diff --git a/package-lock.json b/package-lock.json
index d184b1d..6743da7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -648,9 +648,9 @@
       }
     },
     "@sasjs/utils": {
-      "version": "2.9.0",
-      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.9.0.tgz",
-      "integrity": "sha512-j7ssEmb8OSZHUUL0PGVgoby0j0ClCcsLsydDCk/C4OAoWPAUPFI5HgGFPSEipz9+P8OlL/EBnglj4LGtlFHCpw==",
+      "version": "2.10.1",
+      "resolved": "https://registry.npmjs.org/@sasjs/utils/-/utils-2.10.1.tgz",
+      "integrity": "sha512-T54jx6NEMLu2+R/ux4qcb3dDJ7nFrKkPCkmPXEfZxPQBkbq4C0kmaZv6dC63RDH68wYhoXR2S5fION5fFh91iw==",
       "requires": {
         "@types/prompts": "^2.0.9",
         "consola": "^2.15.0",
@@ -778,9 +778,9 @@
       "dev": true
     },
     "@types/prompts": {
-      "version": "2.0.9",
-      "resolved": "https://registry.npmjs.org/@types/prompts/-/prompts-2.0.9.tgz",
-      "integrity": "sha512-TORZP+FSjTYMWwKadftmqEn6bziN5RnfygehByGsjxoK5ydnClddtv6GikGWPvCm24oI+YBwck5WDxIIyNxUrA==",
+      "version": "2.0.10",
+      "resolved": "https://registry.npmjs.org/@types/prompts/-/prompts-2.0.10.tgz",
+      "integrity": "sha512-W3PEl3l4vmxdgfY6LUG7ysh+mLJOTOFYmSpiLe6MCo1OdEm8b5s6ZJfuTQgEpYNwcMiiaRzJespPS5Py2tqLlQ==",
       "requires": {
         "@types/node": "*"
       }
diff --git a/package.json b/package.json
index 7b621a5..8a03b3b 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,6 @@
     "typescript": "^4.2.3"
   },
   "dependencies": {
-    "@sasjs/utils": "^2.9.0"
+    "@sasjs/utils": "^2.10.1"
   }
 }
diff --git a/src/index.ts b/src/index.ts
index a45d40e..7ed1b17 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,3 @@
-export { lintText, lintFile } from './lint'
+export * from './lint'
 export * from './types'
 export * from './utils'
diff --git a/src/lint.spec.ts b/src/lint.spec.ts
deleted file mode 100644
index d6d5e21..0000000
--- a/src/lint.spec.ts
+++ /dev/null
@@ -1,158 +0,0 @@
-import { lintFile, lintText, splitText } from './lint'
-import { Severity } from './types/Severity'
-import path from 'path'
-
-describe('lintText', () => {
-  it('should identify trailing spaces', async () => {
-    const text = `/**
-      @file
-    **/
-    %put 'hello'; 
-        %put 'world';  `
-    const results = await lintText(text)
-
-    expect(results.length).toEqual(2)
-    expect(results[0]).toEqual({
-      message: 'Line contains trailing spaces',
-      lineNumber: 4,
-      startColumnNumber: 18,
-      endColumnNumber: 18,
-      severity: Severity.Warning
-    })
-    expect(results[1]).toEqual({
-      message: 'Line contains trailing spaces',
-      lineNumber: 5,
-      startColumnNumber: 22,
-      endColumnNumber: 23,
-      severity: Severity.Warning
-    })
-  })
-
-  it('should identify encoded passwords', async () => {
-    const text = `/**
-      @file
-    **/
-    %put '{SAS001}';`
-    const results = await lintText(text)
-
-    expect(results.length).toEqual(1)
-    expect(results[0]).toEqual({
-      message: 'Line contains encoded password',
-      lineNumber: 4,
-      startColumnNumber: 11,
-      endColumnNumber: 19,
-      severity: Severity.Error
-    })
-  })
-
-  it('should identify missing doxygen header', async () => {
-    const text = `%put 'hello';`
-    const results = await lintText(text)
-
-    expect(results.length).toEqual(1)
-    expect(results[0]).toEqual({
-      message: 'File missing Doxygen header',
-      lineNumber: 1,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-  })
-
-  it('should return an empty list with an empty file', async () => {
