Use CLI flags in addition to env vars for config

Signed-off-by: William Brawner <me@wbrawner.com>

.gitignore

@@ -1,31 +1,16 @@
-HELP.md
-/target/
-!.mvn/wrapper/maven-wrapper.jar
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+/twigs
 
-### STS ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
+# Test binary, built with `go test -c`
+*.test
 
-### IntelliJ IDEA ###
-.idea
-*.iws
-*.iml
-*.ipr
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
 
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-/build/
-
-### VS Code ###
+# VS Code
 .vscode/
-.gradle
-*.sql

README.md

@@ -4,15 +4,15 @@ This is the backend application that powers the [Android](../../../twigs-android
 
 ## Prerequisites
 
-- JDK 14 or newer
+- Go 1.16 or newer
 - PostgreSQL 13 or newer
 - (optional) Docker
 
 ## Running
 
-Prior to running the app, make sure you have a PostgreSQL server running, with a database and user ready to go. To avoid the hassle of figuring out how to get it installed locally, using Docker is recommended, and a sample `docker-compose.yml` file is included in the root of the repository. If you already have a PostgreSQL server running, you can run the app from the command line with gradle:
+Prior to running the app, make sure you have a PostgreSQL server running, with a database and user ready to go. To avoid the hassle of figuring out how to get it installed locally, using Docker is recommended, and a sample `docker-compose.yml` file is included in the root of the repository. If you already have a PostgreSQL server running, you can run the app from the command line:
 
-    ./gradlew run
+    go run twigs.go
 
 ## Configuration
 
@@ -30,7 +30,5 @@ Environment Variable|Default Value|Note
 
 ## Building
 
-Building the app is also handled with gradle:
-
-    ./gradlew shadowJar
+    go build
 

api/.gitignore

@@ -1 +0,0 @@
-build/

api/build.gradle.kts

@@ -1,22 +0,0 @@
-plugins {
-    kotlin("jvm")
-    kotlin("plugin.serialization") version "1.5.20"
-    `java-library`
-}
-
-val ktorVersion: String by rootProject.extra
-
-dependencies {
-    implementation(kotlin("stdlib"))
-    api(project(":core"))
-    implementation(project(":storage"))
-    api("io.ktor:ktor-server-core:$ktorVersion")
-    api("io.ktor:ktor-serialization:$ktorVersion")
-    api("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.5.2")
-    testImplementation("org.junit.jupiter:junit-jupiter-api:5.8.2")
-    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
-}
-
-tasks.getByName<Test>("test") {
-    useJUnitPlatform()
-}

build.gradle.kts

@@ -1,35 +0,0 @@
-import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
-import java.net.URI
-
-buildscript {
-    val kotlinVersion: String by extra("1.6.10")
-    val ktorVersion: String by extra("1.6.6")
-    repositories {
-        mavenLocal()
-        mavenCentral()
-    }
-
-    dependencies {
-        classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion")
-    }
-}
-
-plugins {
-    java
-    kotlin("jvm") version "1.5.20"
-}
-
-allprojects {
-    repositories {
-        mavenLocal()
-        mavenCentral()
-        maven {
-            url = URI("https://repo.maven.apache.org/maven2")
-        }
-    }
-    group = "com.wbrawner"
-    version = "0.0.1-SNAPSHOT"
-    tasks.withType<KotlinCompile> {
-        kotlinOptions.jvmTarget = "16"
-    }
-}

captain-definition

@@ -1,4 +0,0 @@
- {
-  "schemaVersion": 2,
-  "dockerfilePath": "./Dockerfile"
- }

