Rebrand to boco

Cargo.lock

@@ -76,6 +76,28 @@ version = "2.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ded4057c258ba199e2d26386d3af3780957ecaee6c4ef4041c6b4b8b97c0b06"
 
+[[package]]
+name = "boco"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "base64",
+ "clap",
+ "flate2",
+ "serde",
+ "serde_json",
+ "tempfile",
+ "xdg",
+]
+
+[[package]]
+name = "boco-init"
+version = "0.1.0"
+dependencies = [
+ "base64",
+ "nix",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.4"
@@ -337,28 +359,6 @@ version = "0.3.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3a219298ac11a56ea9a6d2120044824d6f01aeb034955e7af7bc16858527deea"
 
-[[package]]
-name = "slim"
-version = "0.1.0"
-dependencies = [
- "anyhow",
- "base64",
- "clap",
- "flate2",
- "serde",
- "serde_json",
- "tempfile",
- "xdg",
-]
-
-[[package]]
-name = "slim-init"
-version = "0.1.0"
-dependencies = [
- "base64",
- "nix",
-]
-
 [[package]]
 name = "strsim"
 version = "0.11.1"

Cargo.toml

@@ -7,7 +7,7 @@ lto = true
 strip = true
 
 [package]
-name = "slim"
+name = "boco"
 version = "0.1.0"
 edition = "2024"
 

README.md

@@ -1,4 +1,4 @@
-# slim
+# boco
 
 Turning containers into bootable VMs
 
@@ -6,27 +6,27 @@ Turning containers into bootable VMs
 
 ```sh
 # Build the container
-podman build ./example/alpine -t slim-alpine
+podman build ./example/alpine -t boco-alpine
 
-# Make the container bootable. slim injects /slim/init and /slim/exec,
+# Make the container bootable. boco injects /boco/init and /boco/exec,
 # then packs the rootfs as a qcow2 disk.
-slim build qcow2 slim-alpine
+boco build qcow2 boco-alpine
 
 # Boot the image using QEMU. The container's CMD runs automatically.
-slim run slim-alpine
+boco boot boco-alpine
 
 # Override the command at runtime (base64-encoded on the kernel cmdline):
-slim run slim-alpine --cmd '/bin/sh'
+boco boot boco-alpine --cmd '/bin/sh'
 
-# Override the command at build time (baked into /slim/exec):
-slim build qcow2 slim-alpine --cmd '/bin/sh'
+# Override the command at build time (baked into /boco/exec):
+boco build qcow2 boco-alpine --cmd '/bin/sh'
 
 # Cleanup
-slim image rm slim-alpine
-podman image rm slim-alpine
+boco image rm boco-alpine
+podman image rm boco-alpine
 ```
 
 ## Kernel
 
-slim boots VMs using a shared kernel at `$XDG_DATA_HOME/slim-rs/registry/vmlinuz`.
-Place a suitable x86 bzImage there before running `slim run`.
+boco boots VMs using a shared kernel at `$XDG_DATA_HOME/boco/registry/vmlinuz`.
+Place a suitable x86 bzImage there before running `boco boot`.

example/test.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
-# Test script for slim - boots containers and verifies CMD inference/override.
+# Test script for boco - boots containers and verifies CMD inference/override.
 # Requires: podman, qemu-system-x86_64, KVM, curl, and a kernel at
-# $XDG_DATA_HOME/slim-rs/registry/vmlinuz.
+# $XDG_DATA_HOME/boco/registry/vmlinuz.
 set -u
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 TARGET_DIR="${CARGO_TARGET_DIR:-$SCRIPT_DIR/../target}"
-SLIM_BIN="$TARGET_DIR/debug/slim"
+BOCO_BIN="$TARGET_DIR/debug/boco"
 TIMEOUT=120
 
 pass=0
@@ -34,7 +34,7 @@ check_output() {
 }
 
 cleanup() {
-    "$SLIM_BIN" image rm "$1" >/dev/null 2>&1 || true
+    "$BOCO_BIN" image rm "$1" >/dev/null 2>&1 || true
     podman image rm "$2" >/dev/null 2>&1 || true
 }
 
