repo: fix the helper that applies the governance files

CHANGELOG.md

@@ -45,6 +45,12 @@
   端口转发占着（Windows 上更具体的 `127.0.0.1` 监听会盖过 agent 的 `0.0.0.0`），devctl 于是
   连到了陌生人身上并永远等回复。现在两套自测**默认向系统要一个空闲端口**
   （`-Port` / `--port` 仍可指定），指定的端口已被占用时立刻报错退出（退出码 2）。
+- `tools/create-github-repo.ps1` 在 squash 关闭时会被 GitHub 拒掉（`no_squash_merge_strategy`，
+  422）——治理文件里还留着 `squash_merge_commit_message` / `squash_merge_commit_title` /
+  `merge_commit_title`，而 GitHub 不允许给已关闭的合并策略设置这些字段。现在只发送
+  **当前启用**且有值的字段，治理文件也不再保留这三项（本次对齐线上设置时就是这么被拒的）。
+- `tools/create-github-repo.ps1 -DryRun` 不再改动本地仓库：`git remote add/set-url` 与
+  `git branch -M main` 移进了真正推送的分支——以前 dry-run 也会把**当前分支**改名成 `main`。
 - `cli/devctl.ps1` 的连接没有超时（`devctl.py` 一直是 15 秒），端口不通时脚本会一直挂着。
   现在两版一致：连不上或超时在 15 秒内报错退出（退出码 1），错误信息也去掉了 .NET 包装。
 

governance/repository-settings.json

@@ -12,9 +12,6 @@
   "allow_rebase_merge": true,
   "allow_auto_merge": false,
   "delete_branch_on_merge": true,
-  "squash_merge_commit_message": "COMMIT_MESSAGES",
-  "squash_merge_commit_title": "PR_TITLE",
-  "merge_commit_title": "PR_TITLE",
   "topics": [
     "serial", "uart", "embedded", "debugging", "busybox",
     "serial-console", "remote-debugging", "yocto", "devctl"

tools/create-github-repo.ps1

@@ -107,6 +107,20 @@ try {
   $settings = Get-Content -Raw "$root\governance\repository-settings.json" | ConvertFrom-Json
   $protection = Get-Content -Raw "$root\governance\branch-protection.json" | ConvertFrom-Json
 
+  # GitHub refuses the squash/merge title fields while that strategy is off
+  # ("no_squash_merge_strategy"), so only send the ones the enabled strategies
+  # can carry -- and only when the settings file still lists them.
+  $settingsKeys = @($settings.PSObject.Properties.Name)
+  $mergeFields = @{}
+  if ($settings.allow_squash_merge) {
+    foreach ($k in @('squash_merge_commit_message', 'squash_merge_commit_title')) {
+      if ($settingsKeys -contains $k) { $mergeFields[$k] = $settings.$k }
+    }
+  }
+  if ($settings.allow_merge_commit -and $settingsKeys -contains 'merge_commit_title') {
+    $mergeFields['merge_commit_title'] = $settings.merge_commit_title
+  }
+
   # ---- 1. create repository ----
   Write-Host "==> repository"
   $existing = $null
@@ -116,7 +130,7 @@ try {
   if ($existing) {
     Write-Host "    exists: $($existing.full_name) (visibility=$($existing.private))"
     try {
-    Invoke-Gh 'PATCH' "$api/repos/$Owner/$Repo" @{
+    Invoke-Gh 'PATCH' "$api/repos/$Owner/$Repo" (@{
       description              = $settings.description
       has_issues               = [bool]$settings.has_issues
       has_projects             = [bool]$settings.has_projects
@@ -127,10 +141,7 @@ try {
       allow_rebase_merge       = [bool]$settings.allow_rebase_merge
       allow_auto_merge         = [bool]$settings.allow_auto_merge
       delete_branch_on_merge   = [bool]$settings.delete_branch_on_merge
-      squash_merge_commit_message = $settings.squash_merge_commit_message
-      squash_merge_commit_title  = $settings.squash_merge_commit_title
-      merge_commit_title         = $settings.merge_commit_title
-    } 'patch' | Out-Null
+    } + $mergeFields) 'patch' | Out-Null
       Write-Host '    settings updated'
     } catch {
       Write-Host '    warn: this token cannot update repository settings (needs administration:write)'
@@ -146,14 +157,12 @@ try {
       has_projects             = [bool]$settings.has_projects
       has_wiki                 = [bool]$settings.has_wiki
       auto_init                = $false
-      squash_merge_commit_message = $settings.squash_merge_commit_message
-      squash_merge_commit_title  = $settings.squash_merge_commit_title
-      merge_commit_title         = $settings.merge_commit_title
       allow_squash_merge       = [bool]$settings.allow_squash_merge
       allow_merge_commit       = [bool]$settings.allow_merge_commit
       allow_rebase_merge       = [bool]$settings.allow_rebase_merge
       delete_branch_on_merge   = [bool]$settings.delete_branch_on_merge
     }
+    $body += $mergeFields
     Invoke-Gh 'POST' "$api/users/$Owner/repos" $body 'create' | Out-Null
     Write-Host "    created $Owner/$Repo"
   }
@@ -174,10 +183,10 @@ try {
   # ---- 2. push ----
   Write-Host "==> push"
   $remoteUrl = "https://github.com/$Owner/$Repo.git"
-  $has = (& git remote get-url origin 2>$null)
-  if ($LASTEXITCODE -ne 0) { & git remote add origin $remoteUrl } else { & git remote set-url origin $remoteUrl }
-  & git branch -M $BaseBranch
   if (-not $DryRun) {
+    $has = (& git remote get-url origin 2>$null)
+    if ($LASTEXITCODE -ne 0) { & git remote add origin $remoteUrl } else { & git remote set-url origin $remoteUrl }
+    & git branch -M $BaseBranch
     & git -c "http.extraheader=AUTHORIZATION: basic $([Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes("$($Owner):$Token")))" `
         push --quiet -u origin $BaseBranch
     if ($LASTEXITCODE -ne 0) {