-    const text = `/**
-      @file
-    **/`
-    const results = await lintText(text)
-
-    expect(results.length).toEqual(0)
-  })
-})
-
-describe('lintFile', () => {
-  it('should identify lint issues in a given file', async () => {
-    const results = await lintFile(path.join(__dirname, 'Example File.sas'))
-
-    expect(results.length).toEqual(8)
-    expect(results).toContainEqual({
-      message: 'Line contains trailing spaces',
-      lineNumber: 1,
-      startColumnNumber: 1,
-      endColumnNumber: 2,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'Line contains trailing spaces',
-      lineNumber: 2,
-      startColumnNumber: 1,
-      endColumnNumber: 2,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'File name contains spaces',
-      lineNumber: 1,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'File name contains uppercase characters',
-      lineNumber: 1,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'File missing Doxygen header',
-      lineNumber: 1,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'Line contains encoded password',
-      lineNumber: 5,
-      startColumnNumber: 10,
-      endColumnNumber: 18,
-      severity: Severity.Error
-    })
-    expect(results).toContainEqual({
-      message: 'Line is indented with a tab',
-      lineNumber: 7,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-    expect(results).toContainEqual({
-      message: 'Line has incorrect indentation - 3 spaces',
-      lineNumber: 6,
-      startColumnNumber: 1,
-      endColumnNumber: 1,
-      severity: Severity.Warning
-    })
-  })
-})
-
-describe('splitText', () => {
-  it('should return an empty array when text is falsy', () => {
-    const lines = splitText('')
-
-    expect(lines.length).toEqual(0)
-  })
-
-  it('should return an array of lines from text', () => {
-    const lines = splitText(`line 1\nline 2`)
-
-    expect(lines.length).toEqual(2)
-    expect(lines[0]).toEqual('line 1')
-    expect(lines[1]).toEqual('line 2')
-  })
-
-  it('should work with CRLF line endings', () => {
-    const lines = splitText(`line 1\r\nline 2`)
-
-    expect(lines.length).toEqual(2)
-    expect(lines[0]).toEqual('line 1')
-    expect(lines[1]).toEqual('line 2')
-  })
-})
diff --git a/src/lint.ts b/src/lint.ts
deleted file mode 100644
index 8aba8df..0000000
--- a/src/lint.ts
+++ /dev/null
@@ -1,81 +0,0 @@
-import { readFile } from '@sasjs/utils/file'
-import { Diagnostic } from './types/Diagnostic'
-import { LintConfig } from './types/LintConfig'
-import { getLintConfig } from './utils/getLintConfig'
-
-/**
- * Analyses and produces a set of diagnostics for the given text content.
- * @param {string} text - the text content to be linted.
- * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
- */
-export const lintText = async (text: string) => {
-  const config = await getLintConfig()
-  return processText(text, config)
-}
-
-/**
- * Analyses and produces a set of diagnostics for the file at the given path.
- * @param {string} filePath - the path to the file to be linted.
- * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
- */
-export const lintFile = async (filePath: string) => {
-  const config = await getLintConfig()
-  const text = await readFile(filePath)
-
-  const fileDiagnostics = processFile(filePath, config)
-  const textDiagnostics = processText(text, config)
-
-  return [...fileDiagnostics, ...textDiagnostics]
-}
-
-/**
- * Splits the given content into a list of lines, regardless of CRLF or LF line endings.
- * @param {string} text - the text content to be split into lines.
