move src out of srv, clean up default.nix and Makefile

4 files changed, 0 insertions, 405 deletions

diff --git a/srv/src/cfg/cfg.go b/srv/src/cfg/cfg.go
deleted file mode 100644
index d87c45b..0000000
--- a/srv/src/cfg/cfg.go
+++ /dev/null
@@ -1,255 +0,0 @@
-// Package cfg implements a simple wrapper around go's flag package, in order to
-// implement initialization hooks.
-package cfg
-
-import (
-	"context"
-	"flag"
-	"fmt"
-	"os"
-	"strconv"
-	"strings"
-)
-
-// Cfger is a component which can be used with Cfg to setup its initialization.
-type Cfger interface {
-	SetupCfg(*Cfg)
-}
-
-// Params are used to initialize a Cfg instance.
-type Params struct {
-
-	// Args are the command line arguments, excluding the command-name.
-	//
-	// Defaults to os.Args[1:]
-	Args []string
-
-	// Env is the process's environment variables.
-	//
-	// Defaults to the real environment variables.
-	Env map[string]string
-
-	// EnvPrefix indicates a string to prefix to all environment variable names
-	// that Cfg will read. Will be automatically suffixed with a "_" if given.
-	EnvPrefix string
-}
-
-func (p Params) withDefaults() Params {
-
-	if p.Args == nil {
-		p.Args = os.Args[1:]
-	}
-
-	if p.Env == nil {
-
-		p.Env = map[string]string{}
-
-		for _, envVar := range os.Environ() {
-
-			parts := strings.SplitN(envVar, "=", 2)
-
-			if len(parts) < 2 {
-				panic(fmt.Sprintf("envVar %q returned from os.Environ() somehow", envVar))
-			}
-
-			p.Env[parts[0]] = parts[1]
-		}
-	}
-
-	if p.EnvPrefix != "" {
-		p.EnvPrefix = strings.TrimSuffix(p.EnvPrefix, "_") + "_"
-	}
-
-	return p
-}
-
-// Cfg is a wrapper around the stdlib's FlagSet and a set of initialization
-// hooks.
-type Cfg struct {
-	params  Params
-	flagSet *flag.FlagSet
-
-	hooks []func(ctx context.Context) error
-}
-
-// New initializes and returns a new instance of *Cfg.
-func New(params Params) *Cfg {
-
-	params = params.withDefaults()
-
-	return &Cfg{
-		params:  params,
-		flagSet: flag.NewFlagSet("", flag.ExitOnError),
-	}
-}
-
-// OnInit appends the given callback to the sequence of hooks which will run on
-// a call to Init.
-func (c *Cfg) OnInit(cb func(context.Context) error) {
-	c.hooks = append(c.hooks, cb)
-}
-
-// Init runs all hooks registered using OnInit, in the same order OnInit was
-// called. If one returns an error that error is returned and no further hooks
-// are run.
-func (c *Cfg) Init(ctx context.Context) error {
-	if err := c.flagSet.Parse(c.params.Args); err != nil {
-		return err
-	}
-
-	for _, h := range c.hooks {
-		if err := h(ctx); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *Cfg) envifyName(name string) string {
-	name = c.params.EnvPrefix + name
-	name = strings.Replace(name, "-", "_", -1)
-	name = strings.ToUpper(name)
-	return name
-}
-
-func envifyUsage(envName, usage string) string {
-	return fmt.Sprintf("%s (overrides %s)", usage, envName)
-}
-
-// StringVar is equivalent to flag.FlagSet's StringVar method, but will
-// additionally set up an environment variable for the parameter.
-func (c *Cfg) StringVar(p *string, name, value, usage string) {
-
-	envName := c.envifyName(name)
-
-	c.flagSet.StringVar(p, name, value, envifyUsage(envName, usage))
-
-	if val := c.params.Env[envName]; val != "" {
-		*p = val
-	}
-}
-
-// Args returns a pointer which will be filled with the process's positional
-// arguments after Init is called. The positional arguments are all CLI
-// arguments starting with the first non-flag argument.
-//
-// The usage argument should describe what these arguments are, and its notation
-// should indicate if they are optional or variadic. For example:
-//
-//	// optional variadic
-//	"[names...]"
-//
-//	// required single args
-//	"<something> <something else>"
-//
-//	// Mixed
-//	"<foo> <bar> [baz] [other...]"
