gleam-lang-gleam/CHANGELOG.md

Changelog

Unreleased

Compiler

• The compiler will now show "Unused variable" warning for each of alternative patterns. (Andrey Kozhev)

Build tool

• gleam remove now rejects invalid package names with an error explaining naming rules, instead of stating that the package is not a dependency. Trying to remove gleam_otp@1 now suggests the matching dependency gleam_otp, if there is one. (Tom Voet)

• When Hex dependencies change version the build tool now prints a link to the diff on Hex, making it easier to review and audit dependency updates. (Manas Ganesh Dasari)

• The Hex files page will now be used for the view-source link in generated documentation when the package's source repository uses an unknown forge or is not set. (Alex Hinde)

• The Hex credentials file is now written with read-write permissions for the owner only (0600 on Unix), preventing other users from reading it. (bala-bhargav)

Language server

• The language server will now offer "Discard unused variable" on each of alternative patterns. (Andrey Kozhev)

• The language server now allows to find references of echo. For example,

  pub fn wibble(woo) {
    echo woo
  //^^^^
    echo wobble(woo)
  //^^^^
  }
  
  pub fn wobble(woo) {
    echo woo
  //^^^^
  }
  

  When triggering on any of denoted places, it will show all usages. (Andrey Kozhev)

• The language server now allows to highlight all echo in file. For example,

  pub fn wibble(woo) {
    echo woo
  //^^^^
    echo wobble(woo)
  //^^^^
  }
  
  pub fn wobble(woo) {
    echo woo
  //^^^^
  }
  

  If this feature is enabled in your editor, hovering any of denoted places will highlight all of them. (Andrey Kozhev)

• The language server now allows to find references of todo. For example,

  pub const wubble = todo
  //                 ^^^^
  
  pub fn wibble() {
    todo as "unimplemented yet"
  //^^^^^^^^^^^^^^^^^^^^^^^^^^^
  }
  
  pub fn empty() {}
  //^^^^^^^^^^^^ Empty functions are shown too!
  
  pub fn block() {
    {}
  //^^ And empty blocks too!
  }
  

  When triggering on any of denoted places, it will show all usages. (Andrey Kozhev)

• The language server now allows to highlight all todo in file. For example,

  pub const wubble = todo
  //                 ^^^^
  
  pub fn wibble() {
    todo as "unimplemented yet"
  //^^^^^^^^^^^^^^^^^^^^^^^^^^^
  }
  
  pub fn empty() {}
  //^^^^^^^^^^^^ Empty functions are highlighted too!
  
  pub fn block() {
    {}
  //^^ And empty blocks too!
  }
  

  If this feature is enabled in your editor, hovering any of denoted places will highlight all of them. (Andrey Kozhev)

• The language server now allows to find references of panic. For example,

  pub fn wibble() {
    panic
  //^^^^^
  }
  
  pub fn wobble() {
    panic as "unimplemented"
  //^^^^^^^^^^^^^^^^^^^^^^^^
  }
  

  When triggering on any of denoted places, it will show all usages. (Andrey Kozhev)

• The language server now allows to highlight all panic in file. For example,

  pub fn wibble() {
    panic
  //^^^^^
  }
  
  pub fn wobble() {
    panic as "unimplemented"
  //^^^^^^^^^^^^^^^^^^^^^^^^
  }
  

  If this feature is enabled in your editor, hovering any of denoted places will highlight all of them. (Andrey Kozhev)

Bug fixes

• Fixed a bug where the language server "Generate variant" code action would duplicate module name when triggered on qualified values. (Andrey Kozhev)

• Fixed a bug where bad error message would be shown when trying to publish package with no README on Windows. (Andrey Kozhev)

• Fixed a bug where the build tool would not reject invalid application names if one is returned by the Hex API. (Louis Pilfold)

v1.19.1 - 2026-10-07

Bug fixes

• Fixed a bug where the export javascript-prelude and export typescript-prelude commands would not run. (Louis Pilfold)