- * @returns {string[]} an array of lines from the given text
- */
-export const splitText = (text: string): string[] => {
-  if (!text) return []
-  return text.replace(/\r\n/g, '\n').split('\n')
-}
-
-const processText = (text: string, config: LintConfig) => {
-  const lines = splitText(text)
-  const diagnostics: Diagnostic[] = []
-  diagnostics.push(...processContent(config, text))
-  lines.forEach((line, index) => {
-    diagnostics.push(...processLine(config, line, index + 1))
-  })
-
-  return diagnostics
-}
-
-const processContent = (config: LintConfig, content: string): Diagnostic[] => {
-  const diagnostics: Diagnostic[] = []
-  config.fileLintRules.forEach((rule) => {
-    diagnostics.push(...rule.test(content))
-  })
-
-  return diagnostics
-}
-
-const processLine = (
-  config: LintConfig,
-  line: string,
-  lineNumber: number
-): Diagnostic[] => {
-  const diagnostics: Diagnostic[] = []
-  config.lineLintRules.forEach((rule) => {
-    diagnostics.push(...rule.test(line, lineNumber, config))
-  })
-
-  return diagnostics
-}
-
-const processFile = (filePath: string, config: LintConfig): Diagnostic[] => {
-  const diagnostics: Diagnostic[] = []
-  config.pathLintRules.forEach((rule) => {
-    diagnostics.push(...rule.test(filePath))
-  })
-
-  return diagnostics
-}
diff --git a/src/lint/index.ts b/src/lint/index.ts
new file mode 100644
index 0000000..bf4ca25
--- /dev/null
+++ b/src/lint/index.ts
@@ -0,0 +1,4 @@
+export * from './lintText'
+export * from './lintFile'
+export * from './lintFolder'
+export * from './lintProject'
diff --git a/src/lint/lintFile.spec.ts b/src/lint/lintFile.spec.ts
new file mode 100644
index 0000000..a7de9ef
--- /dev/null
+++ b/src/lint/lintFile.spec.ts
@@ -0,0 +1,69 @@
+import { lintFile } from './lintFile'
+import { Severity } from '../types/Severity'
+import path from 'path'
+
+describe('lintFile', () => {
+  it('should identify lint issues in a given file', async () => {
+    const results = await lintFile(
+      path.join(__dirname, '..', 'Example File.sas')
+    )
+
+    expect(results.length).toEqual(8)
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 2,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains uppercase characters',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File missing Doxygen header',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains encoded password',
+      lineNumber: 5,
+      startColumnNumber: 10,
+      endColumnNumber: 18,
+      severity: Severity.Error
+    })
+    expect(results).toContainEqual({
+      message: 'Line is indented with a tab',
+      lineNumber: 7,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line has incorrect indentation - 3 spaces',
+      lineNumber: 6,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+  })
+})
diff --git a/src/lint/lintFile.ts b/src/lint/lintFile.ts
new file mode 100644
index 0000000..8d1bc6e
--- /dev/null
+++ b/src/lint/lintFile.ts
@@ -0,0 +1,23 @@
+import { readFile } from '@sasjs/utils/file'
+import { LintConfig } from '../types/LintConfig'
+import { getLintConfig } from '../utils/getLintConfig'
+import { processFile, processText } from './shared'
+
+/**
+ * Analyses and produces a set of diagnostics for the file at the given path.
+ * @param {string} filePath - the path to the file to be linted.
+ * @param {LintConfig} configuration - an optional configuration. When not passed in, this is read from the .sasjslint file.
+ * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
+ */
+export const lintFile = async (
+  filePath: string,
+  configuration?: LintConfig
+) => {
+  const config = configuration || (await getLintConfig())
+  const text = await readFile(filePath)
+
+  const fileDiagnostics = processFile(filePath, config)
+  const textDiagnostics = processText(text, config)
+
+  return [...fileDiagnostics, ...textDiagnostics]
+}
diff --git a/src/lint/lintFolder.spec.ts b/src/lint/lintFolder.spec.ts
new file mode 100644
index 0000000..f33ee7d
--- /dev/null
+++ b/src/lint/lintFolder.spec.ts
@@ -0,0 +1,67 @@
+import { lintFolder } from './lintFolder'
+import { Severity } from '../types/Severity'
+import path from 'path'
+
+describe('lintFolder', () => {
+  it('should identify lint issues in a given folder', async () => {
+    const results = await lintFolder(path.join(__dirname, '..'))
+
+    expect(results.length).toEqual(8)
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 2,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains uppercase characters',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File missing Doxygen header',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains encoded password',
+      lineNumber: 5,
+      startColumnNumber: 10,
+      endColumnNumber: 18,
+      severity: Severity.Error
+    })
+    expect(results).toContainEqual({
+      message: 'Line is indented with a tab',
+      lineNumber: 7,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line has incorrect indentation - 3 spaces',
+      lineNumber: 6,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+  })
+})
diff --git a/src/lint/lintFolder.ts b/src/lint/lintFolder.ts
new file mode 100644
index 0000000..7a2c164
--- /dev/null
+++ b/src/lint/lintFolder.ts
@@ -0,0 +1,49 @@
+import { listSubFoldersInFolder } from '@sasjs/utils/file'
+import path from 'path'
+import { Diagnostic } from '../types/Diagnostic'
+import { LintConfig } from '../types/LintConfig'
+import { asyncForEach } from '../utils/asyncForEach'
+import { getLintConfig } from '../utils/getLintConfig'
+import { listSasFiles } from '../utils/listSasFiles'
+import { lintFile } from './lintFile'
+
+const excludeFolders = [
+  '.git',
+  '.github',
+  '.vscode',
+  'node_modules',
+  'sasjsbuild',
+  'sasjsresults'
+]
+
+/**
+ * Analyses and produces a set of diagnostics for the folder at the given path.
