[+] brup

fish/includes/git.fish

@@ -98,6 +98,16 @@ function git-update-main --description 'Checkout and fast-forward the main branc
     command git pull --ff-only
 end
 
+function git-fetch-main --description 'Fetch the latest main branch from origin'
+    set -l main_branch $argv[1]
+    if test -z "$main_branch"
+        set main_branch (git-main-branch); or return 1
+    end
+
+    command git fetch origin "+refs/heads/$main_branch:refs/remotes/origin/$main_branch"; or return 1
+    printf '%s\n' "$main_branch"
+end
+
 function br --description 'Switch to an existing branch, or create one from updated main'
     if test (count $argv) -ne 1
         echo 'Usage: br <branch-name>'
@@ -137,6 +147,19 @@ function bru --description 'Update the current branch by rebasing it on updated
     command git rebase "$main_branch"
 end
 
+function brup --description 'Merge the latest origin main branch into the current branch'
+    set -l current_branch (command git symbolic-ref --quiet --short HEAD 2>/dev/null)
+    if test -z "$current_branch"
+        echo 'Could not determine current branch.'
+        return 1
+    end
+
+    git-require-clean; or return 1
+
+    set -l main_branch (git-fetch-main); or return 1
+    command git merge "refs/remotes/origin/$main_branch"
+end
+
 function git-env --description 'Alias common git subcommands into the shell'
     set -l git_commands add bisect branch checkout clone commit diff fetch grep init log merge pull push rebase reset restore show stash tag
     for cmd in $git_commands

powershell.ps1

@@ -547,7 +547,7 @@ function git-main-branch {
     }
 
     Write-Error 'Could not determine main branch.'
-    return 1
+    return
 }
 
 function git-update-main {
@@ -560,6 +560,16 @@ function git-update-main {
     Invoke-RawGit pull --ff-only
 }
 
+function git-fetch-main {
+    param([string]$MainBranch)
+    if (-not $MainBranch) { $MainBranch = git-main-branch | Select-Object -First 1 }
+    if (-not $MainBranch) { return }
+
+    Invoke-RawGit fetch origin "+refs/heads/${MainBranch}:refs/remotes/origin/${MainBranch}"
+    if ($LASTEXITCODE -ne 0) { return }
+    Write-Output $MainBranch
+}
+
 function br {
     param([Parameter(Mandatory = $true)][string]$Branch)
     if (-not (Test-GitCleanWorktree)) { return 1 }
@@ -600,6 +610,20 @@ function bru {
     Invoke-RawGit rebase $mainBranch
 }
 
+function brup {
+    $currentBranch = Invoke-RawGit symbolic-ref --quiet --short HEAD 2>$null
+    if ($LASTEXITCODE -ne 0 -or -not $currentBranch) {
+        Write-Error 'Could not determine current branch.'
+        return 1
+    }
+
+    if (-not (Test-GitCleanWorktree)) { return 1 }
+
+    $mainBranch = git-fetch-main | Select-Object -First 1
+    if (-not $mainBranch) { return 1 }
+    Invoke-RawGit merge "refs/remotes/origin/$mainBranch"
+}
+
 function git-env {
     foreach ($cmd in @('add', 'bisect', 'branch', 'checkout', 'clone', 'commit', 'diff', 'fetch', 'grep', 'init', 'log', 'merge', 'pull', 'push', 'rebase', 'reset', 'restore', 'show', 'stash', 'tag')) {
         $name = $cmd

scripts/includes/later/git.zsh

@@ -97,6 +97,16 @@ git-update-main() {
     command git pull --ff-only
 }
 
+git-fetch-main() {
+    local main_branch="$1"
+    if [[ -z "$main_branch" ]]; then
+        main_branch=$(git-main-branch) || return 1
+    fi
+
+    command git fetch origin "+refs/heads/${main_branch}:refs/remotes/origin/${main_branch}" || return 1
+    echo "$main_branch"
+}
+
 br() {
     if [[ $# -ne 1 ]]; then
         echo 'Usage: br <branch-name>'
@@ -139,6 +149,21 @@ bru() {
     command git rebase "$main_branch"
 }
 
+brup() {
+    local current_branch
+    current_branch=$(command git symbolic-ref --quiet --short HEAD 2>/dev/null)
+    if [[ -z "$current_branch" ]]; then
+        echo 'Could not determine current branch.'
+        return 1
+    fi
+
+    git-require-clean || return 1
+
+    local main_branch
+    main_branch=$(git-fetch-main) || return 1
+    command git merge "refs/remotes/origin/$main_branch"
+}
+
 # Git environment
 git-env() {
     git_commands=( add bisect branch checkout clone commit diff fetch grep init log merge pull push rebase reset restore show stash tag )