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| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "context" |
| 5 | + "encoding/json" |
| 6 | + "io" |
| 7 | + "os" |
| 8 | + "path" |
| 9 | + "runtime" |
| 10 | + |
| 11 | + "github.com/moby/buildkit/client/llb" |
| 12 | + "github.com/moby/buildkit/exporter/containerimage/exptypes" |
| 13 | + gwclient "github.com/moby/buildkit/frontend/gateway/client" |
| 14 | + "github.com/moby/buildkit/frontend/gateway/grpcclient" |
| 15 | + ocispecs "github.com/opencontainers/image-spec/specs-go/v1" |
| 16 | + "github.com/vito/bass/pkg/bass" |
| 17 | + "github.com/vito/bass/pkg/basstls" |
| 18 | + "github.com/vito/bass/pkg/cli" |
| 19 | + "github.com/vito/bass/pkg/runtimes" |
| 20 | + "github.com/vito/bass/pkg/runtimes/util" |
| 21 | +) |
| 22 | + |
| 23 | +func frontend(ctx context.Context) error { |
| 24 | + err := grpcclient.RunFromEnvironment(ctx, frontendBuild) |
| 25 | + if err != nil { |
| 26 | + cli.WriteError(ctx, err) |
| 27 | + } |
| 28 | + |
| 29 | + return err |
| 30 | +} |
| 31 | + |
| 32 | +// mimic dockerfile.v1 frontend |
| 33 | +const ( |
| 34 | + localNameContext = "context" |
| 35 | + localNameDockerfile = "dockerfile" |
| 36 | + localNameBassTLS = "bass-tls" |
| 37 | + keyFilename = "filename" |
| 38 | +) |
| 39 | + |
| 40 | +func frontendBuild(ctx context.Context, gw gwclient.Client) (*gwclient.Result, error) { |
| 41 | + caps := gw.BuildOpts().Caps |
| 42 | + |
| 43 | + scriptFn := gw.BuildOpts().Opts[keyFilename] |
| 44 | + if scriptFn == "" { |
| 45 | + scriptFn = "Dockerfile" |
| 46 | + } |
| 47 | + |
| 48 | + inputs, err := gw.Inputs(ctx) |
| 49 | + if err != nil { |
| 50 | + return nil, err |
| 51 | + } |
| 52 | + |
| 53 | + // contextInput, found := inputs[localNameContext] |
| 54 | + // if !found { |
| 55 | + // contextInput = llb.Local(localNameContext, |
| 56 | + // llb.SessionID(gw.BuildOpts().SessionID), |
| 57 | + // llb.WithCustomName("[internal] local bass workdir"), |
| 58 | + // ) |
| 59 | + // } |
| 60 | + |
| 61 | + scriptInput, found := inputs[localNameDockerfile] |
| 62 | + if !found { |
| 63 | + // running from 'docker build', which doesn't set inputs |
| 64 | + scriptInput = llb.Local(localNameDockerfile, |
| 65 | + llb.SessionID(gw.BuildOpts().SessionID), |
| 66 | + llb.WithCustomName("[internal] local bass script"), |
| 67 | + ) |
| 68 | + } |
| 69 | + |
| 70 | + var certsDir string |
| 71 | + certsInput, found := inputs[localNameBassTLS] |
| 72 | + if found { |
| 73 | + certFS, err := util.OpenRefFS(ctx, gw, certsInput, llb.WithCaps(caps)) |
| 74 | + if err != nil { |
| 75 | + return nil, err |
| 76 | + } |
| 77 | + |
| 78 | + certsDir = basstls.DefaultDir |
| 79 | + if err := os.MkdirAll(certsDir, 0700); err != nil { |
| 80 | + return nil, err |
| 81 | + } |
| 82 | + |
| 83 | + for _, name := range basstls.CAFiles { |
| 84 | + source, err := certFS.Open(name) |
| 85 | + if err != nil { |
| 86 | + return nil, err |
| 87 | + } |
| 88 | + |
| 89 | + fi, err := source.Stat() |
| 90 | + if err != nil { |
| 91 | + return nil, err |
| 92 | + } |
| 93 | + |
| 94 | + target, err := os.OpenFile(path.Join(certsDir, name), os.O_CREATE|os.O_TRUNC|os.O_WRONLY, fi.Mode()) |
| 95 | + if err != nil { |
| 96 | + return nil, err |
| 97 | + } |
| 98 | + |
| 99 | + if _, err := io.Copy(target, source); err != nil { |
| 100 | + return nil, err |
| 101 | + } |
| 102 | + |