@@ -54,10 +54,10 @@ FROM $from
 $extra_setup
 CMD ["/bin/sh", "-c", "echo CMD_INFERRED_OK; wget -q -O /dev/null http://1.1.1.1 2>/dev/null && echo CONN_OK; wget -q -O /dev/null http://example.org 2>/dev/null && echo DNS_OK; poweroff -f"]
 EOF
-    img="slim-test-$distro-infer"
+    img="boco-test-$distro-infer"
     if podman build -t "$img" -f "$work/Containerfile.infer" >/dev/null 2>&1; then
-        "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1
-        output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" 2>&1 || true)
+        "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1
+        output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" 2>&1 || true)
         check_output "$output" "CMD_INFERRED_OK" "$distro CMD-inferred"
         check_output "$output" "CONN_OK" "$distro connect to 1.1.1.1"
         check_output "$output" "DNS_OK" "$distro DNS lookup"
@@ -66,34 +66,34 @@ EOF
     fi
     cleanup "$img" "$img"
 
-    # === Test 2: slim run --cmd override ===
-    echo "-- Test 2: slim run --cmd override"
+    # === Test 2: boco boot --cmd override ===
+    echo "-- Test 2: boco boot --cmd override"
     cat > "$work/Containerfile.run" <<EOF
 FROM $from
 $extra_setup
 CMD ["/bin/sh", "-c", "echo SHOULD_NOT_APPEAR; poweroff -f"]
 EOF
-    img="slim-test-$distro-run"
+    img="boco-test-$distro-run"
     if podman build -t "$img" -f "$work/Containerfile.run" >/dev/null 2>&1; then
-        "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1
-        output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" --cmd 'echo RUN_OVERRIDE_OK; poweroff -f' 2>&1 || true)
-        check_output "$output" "RUN_OVERRIDE_OK" "$distro run --cmd override"
+        "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1
+        output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" --cmd 'echo RUN_OVERRIDE_OK; poweroff -f' 2>&1 || true)
+        check_output "$output" "RUN_OVERRIDE_OK" "$distro boot --cmd override"
     else
-        report fail "$distro run --cmd override (podman build failed)"
+        report fail "$distro boot --cmd override (podman build failed)"
     fi
     cleanup "$img" "$img"
 
-    # === Test 3: slim build --cmd override ===
-    echo "-- Test 3: slim build --cmd override"
+    # === Test 3: boco build --cmd override ===
+    echo "-- Test 3: boco build --cmd override"
     cat > "$work/Containerfile.build" <<EOF
 FROM $from
 $extra_setup
 CMD ["/bin/sh", "-c", "echo SHOULD_NOT_APPEAR; poweroff -f"]
 EOF
-    img="slim-test-$distro-build"
+    img="boco-test-$distro-build"
     if podman build -t "$img" -f "$work/Containerfile.build" >/dev/null 2>&1; then
-        "$SLIM_BIN" build qcow2 "$img" --cmd 'echo BUILD_OVERRIDE_OK; poweroff -f' >/dev/null 2>&1
-        output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" 2>&1 || true)
+        "$BOCO_BIN" build qcow2 "$img" --cmd 'echo BUILD_OVERRIDE_OK; poweroff -f' >/dev/null 2>&1
+        output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" 2>&1 || true)
         check_output "$output" "BUILD_OVERRIDE_OK" "$distro build --cmd override"
     else
         report fail "$distro build --cmd override (podman build failed)"
@@ -107,7 +107,7 @@ test_user() {
     echo "=== Testing USER directive ==="
 
     work="$(mktemp -d)"
-    img="slim-test-user"
+    img="boco-test-user"
 
     cat > "$work/Containerfile" <<'EOF'
 FROM alpine:latest
@@ -124,13 +124,13 @@ EOF
     fi
 
     echo "-- Test 1: build-time CMD runs as USER"
-    "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1
-    output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" 2>&1 || true)
+    "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1
+    output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" 2>&1 || true)
     check_output "$output" "USER_BUILD_OK:1500:testuser" "USER build-time CMD runs as testuser"
 
