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135 lines
5.5 KiB
Markdown
135 lines
5.5 KiB
Markdown
# Contributing
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## Discuss Significant Changes
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Before you invest a significant amount of time on a change, please create a discussion or issue describing your
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proposal. This will help to ensure your proposed change has a reasonable chance of being merged.
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## Avoid Dependencies
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Adding a dependency is a big deal. While on occasion a new dependency may be accepted, the default answer to any change
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that adds a dependency is no.
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## Development Environment Setup
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pgx tests naturally require a PostgreSQL database. It will connect to the database specified in the `PGX_TEST_DATABASE`
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environment variable. The `PGX_TEST_DATABASE` environment variable can either be a URL or key-value pairs. In addition,
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the standard `PG*` environment variables will be respected. Consider using [direnv](https://github.com/direnv/direnv) to
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simplify environment variable handling.
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### Using an Existing PostgreSQL Cluster
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If you already have a PostgreSQL development server this is the quickest way to start and run the majority of the pgx
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test suite. Some tests will be skipped that require server configuration changes (e.g. those testing different
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authentication methods).
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Create and setup a test database:
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```
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export PGDATABASE=pgx_test
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createdb
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psql -c 'create extension hstore;'
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psql -c 'create domain uint64 as numeric(20,0);'
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```
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Ensure a `postgres` user exists. This happens by default in normal PostgreSQL installs, but some installation methods
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such as Homebrew do not.
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```
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createuser -s postgres
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```
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Ensure your `PGX_TEST_DATABASE` environment variable points to the database you just created and run the tests.
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```
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export PGX_TEST_DATABASE="host=/private/tmp database=pgx_test"
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go test ./...
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```
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This will run the vast majority of the tests, but some tests will be skipped (e.g. those testing different connection methods).
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### Creating a New PostgreSQL Cluster Exclusively for Testing
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The following environment variables need to be set both for initial setup and whenever the tests are run. (direnv is
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highly recommended). Depending on your platform, you may need to change the host for `PGX_TEST_UNIX_SOCKET_CONN_STRING`.
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```
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export PGPORT=5015
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export PGUSER=postgres
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export PGDATABASE=pgx_test
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export POSTGRESQL_DATA_DIR=postgresql
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export PGX_TEST_DATABASE="host=127.0.0.1 database=pgx_test user=pgx_md5 password=secret"
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export PGX_TEST_UNIX_SOCKET_CONN_STRING="host=/private/tmp database=pgx_test"
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export PGX_TEST_TCP_CONN_STRING="host=127.0.0.1 database=pgx_test user=pgx_md5 password=secret"
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export PGX_TEST_SCRAM_PASSWORD_CONN_STRING="host=127.0.0.1 user=pgx_scram password=secret database=pgx_test"
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export PGX_TEST_MD5_PASSWORD_CONN_STRING="host=127.0.0.1 database=pgx_test user=pgx_md5 password=secret"
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export PGX_TEST_PLAIN_PASSWORD_CONN_STRING="host=127.0.0.1 user=pgx_pw password=secret"
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export PGX_TEST_TLS_CONN_STRING="host=localhost user=pgx_ssl password=secret sslmode=verify-full sslrootcert=`pwd`/.testdb/ca.pem"
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export PGX_SSL_PASSWORD=certpw
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export PGX_TEST_TLS_CLIENT_CONN_STRING="host=localhost user=pgx_sslcert sslmode=verify-full sslrootcert=`pwd`/.testdb/ca.pem database=pgx_test sslcert=`pwd`/.testdb/pgx_sslcert.crt sslkey=`pwd`/.testdb/pgx_sslcert.key"
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```
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Create a new database cluster.
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```
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initdb --locale=en_US -E UTF-8 --username=postgres .testdb/$POSTGRESQL_DATA_DIR
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echo "listen_addresses = '127.0.0.1'" >> .testdb/$POSTGRESQL_DATA_DIR/postgresql.conf
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echo "port = $PGPORT" >> .testdb/$POSTGRESQL_DATA_DIR/postgresql.conf
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cat testsetup/postgresql_ssl.conf >> .testdb/$POSTGRESQL_DATA_DIR/postgresql.conf
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cp testsetup/pg_hba.conf .testdb/$POSTGRESQL_DATA_DIR/pg_hba.conf
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cp testsetup/ca.cnf .testdb
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cp testsetup/localhost.cnf .testdb
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cp testsetup/pgx_sslcert.cnf .testdb
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cd .testdb
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# Generate a CA public / private key pair.
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openssl genrsa -out ca.key 4096
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openssl req -x509 -config ca.cnf -new -nodes -key ca.key -sha256 -days 365 -subj '/O=pgx-test-root' -out ca.pem
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# Generate the certificate for localhost (the server).
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openssl genrsa -out localhost.key 2048
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openssl req -new -config localhost.cnf -key localhost.key -out localhost.csr
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openssl x509 -req -in localhost.csr -CA ca.pem -CAkey ca.key -CAcreateserial -out localhost.crt -days 364 -sha256 -extfile localhost.cnf -extensions v3_req
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# Copy certificates to server directory and set permissions.
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cp ca.pem $POSTGRESQL_DATA_DIR/root.crt
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cp localhost.key $POSTGRESQL_DATA_DIR/server.key
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chmod 600 $POSTGRESQL_DATA_DIR/server.key
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cp localhost.crt $POSTGRESQL_DATA_DIR/server.crt
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# Generate the certificate for client authentication.
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openssl genrsa -des3 -out pgx_sslcert.key -passout pass:certpw 2048
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openssl req -new -config pgx_sslcert.cnf -key pgx_sslcert.key -passin pass:certpw -out pgx_sslcert.csr
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openssl x509 -req -in pgx_sslcert.csr -CA ca.pem -CAkey ca.key -CAcreateserial -out pgx_sslcert.crt -days 363 -sha256 -extfile pgx_sslcert.cnf -extensions v3_req
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cd ..
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```
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Start the new cluster. This will be necessary whenever you are running pgx tests.
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```
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postgres -D .testdb/$POSTGRESQL_DATA_DIR
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```
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Setup the test database in the new cluster.
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```
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createdb
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psql --no-psqlrc -f testsetup/postgresql_setup.sql
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```
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### PgBouncer
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There are tests specific for PgBouncer that will be executed if `PGX_TEST_PGBOUNCER_CONN_STRING` is set.
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### Optional Tests
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pgx supports multiple connection types and means of authentication. These tests are optional. They will only run if the
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appropriate environment variables are set. In addition, there may be tests specific to particular PostgreSQL versions,
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non-PostgreSQL servers (e.g. CockroachDB), or connection poolers (e.g. PgBouncer). `go test ./... -v | grep SKIP` to see
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if any tests are being skipped.
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