72b80e2 · nix-container

git.iko.soy/nix-container

Replace zellij with herdr as the session multiplexer

commit72b80e2a83a643439ac67e0b9139980deb951d93 authoriko <mail@iko.soy> dateMon 29 Jun 2026, 04:32 (3 months ago) parent0681f27

3 files changed+18−18

unifiedsplit

README.md+3−3 c+7−7 flake.nix+8−8

README.md+3−3

@@ -6,7 +6,7 @@ Apple's [`container`](https://github.com/apple/container) CLI on macOS.

77It's a plain, single-process image — no NixOS, no systemd — defined in

88[`flake.nix`](./flake.nix). `c start` drops you into a

9−[`zellij`](https://zellij.dev) session whose panes use your host login shell

9+[`herdr`](https://herdr.dev) session whose panes use your host login shell

1010(detected and bundled by `c init`). You choose what else it ships via a

1111per-project `container.nix`.

1212

@@ -49,7 +49,7 @@ nixpkgs) and an optional `mounts` list. It is **required**; there is no default.

4949```

5050

5151Your **host login shell** (detected by `c init`, bash fallback), **coreutils**,

52−[**zellij**](https://zellij.dev) (the session `c start` launches), **Nix** itself

52+[**herdr**](https://herdr.dev) (the session `c start` launches), **Nix** itself

5353(with CA certs and `nix-command`/`flakes` enabled, single-user), and the ncurses

5454**terminfo** database are always included — no need to list them.

5555

@@ -68,7 +68,7 @@ that holds a `container.nix`; the container is named after that directory.

6868# build the image, load it, and create the container (named after $PWD):

6969nix run github:ilyakooo0/nix-container -- init

7070

71−# start it and attach — drops you into a zellij session:

71+# start it and attach — drops you into a herdr session:

7272nix run github:ilyakooo0/nix-container -- start

7373```

7474

c+7−7

@@ -28,7 +28,7 @@ switch $argv[1]

2828 end

2929

3030 # Host login shell (by name): added to the image automatically and baked

31− # in as the cmd + default $SHELL (what zellij panes etc. spawn), so it

31+ # in as the cmd + default $SHELL (what herdr panes etc. spawn), so it

3232 # needn't be listed in container.nix. Falls back to bash.

3333 set -l shell bash

3434 test -n "$SHELL"; and set shell (path basename $SHELL)

@@ -74,19 +74,19 @@ switch $argv[1]

7474 end

7575

7676 # Replace any existing container of the same name, then create it running

77− # zellij in a session named after the project (`<dir>-container`). This

78− # overrides the image's default plain-zellij cmd; `c start` attaches to it.

77+ # herdr in a session named after the project (`<dir>-container`). This

78+ # overrides the image's default plain-herdr cmd; `c start` attaches to it.

7979 container rm --force $name 2>/dev/null

8080 # The image only lays down /bin and /etc, so /tmp and /run don't exist;

81− # without them anything that writes temp files (zellij, build tools, …)

81+ # without them anything that writes temp files (herdr, build tools, …)

8282 # fails with ENOENT. Mount writable tmpfs at both.

8383 container create --name $name --ssh -it -e "TERM=$term" \

8484 --tmpfs /tmp --tmpfs /run --memory 8g --cwd /workspace $mounts $argv \

85− $image /bin/zellij --session "$name-container"

85+ $image /bin/herdr session attach "$name-container"

8686 case start

87− # Start the container and attach to its cmd (zellij). TERM was baked into

87+ # Start the container and attach to its cmd (herdr). TERM was baked into

8888 # the container env at create time (`-e TERM`), which survives this path.

89− # Exiting zellij (PID1) stops the container; `c start` boots it again.

89+ # Exiting herdr (PID1) stops the container; `c start` boots it again.

9090 container start -ai $name

9191 case '*'

9292 echo "usage: c init [-c FILE] [create args] | start" >&2

flake.nix+8−8

@@ -78,9 +78,9 @@

7878 imageTag = "latest";

7979

8080 # Build the OCI image (named `name`) from a `{ pkgs, nur }: [ ... ]`

81− # package function, for the named shell. The image's `cmd` is zellij

81+ # package function, for the named shell. The image's `cmd` is herdr

8282 # (the session `c start` attaches to); the shell is the default `$SHELL`

83− # (what zellij panes spawn) and is added automatically, so `container.nix`

83+ # (what herdr panes spawn) and is added automatically, so `container.nix`

8484 # lists only your extras. Nix (+ CA certs) and the ncurses terminfo

8585 # database are always shipped too. Nothing here is fish-specific: the

8686 # TERM fixup happens host-side in `c` (passed via `-e TERM` at create).

@@ -119,7 +119,7 @@

119119 # entry for whatever TERM `c` passes in and render correctly.

120120 pkgsLinux.ncurses

121121 # The session `c start` always launches.

122− pkgsLinux.zellij

122+ pkgsLinux.herdr

123123 ];

124124 # Link all of /etc so the above files (nsswitch.conf, protocols,

125125 # services, passwd, group, ssl certs) are present.

@@ -133,15 +133,15 @@

133133

134134 config = {

135135 # `cmd` (not `entrypoint`): the default command, *replaced* by any

136− # command passed to `container run/create`. Plain zellij here;

137− # `c init` overrides it with `zellij --session <dir>-container` so

136+ # command passed to `container run/create`. Plain herdr here;

137+ # `c init` overrides it with `herdr session attach <dir>-container` so

138138 # the session is named per project. `c start` attaches via

139− # `container start -ai`; exiting zellij (PID1) stops the container.

140− cmd = [ "/bin/zellij" ];

139+ # `container start -ai`; exiting herdr (PID1) stops the container.

140+ cmd = [ "/bin/herdr" ];

141141 env = [

142142 "PATH=/bin"

143143 "HOME=/root"

144− # Default shell for tools that spawn one (zellij panes, etc.).

144+ # Default shell for tools that spawn one (herdr panes, etc.).

145145 "SHELL=/bin/${shell}"

146146 # Marker so shells/scripts can detect they're in here.

147147 "NIX_CONTAINER=1"