-    echo "-- Test 2: run --cmd override runs as USER"
-    output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" --cmd 'echo USER_RUN_OK:$(id -u):$(whoami); poweroff -f' 2>&1 || true)
-    check_output "$output" "USER_RUN_OK:1500:testuser" "USER run --cmd override runs as testuser"
+    echo "-- Test 2: boot --cmd override runs as USER"
+    output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" --cmd 'echo USER_RUN_OK:$(id -u):$(whoami); poweroff -f' 2>&1 || true)
+    check_output "$output" "USER_RUN_OK:1500:testuser" "USER boot --cmd override runs as testuser"
 
     cleanup "$img" "$img"
     rm -rf "$work"
@@ -142,7 +142,7 @@ test_mount() {
     work="$(mktemp -d)"
 
     # --- Image 1: no WORKINGDIR, test host:guest and multi-mount ---
-    img="slim-test-mount"
+    img="boco-test-mount"
     share_dir="$work/share"
     share_dir2="$work/share2"
     guest_dir="/mnt/guest"
@@ -164,9 +164,9 @@ EOF
         return
     fi
 
-    echo "-- Building slim VM..."
-    if ! "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1; then
-        report fail "--mount (slim build failed)"
+    echo "-- Building boco VM..."
+    if ! "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1; then
+        report fail "--mount (boco build failed)"
         cleanup "$img" "$img"
         rm -rf "$work"
         return
@@ -176,14 +176,14 @@ EOF
     share_canon2=$(readlink -f "$share_dir2")
 
     echo "-- Test 1: --mount host:guest (absolute guest path, multi-mount)..."
-    output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" \
+    output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" \
         --mount "${share_dir}:${guest_dir}" \
         --mount "${share_dir2}:${guest_dir2}" \
         --cmd "for f in /sys/bus/virtio/drivers/9pnet_virtio/virtio*/mount_tag; do [ -f \"\$f\" ] && echo \"\$f: \$(tr -d '\\0' < \"\$f\")\"; done; mount -v; cat ${guest_dir}/testfile.txt 2>/dev/null || echo NO_FILE; cat ${guest_dir2}/testfile2.txt 2>/dev/null || echo NO_FILE2; echo MOUNT_VERIFY_DONE; poweroff -f" \
         2>&1 || true)
 
-    check_output "$output" "mount_tag: slim0" "--mount 9p share detected"
-    check_output "$output" "mount_tag: slim1" "--mount second 9p share detected"
+    check_output "$output" "mount_tag: boco0" "--mount 9p share detected"
+    check_output "$output" "mount_tag: boco1" "--mount second 9p share detected"
     check_output "$output" "type 9p" "--mount 9p filesystem in mount list"
     check_output "$output" "hello from host" "--mount file accessible at guest path"
     check_output "$output" "second share" "--mount second file accessible at guest path"
@@ -192,7 +192,7 @@ EOF
     cleanup "$img" "$img"
 
     # --- Image 2: with WORKINGDIR, test relative guest path ---
-    img="slim-test-mount-wd"
+    img="boco-test-mount-wd"
     share_dir3="$work/share3"
 
     mkdir -p "$share_dir3"
@@ -211,16 +211,16 @@ EOF
         return
     fi
 
-    echo "-- Building slim VM..."
-    if ! "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1; then
-        report fail "--mount relative (slim build failed)"
+    echo "-- Building boco VM..."
+    if ! "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1; then
+        report fail "--mount relative (boco build failed)"
         cleanup "$img" "$img"
         rm -rf "$work"
         return
     fi
 
     echo "-- Test 2: --mount host:relative-guest (resolved against WORKINGDIR)..."
-    output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" \
+    output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" \
         --mount "${share_dir3}:data" \
         --cmd "mount -v; cat /app/data/relfile.txt 2>/dev/null || echo NO_REL_FILE; echo REL_VERIFY_DONE; poweroff -f" \
         2>&1 || true)
@@ -236,7 +236,7 @@ EOF
 test_service() {
     echo "=== Testing nextcloud service ==="
 
