Extract code from Symfony CLI

Author: tucksaun

LICENSE

@@ -0,0 +1,95 @@
+package terminal
+
+import (
+	"bytes"
+	"fmt"
+	"strings"
+)
+
+func FormatBlockMessage(format string, msg string) string {
+	var buf bytes.Buffer
+
+	width, _ := GetSize()
+
+	lines, maxLen := splitsBlockLines(msg, width-4) // 2 spaces on the left, 2 on the right
+	fullPadding := strings.Repeat(" ", maxLen+4)
+
+	buf.WriteString(fmt.Sprintf("<%s>", format))
+	buf.WriteString(fullPadding)
+	buf.WriteString("</>\n")
+	for _, line := range lines {
+		buf.WriteString(fmt.Sprintf("<%s>  ", format))
+		lenLine, _ := Stdout.GetFormatter().Format([]byte(line), &buf)
+		if n := maxLen - lenLine; n >= 0 {
+			buf.WriteString(strings.Repeat(" ", n))
+		}
+		buf.WriteString("  </>\n")
+	}
+	buf.WriteString(fmt.Sprintf("<%s>", format))
+	buf.WriteString(fullPadding)
+	buf.WriteString("</>\n")
+
+	return buf.String()
+}
+
+func splitsBlockLines(msg string, width int) ([]string, int) {
+	lines := []string{}
+	maxLen := 0
+	// this can happen in headless mode, like running tests for example
+	if width <= 0 {
+		width = 80
+	}
+
+	for _, line := range strings.Split(msg, "\n") {
+		line = strings.Replace(line, "\t", "        ", -1)
+		lastLinePos := 0
+		inAnOpeningTag := false
+		inAClosingTag := false
+		inATagBody := false
+		length := 0
+		var lastChar rune
+		for pos, char := range line {
+			if char == '<' && lastChar != '\\' {
+				if len(line) > pos+1 && line[pos+1] == '/' {
+					inAClosingTag = true
+					inATagBody = false
+				} else {
+					inAnOpeningTag = true
+				}
+			}
+
+			if !inAClosingTag && !inAnOpeningTag {
+				length += 1
+			}
+
+			if char == '>' && lastChar != '\\' {
+				if inAnOpeningTag {
+					inAnOpeningTag = false
+					inATagBody = true
+				} else {
+					inAClosingTag = false
+					inATagBody = false
+				}
+			}
+
+			if length >= width && !inAClosingTag && !inAnOpeningTag && !inATagBody {
+				lines = append(lines, line[lastLinePos:pos+1])
+				maxLen = width
+				lastLinePos = pos + 1
+				length = 0
+			}
+
+			lastChar = char
+		}
+
+		if lastLinePos < len(line) {
+			lines = append(lines, line[lastLinePos:])
+			if length > maxLen {
+				maxLen = length
+			}
+
+		}
+	}
+
+	return lines, maxLen
+}

block.go

@@ -0,0 +1,33 @@
+package terminal
+
+import (
+	. "gopkg.in/check.v1"
+)
+
+type OutputBlockSuite struct{}
+
+var _ = Suite(&OutputBlockSuite{})
+
+func (ts *OutputBlockSuite) TestSplitsBlockLines(c *C) {
+	lines, maxLen := splitsBlockLines("Foo Bazz", 3)
+	c.Assert(lines, DeepEquals, []string{"Foo", " Ba", "zz"})
+	c.Assert(maxLen, Equals, 3)
+
+	lines, maxLen = splitsBlockLines("<href=https://example.com>Foo</>", 3)
+	c.Assert(lines, DeepEquals, []string{"<href=https://example.com>Foo</>"})
+	c.Assert(maxLen, Equals, 3)
+
+	lines, maxLen = splitsBlockLines("<href=https://example.com>Foo</>Bar", 3)
+	c.Assert(lines, DeepEquals, []string{"<href=https://example.com>Foo</>", "Bar"})
+	c.Assert(maxLen, Equals, 3)
+
+	lines, maxLen = splitsBlockLines("<href=https://example.com>Foo Bar</>Baz", 3)
+	c.Assert(lines, DeepEquals, []string{"<href=https://example.com>Foo Bar</>", "Baz"})
+	c.Assert(maxLen, Equals, 3)
+}
+
+func (ts *OutputBlockSuite) TestSplitsBlockLinesDonotPanic(c *C) {
+	lines, maxLen := splitsBlockLines("Foo Baz<", 4)
+	c.Assert(lines, DeepEquals, []string{"Foo ", "Baz<"})
+	c.Assert(maxLen, Equals, 4)
+}

block_test.go

@@ -0,0 +1,54 @@
+package terminal
+
+import "os"
+
+// from https://github.com/watson/ci-info/blob/master/vendors.json
+var ciEnvs = []string{
+	"APPVEYOR",
+	"SYSTEM_TEAMFOUNDATIONCOLLECTIONURI",
+	"bamboo_planKey",
+	"BITBUCKET_COMMIT",
+	"BITRISE_IO",
+	"BUDDY_WORKSPACE_ID",
+	"BUILDKITE",
+	"CIRCLECI",
+	"CIRRUS_CI",
+	"CODEBUILD_BUILD_ARN",
+	"CI_NAME",
+	"DRONE",
+	"DSARI",
+	"GITLAB_CI",
+	"GO_PIPELINE_LABEL",
+	"HUDSON_URL",
+	"JENKINS_URL",
+	"BUILD_ID",
+	"MAGNUM",
+	"NETLIFY_BUILD_BASE",
+	"NEVERCODE",
+	"SAILCI",
+	"SEMAPHORE",
+	"SHIPPABLE",
+	"TDDIUM",
+	"STRIDER",
+	"TASK_ID",
+	"RUN_ID",
+	"TEAMCITY_VERSION",
+	"TRAVIS",
+	"GITHUB_ACTIONS",
+	"NOW_BUILDER",
+	"APPCENTER_BUILD_ID",
+}
+
+func IsCI() bool {
+	if os.Getenv("DEBIAN_FRONTEND") == "noninteractive" {
+		return true
+	}
+
+	for _, env := range ciEnvs {
+		if _, hasEnv := os.LookupEnv(env); hasEnv {
+			return true
+		}
+	}
+
+	return false
+}