fix: build GTS docker image from base Alpine image

Changes:

- Update the Dockerfile template to build the GTS image from alpine:3.17.
- Add logic to download and verify GTS packages.
- Allow the Download target to be more forgiving for a service that does not need to download any files.
- The Download target is now a dependency to the Render target for all services that aren't named 'compose'.
- Update the path to the web files in the GTS config file.
- Update the entrypoint to use the correct path of the GTS executable file.

Chores:

- Remove unused DockerImageDigest setting from GTS config.

magefiles/config.go

@@ -59,7 +59,6 @@ type forgejoConfig struct {
 
 type gotosocialConfig struct {
 	Version                string `json:"version"`
-	DockerImageDigest      string `json:"dockerImageDigest"`
 	Name                   string `json:"name"`
 	LogLevel               string `json:"logLevel"`
 	LinuxUID               int32  `json:"linuxUID"`

magefiles/download_forgejo.go

@@ -111,8 +111,7 @@ func downloadForgejo(version string) error {
 		return fmt.Errorf("GPG verification failed; %w", err)
 	}
 
-	err = os.Chdir(downloadFolder)
+	if err := os.Chdir(downloadFolder); err != nil {
-	if err != nil {
 		return err
 	}
 

magefiles/download_gotosocial.go

@@ -0,0 +1,109 @@
+//go:build mage
+
+package main
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"github.com/magefile/mage/sh"
+)
+
+func downloadGoToSocial(version string) error {
+	downloadFolder := filepath.Join(rootBuildDir, "gotosocial")
+
+	if err := os.MkdirAll(downloadFolder, 0o750); err != nil {
+		return fmt.Errorf("unable to make %s; %w", downloadFolder, err)
+	}
+
+	binaryTarUrl := fmt.Sprintf(
+		"https://github.com/superseriousbusiness/gotosocial/releases/download/v%s/gotosocial_%s_linux_amd64.tar.gz",
+		version,
+		version,
+	)
+	binaryTarFilepath := filepath.Join(downloadFolder, fmt.Sprintf("gotosocial_%s_linux_amd64.tar.gz", version))
+
+	webAssetsTarUrl := fmt.Sprintf(
+		"https://github.com/superseriousbusiness/gotosocial/releases/download/v%s/gotosocial_%s_web-assets.tar.gz",
+		version,
+		version,
+	)
+	webAssetsFilepath := filepath.Join(downloadFolder, fmt.Sprintf("gotosocial_%s_web-assets.tar.gz", version))
+
+	checksumUrl := fmt.Sprintf(
+		"https://github.com/superseriousbusiness/gotosocial/releases/download/v%s/checksums.txt",
+		version,
+	)
+	checksumFilePath := filepath.Join(downloadFolder, fmt.Sprintf("gotosocial_%s_checksums.txt", version))
+
+	_, err := os.Stat(binaryTarFilepath)
+	if err == nil {
+		fmt.Printf("GoToSocial %s is already downloaded.\n", version)
+		return nil
+	}
+
+	downloads := []struct {
+		url  string
+		path string
+	}{
+		{
+			url:  binaryTarUrl,
+			path: binaryTarFilepath,
+		},
+		{
+			url:  webAssetsTarUrl,
+			path: webAssetsFilepath,
+		},
+		{
+			url:  checksumUrl,
+			path: checksumFilePath,
+		},
+	}
+
+	for _, v := range downloads {
+		if err := func() error {
+			download, err := os.Create(v.path)
+			if err != nil {
+				return fmt.Errorf("unable to create %s; %w", v.path, err)
+			}
+			defer download.Close()
+
+			client := http.Client{
+				CheckRedirect: func(r *http.Request, _ []*http.Request) error {
+					r.URL.Opaque = r.URL.Path
+					return nil
+				},
+			}
+
+			resp, err := client.Get(v.url)
+			if err != nil {
+				return err
+			}
+			defer resp.Body.Close()
+
+			size, err := io.Copy(download, resp.Body)
+			if err != nil {
+				return err
+			}
+
+			fmt.Printf("Downloaded %s with size %d.\n", v.path, size)
+
+			return nil
+		}(); err != nil {
+			return err
+		}
+	}
+
+	if err := os.Chdir(downloadFolder); err != nil {
+		return err
+	}
+
+	if err := sh.Run("sha256sum", "--check", "--ignore-missing", fmt.Sprintf("gotosocial_%s_checksums.txt", version)); err != nil {
+		return err
+	}
+
+	return nil
+}

magefiles/mage.go

@@ -38,19 +38,24 @@ func Clean() error {
 	return nil
 }
 
-// Download downaloads the binaries for a given service.
+// Download downloads the binaries for a given service.
 func Download(name string) error {
 	cfg, err := newConfig(configFile)
 	if err != nil {
 		return fmt.Errorf("unable to load the configuration; %v", err)
 	}
 
