drone/internal/githook/githook.go
2023-07-12 15:49:06 +00:00

100 lines
2.8 KiB
Go

// Copyright 2022 Harness Inc. All rights reserved.
// Use of this source code is governed by the Polyform Free Trial License
// that can be found in the LICENSE.md file for this repository.
package githook
import (
"context"
"fmt"
"net/http"
"strings"
"time"
"github.com/harness/gitness/githook"
"github.com/harness/gitness/internal/api/request"
"github.com/harness/gitness/types"
"github.com/harness/gitness/version"
"github.com/rs/zerolog/log"
)
var (
// ExecutionTimeout is the timeout used for githook CLI runs.
ExecutionTimeout = 3 * time.Minute
)
// GenerateEnvironmentVariables generates the required environment variables for a payload
// constructed from the provided parameters.
func GenerateEnvironmentVariables(
ctx context.Context,
apiBaseURL string,
repoID int64,
principalID int64,
disabled bool,
) (map[string]string, error) {
// best effort retrieving of requestID - log in case we can't find it but don't fail operation.
requestID, ok := request.RequestIDFrom(ctx)
if !ok {
log.Ctx(ctx).Warn().Msg("operation doesn't have a requestID in the context - generate githook payload without")
}
// generate githook base url
baseURL := strings.TrimLeft(apiBaseURL, "/") + "/v1/internal/git-hooks"
payload := &types.GithookPayload{
BaseURL: baseURL,
RepoID: repoID,
PrincipalID: principalID,
RequestID: requestID,
Disabled: disabled,
}
if err := payload.Validate(); err != nil {
return nil, fmt.Errorf("generated payload is invalid: %w", err)
}
return githook.GenerateEnvironmentVariables(payload)
}
// LoadFromEnvironment returns a new githook.CLICore created by loading the payload from the environment variable.
func LoadFromEnvironment() (*githook.CLICore, error) {
payload, err := githook.LoadPayloadFromEnvironment[*types.GithookPayload]()
if err != nil {
return nil, fmt.Errorf("failed to load payload from environment: %w", err)
}
// ensure we return disabled error in case it's explicitly disabled (will result in no-op)
if payload.Disabled {
return nil, githook.ErrDisabled
}
if err := payload.Validate(); err != nil {
return nil, fmt.Errorf("payload validation failed: %w", err)
}
return githook.NewCLICore(
githook.NewClient(
http.DefaultClient,
payload.BaseURL,
func(r *http.Request) *http.Request {
// add query params
query := r.URL.Query()
query.Add(request.QueryParamRepoID, fmt.Sprint(payload.RepoID))
query.Add(request.QueryParamPrincipalID, fmt.Sprint(payload.PrincipalID))
r.URL.RawQuery = query.Encode()
// add headers
if len(payload.RequestID) > 0 {
r.Header.Add(request.HeaderRequestID, payload.RequestID)
}
r.Header.Add(request.HeaderUserAgent, fmt.Sprintf("Gitness/%s", version.Version))
return r
},
),
ExecutionTimeout,
), nil
}