-    img="slim-test-nextcloud"
+    img="boco-test-nextcloud"
     host_port=18080
     work="$(mktemp -d)"
 
@@ -252,16 +252,16 @@ EOF
         return
     fi
 
-    echo "-- Building slim VM..."
-    if ! "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1; then
-        report fail "nextcloud service (slim build failed)"
+    echo "-- Building boco VM..."
+    if ! "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1; then
+        report fail "nextcloud service (boco build failed)"
         cleanup "$img" "$img"
         rm -rf "$work"
         return
     fi
 
     echo "-- Booting VM with port forward (host :${host_port} -> guest :80)..."
-    setsid timeout 300 "$SLIM_BIN" run "$img" \
+    setsid timeout 300 "$BOCO_BIN" boot "$img" \
         --forward "tcp:0.0.0.0:${host_port}-:80" \
         --memory 2048M >/dev/null 2>&1 &
     vm_pid=$!
@@ -299,11 +299,11 @@ test_systemd() {
     echo "=== Testing systemd as init ==="
 
     work="$(mktemp -d)"
-    img="slim-test-systemd"
+    img="boco-test-systemd"
 
-    cat > "$work/slim-test.service" <<'SVC'
+    cat > "$work/boco-test.service" <<'SVC'
 [Unit]
-Description=slim systemd test
+Description=boco systemd test
 After=multi-user.target
 
 [Service]
@@ -316,10 +316,10 @@ SVC
 
     cat > "$work/Containerfile" <<EOF
 FROM archlinux:latest
-COPY slim-test.service /etc/systemd/system/slim-test.service
+COPY boco-test.service /etc/systemd/system/boco-test.service
 RUN mkdir -p /etc/systemd/system/multi-user.target.wants && \
-    ln -sf /etc/systemd/system/slim-test.service \
-       /etc/systemd/system/multi-user.target.wants/slim-test.service
+    ln -sf /etc/systemd/system/boco-test.service \
+       /etc/systemd/system/multi-user.target.wants/boco-test.service
 CMD ["/sbin/init"]
 EOF
 
@@ -330,16 +330,16 @@ EOF
         return
     fi
 
-    echo "-- Building slim VM..."
-    if ! "$SLIM_BIN" build qcow2 "$img" >/dev/null 2>&1; then
-        report fail "systemd as init (slim build failed)"
+    echo "-- Building boco VM..."
+    if ! "$BOCO_BIN" build qcow2 "$img" >/dev/null 2>&1; then
+        report fail "systemd as init (boco build failed)"
         cleanup "$img" "$img"
         rm -rf "$work"
         return
     fi
 
     echo "-- Booting VM (systemd as PID 1)..."
-    output=$(timeout "$TIMEOUT" "$SLIM_BIN" run "$img" 2>&1 || true)
+    output=$(timeout "$TIMEOUT" "$BOCO_BIN" boot "$img" 2>&1 || true)
     check_output "$output" "SYSTEMD_TEST_OK" "systemd boots and runs service"
     check_output "$output" "reboot: Power down" "systemd shuts down cleanly"
 
@@ -347,11 +347,11 @@ EOF
     rm -rf "$work"
 }
 
-echo "Building slim..."
+echo "Building boco..."
 cargo build 2>&1
-cargo build --release -p slim-init --target x86_64-unknown-linux-musl 2>&1
-cp target/x86_64-unknown-linux-musl/release/slim-init \
-   "${XDG_DATA_HOME:-$HOME/.local/share}/slim-rs/slim-init"
+cargo build --release -p boco-init --target x86_64-unknown-linux-musl 2>&1
+cp "$TARGET_DIR/x86_64-unknown-linux-musl/release/boco-init" \
+   "${XDG_DATA_HOME:-$HOME/.local/share}/boco/boco-init"
 
