1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
; Pelagos Rust Builder Stack — compose.reml
;
; Architecture:
;
; (no network — single interactive build container)
; rust-builder — cargo registry + sccache disk cache via named volumes
;
; Lisp features demonstrated:
;
; define — edition, memory, and cpu limits named at the top
; env — SCCACHE_BUCKET for optional S3 distributed cache
; volume — named volumes persist cargo registry and sccache across restarts
; define-service — macro: flat keyword-style service definition
;; ── Configuration ─────────────────────────────────────────────────
;;
;; Override memory/CPU without editing this file:
;; MEM=8g CPU=8.0 sudo pelagos compose up -f compose.reml -p rust-builder
;;
;; Optional: point sccache at an S3 bucket for distributed caching:
;; SCCACHE_BUCKET=my-cache sudo pelagos compose up -f compose.reml -p rust-builder
(define rust-edition "2021")
(define mem-builder
(let ((m (env "MEM")))
(if (null? m) "4g" m)))
(define cpu-builder
(let ((c (env "CPU")))
(if (null? c) "4.0" c)))
;; When SCCACHE_BUCKET is set, sccache will use S3 for shared distributed
;; caching across multiple machines. Leave empty for local disk cache only.
(define sccache-bucket
(let ((b (env "SCCACHE_BUCKET")))
(if (null? b) "" b)))
;; ── Service ───────────────────────────────────────────────────────
;;
;; The container runs `sleep infinity` so that `pelagos exec` can be used
;; to run builds interactively:
;;
;; pelagos exec rust-builder-rust-builder cargo build --release
(define-service svc-builder "rust-builder"
:image "rust-builder:latest"
:command "sleep" "infinity" ; stays alive for pelagos exec
:volume "cargo-registry" "/root/.cargo/registry"
:volume "sccache-cache" "/sccache-cache"
:env ("RUSTC_WRAPPER" . "sccache")
("SCCACHE_DIR" . "/sccache-cache")
("RUST_EDITION" . rust-edition)
:memory mem-builder
:cpus cpu-builder)
;; ── Assemble and run ──────────────────────────────────────────────
(compose-up
(compose
(volume "cargo-registry")
(volume "sccache-cache")
svc-builder))