feat(python): add poetry support (#188)

* feat(python): add poetry support

* chore: run autoformatter

---------

Co-authored-by: Timothy Jones <timothy.l.jones@gmail.com>

README.md

@@ -24,6 +24,7 @@ _Having problems? Want to contribute? Join us on the [node-tooling community Sla
     - [.NET Support](#net-support)
     - [YAML Support](#yaml-support)
     - [OpenAPI Support](#openapi-support)
+    - [Python Support](#python-support)
   - [Installing `commit-and-tag-version`](#installing-commit-and-tag-version)
     - [As a local `npm run` script](#as-a-local-npm-run-script)
     - [As global `bin`](#as-global-bin)
@@ -127,6 +128,14 @@ If you are using OpenAPI, then just point to your `openapi.yaml` file.
 commit-and-tag-version --packageFiles openapi.yaml --bumpFiles openapi.yaml
 ```
 
+### Python Support
+
+If you are using Python ***with Poetry***, then point to your `pyproject.toml` file.
+
+```sh
+commit-and-tag-version --packageFiles pyproject.toml --bumpFiles pyproject.toml
+```
+
 ## Installing `commit-and-tag-version`
 
 ### As a local `npm run` script

lib/updaters/index.js

@@ -8,6 +8,7 @@ const updatersByType = {
   csproj: require('./types/csproj'),
   yaml: require('./types/yaml'),
   openapi: require('./types/openapi'),
+  python: require('./types/python'),
 };
 const PLAIN_TEXT_BUMP_FILES = ['VERSION.txt', 'version.txt'];
 
@@ -41,6 +42,9 @@ function getUpdaterByFilename(filename) {
   if (/\.ya?ml$/.test(filename)) {
     return getUpdaterByType('yaml');
   }
+  if (/pyproject.toml/.test(filename)) {
+    return getUpdaterByType('python');
+  }
   throw Error(
     `Unsupported file (${filename}) provided for bumping.\n Please specify the updater \`type\` or use a custom \`updater\`.`,
   );

lib/updaters/types/python.js

@@ -0,0 +1,30 @@
+const versionExtractRegex = /version[" ]*=[ ]*["'](.*)["']/i;
+
+const getVersionIndex = function (lines) {
+  let version;
+  const lineNumber = lines.findIndex((line) => {
+    const versionMatcher = line.match(versionExtractRegex);
+    // if version not found in lines provided, return false
+    if (versionMatcher == null) {
+      return false;
+    }
+    version = versionMatcher[1];
+    return true;
+  });
+  return { version, lineNumber };
+};
+
+module.exports.readVersion = function (contents) {
+  const lines = contents.split('\n');
+  const versionIndex = getVersionIndex(lines);
+  return versionIndex.version;
+};
+
+module.exports.writeVersion = function (contents, version) {
+  const lines = contents.split('\n');
+  const versionIndex = getVersionIndex(lines);
+  const versionLine = lines[versionIndex.lineNumber];
+  const newVersionLine = versionLine.replace(versionIndex.version, version);
+  lines[versionIndex.lineNumber] = newVersionLine;
+  return lines.join('\n');
+};

test/core.spec.js

@@ -1130,6 +1130,42 @@ describe('cli', function () {
           console.warn = origWarn;
         }
       });
+
+      it('bumps version in Python `pyproject.toml` file', async function () {
+        const expected = fs.readFileSync(
+          './test/mocks/pyproject-1.1.0.toml',
+          'utf-8',
+        );
+
+        const filename = 'python.toml';
+        mock({
+          bump: 'minor',
+          realTestFiles: [
+            {
+              filename,
+              path: './test/mocks/pyproject-1.0.0.toml',
+            },
+          ],
+        });
+
+        await exec({
+          packageFiles: [{ filename, type: 'python' }],
+          bumpFiles: [{ filename, type: 'python' }],
+        });
+
+        // filePath is the first arg passed to writeFileSync
+        const packageJsonWriteFileSynchCall = findWriteFileCallForPath({
+          writeFileSyncSpy,
+          filename,
+        });
+
+        if (!packageJsonWriteFileSynchCall) {
+          throw new Error(`writeFileSynch not invoked with path ${filename}`);
+        }
+
+        const calledWithContentStr = packageJsonWriteFileSynchCall[1];
+        expect(calledWithContentStr).toEqual(expected);
+      });
     });
 
     it('`packageFiles` are bumped along with `bumpFiles` defaults [commit-and-tag-version#533]', async function () {

test/mocks/pyproject-1.0.0.toml

@@ -0,0 +1,12 @@
+[tool.poetry]
+name = "test"
+version = "1.0.0"
+description = ""
+authors = []
+
+[tool.poetry.dependencies]
+python = "^3.8"
+
+[build-system]
+requires = ["poetry>=1"]
+build-backend = "poetry.masonry.api"

test/mocks/pyproject-1.1.0.toml

@@ -0,0 +1,12 @@
+[tool.poetry]
+name = "test"
+version = "1.1.0"
+description = ""
+authors = []
+
+[tool.poetry.dependencies]
+python = "^3.8"
+
+[build-system]
+requires = ["poetry>=1"]
+build-backend = "poetry.masonry.api"