 test_distro "alpine" "alpine:latest" ""
 test_distro "archlinux" "archlinux:latest" "RUN pacman -Sy --noconfirm iproute2 wget; pacman -Sc --noconfirm"

init/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "slim-init"
+name = "boco-init"
 version = "0.1.0"
 edition = "2024"
 

init/src/main.rs

@@ -1,6 +1,6 @@
-//! slim universal init.
+//! boco universal init.
 //!
-//! Injected by `slim build` at /slim/init and invoked via init=/slim/init.
+//! Injected by `boco build` at /boco/init and invoked via init=/boco/init.
 //! Sets up devices, filesystems, networking, and 9p shares, then execs the
 //! container's CMD/ENTRYPOINT (or a runtime override) with execvp so the
 //! command becomes PID 1 directly.
@@ -19,7 +19,7 @@ use std::path::Path;
 use std::process::Command;
 
 fn warn(msg: &str) {
-    eprintln!("slim-init: {msg}");
+    eprintln!("boco-init: {msg}");
 }
 
 /// Run a fallible operation, logging on error.
@@ -219,7 +219,7 @@ fn setup_9p_shares(workdir: &str) {
     let b64 = base64::engine::general_purpose::STANDARD;
 
     for tok in cmdline.split_whitespace() {
-        if let Some(rest) = tok.strip_prefix("slim.mount=") {
+        if let Some(rest) = tok.strip_prefix("boco.mount=") {
             let Some((tag, dest_b64)) = rest.split_once(':') else {
                 continue;
             };
@@ -270,11 +270,11 @@ fn split_null_delimited(data: &[u8]) -> Vec<String> {
 }
 
 fn read_argv() -> Vec<String> {
-    // Check for runtime override: slim.cmd=<base64(null-delimited argv)>
+    // Check for runtime override: boco.cmd=<base64(null-delimited argv)>
     let b64 = base64::engine::general_purpose::STANDARD;
     if let Ok(cmdline) = fs::read_to_string("/proc/cmdline") {
         for tok in cmdline.split_whitespace() {
-            if let Some(rest) = tok.strip_prefix("slim.cmd=")
+            if let Some(rest) = tok.strip_prefix("boco.cmd=")
                 && let Ok(decoded) = b64.decode(rest)
             {
                 let argv = split_null_delimited(&decoded);
@@ -285,15 +285,15 @@ fn read_argv() -> Vec<String> {
         }
     }
 
-    // Fall back to build-time argv from /slim/exec
-    match fs::read("/slim/exec") {
+    // Fall back to build-time argv from /boco/exec
+    match fs::read("/boco/exec") {
         Ok(data) => {
             let argv = split_null_delimited(&data);
             if !argv.is_empty() {
                 return argv;
             }
         }
-        Err(e) => warn(&format!("read /slim/exec: {e}")),
+        Err(e) => warn(&format!("read /boco/exec: {e}")),
     }
 
     warn("no command found, falling back to /bin/sh");
@@ -301,7 +301,7 @@ fn read_argv() -> Vec<String> {
 }
 
 fn apply_env() {
-    if let Ok(data) = fs::read("/slim/env") {
+    if let Ok(data) = fs::read("/boco/env") {
         for entry in split_null_delimited(&data) {
             if let Some((key, val)) = entry.split_once('=') {
                 // SAFETY: we are single-threaded before fork/exec.
@@ -312,7 +312,7 @@ fn apply_env() {
 }
 
 fn apply_workdir() {
-    if let Some(dir) = read_file_opt("/slim/workdir") {
+    if let Some(dir) = read_file_opt("/boco/workdir") {
         try_io("set working directory", || env::set_current_dir(&dir));
     }
 }
@@ -413,7 +413,7 @@ fn main() {
     setup_networking();
 
     // === 9p shares ===
-    let workdir = read_file_opt("/slim/workdir").unwrap_or_default();
+    let workdir = read_file_opt("/boco/workdir").unwrap_or_default();
     setup_9p_shares(&workdir);
 
