master..69bd573 · nix-container

git.iko.soy/nix-container

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README.md+3−3

since splitsnapshots

unifiedsplit

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

7It's a plain, single-process image — no NixOS, no systemd — defined in

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

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

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

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

11per-project `container.nix`.

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

49```

51Your **host login shell** (detected by `c init`, bash fallback), **coreutils**,

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

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

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

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

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

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

69nix run github:ilyakooo0/nix-container -- init

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

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

72nix run github:ilyakooo0/nix-container -- start

73```

c+10−12

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

28 end

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

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

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

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

33 set -l shell bash

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

@@ -37,8 +37,8 @@ switch $argv[1]

37 # temp dir, load it, then clean up.

38 set -l tmp (mktemp -d)

39 set -l archive $tmp/image.tar.gz

40− set -lx NIX_CONTAINER_CONFIG (path resolve $config)

40+ set -lx NIX_CONTAINER_PKGS (path resolve $config)

41− set -l expr "(builtins.getFlake \"$flake\").lib.\${builtins.currentSystem}.copyWithShell \"nix-container-$name\" \"$shell\" (import (/. + builtins.getEnv \"NIX_CONTAINER_CONFIG\")).packages"

41+ set -l expr "(builtins.getFlake \"$flake\").lib.\${builtins.currentSystem}.copyWithShell \"nix-container-$name\" \"$shell\" (import (/. + builtins.getEnv \"NIX_CONTAINER_PKGS\")).packages"

42 set -l copyer (nix build --impure --no-link --print-out-paths --expr "$expr")

43 set -l rc $status

44 if test $rc -eq 0

@@ -57,7 +57,7 @@ switch $argv[1]

57 # mounts from the config (`mounts = [ "host:container" … ]`). A leading

58 # ~/ in the host path expands to $HOME (nix leaves it literal).

59 set -l mounts -v "$PWD:/workspace"

60− for m in (nix eval --impure --raw --expr "builtins.concatStringsSep \"\n\" ((import (/. + builtins.getEnv \"NIX_CONTAINER_CONFIG\")).mounts or [])")

60+ for m in (nix eval --impure --raw --expr "builtins.concatStringsSep \"\n\" ((import (/. + builtins.getEnv \"NIX_CONTAINER_PKGS\")).mounts or [])")

61 set -a mounts -v (string replace -r '^~/' "$HOME/" -- $m)

62 end

@@ -73,20 +73,18 @@ switch $argv[1]

73 set term $TERM

74 end

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

76+ # Replace any existing container of the same name. The image's cmd is

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

77+ # zellij (`c start` attaches to it), so no command is passed here.

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

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

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

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

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

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

80+ # without them anything that writes temp files (zellij, build tools, …)

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

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

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

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

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

83+ --tmpfs /tmp --tmpfs /run --memory 8g --cwd /workspace $mounts $argv $image

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

86 case start

84 case start

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

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

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

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

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

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

90 container start -ai $name

88 container start -ai $name

91 case '*'

89 case '*'

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

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

flake.nix+8−9

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

78 imageTag = "latest";

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

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

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

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

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

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

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

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

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

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

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

120 pkgsLinux.ncurses

121 # The session `c start` always launches.

122− pkgsLinux.herdr

122+ pkgsLinux.zellij

123 ];

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

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

@@ -133,15 +133,14 @@

133

134 config = {

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

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

136+ # command passed to `container run/create`. It's zellij — the

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

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

137+ # session `c start` attaches to via `container start -ai`; exiting

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

138+ # it (PID1) stops the container.

140− cmd = [ "/bin/herdr" ];

139+ cmd = [ "/bin/zellij" ];

141 env = [

140 env = [

142 "PATH=/bin"

141 "PATH=/bin"

143 "HOME=/root"

142 "HOME=/root"

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

143+ # Default shell for tools that spawn one (zellij panes, etc.).

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

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

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

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

147 "NIX_CONTAINER=1"

146 "NIX_CONTAINER=1"