Disable git terminal prompt when detecting remote HEAD branch. (#1797)

CHANGELOG.md

@@ -3,9 +3,10 @@
 ## Unreleased
 
 * ![Enhancement][badge-enhancement] Update CSS source file for JuliaMono, so that all font variations are included (not just `JuliaMono Regular`) and that the latest version (0.039 -> 0.044) of the font would be used. ([#1780][github-1780], [#1784][github-1784])
-* ![Bugfix][badge-bugfix] Fix `strict` mode to properly print errors, not just a warnings. ([#1756][github-1756], [#1776][github-1776])
 * ![Enhancement][badge-enhancement] The table of contents in the generated PDFs have more space between section numbers and titles to avoid them overlapping. ([#1785][github-1785])
 * ![Enhancement][badge-enhancement] The preamble of the LaTeX source of the PDF build can now be customized by the user. ([#1746][github-1746], [#1788][github-1788])
+* ![Bugfix][badge-bugfix] Fix `strict` mode to properly print errors, not just a warnings. ([#1756][github-1756], [#1776][github-1776])
+* ![Bugfix][badge-bugfix] Disable git terminal prompt when detecting remote HEAD branch. ([#1797][github-1797])
 
 ## Version `v0.27.15`
 
@@ -1001,6 +1002,7 @@
 [github-1784]: https://github.com/JuliaDocs/Documenter.jl/pull/1784
 [github-1785]: https://github.com/JuliaDocs/Documenter.jl/pull/1785
 [github-1788]: https://github.com/JuliaDocs/Documenter.jl/pull/1788
+[github-1797]: https://github.com/JuliaDocs/Documenter.jl/pull/1797
 <!-- end of issue link definitions -->
 
 [julia-38079]: https://github.com/JuliaLang/julia/issues/38079

src/Documenter.jl

@@ -503,7 +503,9 @@ function deploydocs(;
     # Try to figure out default branch (see #1443 and #1727)
     if devbranch === nothing
         str = try
-            read(pipeline(ignorestatus(setenv(`git remote show origin`; dir=root)); stderr=devnull), String)
+            read(pipeline(ignorestatus(
+                setenv(`git remote show origin`, ["GIT_TERMINAL_PROMPT=0"]; dir=root)
+            ); stderr=devnull), String)
         catch
             ""
         end