-//
-func (c *Cfg) Args(usage string) *[]string {
-
-	args := new([]string)
-
-	c.flagSet.Usage = func() {
-		fmt.Fprintf(os.Stderr, "USAGE [flags...] %s\n", usage)
-		fmt.Fprintf(os.Stderr, "\nFLAGS\n\n")
-		c.flagSet.PrintDefaults()
-	}
-
-	c.OnInit(func(ctx context.Context) error {
-		*args = c.flagSet.Args()
-		return nil
-	})
-
-	return args
-}
-
-// String is equivalent to flag.FlagSet's String method, but will additionally
-// set up an environment variable for the parameter.
-func (c *Cfg) String(name, value, usage string) *string {
-	p := new(string)
-	c.StringVar(p, name, value, usage)
-	return p
-}
-
-// IntVar is equivalent to flag.FlagSet's IntVar method, but will additionally
-// set up an environment variable for the parameter.
-func (c *Cfg) IntVar(p *int, name string, value int, usage string) {
-
-	envName := c.envifyName(name)
-
-	c.flagSet.IntVar(p, name, value, envifyUsage(envName, usage))
-
-	// if we can't parse the envvar now then just hold onto the error until
-	// Init, otherwise we'd have to panic here and that'd be ugly.
-	var err error
-
-	if valStr := c.params.Env[envName]; valStr != "" {
-
-		var val int
-		val, err = strconv.Atoi(valStr)
-
-		if err != nil {
-			err = fmt.Errorf(
-				"parsing envvar %q with value %q: %w",
-				envName, valStr, err,
-			)
-
-		} else {
-			*p = val
-		}
-	}
-
-	c.OnInit(func(context.Context) error { return err })
-}
-
-// Int is equivalent to flag.FlagSet's Int method, but will additionally set up
-// an environment variable for the parameter.
-func (c *Cfg) Int(name string, value int, usage string) *int {
-	p := new(int)
-	c.IntVar(p, name, value, usage)
-	return p
-}
-
-// BoolVar is equivalent to flag.FlagSet's BoolVar method, but will additionally
-// set up an environment variable for the parameter.
-func (c *Cfg) BoolVar(p *bool, name string, value bool, usage string) {
-
-	envName := c.envifyName(name)
-
-	c.flagSet.BoolVar(p, name, value, envifyUsage(envName, usage))
-
-	if valStr := c.params.Env[envName]; valStr != "" {
-		*p = valStr != "" && valStr != "0" && valStr != "false"
-	}
-}
-
-// Bool is equivalent to flag.FlagSet's Bool method, but will additionally set
-// up an environment variable for the parameter.
-func (c *Cfg) Bool(name string, value bool, usage string) *bool {
-	p := new(bool)
-	c.BoolVar(p, name, value, usage)
-	return p
-}
-
-// SubCmd should be called _after_ Init. Init will have consumed all arguments
-// up until the first non-flag argument. This non-flag argument is a
-// sub-command, and is returned by this method. This method also resets Cfg's
-// internal state so that new options can be added to it.
-//
-// If there is no sub-command following the initial set of flags then this will
-// return empty string.
