feat: support step summary and cache reset

.github/workflows/build.yml

@@ -57,6 +57,7 @@ jobs:
               build --system-path \
                 --host "$host" \
                 --flake . \
+                --verbose \
                 -- \
                 --print-build-logs
           done

pkgs/oizys/oizys-go/cmd/root.go

@@ -5,8 +5,8 @@ import (
 
 	o "oizys/internal/oizys"
 
-	"github.com/charmbracelet/log"
 	"github.com/charmbracelet/lipgloss"
+	"github.com/charmbracelet/log"
 	cc "github.com/ivanpirog/coloredcobra"
 	"github.com/spf13/cobra"
 )
@@ -35,6 +35,7 @@ var (
 	verbose    bool
 	nom        bool
 	systemPath bool
+	resetCache bool
 )
 
 var oizys = o.NewOizys()
@@ -47,7 +48,7 @@ var rootCmd = &cobra.Command{
 			log.Info("running with verbose mode")
 			log.SetLevel(log.DebugLevel)
 		}
-		oizys.Set(flake, host, cacheName, verbose, systemPath)
+		oizys.Set(flake, host, cacheName, verbose, systemPath, resetCache)
 		oizys.CheckFlake()
 	},
 }
@@ -75,4 +76,5 @@ func init() {
 	rootCmd.PersistentFlags().StringVar(&flake, "flake", "", "path to flake ($OIZYS_DIR or $HOME/oizys)")
 	rootCmd.PersistentFlags().StringVar(&host, "host", "", "host to build (current host)")
 	rootCmd.PersistentFlags().BoolVarP(&verbose, "verbose", "v", false, "show verbose output")
+	rootCmd.PersistentFlags().BoolVar(&resetCache, "reset-cache", false, "set narinfo-cache-negative-ttl to 0")
 }

pkgs/oizys/oizys-go/internal/oizys/main.go

@@ -22,25 +22,32 @@ type Oizys struct {
 	flake         string
 	host          string
 	cache         string
+	githubSummary string
+	inCI          bool
 	verbose       bool
 	systemPath    bool
+	resetCache    bool
 }
 
 func NewOizys() *Oizys {
+	o := new(Oizys)
+	o.cache = "daylin"
 	hostname, err := os.Hostname()
 	if err != nil {
 		log.Fatal(err)
 	}
-	flake := ""
+	o.host = hostname
 	oizysDir, ok := os.LookupEnv("OIZYS_DIR")
 	if !ok {
 		home := os.Getenv("HOME")
-		flake = fmt.Sprintf("%s/%s", home, "oizys")
+		o.flake = fmt.Sprintf("%s/%s", home, "oizys")
 	} else {
-		flake = oizysDir
+		o.flake = oizysDir
 	}
+	o.githubSummary = os.Getenv("GITHUB_STEP_SUMMARY")
+	o.inCI = o.githubSummary != ""
 
-	return &Oizys{flake: flake, host: hostname, cache: "daylin"}
+	return o
 }
 
 type Derivation struct {
@@ -66,7 +73,6 @@ func (o *Oizys) getSystemPath() string {
 	// TODO: add spinner?
 	// cmd.Stderr = os.Stderr
 	s := nixSpinner(o.host)
-	// result, err := cmd.CombinedOutput()
 	out, err := cmd.Output()
 	s.Stop()
 	if err != nil {
@@ -102,7 +108,7 @@ func (o *Oizys) Output() string {
 
 func (o *Oizys) Set(
 	flake, host, cache string,
-	verbose, systemPath bool,
+	verbose, systemPath, resetCache bool,
 ) {
 	if host != "" {
 		o.host = host
@@ -115,6 +121,7 @@ func (o *Oizys) Set(
 	}
 	o.verbose = verbose
 	o.systemPath = systemPath
+	o.resetCache = resetCache
 }
 
 func terminalSize() (int, int) {
@@ -320,9 +327,41 @@ func (o *Oizys) NixBuild(nom bool, rest ...string) {
 		cmd.Args = append(cmd.Args, fmt.Sprintf("%s^*", o.getSystemPath()))
 	}
 	cmd.Args = append(cmd.Args, rest...)
+	if o.resetCache {
+		cmd.Args = append(cmd.Args, "--narinfo-cache-positive-ttl", "0")
+	}
+	if o.inCI {
+		o.ciPreBuild(cmd)
+	}
 	runCommand(cmd)
 }
 
+func (o *Oizys) writeToGithubStepSummary(txt string) {
+	f, err := os.OpenFile(o.githubSummary, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
+	if err != nil {
+		log.Fatal(err)
+	}
+	if _, err := f.Write([]byte(txt)); err != nil {
+		log.Fatal(err)
+	}
+	if err := f.Close(); err != nil {
+		log.Fatal(err)
+	}
+}
+
+func (o *Oizys) ciPreBuild(cmd *exec.Cmd) {
+	// TODO: is this exec.Command call necessary?
+  ciCmd := exec.Command(cmd.Args[0], cmd.Args[1:]...)
+	ciCmd.Args = append(ciCmd.Args, "--dry-run")
+  logCmd(ciCmd)
+	output, err := ciCmd.CombinedOutput()
+	if err != nil {
+    showFailedOutput(output)
+    log.Fatal(err)
+	}
+	o.writeToGithubStepSummary(fmt.Sprintf("# %s\n\n%s", o.host, string(output)))
+}
+
 func (o *Oizys) getChecks() []string {
 	attrName := fmt.Sprintf("%s#%s", o.flake, "checks.x86_64-linux")
 	cmd := exec.Command("nix", "eval", attrName, "--apply", "builtins.attrNames", "--json")