refactor to rename pull_request to hosting_service and apply SRP

pkg/commands/hosting_service/definitions.go

@@ -0,0 +1,54 @@
+package hosting_service
+
+// if you want to make a custom regex for a given service feel free to test it out
+// at regoio.herokuapp.com
+var defaultUrlRegexStrings = []string{
+	`^(?:https?|ssh)://.*/(?P<owner>.*)/(?P<repo>.*?)(?:\.git)?$`,
+	`^git@.*:(?P<owner>.*)/(?P<repo>.*?)(?:\.git)?$`,
+}
+
+// we've got less type safety using go templates but this lends itself better to
+// users adding custom service definitions in their config
+var githubServiceDef = ServiceDefinition{
+	provider:                        "github",
+	pullRequestURLIntoDefaultBranch: "/compare/{{.From}}?expand=1",
+	pullRequestURLIntoTargetBranch:  "/compare/{{.To}}...{{.From}}?expand=1",
+	commitURL:                       "/commit/{{.CommitSha}}",
+	regexStrings:                    defaultUrlRegexStrings,
+}
+
+var bitbucketServiceDef = ServiceDefinition{
+	provider:                        "bitbucket",
+	pullRequestURLIntoDefaultBranch: "/pull-requests/new?source={{.From}}&t=1",
+	pullRequestURLIntoTargetBranch:  "/pull-requests/new?source={{.From}}&dest={{.To}}&t=1",
+	commitURL:                       "/commits/{{.CommitSha}}",
+	regexStrings:                    defaultUrlRegexStrings,
+}
+
+var gitLabServiceDef = ServiceDefinition{
+	provider:                        "gitlab",
+	pullRequestURLIntoDefaultBranch: "/merge_requests/new?merge_request[source_branch]={{.From}}",
+	pullRequestURLIntoTargetBranch:  "/merge_requests/new?merge_request[source_branch]={{.From}}&merge_request[target_branch]={{.To}}",
+	commitURL:                       "/commit/{{.CommitSha}}",
+	regexStrings:                    defaultUrlRegexStrings,
+}
+
+var serviceDefinitions = []ServiceDefinition{githubServiceDef, bitbucketServiceDef, gitLabServiceDef}
+
+var defaultServiceDomains = []ServiceDomain{
+	{
+		serviceDefinition: githubServiceDef,
+		gitDomain:         "github.com",
+		webDomain:         "github.com",
+	},
+	{
+		serviceDefinition: bitbucketServiceDef,
+		gitDomain:         "bitbucket.org",
+		webDomain:         "bitbucket.org",
+	},
+	{
+		serviceDefinition: gitLabServiceDef,
+		gitDomain:         "gitlab.com",
+		webDomain:         "gitlab.com",
+	},
+}