improve metadata handling

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,6 @@
 ---
 name: Bug report
-about: For reporting bugs in go-micro
+about: For reporting bugs in micro
 title: "[BUG]"
 labels: ''
 assignees: ''
@@ -16,9 +16,3 @@ assignees: ''
 **How to reproduce the bug:**
 
 If possible, please include a minimal code snippet here.
-
-**Environment:**
-Go Version: please paste `go version` output here
-```
-please paste `go env` output here
-```

.github/ISSUE_TEMPLATE/feature-request---enhancement.md

@@ -1,6 +1,6 @@
 ---
 name: Feature request / Enhancement
-about: If you have a need not served by go-micro
+about: If you have a need not served by micro
 title: "[FEATURE]"
 labels: ''
 assignees: ''
@@ -14,4 +14,4 @@ A clear and concise description of what the problem is. Ex. I'm always frustrate
 A clear and concise description of what you want to happen.
 
 **Additional context**
-Add any other context or screenshots about the feature request here.
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/question.md

@@ -1,14 +1,8 @@
 ---
 name: Question
-about: Ask a question about go-micro
+about: Ask a question about micro
 title: ''
 labels: ''
 assignees: ''
 
----
-
-Before asking, please check if your question has already been answered: 
-
-1. Check the documentation - https://micro.mu/docs/
-2. Check the examples and plugins - https://github.com/micro/examples & https://github.com/micro/go-plugins
-3. Search existing issues
+---

.github/autoapprove.yml

@@ -0,0 +1,28 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        run: [ "curl -o tea https://dl.gitea.com/tea/main/tea-main-linux-amd64",
+               "chmod +x ./tea",
+               "./tea login add --name unistack --token ${{ secrets.GITHUB_TOKEN }} --url https://git.unistack.org",
+               "./tea pr --repo ${{ github.event.repository.name }}"
+        ]
+        if: github.actor == 'vtolstov'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/job_sync.yml

@@ -18,34 +18,76 @@ jobs:
         echo "machine git.unistack.org login vtolstov password ${{ secrets.TOKEN_GITEA }}" >> /root/.netrc
         echo "machine github.com login vtolstov password ${{ secrets.TOKEN_GITHUB }}" >> /root/.netrc
 
+    - name: check master
+      id: check_master
+      run: |
+        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/master | cut -f1)
+        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/master | cut -f1)
+        echo "src_hash=$src_hash"
+        echo "dst_hash=$dst_hash"
+        if [ "$src_hash" != "$dst_hash" ]; then
+          echo "sync_needed=true" >> $GITHUB_OUTPUT
+        else
+          echo "sync_needed=false" >> $GITHUB_OUTPUT
+        fi
+
     - name: sync master
+      if: steps.check_master.outputs.sync_needed == 'true'
       run: |
         git clone --filter=blob:none --filter=tree:0 --branch master --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
         cd repo
         git remote add --no-tags --fetch --track master upstream https://github.com/${GITHUB_REPOSITORY}
-        git merge upstream/master
+        git pull --rebase upstream master
         git push upstream master --progress
         git push origin master --progress
         cd ../
         rm -rf repo
 
+    - name: check v3
+      id: check_v3
+      run: |
+        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/v3 | cut -f1)
+        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/v3 | cut -f1)
+        echo "src_hash=$src_hash"
+        echo "dst_hash=$dst_hash"
+        if [ "$src_hash" != "$dst_hash" ]; then
+          echo "sync_needed=true" >> $GITHUB_OUTPUT
+        else
+          echo "sync_needed=false" >> $GITHUB_OUTPUT
+        fi
+
     - name: sync v3
+      if: steps.check_v3.outputs.sync_needed == 'true'
       run: |
         git clone --filter=blob:none --filter=tree:0 --branch v3 --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
         cd repo
         git remote add --no-tags --fetch --track v3 upstream https://github.com/${GITHUB_REPOSITORY}
-        git merge upstream/v3
+        git pull --rebase upstream v3
         git push upstream v3 --progress
         git push origin v3 --progress
         cd ../
         rm -rf repo
 
+    - name: check v4
+      id: check_v4
+      run: |
+        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/v4 | cut -f1)
+        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/v4 | cut -f1)
+        echo "src_hash=$src_hash"
+        echo "dst_hash=$dst_hash"
+        if [ "$src_hash" != "$dst_hash" ]; then
+          echo "sync_needed=true" >> $GITHUB_OUTPUT
+        else
+          echo "sync_needed=false" >> $GITHUB_OUTPUT
+        fi
+
     - name: sync v4
+      if: steps.check_v4.outputs.sync_needed == 'true'
       run: |
         git clone --filter=blob:none --filter=tree:0 --branch v4 --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
         cd repo
         git remote add --no-tags --fetch --track v4 upstream https://github.com/${GITHUB_REPOSITORY}
-        git merge upstream/v4
+        git pull --rebase upstream v4
         git push upstream v4 --progress
         git push origin v4 --progress
         cd ../

grpc.go

@@ -74,12 +74,12 @@ func (g *grpcClient) secure(addr string) grpc.DialOption {
 }
 
 func (g *grpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header map[string][]string
+	var header gmetadata.MD
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
 		header = metadata.Copy(md).AsHTTP2()
 	} else {
-		header = make(map[string][]string, 2)
+		header = make(gmetadata.MD, 4)
 	}
 	if opts.RequestMetadata != nil {
 		for k, v := range opts.RequestMetadata {
@@ -87,9 +87,11 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 		}
 	}
 	// set timeout in nanoseconds
-	header["grpc-timeout"] = append(header["grpc-timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
-	header["timeout"] = append(header["timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
-	header["content-type"] = append(header["content-type"], req.ContentType())
+	if opts.RequestTimeout > time.Duration(0) {
+		header.Set("grpc-timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+		header.Set("timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+	}
+	header.Set("content-type", req.ContentType())
 
 	ctx = gmetadata.NewOutgoingContext(ctx, header)
 
@@ -185,21 +187,19 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 }
 
 func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header map[string][]string
+	var header gmetadata.MD
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
 		header = metadata.Copy(md).AsHTTP2()
 	} else {
-		header = make(map[string][]string)
+		header = make(gmetadata.MD, 4)
 	}
 
-	// set timeout in nanoseconds
-	if opts.StreamTimeout > time.Duration(0) {
-		header["grpc-timeout"] = append(header["grpc-timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
-		header["timeout"] = append(header["timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
+	if opts.RequestTimeout > time.Duration(0) {
+		header.Set("grpc-timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+		header.Set("timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
 	}
-	// set the content type for the request
-	header["content-type"] = append(header["content-type"], req.ContentType())
+	header.Set("content-type", req.ContentType())
 
 	ctx = gmetadata.NewOutgoingContext(ctx, header)