feat(python): allow installing a version from git directly (#11)

Author: rubenfonseca

layer/Python/Dockerfile

@@ -6,8 +6,10 @@ USER root
 WORKDIR /tmp
 
 # PACKAGE_SUFFIX = '[all]==2.0.0'
+# PACKAGE_SUFFIX = '[all] @ git+https://github.com/awslabs/aws-lambda-powertools-python@v2'
 # PACKAGE_SUFFIX = '[all]'
 # PACKAGE_SUFFIX = '=='2.0.0'
+# PACKAGE_SUFFIX = ' @ git+https://github.com/awslabs/aws-lambda-powertools-python@v2'
 # PACKAGE_SUFFIX = ''
 
 RUN yum update -y && yum install -y zip unzip wget tar gzip binutils
@@ -29,7 +31,7 @@ RUN yum install -y \
 # Install cython to generate native code
 RUN pip install --upgrade pip wheel && pip install --upgrade cython
 # Optimize binary size and strip debugging symbols for optimum size
-RUN CFLAGS="-Os -g0 -s" pip install --no-binary pydantic -t /asset/python aws-lambda-powertools$PACKAGE_SUFFIX
+RUN CFLAGS="-Os -g0 -s" pip install --no-binary pydantic -t /asset/python "aws-lambda-powertools$PACKAGE_SUFFIX"
 
 # Removing nonessential files
 RUN cd /asset && \

src/lambda-powertools-layer.ts

@@ -58,7 +58,11 @@ export class LambdaPowertoolsLayer extends lambda.LayerVersion {
           suffix = '[all]';
         }
         if (version) {
-          suffix = `${suffix}==${version}`;
+          if (version.startsWith('git')) {
+            suffix = `${suffix} @ ${version}`;
+          } else {
+            suffix = `${suffix}==${version}`;
+          }
         }
         break;
       case lambda.RuntimeFamily.NODEJS:

test/lambda-powertools-python-layer.test.ts

@@ -117,6 +117,13 @@ describe('construct build args for Dockerfile', () => {
     expect(args).toEqual('[all]');
   });
 
+  test('returns a git url with extras when a git url is provided', () => {
+    const version = 'git+https://github.com/awslabs/aws-lambda-powertools-python@v2';
+    const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.PYTHON, true, version);
+
+    expect(args).toEqual(`[all] @ ${version}`);
+  });
+
   test('returns only version when no extras flag provided', () => {
     const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.PYTHON, undefined, '1.11.0');
 
@@ -129,4 +136,11 @@ describe('construct build args for Dockerfile', () => {
     expect(args).toEqual('');
   });
 
+  test('returns a git url when a git url is provided and extras provided', () => {
+    const version = 'git+https://github.com/awslabs/aws-lambda-powertools-python@v2';
+    const args = LambdaPowertoolsLayer.constructBuildArgs(RuntimeFamily.PYTHON, false, version);
+
+    expect(args).toEqual(` @ ${version}`);
+  });
+
 });