| 103 | + if err := target.Close(); err != nil { |
| 104 | + return nil, err |
| 105 | + } |
| 106 | + |
| 107 | + if err := source.Close(); err != nil { |
| 108 | + return nil, err |
| 109 | + } |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + scriptFs, err := util.OpenRefFS(ctx, gw, scriptInput, llb.WithCaps(caps)) |
| 114 | + if err != nil { |
| 115 | + return nil, err |
| 116 | + } |
| 117 | + |
| 118 | + // contextFs, err := newRefFS(ctx, gw, contextInput, llb.WithCaps(caps)) |
| 119 | + // if err != nil { |
| 120 | + // return nil, err |
| 121 | + // } |
| 122 | + |
| 123 | + pool := &runtimes.Pool{} |
| 124 | + |
| 125 | + kitdruntime, err := runtimes.NewBuildkitFrontend(gw, inputs, runtimes.BuildkitConfig{ |
| 126 | + CertsDir: certsDir, |
| 127 | + }) |
| 128 | + if err != nil { |
| 129 | + return nil, err |
| 130 | + } |
| 131 | + |
| 132 | + pool.Runtimes = append(pool.Runtimes, runtimes.Assoc{ |
| 133 | + Runtime: kitdruntime, |
| 134 | + Platform: bass.LinuxPlatform, |
| 135 | + }) |
| 136 | + |
| 137 | + ctx = bass.WithRuntimePool(ctx, pool) |
| 138 | + |
| 139 | + runSt := bass.RunState{ |
| 140 | + Env: bass.NewEmptyScope(), // TODO: build args |
| 141 | + Dir: bass.NewFSPath(scriptFs, bass.ParseFileOrDirPath(path.Dir(scriptFn))), |
| 142 | + Stdin: bass.Stdin, |
| 143 | + Stdout: bass.Stdout, |
| 144 | + } |
| 145 | + |
| 146 | + module := bass.NewRunScope(bass.Ground, runSt) |
| 147 | + // directly pass the context by local name, masquerading it as the host path |
| 148 | + module.Set("*context*", bass.NewHostDir(localNameContext)) |
| 149 | + |
| 150 | + val, err := bass.EvalFSFile(ctx, module, bass.NewFSPath(scriptFs, bass.ParseFileOrDirPath(scriptFn))) |
| 151 | + if err != nil { |
| 152 | + return nil, err |
| 153 | + } |
| 154 | + |
| 155 | + var thunk bass.Thunk |
| 156 | + if err := val.Decode(&thunk); err != nil { |
| 157 | + return nil, err |
| 158 | + } |
| 159 | + |
| 160 | + platform := ocispecs.Platform{ |
| 161 | + OS: runtime.GOOS, |
| 162 | + Architecture: runtime.GOARCH, |
| 163 | + } |
| 164 | + |
| 165 | + builder := kitdruntime.NewBuilder(ctx, gw) |
| 166 | + |
| 167 | + ib, err := builder.Build( |
| 168 | + ctx, |
| 169 | + thunk, |
| 170 | + func(st llb.ExecState, sourcePath string) llb.State { |
| 171 | + return st.Root() |
| 172 | + }, |
| 173 | + ) |
| 174 | + if err != nil { |
| 175 | + return nil, err |
| 176 | + } |
| 177 | + |
| 178 | + def, err := ib.FS.Marshal(ctx, llb.WithCaps(caps)) |
| 179 | + if err != nil { |
| 180 | + return nil, err |
| 181 | + } |
| 182 | + |
| 183 | + outRes, err := gw.Solve(ctx, gwclient.SolveRequest{ |
| 184 | + Definition: def.ToPB(), |
| 185 | + }) |
| 186 | + if err != nil { |
| 187 | + return nil, err |
| 188 | + } |
| 189 | + |
| 190 | + if _, hasConfig := outRes.Metadata[exptypes.ExporterImageConfigKey]; !hasConfig { |
| 191 | + configBytes, err := json.Marshal(ocispecs.Image{ |
| 192 | + Architecture: platform.Architecture, |
| 193 | + OS: platform.OS, |
| 194 | + OSVersion: platform.OSVersion, |
| 195 | + OSFeatures: platform.OSFeatures, |
| 196 | + Config: ib.Config, |
| 197 | + }) |
| 198 | + if err != nil { |
| 199 | + return nil, err |
| 200 | + } |
| 201 | + |
| 202 | + outRes.AddMeta(exptypes.ExporterImageConfigKey, configBytes) |
| 203 | + } |
| 204 | + |
| 205 | + return outRes, nil |
| 206 | +} |
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