-func (c *Cfg) SubCmd() string {
-	c.params.Args = c.flagSet.Args()
-	if len(c.params.Args) == 0 {
-		return ""
-	}
-
-	subCmd := c.params.Args[0]
-
-	c.flagSet = flag.NewFlagSet(subCmd, flag.ExitOnError)
-	c.hooks = nil
-	c.params.Args = c.params.Args[1:]
-
-	return subCmd
-}
diff --git a/srv/src/cfg/cfg_test.go b/srv/src/cfg/cfg_test.go
deleted file mode 100644
index 8266c89..0000000
--- a/srv/src/cfg/cfg_test.go
+++ /dev/null
@@ -1,67 +0,0 @@
-package cfg
-
-import (
-	"context"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestStringVar(t *testing.T) {
-
-	cfg := New(Params{
-		Args: []string{"--foo=CLI"},
-		Env:  map[string]string{"FOO": "ENV", "BAR": "ENV"},
-	})
-
-	var foo, bar, baz string
-
-	cfg.StringVar(&foo, "foo", "DEF", "")
-	cfg.StringVar(&bar, "bar", "DEF", "")
-	cfg.StringVar(&baz, "baz", "DEF", "")
-
-	assert.NoError(t, cfg.Init(context.Background()))
-	assert.Equal(t, "CLI", foo)
-	assert.Equal(t, "ENV", bar)
-	assert.Equal(t, "DEF", baz)
-}
-
-func TestIntVar(t *testing.T) {
-
-	cfg := New(Params{
-		Args: []string{"--foo=111"},
-		Env:  map[string]string{"FOO": "222", "BAR": "222"},
-	})
-
-	var foo, bar, baz int
-
-	cfg.IntVar(&foo, "foo", 333, "")
-	cfg.IntVar(&bar, "bar", 333, "")
-	cfg.IntVar(&baz, "baz", 333, "")
-
-	assert.NoError(t, cfg.Init(context.Background()))
-	assert.Equal(t, 111, foo)
-	assert.Equal(t, 222, bar)
-	assert.Equal(t, 333, baz)
-}
-
-func TestBoolVar(t *testing.T) {
-
-	cfg := New(Params{
-		Args: []string{"--foo=1"},
-		Env:  map[string]string{"FOO": "0", "BAR": "anything", "BIZ": "0"},
-	})
-
-	var foo, bar, baz, biz bool
-
-	cfg.BoolVar(&foo, "foo", false, "")
-	cfg.BoolVar(&bar, "bar", false, "")
-	cfg.BoolVar(&baz, "baz", false, "")
-	cfg.BoolVar(&biz, "biz", true, "")
-
-	assert.NoError(t, cfg.Init(context.Background()))
-	assert.Equal(t, true, foo)
-	assert.Equal(t, true, bar)
-	assert.Equal(t, false, baz)
-	assert.Equal(t, false, biz)
-}
diff --git a/srv/src/cfg/data_dir.go b/srv/src/cfg/data_dir.go
deleted file mode 100644
index 649bc15..0000000
--- a/srv/src/cfg/data_dir.go
+++ /dev/null
@@ -1,74 +0,0 @@
-package cfg
-
-import (
-	"context"
-	"fmt"
-	"os"
-
-	"github.com/mediocregopher/mediocre-go-lib/v2/mctx"
-)
-
-// DataDir manages the blog's data directory.
-type DataDir struct {
-	Path string
-
-	deleteOnClose bool
-}
-
-// Init initializes the data directory, creating the directory named at path if
-// it doesn't exist.
-//
-// If Path is not set, then a temporary directory will be created and its path
-// set to the Path field. This directory will be removed when Close is called.
-func (d *DataDir) Init() error {
-	if d.Path == "" {
-
-		d.deleteOnClose = true
-		var err error
-
-		if d.Path, err = os.MkdirTemp("", "mediocre-blog-data-*"); err != nil {
-			return fmt.Errorf("creating temporary directory: %w", err)
-		}
-
-		return nil
-	}
-
-	if err := os.MkdirAll(d.Path, 0700); err != nil {
-		return fmt.Errorf(
-			"creating directory (and parents) of %q: %w",
-			d.Path,
-			err,
-		)
-	}
-
-	return nil
-}
-
-// SetupCfg implement the cfg.Cfger interface.
-func (d *DataDir) SetupCfg(cfg *Cfg) {
-
-	cfg.StringVar(&d.Path, "data-dir", "", "Directory to use for persistent storage. If unset a temp directory will be created, and will be deleted when the process exits.")
-
-	cfg.OnInit(func(ctx context.Context) error {
-		return d.Init()
-	})
-}
-
-// Annotate implements mctx.Annotator interface.
-func (d *DataDir) Annotate(a mctx.Annotations) {
-	a["dataDirPath"] = d.Path
-}
-
-// Close cleans up any temporary state created by DataDir.
-func (d *DataDir) Close() error {
-
-	if !d.deleteOnClose {
-		return nil
-	}
-
-	if err := os.RemoveAll(d.Path); err != nil {
-		return fmt.Errorf("removing temp dir %q: %w", d.Path, err)
-	}
-
-	return nil
-}
diff --git a/srv/src/cfg/mediocre_blog.go b/srv/src/cfg/mediocre_blog.go
deleted file mode 100644
index 98fe08c..0000000
--- a/srv/src/cfg/mediocre_blog.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package cfg
-
-// this file contains functionality specific to the mediocre blog.
-
-// NewBlogCfg returns a Cfg specifically configured for mediocre blog processes.
-func NewBlogCfg(params Params) *Cfg {
-	params.EnvPrefix = "MEDIOCRE_BLOG"
-	return New(params)
-}