     // === Environment & working directory ===
@@ -421,7 +421,7 @@ fn main() {
     apply_workdir();
 
     // === Resolve user for privilege drop ===
-    let user = read_file_opt("/slim/user").and_then(|spec| resolve_user(&spec));
+    let user = read_file_opt("/boco/user").and_then(|spec| resolve_user(&spec));
 
     // === Execute the configured command ===
     let argv = read_argv();

kernel/config

@@ -41,7 +41,7 @@ CONFIG_THREAD_INFO_IN_TASK=y
 CONFIG_INIT_ENV_ARG_LIMIT=32
 # CONFIG_COMPILE_TEST is not set
 CONFIG_WERROR=y
-CONFIG_LOCALVERSION="-slim"
+CONFIG_LOCALVERSION="-boco"
 CONFIG_LOCALVERSION_AUTO=y
 CONFIG_BUILD_SALT=""
 CONFIG_HAVE_KERNEL_GZIP=y

src/build.rs

@@ -1,4 +1,4 @@
-//! Build: mount a podman image, inject /slim/ scripts, and pack the rootfs
+//! Build: mount a podman image, inject /boco/ scripts, and pack the rootfs
 //! as a gzipped cpio initrd or qcow2 disk in the registry.
 
 use anyhow::{Context, Result, bail};
@@ -41,7 +41,7 @@ pub(crate) fn build(
     }: BuildCmd,
 ) -> Result<()> {
     let image = &name;
-    let container = format!("slim-build-{}", image.replace(':', "-"));
+    let container = format!("boco-build-{}", image.replace(':', "-"));
 
     let mount_path = mount_container(image, &container)?;
     println!("Mounted at: {}", mount_path.display());
@@ -86,7 +86,7 @@ fn build_inner(
         config.user.as_deref(),
         config.working_dir.as_deref(),
     )?;
-    println!("Injected /slim/ (init + exec)");
+    println!("Injected /boco/ (init + exec)");
 
     match kind {
         ImageKind::Initrd => build_initrd(image, mount_path),

src/inject.rs

@@ -1,5 +1,5 @@
 //! Inject: inspect a podman image's config, infer the default command argv,
-//! and inject the slim init binary + null-delimited argv/env files into the
+//! and inject the boco init binary + null-delimited argv/env files into the
 //! mounted rootfs.
 
 use anyhow::{Context, Result, anyhow};
@@ -68,21 +68,21 @@ pub fn null_delimited(items: &[String]) -> Vec<u8> {
     data
 }
 
-/// Install `content` into the mounted rootfs at `<mount>/slim/<name>` with
+/// Install `content` into the mounted rootfs at `<mount>/boco/<name>` with
 /// the given mode.
 fn install_into_rootfs(mount: &str, name: &str, mode: &str, content: &[u8]) -> Result<()> {
     let temp = tempfile::NamedTempFile::new()?;
     fs::write(temp.path(), content)?;
     let src = temp.path().to_str().context("temp path is not UTF-8")?;
-    let dest = format!("{mount}/slim/{name}");
+    let dest = format!("{mount}/boco/{name}");
     cmd(&[
         "podman", "unshare", "--", "install", "-D", "-m", mode, src, &dest,
     ])?;
     Ok(())
 }
 
-/// Inject /slim/init (binary), /slim/exec (null-delimited argv), /slim/env
-/// (null-delimited env), and optionally /slim/user and /slim/workdir into a
+/// Inject /boco/init (binary), /boco/exec (null-delimited argv), /boco/env
+/// (null-delimited env), and optionally /boco/user and /boco/workdir into a
 /// mounted container image rootfs.
 pub fn inject(
     mount_path: &Path,
@@ -93,7 +93,7 @@ pub fn inject(
 ) -> Result<()> {
     let mount_str = mount_path.to_str().context("mount path is not UTF-8")?;
 
