248 lines
6.6 KiB
Go
248 lines
6.6 KiB
Go
package web
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import (
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"fmt"
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"os"
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"regexp"
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"github.com/gin-gonic/gin"
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"github.com/square/go-jose"
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log "github.com/Sirupsen/logrus"
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"github.com/drone/drone/bus"
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"github.com/drone/drone/model"
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"github.com/drone/drone/queue"
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"github.com/drone/drone/remote"
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"github.com/drone/drone/shared/httputil"
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"github.com/drone/drone/shared/token"
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"github.com/drone/drone/store"
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"github.com/drone/drone/yaml"
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)
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var (
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droneYml = os.Getenv("BUILD_CONFIG_FILE")
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droneSec string
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)
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func init() {
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if droneYml == "" {
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droneYml = ".drone.yml"
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}
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droneSec = fmt.Sprintf("%s.sig", droneYml)
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}
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var skipRe = regexp.MustCompile(`\[(?i:ci *skip|skip *ci)\]`)
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func PostHook(c *gin.Context) {
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remote_ := remote.FromContext(c)
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tmprepo, build, err := remote_.Hook(c.Request)
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if err != nil {
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log.Errorf("failure to parse hook. %s", err)
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c.AbortWithError(400, err)
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return
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}
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if build == nil {
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c.Writer.WriteHeader(200)
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return
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}
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if tmprepo == nil {
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log.Errorf("failure to ascertain repo from hook.")
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c.Writer.WriteHeader(400)
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return
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}
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// skip the build if any case-insensitive combination of the words "skip" and "ci"
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// wrapped in square brackets appear in the commit message
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skipMatch := skipRe.FindString(build.Message)
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if len(skipMatch) > 0 {
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log.Infof("ignoring hook. %s found in %s", skipMatch, build.Commit)
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c.Writer.WriteHeader(204)
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return
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}
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repo, err := store.GetRepoOwnerName(c, tmprepo.Owner, tmprepo.Name)
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if err != nil {
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log.Errorf("failure to find repo %s/%s from hook. %s", tmprepo.Owner, tmprepo.Name, err)
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c.AbortWithError(404, err)
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return
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}
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// get the token and verify the hook is authorized
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parsed, err := token.ParseRequest(c.Request, func(t *token.Token) (string, error) {
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return repo.Hash, nil
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})
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if err != nil {
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log.Errorf("failure to parse token from hook for %s. %s", repo.FullName, err)
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c.AbortWithError(400, err)
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return
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}
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if parsed.Text != repo.FullName {
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log.Errorf("failure to verify token from hook. Expected %s, got %s", repo.FullName, parsed.Text)
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c.AbortWithStatus(403)
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return
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}
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if repo.UserID == 0 {
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log.Warnf("ignoring hook. repo %s has no owner.", repo.FullName)
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c.Writer.WriteHeader(204)
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return
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}
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var skipped = true
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if (build.Event == model.EventPush && repo.AllowPush) ||
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(build.Event == model.EventPull && repo.AllowPull) ||
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(build.Event == model.EventDeploy && repo.AllowDeploy) ||
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(build.Event == model.EventTag && repo.AllowTag) {
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skipped = false
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}
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if skipped {
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log.Infof("ignoring hook. repo %s is disabled for %s events.", repo.FullName, build.Event)
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c.Writer.WriteHeader(204)
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return
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}
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user, err := store.GetUser(c, repo.UserID)
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if err != nil {
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log.Errorf("failure to find repo owner %s. %s", repo.FullName, err)
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c.AbortWithError(500, err)
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return
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}
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// if there is no email address associated with the pull request,
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// we lookup the email address based on the authors github login.
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//
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// my initial hesitation with this code is that it has the ability
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// to expose your email address. At the same time, your email address
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// is already exposed in the public .git log. So while some people will
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// a small number of people will probably be upset by this, I'm not sure
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// it is actually that big of a deal.
