\Go\bin\go.exe get -u -v github.com/cweill/gotests/...
github.com/cweill/gotests (download)
Fetching https://golang.org/x/tools/imports?go-get=1
Parsing meta tags from https://golang.org/x/tools/imports?go-get=1 (status code 200)
get "golang.org/x/tools/imports": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/imports?go-get=1
get "golang.org/x/tools/imports": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/imports: exit status 128
github.com/cweill/gotests (download)
Fetching https://golang.org/x/tools/imports?go-get=1
Parsing meta tags from https://golang.org/x/tools/imports?go-get=1 (status code 200)
get "golang.org/x/tools/imports": found meta tag main.metaImport{Prefix:"golang.org/x/tools", VCS:"git", RepoRoot:"https://go.googlesource.com/tools"} at https://golang.org/x/tools/imports?go-get=1
get "golang.org/x/tools/imports": verifying non-authoritative meta tag
Fetching https://golang.org/x/tools?go-get=1
Parsing meta tags from https://golang.org/x/tools?go-get=1 (status code 200)
golang.org/x/tools (download)
# cd C:\Users\user\go\src\golang.org\x\tools; git pull --ff-only
fatal: Not a git repository (or any of the parent directories): .git
package golang.org/x/tools/imports: exit status 128

Some tools are able to install, others are not. I can't do anything about the Not a git repository error because it's an automated process and I'm not the one typing the git commands.

I tried installing the tools separately in PowerShell and I get the same errors. My go directory is created (in %USERPROFILE%\go) and the GOPATH is set correctly.

Any ideas ?