-    let init_binary = fs::read(init_binary_path()?).context("Failed to read slim-init binary")?;
+    let init_binary = fs::read(init_binary_path()?).context("Failed to read boco-init binary")?;
     let exec_data = null_delimited(argv);
     let env_data = null_delimited(env);
 

src/main.rs

@@ -9,7 +9,7 @@ mod registry;
 use anyhow::Result;
 use clap::{Parser, Subcommand};
 
-use crate::{build::BuildCmd, image::ImageCmd, qemu::RunCmd};
+use crate::{build::BuildCmd, image::ImageCmd, qemu::BootCmd};
 
 #[derive(Parser, Debug)]
 #[command(about = "Turn containers into bootable VMs")]
@@ -23,8 +23,8 @@ enum Commands {
     /// Build initrd from an image (podman image must exist)
     Build(BuildCmd),
     /// Launch a previously built VM via QEMU.
-    Run(RunCmd),
-    /// List slim images in the registry
+    Boot(BootCmd),
+    /// List boco images in the registry
     #[command(subcommand)]
     Image(ImageCmd),
 }
@@ -35,8 +35,8 @@ fn main() -> Result<()> {
         Commands::Build(cmd) => {
             build::build(cmd)?;
         }
-        Commands::Run(cmd) => {
-            qemu::run(cmd)?;
+        Commands::Boot(cmd) => {
+            qemu::boot(cmd)?;
         }
         Commands::Image(cmd) => {
             image::run(cmd)?;

src/qemu.rs

@@ -1,8 +1,8 @@
 //! QEMU: boot a registry entry with qemu-system-x86_64 using direct kernel
 //! boot (-kernel/-initrd or -drive). The kernel is shared across all VMs
-//! at $XDG_DATA_HOME/slim-rs/registry/vmlinuz. A universal /slim/init script (injected
-//! at build time) handles VM bootstrap; /slim/exec runs the container's
-//! CMD/ENTRYPOINT. Runtime overrides are delivered as `slim.cmd=<base64>`
+//! at $XDG_DATA_HOME/boco/registry/vmlinuz. A universal /boco/init script (injected
+//! at build time) handles VM bootstrap; /boco/exec runs the container's
+//! CMD/ENTRYPOINT. Runtime overrides are delivered as `boco.cmd=<base64>`
 //! on the kernel cmdline.
 
 use anyhow::{Context, Result, bail};
@@ -16,7 +16,7 @@ use crate::{
 };
 
 #[derive(Args, Debug)]
-pub struct RunCmd {
+pub struct BootCmd {
     /// Image tag / registry subdir name
     name: String,
 
@@ -29,7 +29,7 @@ pub struct RunCmd {
     forward: Vec<PortForward>,
 
     /// Override the command to exec in the VM (base64-encoded on the kernel
-    /// cmdline as slim.cmd=<b64>). Overrides the CMD inferred at build time.
+    /// cmdline as boco.cmd=<b64>). Overrides the CMD inferred at build time.
     #[clap(long)]
     cmd: Option<String>,
 
@@ -41,14 +41,14 @@ pub struct RunCmd {
     mount: Vec<String>,
 }
 
-pub(crate) fn run(
-    RunCmd {
+pub(crate) fn boot(
+    BootCmd {
         name,
         memory,
         forward,
         cmd,
         mount,
-    }: RunCmd,
+    }: BootCmd,
 ) -> Result<()> {
     let reg_dir = registry_dir(&name)?;
     let vmlinuz_path = registry_base_dir()?.join("vmlinuz");
@@ -67,7 +67,7 @@ pub(crate) fn run(
         "rw".into(),
         "earlyprintk=serial".into(),
         "nokaslr".into(),
-        "init=/slim/init".into(),
+        "init=/boco/init".into(),
         "devtmpfs.mount=1".into(), // Automatically mount /dev at boot
     ];
 