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if len(build.Email) == 0 {
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author, err := store.GetUserLogin(c, build.Author)
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if err == nil {
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build.Email = author.Email
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}
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}
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// if the remote has a refresh token, the current access token
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// may be stale. Therefore, we should refresh prior to dispatching
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// the job.
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if refresher, ok := remote_.(remote.Refresher); ok {
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ok, _ := refresher.Refresh(user)
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if ok {
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store.UpdateUser(c, user)
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}
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}
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// fetch the build file from the database
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raw, err := remote_.File(user, repo, build, droneYml)
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if err != nil {
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log.Errorf("failure to get build config for %s. %s", repo.FullName, err)
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c.AbortWithError(404, err)
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return
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}
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sec, err := remote_.File(user, repo, build, droneSec)
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if err != nil {
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log.Debugf("cannot find build secrets for %s. %s", repo.FullName, err)
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// NOTE we don't exit on failure. The sec file is optional
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}
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axes, err := yaml.ParseMatrix(raw)
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if err != nil {
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c.String(500, "Failed to parse yaml file or calculate matrix. %s", err)
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return
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}
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if len(axes) == 0 {
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axes = append(axes, yaml.Axis{})
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}
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netrc, err := remote_.Netrc(user, repo)
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if err != nil {
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c.String(500, "Failed to generate netrc file. %s", err)
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return
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}
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// verify the branches can be built vs skipped
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branches := yaml.ParseBranch(raw)
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if !branches.Matches(build.Branch) && build.Event != model.EventTag && build.Event != model.EventDeploy {
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c.String(200, "Branch does not match restrictions defined in yaml")
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return
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}
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// update some build fields
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build.Status = model.StatusPending
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build.RepoID = repo.ID
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// and use a transaction
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var jobs []*model.Job
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for num, axis := range axes {
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jobs = append(jobs, &model.Job{
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BuildID: build.ID,
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Number: num + 1,
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Status: model.StatusPending,
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Environment: axis,
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})
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}
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err = store.CreateBuild(c, build, jobs...)
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if err != nil {
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log.Errorf("failure to save commit for %s. %s", repo.FullName, err)
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c.AbortWithError(500, err)
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return
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}
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c.JSON(200, build)
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url := fmt.Sprintf("%s/%s/%d", httputil.GetURL(c.Request), repo.FullName, build.Number)
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err = remote_.Status(user, repo, build, url)
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if err != nil {
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log.Errorf("error setting commit status for %s/%d", repo.FullName, build.Number)
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}
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// get the previous build so that we can send
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// on status change notifications
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last, _ := store.GetBuildLastBefore(c, repo, build.Branch, build.ID)
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secs, err := store.GetSecretList(c, repo)
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if err != nil {
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log.Errorf("Error getting secrets for %s#%d. %s", repo.FullName, build.Number, err)
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}
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var signed bool
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var verified bool
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signature, err := jose.ParseSigned(string(sec))
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if err != nil {
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log.Debugf("cannot parse .drone.yml.sig file. %s", err)
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} else if len(sec) == 0 {
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log.Debugf("cannot parse .drone.yml.sig file. empty file")
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} else {
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signed = true
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output, err := signature.Verify([]byte(repo.Hash))
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if err != nil {
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log.Debugf("cannot verify .drone.yml.sig file. %s", err)
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} else if string(output) != string(raw) {
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log.Debugf("cannot verify .drone.yml.sig file. no match")
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} else {
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verified = true
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}
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}
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log.Debugf(".drone.yml is signed=%v and verified=%v", signed, verified)
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bus.Publish(c, bus.NewBuildEvent(bus.Enqueued, repo, build))
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for _, job := range jobs {
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queue.Publish(c, &queue.Work{
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Signed: signed,
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Verified: verified,
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User: user,
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Repo: repo,
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Build: build,
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BuildLast: last,
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Job: job,
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Netrc: netrc,
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Yaml: string(raw),
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Secrets: secs,
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System: &model.System{Link: httputil.GetURL(c.Request)},
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})
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}
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}
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