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package main
import (
"context"
"os"
"strings"
"hakurei.app/container/check"
"hakurei.app/container/fhs"
"hakurei.app/hst"
"hakurei.app/message"
)
func withNixDaemon(
ctx context.Context,
msg message.Msg,
action string, command []string, net bool, updateConfig func(config *hst.Config) *hst.Config,
app *appInfo, pathSet *appPathSet, dropShell bool, beforeFail func(),
) {
flags := hst.FMultiarch | hst.FUserns // nix sandbox requires userns
if net {
flags |= hst.FHostNet
}
if dropShell {
flags |= hst.FTty
}
mustRunAppDropShell(ctx, msg, updateConfig(&hst.Config{
ID: app.ID,
ExtraPerms: []hst.ExtraPermConfig{
{Path: dataHome, Execute: true},
{Ensure: true, Path: pathSet.baseDir, Read: true, Write: true, Execute: true},
},
Identity: app.Identity,
Container: &hst.ContainerConfig{
Hostname: formatHostname(app.Name) + "-" + action,
Filesystem: []hst.FilesystemConfigJSON{
{FilesystemConfig: &hst.FSBind{Target: fhs.AbsEtc, Source: pathSet.cacheDir.Append("etc"), Special: true}},
{FilesystemConfig: &hst.FSBind{Source: pathSet.nixPath, Target: pathNix, Write: true}},
{FilesystemConfig: &hst.FSLink{Target: pathCurrentSystem, Linkname: app.CurrentSystem.String()}},
{FilesystemConfig: &hst.FSLink{Target: pathBin, Linkname: pathSwBin.String()}},
{FilesystemConfig: &hst.FSLink{Target: fhs.AbsUsrBin, Linkname: pathSwBin.String()}},
{FilesystemConfig: &hst.FSBind{Target: pathDataData.Append(app.ID), Source: pathSet.homeDir, Write: true, Ensure: true}},
},
Username: "hakurei",
Shell: pathShell,
Home: pathDataData.Append(app.ID),
Path: pathShell,
Args: []string{bash, "-lc", "rm -f /nix/var/nix/daemon-socket/socket && " +
// start nix-daemon
"nix-daemon --store / & " +
// wait for socket to appear
"(while [ ! -S /nix/var/nix/daemon-socket/socket ]; do sleep 0.01; done) && " +
// create directory so nix stops complaining
"mkdir -p /nix/var/nix/profiles/per-user/root/channels && " +
strings.Join(command, " && ") +
// terminate nix-daemon
" && pkill nix-daemon",
},
Flags: flags,
},
}), dropShell, beforeFail)
}
func withCacheDir(
ctx context.Context,
msg message.Msg,
action string, command []string, workDir *check.Absolute,
app *appInfo, pathSet *appPathSet, dropShell bool, beforeFail func(),
) {
flags := hst.FMultiarch
if dropShell {
flags |= hst.FTty
}
mustRunAppDropShell(ctx, msg, &hst.Config{
ID: app.ID,
ExtraPerms: []hst.ExtraPermConfig{
{Path: dataHome, Execute: true},
{Ensure: true, Path: pathSet.baseDir, Read: true, Write: true, Execute: true},
{Path: workDir, Execute: true},
},
Identity: app.Identity,
Container: &hst.ContainerConfig{
Hostname: formatHostname(app.Name) + "-" + action,
Filesystem: []hst.FilesystemConfigJSON{
{FilesystemConfig: &hst.FSBind{Target: fhs.AbsEtc, Source: workDir.Append(fhs.Etc), Special: true}},
{FilesystemConfig: &hst.FSBind{Source: workDir.Append("nix"), Target: pathNix}},
{FilesystemConfig: &hst.FSLink{Target: pathCurrentSystem, Linkname: app.CurrentSystem.String()}},
{FilesystemConfig: &hst.FSLink{Target: pathBin, Linkname: pathSwBin.String()}},
{FilesystemConfig: &hst.FSLink{Target: fhs.AbsUsrBin, Linkname: pathSwBin.String()}},
{FilesystemConfig: &hst.FSBind{Source: workDir, Target: hst.AbsPrivateTmp.Append("bundle")}},
{FilesystemConfig: &hst.FSBind{Target: pathDataData.Append(app.ID, "cache"), Source: pathSet.cacheDir, Write: true, Ensure: true}},
},
Username: "nixos",
Shell: pathShell,
Home: pathDataData.Append(app.ID, "cache"),
Path: pathShell,
Args: []string{bash, "-lc", strings.Join(command, " && ")},
Flags: flags,
},
}, dropShell, beforeFail)
}
func mustRunAppDropShell(ctx context.Context, msg message.Msg, config *hst.Config, dropShell bool, beforeFail func()) {
if dropShell {
if config.Container != nil {
config.Container.Args = []string{bash, "-l"}
}
mustRunApp(ctx, msg, config, beforeFail)
beforeFail()
msg.BeforeExit()
os.Exit(0)
}
mustRunApp(ctx, msg, config, beforeFail)
}
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