$ pub outdated --json
{
  "packages": []
}

$ pub outdated --no-color
Showing outdated packages.
[*] indicates versions that are not the latest available.

Found no outdated packages

$ pub outdated --no-color --no-transitive
Showing outdated packages.
[*] indicates versions that are not the latest available.

Found no outdated packages

$ pub outdated --no-color --up-to-date
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current  Upgradable  Resolvable  Latest  

direct dependencies:
bar           1.0.0    1.0.0       1.0.0       1.0.0   
foo           1.0.0    1.0.0       1.0.0       1.0.0   
You are already using the newest resolvable versions listed in the 'Resolvable' column.
Newer versions, listed in 'Latest', may not be mutually compatible.

$ pub outdated --no-color --prereleases
Showing outdated packages.
[*] indicates versions that are not the latest available.

Package Name  Current  Upgradable  Resolvable  Latest              

direct dependencies:
bar           *1.0.0   *1.0.0      *1.0.0      2.0.0-nullsafety.0  
foo           *1.0.0   *1.0.0      *1.0.0      2.0.0-nullsafety.0  
You are already using the newest resolvable versions listed in the 'Resolvable' column.
Newer versions, listed in 'Latest', may not be mutually compatible.

$ pub outdated --no-color --no-dev-dependencies
Showing outdated packages.
[*] indicates versions that are not the latest available.

Found no outdated packages

$ pub outdated --no-color --no-dependency-overrides
Showing outdated packages.
[*] indicates versions that are not the latest available.

Found no outdated packages

$ pub outdated --no-color --mode=null-safety
Showing dependencies that are currently not opted in to null-safety.
[✗] indicates versions without null safety support.
[✓] indicates versions opting in to null safety.

Package Name  Current  Upgradable  Resolvable  Latest               

direct dependencies:
bar           ✗1.0.0   ✗1.0.0      -           ✓2.0.0-nullsafety.0  
foo           ✗1.0.0   ✗1.0.0      -           ✓2.0.0-nullsafety.0  
No resolution was found. Try running `dart pub upgrade --null-safety --dry-run` to explore why.

$ pub outdated --no-color --mode=null-safety --transitive
Showing dependencies that are currently not opted in to null-safety.
[✗] indicates versions without null safety support.
[✓] indicates versions opting in to null safety.

Package Name  Current  Upgradable  Resolvable  Latest               

direct dependencies:
bar           ✗1.0.0   ✗1.0.0      -           ✓2.0.0-nullsafety.0  
foo           ✗1.0.0   ✗1.0.0      -           ✓2.0.0-nullsafety.0  
No resolution was found. Try running `dart pub upgrade --null-safety --dry-run` to explore why.

$ pub outdated --no-color --mode=null-safety --no-prereleases
Showing dependencies that are currently not opted in to null-safety.
[✗] indicates versions without null safety support.
[✓] indicates versions opting in to null safety.

Package Name  Current  Upgradable  Resolvable  Latest  

direct dependencies:
bar           ✗1.0.0   ✗1.0.0      -           ✗1.0.0  
foo           ✗1.0.0   ✗1.0.0      -           ✗1.0.0  
No resolution was found. Try running `dart pub upgrade --null-safety --dry-run` to explore why.

$ pub outdated --json --mode=null-safety
{
  "packages": [
    {
      "package": "bar",
      "current": {
        "version": "1.0.0",
        "nullSafety": false
      },
      "upgradable": {
        "version": "1.0.0",
        "nullSafety": false
      },
      "resolvable": null,
      "latest": {
        "version": "2.0.0-nullsafety.0",
        "nullSafety": true
      }
    },
    {
      "package": "foo",
      "current": {
        "version": "1.0.0",
        "nullSafety": false
      },
      "upgradable": {
        "version": "1.0.0",
        "nullSafety": false
      },
      "resolvable": null,
      "latest": {
        "version": "2.0.0-nullsafety.0",
        "nullSafety": true
      }
    }
  ]
}

$ pub outdated --json --no-dev-dependencies
{
  "packages": []
}