+ * @param {string} folderPath - the path to the folder to be linted.
+ * @param {LintConfig} configuration - an optional configuration. When not passed in, this is read from the .sasjslint file.
+ * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
+ */
+export const lintFolder = async (
+  folderPath: string,
+  configuration?: LintConfig
+) => {
+  const config = configuration || (await getLintConfig())
+  const diagnostics: Diagnostic[] = []
+  const fileNames = await listSasFiles(folderPath)
+  await asyncForEach(fileNames, async (fileName) => {
+    diagnostics.push(
+      ...(await lintFile(path.join(folderPath, fileName), config))
+    )
+  })
+
+  const subFolders = (await listSubFoldersInFolder(folderPath)).filter(
+    (f: string) => !excludeFolders.includes(f)
+  )
+
+  await asyncForEach(subFolders, async (subFolder) => {
+    diagnostics.push(
+      ...(await lintFolder(path.join(folderPath, subFolder), config))
+    )
+  })
+
+  return diagnostics
+}
diff --git a/src/lint/lintProject.spec.ts b/src/lint/lintProject.spec.ts
new file mode 100644
index 0000000..635bf17
--- /dev/null
+++ b/src/lint/lintProject.spec.ts
@@ -0,0 +1,67 @@
+import { lintProject } from './lintProject'
+import { Severity } from '../types/Severity'
+import path from 'path'
+
+describe('lintProject', () => {
+  it('should identify lint issues in a given project', async () => {
+    const results = await lintProject()
+
+    expect(results.length).toEqual(8)
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 2,
+      startColumnNumber: 1,
+      endColumnNumber: 2,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains spaces',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File name contains uppercase characters',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'File missing Doxygen header',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line contains encoded password',
+      lineNumber: 5,
+      startColumnNumber: 10,
+      endColumnNumber: 18,
+      severity: Severity.Error
+    })
+    expect(results).toContainEqual({
+      message: 'Line is indented with a tab',
+      lineNumber: 7,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+    expect(results).toContainEqual({
+      message: 'Line has incorrect indentation - 3 spaces',
+      lineNumber: 6,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+  })
+})
diff --git a/src/lint/lintProject.ts b/src/lint/lintProject.ts
new file mode 100644
index 0000000..9712ee9
--- /dev/null
+++ b/src/lint/lintProject.ts
@@ -0,0 +1,16 @@
+import { getProjectRoot } from '../utils'
+import { lintFolder } from './lintFolder'
+
+/**
+ * Analyses and produces a set of diagnostics for the current project.
+ * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
+ */
+export const lintProject = async () => {
+  const projectRoot =
+    (await getProjectRoot()) || process.projectDir || process.currentDir
+
+  if (!projectRoot) {
+    throw new Error('SASjs Project Root was not found.')
