writer

w := NewCheckStyle(os.Stdout)
for _, e := range testErrs {
	w.Write(e)
}
w.Flush()

Output:

<?xml version="1.0" encoding="UTF-8"?>
<checkstyle version="1.0">
  <file name="file2">
    <error column="14" line="2" message="emacs" severity="error 1" source="E1"></error>
    <error column="1" line="14" message="neovim" severity="error 14" source="E14"></error>
  </file>
  <file name="path/to/file1">
    <error column="14" line="1" message="hello" severity="warning"></error>
    <error column="14" line="2" message="vim" severity="info"></error>
  </file>
</checkstyle>

w := NewJSONL(os.Stdout)
for _, e := range testErrs {
	w.Write(e)
}

Output:

{"filename":"path/to/file1","lnum":1,"end_lnum":2,"col":14,"end_col":15,"vcol":false,"nr":0,"pattern":"","text":"hello","type":87,"valid":false,"lines":["path/to/file1:1:14:[W] hello"]}
{"filename":"path/to/file1","lnum":2,"end_lnum":0,"col":14,"end_col":0,"vcol":false,"nr":0,"pattern":"","text":"vim","type":73,"valid":false,"lines":["path/to/file1:2:14:[I] vim"]}
{"filename":"file2","lnum":2,"end_lnum":0,"col":14,"end_col":0,"vcol":false,"nr":1,"pattern":"","text":"emacs","type":69,"valid":false,"lines":["file2:2:14:[E] emacs"]}
{"filename":"file2","lnum":14,"end_lnum":0,"col":1,"end_col":0,"vcol":false,"nr":14,"pattern":"","text":"neovim","type":69,"valid":false,"lines":["file2:14:1:[E] neovim"]}

w, _ := NewSarif(os.Stdout, SarifOption{ToolName: "super-linter"})
for _, e := range testErrs {
	w.Write(e)
}
w.Flush()

Output:

{
  "$schema": "http://json.schemastore.org/sarif-2.1.0-rtm.4",
  "runs": [
    {
      "results": [
        {
          "level": "warning",
          "locations": [
            {
              "physicalLocation": {
                "artifactLocation": {
                  "uri": "path/to/file1",
                  "uriBaseId": "%SRCROOT%"
                },
                "region": {
                  "endColumn": 15,
                  "endLine": 2,
                  "startColumn": 14,
                  "startLine": 1
                }
              }
            }
          ],
          "message": {
            "text": "hello"
          }
        },
        {
          "level": "note",
          "locations": [
            {
              "physicalLocation": {
                "artifactLocation": {
                  "uri": "path/to/file1",
                  "uriBaseId": "%SRCROOT%"
                },
                "region": {
                  "startColumn": 14,
                  "startLine": 2
                }
              }
            }
          ],
          "message": {
            "text": "vim"
          }
        },
        {
          "level": "error",
          "locations": [
            {
              "physicalLocation": {
                "artifactLocation": {
                  "uri": "file2",
                  "uriBaseId": "%SRCROOT%"
                },
                "region": {
                  "startColumn": 14,
                  "startLine": 2
                }
              }
            }
          ],
          "message": {
            "text": "emacs"
          }
        },
        {
          "level": "error",
          "locations": [
            {
              "physicalLocation": {
                "artifactLocation": {
                  "uri": "file2",
                  "uriBaseId": "%SRCROOT%"
                },
                "region": {
                  "startColumn": 1,
                  "startLine": 14
                }
              }
            }
          ],
          "message": {
            "text": "neovim"
          }
        }
      ],
      "tool": {
        "driver": {
          "name": "super-linter"
        }
      }
    }
  ],
  "version": "2.1.0"
}

tmpl, _ := template.New("example").Parse("file:{{.Filename}}\tline:{{.Lnum}}\tcol:{{.Col}}\tmes:{{.Text}}")
w := NewTemplate(tmpl, os.Stdout)
for _, e := range testErrs {
	w.Write(e)
}

Output:

file:path/to/file1	line:1	col:14	mes:hello
file:path/to/file1	line:2	col:14	mes:vim
file:file2	line:2	col:14	mes:emacs
file:file2	line:14	col:1	mes:neovim

tmpl, _ := template.New("example").Parse("{{.String}}")
w := NewTemplate(tmpl, os.Stdout)
for _, e := range testErrs {
	w.Write(e)
}

Output:

path/to/file1|1-2 col 14-15 warning| hello
path/to/file1|2 col 14 info| vim
file2|2 col 14 error 1| emacs
file2|14 col 1 error 14| neovim