-	if name == "forgejo" {
+	switch name {
+	case "forgejo":
 		if err := downloadForgejo(cfg.Forgejo.Version); err != nil {
 			return fmt.Errorf("an error occurred whilst getting the forgejo binary; %w", err)
 		}
-	} else {
+	case "gotosocial":
-		return fmt.Errorf("unsupported service: %s", name)
+		if err := downloadGoToSocial(cfg.GoToSocial.Version); err != nil {
+			return fmt.Errorf("an error occurred whilst getting the packages for GoToSocial; %w", err)
+		}
+	default:
+		fmt.Printf("'%s' has no files to download.\n", name)
 	}
 
 	return nil

magefiles/render.go

@@ -20,12 +20,6 @@ func Render(name string) error {
 		return fmt.Errorf("unable to load the configuration; %v", err)
 	}
 
-	if name == "forgejo" || name == "all" {
-		mg.Deps(
-			mg.F(Download, "forgejo"),
-		)
-	}
-
 	if name == "all" {
 		objects, err := os.ReadDir(rootTemplatesDir)
 		if err != nil {
@@ -39,6 +33,12 @@ func Render(name string) error {
 
 			dirName := o.Name()
 
+			if dirName != "compose" {
+				mg.Deps(
+					mg.F(Download, dirName),
+				)
+			}
+
 			log.Printf("Rendering templates for %s.\n", dirName)
 			if err := render(cfg, o.Name()); err != nil {
 				return fmt.Errorf("unable to render templates for %s; %w", dirName, err)
@@ -47,6 +47,7 @@ func Render(name string) error {
 	} else {
 		if name != "compose" {
 			mg.Deps(
+				mg.F(Download, name),
 				mg.F(Render, "compose"),
 			)
 		}

templates/gotosocial/Dockerfile.gotmpl

@@ -1,19 +1,26 @@
-FROM superseriousbusiness/gotosocial:{{ .GoToSocial.Version }}@{{ .GoToSocial.DockerImageDigest }}
+# syntax=docker/dockerfile:1
+FROM alpine:3.17
 
-USER 0
+WORKDIR /tmp
 
-RUN apk update && apk upgrade && apk add bash \
+RUN --mount=type=bind,source=.,target=/packages \
+    apk update --no-cache && apk add bash --no-cache \
     && addgroup -S -g {{ .FlowGID }} flow \
     && adduser -S -H -D -s /bin/bash -u {{ .GoToSocial.LinuxUID }} -G flow gts \
-    && chown -R {{ .GoToSocial.LinuxUID }}:{{ .GoToSocial.LinuxUID }} /gotosocial \
+    && mkdir -p /flow/gts/config \
-    && mkdir -p /flow/gts/tmp /flow/gts/config && chown -R {{ .GoToSocial.LinuxUID }}:{{ .GoToSocial.LinuxUID }} /flow/gts
+    && tar xzvf /packages/gotosocial_{{ .GoToSocial.Version }}_linux_amd64.tar.gz \
+    && tar xzvf /packages/gotosocial_{{ .GoToSocial.Version }}_web-assets.tar.gz \
+    && mv /tmp/gotosocial /usr/local/bin/gotosocial \
+    && mv /tmp/web /flow/gts \
+    && chown -R {{ .GoToSocial.LinuxUID }}:{{ .FlowGID }} /flow/gts \
+    && rm -rf /tmp/*
 
-COPY --chown={{ .GoToSocial.LinuxUID }}:{{ .GoToSocial.LinuxUID }} entrypoint.sh /usr/local/bin/entrypoint.sh
+COPY --chown={{ .GoToSocial.LinuxUID }}:{{ .GoToSocial.LinuxUID }} entrypoint.sh /usr/local/bin/entrypoint
 COPY --chown={{ .GoToSocial.LinuxUID }}:{{ .GoToSocial.LinuxUID }} config.yaml /flow/gts/config/config.yaml
 COPY --chown={{ .GoToSocial.LinuxUID }}:{{ .FlowGID }} traefik_gotosocial.yaml /flow/gts/tmp/traefik_gotosocial.yaml
 
-RUN chmod a+x /usr/local/bin/entrypoint.sh
+RUN chmod a+x /usr/local/bin/entrypoint
 
 USER {{ .GoToSocial.LinuxUID }}:{{ .FlowGID }}
 
-ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]
+ENTRYPOINT ["entrypoint"]

templates/gotosocial/config.yaml.gotmpl

@@ -290,12 +290,12 @@ cache:
 # String. Directory from which gotosocial will attempt to load html templates (.tmpl files).
 # Examples: ["/some/absolute/path/", "./relative/path/", "../../some/weird/path/"]
 # Default: "./web/template/"
-web-template-base-dir: "./web/template/"
+web-template-base-dir: "/flow/gts/web/template/"
 
 # String. Directory from which gotosocial will attempt to serve static web assets (images, scripts).
 # Examples: ["/some/absolute/path/", "./relative/path/", "../../some/weird/path/"]
 # Default: "./web/assets/"
-web-asset-base-dir: "./web/assets/"
+web-asset-base-dir: "/flow/gts/web/assets/"
 
 ###########################
 ##### INSTANCE CONFIG #####

templates/gotosocial/entrypoint.sh.gotmpl

@@ -11,4 +11,4 @@ fi
 
 mkdir -p {{ .GoToSocial.DataContainerDirectory }}/database
 
-exec /gotosocial/gotosocial --config-path /flow/gts/config/config.yaml server start
+exec gotosocial --config-path /flow/gts/config/config.yaml server start