+  }
+  return await lintFolder(projectRoot)
+}
diff --git a/src/lint/lintText.spec.ts b/src/lint/lintText.spec.ts
new file mode 100644
index 0000000..05de991
--- /dev/null
+++ b/src/lint/lintText.spec.ts
@@ -0,0 +1,69 @@
+import { lintText } from './lintText'
+import { Severity } from '../types/Severity'
+
+describe('lintText', () => {
+  it('should identify trailing spaces', async () => {
+    const text = `/**
+      @file
+    **/
+    %put 'hello'; 
+        %put 'world';  `
+    const results = await lintText(text)
+
+    expect(results.length).toEqual(2)
+    expect(results[0]).toEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 4,
+      startColumnNumber: 18,
+      endColumnNumber: 18,
+      severity: Severity.Warning
+    })
+    expect(results[1]).toEqual({
+      message: 'Line contains trailing spaces',
+      lineNumber: 5,
+      startColumnNumber: 22,
+      endColumnNumber: 23,
+      severity: Severity.Warning
+    })
+  })
+
+  it('should identify encoded passwords', async () => {
+    const text = `/**
+      @file
+    **/
+    %put '{SAS001}';`
+    const results = await lintText(text)
+
+    expect(results.length).toEqual(1)
+    expect(results[0]).toEqual({
+      message: 'Line contains encoded password',
+      lineNumber: 4,
+      startColumnNumber: 11,
+      endColumnNumber: 19,
+      severity: Severity.Error
+    })
+  })
+
+  it('should identify missing doxygen header', async () => {
+    const text = `%put 'hello';`
+    const results = await lintText(text)
+
+    expect(results.length).toEqual(1)
+    expect(results[0]).toEqual({
+      message: 'File missing Doxygen header',
+      lineNumber: 1,
+      startColumnNumber: 1,
+      endColumnNumber: 1,
+      severity: Severity.Warning
+    })
+  })
+
+  it('should return an empty list with an empty file', async () => {
+    const text = `/**
+      @file
+    **/`
+    const results = await lintText(text)
+
+    expect(results.length).toEqual(0)
+  })
+})
diff --git a/src/lint/lintText.ts b/src/lint/lintText.ts
new file mode 100644
index 0000000..f3b1b78
--- /dev/null
+++ b/src/lint/lintText.ts
@@ -0,0 +1,12 @@
+import { getLintConfig } from '../utils/getLintConfig'
+import { processText } from './shared'
+
+/**
+ * Analyses and produces a set of diagnostics for the given text content.
+ * @param {string} text - the text content to be linted.
+ * @returns {Diagnostic[]} array of diagnostic objects, each containing a warning, line number and column number.
+ */
+export const lintText = async (text: string) => {
+  const config = await getLintConfig()
+  return processText(text, config)
+}
diff --git a/src/lint/shared.spec.ts b/src/lint/shared.spec.ts
new file mode 100644
index 0000000..668610b
--- /dev/null
+++ b/src/lint/shared.spec.ts
@@ -0,0 +1,25 @@
+import { splitText } from './shared'
+
+describe('splitText', () => {
+  it('should return an empty array when text is falsy', () => {
+    const lines = splitText('')
+
+    expect(lines.length).toEqual(0)
+  })
+
+  it('should return an array of lines from text', () => {
+    const lines = splitText(`line 1\nline 2`)
+
+    expect(lines.length).toEqual(2)
+    expect(lines[0]).toEqual('line 1')
+    expect(lines[1]).toEqual('line 2')
+  })
+
+  it('should work with CRLF line endings', () => {
+    const lines = splitText(`line 1\r\nline 2`)
+
+    expect(lines.length).toEqual(2)
+    expect(lines[0]).toEqual('line 1')
+    expect(lines[1]).toEqual('line 2')
+  })
+})
diff --git a/src/lint/shared.ts b/src/lint/shared.ts
new file mode 100644
index 0000000..bbbadc6
--- /dev/null
+++ b/src/lint/shared.ts
@@ -0,0 +1,56 @@
+import { LintConfig, Diagnostic } from '../types'
+
+/**
+ * Splits the given content into a list of lines, regardless of CRLF or LF line endings.
+ * @param {string} text - the text content to be split into lines.
