Dynamic forge request size (#2622)

and remove checks for gitea 1.18 which is quite old already and
shouldn't be used anymore

closes https://github.com/woodpecker-ci/woodpecker/issues/1038

docs/docs/30-administration/11-forges/10-overview.md

@@ -9,6 +9,4 @@
 | Event: Pull-Request | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: |
 | Event: Deploy | :white_check_mark: | :x: | :x: | :x: |
 | [Multiple workflows](../../20-usage/25-workflows.md) | :white_check_mark: | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| [when.path filter](../../20-usage/20-workflow-syntax.md#path) | :white_check_mark: | :white_check_mark:¹ | :white_check_mark: | :x: |
+| [when.path filter](../../20-usage/20-workflow-syntax.md#path) | :white_check_mark: | :white_check_mark: | :white_check_mark: | :x: |
-
-¹ for pull requests at least Gitea version 1.17 is required

server/forge/gitea/gitea.go

@@ -47,7 +47,7 @@ import (
 const (
 	authorizeTokenURL = "%s/login/oauth/authorize"
 	accessTokenURL    = "%s/login/oauth/access_token"
-	perPage           = 50
+	defaultPageSize   = 50
 	giteaDevVersion   = "v1.18.0"
 )
 
@@ -56,6 +56,7 @@ type Gitea struct {
 	ClientID     string
 	ClientSecret string
 	SkipVerify   bool
+	pageSize     int
 }
 
 // Opts defines configuration options.
@@ -207,7 +208,7 @@ func (c *Gitea) Teams(ctx context.Context, u *model.User) ([]*model.Team, error)
 			gitea.ListOrgsOptions{
 				ListOptions: gitea.ListOptions{
 					Page:     page,
-					PageSize: perPage,
+					PageSize: c.perPage(ctx),
 				},
 			},
 		)
@@ -263,7 +264,7 @@ func (c *Gitea) Repos(ctx context.Context, u *model.User) ([]*model.Repo, error)
 			gitea.ListReposOptions{
 				ListOptions: gitea.ListOptions{
 					Page:     page,
-					PageSize: perPage,
+					PageSize: c.perPage(ctx),
 				},
 			},
 		)
@@ -621,12 +622,6 @@ func (c *Gitea) getChangedFilesForPR(ctx context.Context, repo *model.Repo, inde
 		return nil, err
 	}
 
-	if client.CheckServerVersionConstraint(">= 1.18.0") != nil {
-		// version too low
-		log.Debug().Msg("Gitea version does not support getting changed files for PRs")
-		return []string{}, nil
-	}
-
 	return shared_utils.Paginate(func(page int) ([]string, error) {
 		giteaFiles, _, err := client.ListPullRequestFiles(repo.Owner, repo.Name, index,
 			gitea.ListPullRequestFilesOptions{ListOptions: gitea.ListOptions{Page: page}})
@@ -641,3 +636,19 @@ func (c *Gitea) getChangedFilesForPR(ctx context.Context, repo *model.Repo, inde
 		return files, nil
 	})
 }
+
+func (c *Gitea) perPage(ctx context.Context) int {
+	if c.pageSize == 0 {
+		client, err := c.newClientToken(ctx, "")
+		if err != nil {
+			return defaultPageSize
+		}
+
+		api, _, err := client.GetGlobalAPISettings()
+		if err != nil {
+			return defaultPageSize
+		}
+		c.pageSize = api.MaxResponseItems
+	}
+	return c.pageSize
+}