From 4f41f6b2f1d325edbbff8f6e828e5375f70ec983 Mon Sep 17 00:00:00 2001
From: Lukasz Mierzwa <lukasz@cloudflare.com>
Date: Tue, 16 Jul 2024 18:15:14 +0100
Subject: [PATCH] Truncate BB comments that are too long

---
 docs/changelog.md                            |  7 ++++
 go.mod                                       |  2 +-
 go.sum                                       |  4 +-
 internal/reporter/bitbucket_api.go           | 12 +++++-
 internal/reporter/bitbucket_comments_test.go | 44 ++++++++++++++++++++
 internal/reporter/github.go                  |  2 +-
 6 files changed, 66 insertions(+), 5 deletions(-)

diff --git a/docs/changelog.md b/docs/changelog.md
index 76f16ab4..13a55147 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## v0.62.2
+
+### Fixed
+
+- When using BitBucket reporter `pint ci` might create a comment longer than the limit allowed by BitBucket.
+  To avoid this pint will now truncate long comments.
+
 ## v0.62.1
 
 ### Fixed
diff --git a/go.mod b/go.mod
index b536dab0..62abb63f 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/fatih/color v1.17.0
 	github.com/gkampitakis/go-snaps v0.5.4
 	github.com/google/go-cmp v0.6.0
-	github.com/google/go-github/v62 v62.0.0
+	github.com/google/go-github/v63 v63.0.0
 	github.com/hashicorp/hcl/v2 v2.21.0
 	github.com/klauspost/compress v1.17.9
 	github.com/neilotoole/slogt v1.1.0
diff --git a/go.sum b/go.sum
index 473ccd74..5aac2cb5 100644
--- a/go.sum
+++ b/go.sum
@@ -63,8 +63,8 @@ github.com/golang/snappy v0.0.4/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEW
 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/go-github/v62 v62.0.0 h1:/6mGCaRywZz9MuHyw9gD1CwsbmBX8GWsbFkwMmHdhl4=
-github.com/google/go-github/v62 v62.0.0/go.mod h1:EMxeUqGJq2xRu9DYBMwel/mr7kZrzUOfQmmpYrZn2a4=
+github.com/google/go-github/v63 v63.0.0 h1:13xwK/wk9alSokujB9lJkuzdmQuVn2QCPeck76wR3nE=
+github.com/google/go-github/v63 v63.0.0/go.mod h1:IqbcrgUmIcEaioWrGYei/09o+ge5vhffGOcxrO0AfmA=
 github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
 github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
diff --git a/internal/reporter/bitbucket_api.go b/internal/reporter/bitbucket_api.go
index d920c9bf..8d2230b1 100644
--- a/internal/reporter/bitbucket_api.go
+++ b/internal/reporter/bitbucket_api.go
@@ -33,6 +33,8 @@ const (
 	NumberType     DataType = "NUMBER"
 	PercentageType DataType = "PERCENTAGE"
 	TextType       DataType = "TEXT"
+
+	maxCommentLength = 32768
 )
 
 type BitBucketReportData struct {
@@ -639,11 +641,19 @@ func (bb bitBucketAPI) makeComments(summary Summary, changes *bitBucketPRChanges
 			severity = "NORMAL"
 		}
 
+		var text string
+		// BitBucket has a max comment length limit. If we hit it then truncate the comment.
+		if buf.Len() > maxCommentLength {
+			text = buf.String()[:maxCommentLength-4] + " ..."
+		} else {
+			text = buf.String()
+		}
+
 		pending := pendingComment{
 			severity: severity,
 			path:     reports[0].Path.SymlinkTarget,
 			line:     reports[0].Problem.Lines.Last,
-			text:     buf.String(),
+			text:     text,
 			anchor:   reports[0].Problem.Anchor,
 		}
 		comments = append(comments, pending.toBitBucketComment(changes))
diff --git a/internal/reporter/bitbucket_comments_test.go b/internal/reporter/bitbucket_comments_test.go
index e73ebb7f..ec908269 100644
--- a/internal/reporter/bitbucket_comments_test.go
+++ b/internal/reporter/bitbucket_comments_test.go
@@ -3,6 +3,7 @@ package reporter
 import (
 	"fmt"
 	"log/slog"
+	"strings"
 	"testing"
 	"time"
 
@@ -563,6 +564,49 @@ func TestBitBucketMakeComments(t *testing.T) {
 				},
 			},
 		},
+		{
+			description: "truncate long comments",
+			maxComments: 2,
+			summary: Summary{reports: []Report{
+				{
+					Path: discovery.Path{
+						SymlinkTarget: "rule.yaml",
+						Name:          "rule.yaml",
+					},
+					ModifiedLines: []int{2, 3},
+					Problem: checks.Problem{
+						Severity: checks.Bug,
+						Lines: parser.LineRange{
+							First: 2,
+							Last:  2,
+						},
+						Text:     strings.Repeat("X", maxCommentLength+1),
+						Reporter: "r1",
+					},
+				},
+			}},
+			changes: &bitBucketPRChanges{
+				pathModifiedLines: map[string][]int{
+					"rule.yaml": {2, 3},
+				},
+				pathLineMapping: map[string]map[int]int{
+					"rule.yaml": {2: 2, 3: 3},
+				},
+			},
+			comments: []BitBucketPendingComment{
+				{
+					Text:     ":stop_sign: **Bug** reported by [pint](https://cloudflare.github.io/pint/) **r1** check.\n\n------\n\n" + strings.Repeat("X", maxCommentLength-98-4) + " ...",
+					Severity: "BLOCKER",
+					Anchor: BitBucketPendingCommentAnchor{
+						Path:     "rule.yaml",
+						Line:     2,
+						LineType: "ADDED",
+						FileType: "TO",
+						DiffType: "EFFECTIVE",
+					},
+				},
+			},
+		},
 	}
 
 	for _, tc := range testCases {
diff --git a/internal/reporter/github.go b/internal/reporter/github.go
index 25b4e9cf..2ea62a70 100644
--- a/internal/reporter/github.go
+++ b/internal/reporter/github.go
@@ -9,7 +9,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/google/go-github/v62/github"
+	"github.com/google/go-github/v63/github"
 	"golang.org/x/oauth2"
 
 	"github.com/cloudflare/pint/internal/checks"