+ * @returns {string[]} an array of lines from the given text
+ */
+export const splitText = (text: string): string[] => {
+  if (!text) return []
+  return text.replace(/\r\n/g, '\n').split('\n')
+}
+
+export const processText = (text: string, config: LintConfig) => {
+  const lines = splitText(text)
+  const diagnostics: Diagnostic[] = []
+  diagnostics.push(...processContent(config, text))
+  lines.forEach((line, index) => {
+    diagnostics.push(...processLine(config, line, index + 1))
+  })
+
+  return diagnostics
+}
+
+export const processFile = (
+  filePath: string,
+  config: LintConfig
+): Diagnostic[] => {
+  const diagnostics: Diagnostic[] = []
+  config.pathLintRules.forEach((rule) => {
+    diagnostics.push(...rule.test(filePath))
+  })
+
+  return diagnostics
+}
+
+const processContent = (config: LintConfig, content: string): Diagnostic[] => {
+  const diagnostics: Diagnostic[] = []
+  config.fileLintRules.forEach((rule) => {
+    diagnostics.push(...rule.test(content))
+  })
+
+  return diagnostics
+}
+
+export const processLine = (
+  config: LintConfig,
+  line: string,
+  lineNumber: number
+): Diagnostic[] => {
+  const diagnostics: Diagnostic[] = []
+  config.lineLintRules.forEach((rule) => {
+    diagnostics.push(...rule.test(line, lineNumber, config))
+  })
+
+  return diagnostics
+}
diff --git a/src/rules/indentationMultiple.ts b/src/rules/indentationMultiple.ts
index b0a3874..0517ddf 100644
--- a/src/rules/indentationMultiple.ts
+++ b/src/rules/indentationMultiple.ts
@@ -11,7 +11,7 @@ const test = (value: string, lineNumber: number, config?: LintConfig) => {
 
   const indentationMultiple = isNaN(config?.indentationMultiple as number)
     ? 2
-    : config?.indentationMultiple
+    : config!.indentationMultiple
 
   if (indentationMultiple === 0) return []
   const numberOfSpaces = value.search(/\S|$/)
diff --git a/src/types/Process.d.ts b/src/types/Process.d.ts
new file mode 100644
index 0000000..67bd790
--- /dev/null
+++ b/src/types/Process.d.ts
@@ -0,0 +1,6 @@
+declare namespace NodeJS {
+  export interface Process {
+    projectDir: string
+    currentDir: string
+  }
+}
diff --git a/src/utils/asyncForEach.spec.ts b/src/utils/asyncForEach.spec.ts
new file mode 100644
index 0000000..fe27cdd
--- /dev/null
+++ b/src/utils/asyncForEach.spec.ts
@@ -0,0 +1,15 @@
+import { asyncForEach } from './asyncForEach'
+
+describe('asyncForEach', () => {
+  it('should execute the async callback for each item in the given array', async () => {
+    const callback = jest.fn().mockImplementation(() => Promise.resolve())
+    const array = [1, 2, 3]
+
+    await asyncForEach(array, callback)
+
+    expect(callback.mock.calls.length).toEqual(3)
+    expect(callback.mock.calls[0]).toEqual([1, 0, array])
+    expect(callback.mock.calls[1]).toEqual([2, 1, array])
+    expect(callback.mock.calls[2]).toEqual([3, 2, array])
+  })
+})
diff --git a/src/utils/asyncForEach.ts b/src/utils/asyncForEach.ts
new file mode 100644
index 0000000..744052b
--- /dev/null
+++ b/src/utils/asyncForEach.ts
@@ -0,0 +1,8 @@
+export async function asyncForEach(
+  array: any[],
+  callback: (item: any, index: number, originalArray: any[]) => any
+) {
+  for (let index = 0; index < array.length; index++) {
+    await callback(array[index], index, array)
+  }
+}
diff --git a/src/utils/getLintConfig.ts b/src/utils/getLintConfig.ts
index 032fbf0..c90b15d 100644
--- a/src/utils/getLintConfig.ts
+++ b/src/utils/getLintConfig.ts
@@ -27,6 +27,7 @@ export async function getLintConfig(): Promise<LintConfig> {
   const configuration = await readFile(
     path.join(projectRoot, '.sasjslint')
   ).catch((_) => {
+    console.warn('Unable to load .sasjslint file. Using default configuration.')
     return JSON.stringify(DefaultLintConfiguration)
   })
   return new LintConfig(JSON.parse(configuration))
diff --git a/src/utils/index.ts b/src/utils/index.ts
index 4bb8061..f48b820 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -1,2 +1,3 @@
 export * from './getLintConfig'
 export * from './getProjectRoot'
+export * from './listSasFiles'
diff --git a/src/utils/listSasFiles.ts b/src/utils/listSasFiles.ts
new file mode 100644
index 0000000..47899d6
--- /dev/null
+++ b/src/utils/listSasFiles.ts
@@ -0,0 +1,6 @@
+import { listFilesInFolder } from '@sasjs/utils/file'
+
+export const listSasFiles = async (folderPath: string): Promise<string[]> => {
+  const files = await listFilesInFolder(folderPath)
+  return files.filter((f) => f.endsWith('.sas'))
+}