initial public commit

.ci/crossarch-tests/Dockerfile.test

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+# XXX: parametrize somehow?
+FROM golang:1.23
+
+ENV GOCACHE=/cache/GOCACHE GOMODCACHE=/cache/GOMODCACHE GOSIMCACHE=/cache/GOSIMCACHE
+
+WORKDIR /go/src/
+COPY . /go/src/
+
+# clean up .gosim/ if copied
+RUN rm -rf .gosim/
+
+# run with limited concurrency to limit memory usage
+CMD ./test.sh --concurrency 1

.ci/crossarch-tests/docker-compose.yml

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+services:
+  test-linux-arm64:
+    platform: linux/amd64
+    build:
+      context: ../..
+      dockerfile: ./.ci/crossarch-tests/Dockerfile.test
+    volumes:
+      - cache:/cache
+
+  test-linux-amd64:
+    platform: linux/amd64
+    build:
+      context: ../..
+      dockerfile: ./.ci/crossarch-tests/Dockerfile.test
+    volumes:
+      - cache:/cache
+
+volumes:
+  cache:
+
+

.ci/crossarch-tests/test-amd64.sh

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+#!/bin/bash
+cd "${0%/*}"
+set -e
+
+docker compose -f ./docker-compose.yml run --build --rm test-linux-amd64

.ci/crossarch-tests/test-arm64.sh

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+#!/bin/bash
+cd "${0%/*}"
+set -e
+
+docker compose -f ./docker-compose.yml run --build --rm test-linux-arm64

.ci/gofmt

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+#!/bin/bash
+# gofmt checks that code is formatted with gofumpt and sorted inputs
+
+gofiles=$(find . -name "*.go" -and -not -ipath "./gosimout/*" -exec sh -c 'head -1 {} | grep -q "DO NOT EDIT." || echo {}' \;)
+goimports="go run golang.org/x/tools/cmd/goimports -local=github.com/jellevandenhooff/gosim -format-only"
+gofumpt="go run mvdan.cc/gofumpt"
+
+if [[ $1 == "check" ]]; then
+    echo goimports
+    output=$($goimports -l $gofiles)
+    if [[ -n "$output" ]]; then
+        echo $output
+        exit 1
+    fi
+    echo gofumpt
+    output=$($gofumpt -l $gofiles)
+    if [[ -n "$output" ]]; then
+        echo $output
+        exit 1
+    fi
+elif [[ $1 == "fix" ]]; then
+    echo goimports
+    $goimports -w $gofiles
+    echo gofumpt
+    $gofumpt -w $gofiles
+else
+    echo "usage $0 [check|fix]"
+fi

.ci/gosim

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+#!/bin/sh
+# gosim is shorthand for running cmd/gosim:
+go run github.com/jellevandenhooff/gosim/cmd/gosim "$@"

.github/workflows/main.yml

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+name: Test
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+
+      # run tests with -trimpath to hopefully share cache between gosim
+      # invocations in different folders
+      - name: Test
+        run: GOFLAGS=-trimpath ./test.sh --concurrency 1

.gitignore

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+.gosim/
+next.txt

.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Connect to dlv-dap server on localhost:2345",
+            "type": "go",
+            "request": "attach",
+            "mode": "remote",
+            "remotePath": "${workspaceFolder}",
+            "port": 2345,
+            "host": "127.0.0.1",
+            "debugAdapter": "dlv-dap",
+            "stopOnEntry": true,
+        }
+    ]
+}

.vscode/settings.json

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+{
+    "gopls": {
+        "build.env": {
+            "GOOS": "linux",
+        },
+        "formatting.local": "github.com/jellevandenhooff/gosim",
+        "formatting.gofumpt": true
+    },
+    "go.buildFlags": [
+        "-tags=sim,linkname",
+        "-ldflags=-checklinkname=0",
+    ],
+}

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2024 Jelle van den Hooff
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.