cmd/twigs/main.go

@@ -0,0 +1,86 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+
+	"github.com/gorilla/mux"
+	_ "github.com/lib/pq"
+	"github.com/urfave/cli/v2"
+)
+
+const ARG_PORT = "port"
+const ARG_DB_NAME = "db-name"
+const ARG_DB_USER = "db-user"
+const ARG_DB_PASS = "db-pass"
+const ARG_DB_HOST = "db-host"
+const ARG_DB_PORT = "db-port"
+
+func main() {
+	app := &cli.App{
+		Name:  "twigs",
+		Usage: "personal/family finance app server",
+		Flags: []cli.Flag{
+			&cli.IntFlag{
+				Name:    ARG_PORT,
+				Value:   8080,
+				Usage:   "the `PORT` for the server to listen on",
+				Aliases: []string{"p"},
+				EnvVars: []string{"TWIGS_PORT"},
+			},
+			&cli.StringFlag{
+				Name:    ARG_DB_NAME,
+				Value:   "twigs",
+				Usage:   "the `NAME` of the database to connect to",
+				EnvVars: []string{"TWIGS_DB_NAME"},
+			},
+			&cli.StringFlag{
+				Name:    ARG_DB_USER,
+				Value:   "twigs",
+				Usage:   "the `USERNAME` to use to connect to the database",
+				EnvVars: []string{"TWIGS_DB_USER"},
+			},
+			&cli.StringFlag{
+				Name:    ARG_DB_PASS,
+				Value:   "twigs",
+				Usage:   "the `PASSWORD` to use to connect to the database",
+				EnvVars: []string{"TWIGS_DB_PASS"},
+			},
+			&cli.StringFlag{
+				Name:    ARG_DB_HOST,
+				Value:   "twigs",
+				Usage:   "the `HOST` to use to connect to the database",
+				EnvVars: []string{"TWIGS_DB_HOST"},
+			},
+			&cli.IntFlag{
+				Name:    ARG_DB_PORT,
+				Value:   5432,
+				Usage:   "the `PORT` to use to connect to the database",
+				EnvVars: []string{"TWIGS_DB_PORT"},
+			},
+		},
+		Action: func(c *cli.Context) error {
+			_, err := sql.Open("postgres", fmt.Sprintf(
+				"%s:%s@%s:%d/%s",
+				c.String(ARG_DB_USER),
+				c.String(ARG_DB_PASS),
+				c.String(ARG_DB_HOST),
+				c.Int(ARG_DB_PORT),
+				c.String(ARG_DB_NAME),
+			))
+			if err != nil {
+				log.Fatalf("Failed to connect to database %s on %s", c.String(ARG_DB_NAME), c.String(ARG_DB_HOST))
+			}
+			_ = mux.NewRouter()
+			log.Fatal(http.ListenAndServe(":8080", nil))
+			return nil
+		},
+	}
+	err := app.Run(os.Args)
+	if err != nil {
+		log.Fatal(err)
+	}
+}

go.mod

@@ -0,0 +1,9 @@
+module wbrawner.com/twigs
+
+go 1.16
+
+require (
+	github.com/gorilla/mux v1.8.0
+	github.com/lib/pq v1.10.6
+	github.com/urfave/cli/v2 v2.8.0
+)

go.sum

@@ -0,0 +1,17 @@
+github.com/BurntSushi/toml v1.1.0/go.mod h1:CxXYINrC8qIiEnFrOxCa7Jy5BFHlXnUU2pbicEuybxQ=
+github.com/antzucaro/matchr v0.0.0-20210222213004-b04723ef80f0 h1:R/qAiUxFT3mNgQaNqJe0IVznjKRNm23ohAIh9lgtlzc=
+github.com/antzucaro/matchr v0.0.0-20210222213004-b04723ef80f0/go.mod h1:v3ZDlfVAL1OrkKHbGSFFK60k0/7hruHPDq2XMs9Gu6U=
+github.com/cpuguy83/go-md2man/v2 v2.0.1 h1:r/myEWzV9lfsM1tFLgDyu0atFtJ1fXn261LKYj/3DxU=
+github.com/cpuguy83/go-md2man/v2 v2.0.1/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
+github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
+github.com/lib/pq v1.10.6 h1:jbk+ZieJ0D7EVGJYpL9QTz7/YW6UHbmdnZWYyK5cdBs=
+github.com/lib/pq v1.10.6/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+github.com/russross/blackfriday/v2 v2.1.0 h1:JIOH55/0cWyOuilr9/qlrm0BSXldqnqwMsf35Ld67mk=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/urfave/cli/v2 v2.8.0 h1:EZsAB20oRW4nHcB99TTL6PrXpBGIEujMEKdjwruY9KQ=
+github.com/urfave/cli/v2 v2.8.0/go.mod h1:TYFbtzt/azQoJOrGH5mDfZtS0jIkl/OeFwlRWPR9KRM=
+golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +0,0 @@
-#Fri Feb 07 18:11:46 CST 2020
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.1.1-all.zip
-distributionBase=GRADLE_USER_HOME
-distributionPath=wrapper/dists
-zipStorePath=wrapper/dists
-zipStoreBase=GRADLE_USER_HOME