@@ -81,19 +81,19 @@ pub(crate) fn run(
         fs_args = vec!["-initrd".to_string(), initrd_str];
         cmdline.push("root=/dev/ram0".into());
     } else {
-        bail!("Registry missing rootfs/initrd for '{name}'. Run `slim build` first.");
+        bail!("Registry missing rootfs/initrd for '{name}'. Run `boco build` first.");
     }
 
     if let Some(cmd) = &cmd {
         let argv = ["/bin/sh".to_string(), "-c".to_string(), cmd.clone()];
         let data: Vec<u8> = argv.join("\0").into_bytes();
         let encoded = base64::engine::general_purpose::STANDARD.encode(&data);
-        cmdline.push(format!("slim.cmd={encoded}"));
+        cmdline.push(format!("boco.cmd={encoded}"));
     }
 
-    // Build 9p shares for each --mount.  Tags are short (slim0, slim1, …)
+    // Build 9p shares for each --mount.  Tags are short (boco0, boco1, …)
     // because 9p mount_tag has a ~31-byte limit.  The guest destination path
-    // is passed on the kernel cmdline as slim.mount=<tag>:<base64(guest_path)>.
+    // is passed on the kernel cmdline as boco.mount=<tag>:<base64(guest_path)>.
     // If no guest path is specified, the host path is used as the guest path.
     let mut virtfs_args: Vec<String> = Vec::new();
     for (i, spec) in mount.iter().enumerate() {
@@ -107,7 +107,7 @@ pub(crate) fn run(
         let host_str = canonical
             .to_str()
             .context("Mount path is not valid UTF-8")?;
-        let tag = format!("slim{i}");
+        let tag = format!("boco{i}");
         let dest_b64 = base64::engine::general_purpose::STANDARD.encode(guest_path.as_bytes());
 
         // QEMU's QemuOpts splits on commas — escape literal commas in the
@@ -117,7 +117,7 @@ pub(crate) fn run(
         virtfs_args.push(format!(
             "local,path={host_escaped},mount_tag={tag},security_model=mapped-xattr"
         ));
-        cmdline.push(format!("slim.mount={tag}:{dest_b64}"));
+        cmdline.push(format!("boco.mount={tag}:{dest_b64}"));
     }
 
     println!("Booting {name} from registry: {}", reg_dir.display());

src/registry.rs

@@ -1,12 +1,12 @@
 //! Registry: local storage of built VM artifacts under
-//! `$XDG_DATA_HOME/slim-rs/registry/<image>/`.
+//! `$XDG_DATA_HOME/boco/registry/<image>/`.
 
 use anyhow::{Context, Result, anyhow, bail};
 use std::{fs, io, path::PathBuf};
 
 /// Validate a user-supplied image name before it is used in a registry path.
 ///
-/// The name becomes a directory under `$XDG_DATA_HOME/slim-rs/registry/`, so
+/// The name becomes a directory under `$XDG_DATA_HOME/boco/registry/`, so
 /// path separators and `.`/`..` would allow escaping that directory.
 /// Allow-list: ASCII alphanumerics plus `.`, `_`, `:`, `-` (covers image
 /// refs like `alpine:3.15`).
@@ -27,15 +27,15 @@ pub(crate) fn validate_image_name(name: &str) -> Result<()> {
 }
 
 pub(crate) fn registry_base_dir() -> Result<PathBuf> {
-    let base = xdg::BaseDirectories::with_prefix("slim-rs");
+    let base = xdg::BaseDirectories::with_prefix("boco");
     base.create_data_directory("registry")
         .context("Failed to create XDG_DATA_HOME subdirectory")
 }
 
 pub(crate) fn init_binary_path() -> Result<PathBuf> {
-    let base = xdg::BaseDirectories::with_prefix("slim-rs");
-    base.get_data_file("slim-init")
-        .context("slim-init not found in XDG data dir")
+    let base = xdg::BaseDirectories::with_prefix("boco");
+    base.get_data_file("boco-init")
+        .context("boco-init not found in XDG data dir")
 }
 
 pub(crate) fn registry_dir(image: &str) -> Result<PathBuf> {
@@ -62,7 +62,7 @@ mod tests {
     fn accepts_valid_image_names() {
         for name in [
             "alpine:3.15",
-            "slim",
+            "boco",
             "mock-vm",
             "my_vm",
             "a.b.c",