VS Code tasks.json for Rust/Cargo

tasks.json

/*
 Before using this tasks.json you may like to consider trying one of the following VS Code extensions:

 rust-analyzer
    Marketplace: https://marketplace.visualstudio.com/items?itemName=matklad.rust-analyzer
    Source: https://github.com/rust-analyzer/rust-analyzer

 rls
    Marketplace: https://marketplace.visualstudio.com/items?itemName=rust-lang.rust
    Source: https://github.com/rust-lang/rls-vscode

*/

// Available variables which can be used inside of strings.
// ${workspaceRoot}: the root folder of the team
// ${file}: the current opened file
// ${fileBasename}: the current opened file's basename
// ${fileDirname}: the current opened file's dirname
// ${fileExtname}: the current opened file's extension
// ${cwd}: the current working directory of the spawned process
{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "build",
      "args": ["build", "-v"],
      "command": "cargo",
      "group": "build",
      "problemMatcher": [
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "pattern": {
            "regexp": "^(.*):(\\d+):(\\d+):\\s+(\\d+):(\\d+)\\s+(warning|error):\\s+(.*)$",
            "file": 1,
            "line": 2,
            "column": 3,
            "endLine": 4,
            "endColumn": 5,
            "severity": 6,
            "message": 7
          }
        }
      ]
    },
    {
      "label": "clean",
      "args": ["clean"],
      "command": "cargo",
      "presentation": {
        "reveal": "always"
      }
    },
    {
      "label": "run",
      "args": ["run", "-v"],
      "command": "cargo",
      "presentation": {
        "reveal": "always"
      },
      "group": {
          "kind": "build",
          "isDefault": true
      },
      "problemMatcher": [
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "pattern": {
            "regexp": "^(.*):(\\d+):(\\d+):\\s+(\\d+):(\\d+)\\s+(warning|error):\\s+(.*)$",
            "file": 1,
            "line": 2,
            "column": 3,
            "endLine": 4,
            "endColumn": 5,
            "severity": 6,
            "message": 7
          }
        }
      ]
    },
    {
      "label": "test",
      "args": ["test"],
      "command": "cargo",
      "presentation": {
        "reveal": "always"
      },
      "group": {
          "kind": "z",
          "isDefault": false
      },
      "problemMatcher": [
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "pattern": {
            "regexp": "^(.*):(\\d+):(\\d+):\\s+(\\d+):(\\d+)\\s+(warning|error):\\s+(.*)$",
            "file": 1,
            "line": 2,
            "column": 3,
            "endLine": 4,
            "endColumn": 5,
            "severity": 6,
            "message": 7
          }
        },
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "severity": "error",
          "pattern": {
            "regexp": "^.*panicked\\s+at\\s+'(.*)',\\s+(.*):(\\d+)$",
            "message": 1,
            "file": 2,
            "line": 3
          }
        }
      ]
    },
    {
      "label": "bench",
      "args": ["bench"],
      "command": "cargo",
      "presentation": {
        "reveal": "always"
      },
      "group": "test",
      "problemMatcher": [
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "pattern": {
            "regexp": "^(.*):(\\d+):(\\d+):\\s+(\\d+):(\\d+)\\s+(warning|error):\\s+(.*)$",
            "file": 1,
            "line": 2,
            "column": 3,
            "endLine": 4,
            "endColumn": 5,
            "severity": 6,
            "message": 7
          }
        },
        {
          "owner": "rust",
          "fileLocation": ["relative", "${workspaceRoot}"],
          "severity": "error",
          "pattern": {
            "regexp": "^.*panicked\\s+at\\s+'(.*)',\\s+(.*):(\\d+)$",
            "message": 1,
            "file": 2,
            "line": 3
          }
        }
      ]
    }
  ]
}

(On Linux Mint) I find the tasks in the $project/.vscode/tasks.json files quite useful. After all, VS code allows to set keyboard shortcuts (Ctrl+K) to open the task selection popup (Ctrl+P / Tasks: RunTask) and to re-run the last task (Ctrl+P / Tasks: Rerun Last Task). Same with $project/.vscode/launch.json - just hit F5 to start debugging. In a project with plenty of source files it tends to get a little tedious having to find the entry point, and then to click on Codelens' links - i.e. "Run" or "Debug".

@mbartelsm

• In the build and run tasks, you can now use "$rustc" instead of the regex in the "problemMatcher" property.
• More alternatives will be shown in the auto-completion popup when you enter the problem matcher's value - i.e. $rust-panic, $rustc, $rustc-json, $rustc-watch.
• The "test" task complains about a missing "type" property, which should most likely be "type": "cargo",
• In the "test" task the linter complains about the "kind" property in the "group" object - only "build", "test" or "none" are allowed.

{//- $project/.vscode/tasks.json
  {//- run "cargo test"
    "label": "test",
    "group": "test",
    "type": "cargo",
    "command": "test",
    "args": [],
    "presentation": {
      "reveal": "always"
    },
    "problemMatcher": ...,
  }
}

@epenabella

Thanks for the hints on launch.json. However, the following also seems to work.

{//- $project/.vscode/launch.json
  "version": "0.2.0",
  "configurations": [
    {
      "name": "debug rust",
      "type": "lldb",
      "request": "launch",
      "preLaunchTask": "build",//- name of the task in tasks.json
      "program": "${workspaceFolder}/target/debug/rust-test",
      "args": [],
      "cwd": "${workspaceFolder}",
      "console": "integratedTerminal",
    },
  ]
}

Anyways, thanks to all for this gist!