gradlew

@@ -1,183 +0,0 @@
-#!/usr/bin/env sh
-
-#
-# Copyright 2015 the original author or authors.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      https://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-##############################################################################
-##
-##  Gradle start up script for UN*X
-##
-##############################################################################
-
-# Attempt to set APP_HOME
-# Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
-done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
-
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-
-# Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
-
-warn () {
-    echo "$*"
-}
-
-die () {
-    echo
-    echo "$*"
-    echo
-    exit 1
-}
-
-# OS specific support (must be 'true' or 'false').
-cygwin=false
-msys=false
-darwin=false
-nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
-esac
-
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
-
-# Determine the Java command to use to start the JVM.
-if [ -n "$JAVA_HOME" ] ; then
-    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
-        # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
-    else
-        JAVACMD="$JAVA_HOME/bin/java"
-    fi
-    if [ ! -x "$JAVACMD" ] ; then
-        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-    fi
-else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-
-Please set the JAVA_HOME variable in your environment to match the
-location of your Java installation."
-fi
-
-# Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=`expr $i + 1`
-    done
-    case $i in
-        0) set -- ;;
-        1) set -- "$args0" ;;
-        2) set -- "$args0" "$args1" ;;
-        3) set -- "$args0" "$args1" "$args2" ;;
-        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
-fi
-
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=`save "$@"`
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
-
-exec "$JAVACMD" "$@"

gradlew.bat

@@ -1,100 +0,0 @@
-@rem
-@rem Copyright 2015 the original author or authors.
-@rem
-@rem Licensed under the Apache License, Version 2.0 (the "License");
-@rem you may not use this file except in compliance with the License.
-@rem You may obtain a copy of the License at
-@rem
-@rem      https://www.apache.org/licenses/LICENSE-2.0
-@rem
-@rem Unless required by applicable law or agreed to in writing, software
-@rem distributed under the License is distributed on an "AS IS" BASIS,
-@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-@rem See the License for the specific language governing permissions and
-@rem limitations under the License.
-@rem
-
-@if "%DEBUG%" == "" @echo off
-@rem ##########################################################################
-@rem
-@rem  Gradle startup script for Windows
-@rem
-@rem ##########################################################################
-
-@rem Set local scope for the variables with windows NT shell
-if "%OS%"=="Windows_NT" setlocal
-
-set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
-set APP_BASE_NAME=%~n0
-set APP_HOME=%DIRNAME%
-
-@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
-
-@rem Find java.exe
-if defined JAVA_HOME goto findJavaFromJavaHome
-
-set JAVA_EXE=java.exe
-%JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
-
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:findJavaFromJavaHome
-set JAVA_HOME=%JAVA_HOME:"=%
-set JAVA_EXE=%JAVA_HOME%/bin/java.exe
-
-if exist "%JAVA_EXE%" goto init
-
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
-
-goto fail
-
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
-:execute
-@rem Setup the command line
-
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
-
-@rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
-
-:end
-@rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
-
-:fail
-rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
-rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
-
-:mainEnd
-if "%OS%"=="Windows_NT" endlocal
-
-:omega

settings.gradle.kts

@@ -1,3 +0,0 @@
-rootProject.name = "twigs"
-include("core", "api", "app", "storage", "db", "web")
-include("testhelpers")