{"id":14155428,"url":"https://github.com/sword-jin/how-dagger-work","last_synced_at":"2026-01-27T21:18:32.724Z","repository":{"id":141287979,"uuid":"479422950","full_name":"sword-jin/how-dagger-work","owner":"sword-jin","description":"explain how dagger work in code","archived":false,"fork":false,"pushed_at":"2022-04-22T06:18:23.000Z","size":274,"stargazers_count":4,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"main","last_synced_at":"2025-02-11T20:30:16.099Z","etag":null,"topics":["cue","cuelang","dagger","go"],"latest_commit_sha":null,"homepage":"","language":"Go","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/sword-jin.png","metadata":{"files":{"readme":"readme.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null}},"created_at":"2022-04-08T14:29:13.000Z","updated_at":"2024-01-16T10:02:09.000Z","dependencies_parsed_at":"2023-11-07T13:45:03.772Z","dependency_job_id":null,"html_url":"https://github.com/sword-jin/how-dagger-work","commit_stats":null,"previous_names":["sword-jin/how-dagger-work"],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sword-jin%2Fhow-dagger-work","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sword-jin%2Fhow-dagger-work/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sword-jin%2Fhow-dagger-work/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/sword-jin%2Fhow-dagger-work/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/sword-jin","download_url":"https://codeload.github.com/sword-jin/how-dagger-work/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247394676,"owners_count":20931991,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["cue","cuelang","dagger","go"],"created_at":"2024-08-17T08:03:07.927Z","updated_at":"2026-01-27T21:18:32.674Z","avatar_url":"https://github.com/sword-jin.png","language":"Go","funding_links":[],"categories":["go"],"sub_categories":[],"readme":"# how-dagger-work\n\n## core idea\n\n### 1. how cue-flow generate a dag\n\n- basic-1.cue, no nest, no dependency\n- basic-2.cue, has nest, no dependency\n- pipeline.cue, has nest, has dependency\n\n```bash\ncd cue-flow-dag\ngo run main.go basic-1.cue isTask\n```\n\n`flow` can generate some dependency trees like this:\n\n```\n#0 Pipeline.client.\"./\".read.contents\n#0 Pipeline.client.\"./_build\".write.contents\n    #1 Pipeline.jobs.build\n        #2 Pipeline.jobs.test\n            #3 Pipeline.jobs.lint\n```\n\n**core code**\n\n- \u003chttps://github.com/cue-lang/cue/blob/41364815392be45549d4be05195010a183b4ac04/tools/flow/tasks.go#L50\u003e\n\n### 2. how cue-flow execute a dag\n\n```bash\ncd cue-flow-execute\ngo run main.go deploy-site.cue\n```\n\n`flow` can execute a dag according to dependency trees, **Tasks belonging to the same level of height can be processed in parallel**\n**core code**\n\n- \u003chttps://github.com/cue-lang/cue/blob/4136481539/tools/flow/run.go#L58\u003e\n\ncan describe a simple pseudo-code:\n\n```go\n// ...\nfor {\n    for _, t := range flow.tasks {\n        switch task.status {\n            case Waiting:\n                waiting = true\n            case Ready:\n                t.status = Running\n                // handle task\n                // if no err\n                t.status = Success\n\n                for _, t2 := range flow.tasks {\n                    if t2.status == Waiting \u0026\u0026 t.IsReady() {\n                        t2.status = Ready\n                    }\n                }\n        }\n    }\n}\n// ...\n\n// Check task is ready for execute\nfunc (t *Task) IsReady() bool {\n    for _, dep := range t.deps {\n        if dep.status != Success {\n            return false\n        }\n    }\n    return true\n}\n\n```\n\n### 3. real-world example\n\n```bash\nmake test -B\nmake build -B\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsword-jin%2Fhow-dagger-work","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsword-jin%2Fhow-dagger-work","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsword-jin%2Fhow-dagger-work/lists"}