git open

Setup

To setup the git open alias I recommed to..

1. open command prompt/windows powershell
2. type git config --global alias.open tmp
3. go to the home folder (ctrl+r then type in %HOMEPATH%)
4. paste in git-open.bat
5. open .gitconfig which is also in home folder
6. replace open = tmp with open = !~/git-open.bat
7. save .gitconfig

One line version of git-open.bat..

@echo off & SETLOCAL enabledelayedexpansion & ( IF [%1]==[] EXIT ) & ( IF NOT [%4]==[] EXIT ) & SET "a=0" & SET "b=0" & SET "interactive=0" & ( IF %1==-i SET "a=1" ) & ( IF %1==--interactive SET "a=1" ) & ( IF !a!==1 SET /A "b+=1" & SET "interactive=1" & SET "argument1=%2" & SET "argument2=%3" ) & SET "a=0" & ( IF "%2"=="-i" SET "a=1" ) & ( IF "%2"=="--interactive" SET "a=1" ) & ( IF !a!==1 SET /A "b+=1" & SET "interactive=1" & SET "argument1=%1" & SET "argument2=%3" ) & SET "a=0" & ( IF "%3"=="-i" SET "a=1" ) & ( IF "%3"=="--interactive" SET "a=1" ) & ( IF !a!==1 SET /A "b+=1" & SET "interactive=1" & SET "argument1=%1" & SET "argument2=%2" ) & ( IF !b! GTR 1 EXIT ) & ( IF !interactive!==0 SET "argument1=%1" & SET "argument2=%2" ) & ( IF [!argument2!]==[] ( ( SET "branchOrCommit=" ) & ( SET "pathToFile=!argument1!" ) ) ELSE ( ( SET "branchOrCommit=!argument1!" ) & ( SET "pathToFile=!argument2!" ) ) ) & (git show !branchOrCommit!:!pathToFile! > NUL || EXIT) & ( SET "a=$a=[System.IO.Path]::GetTempFileName(); Remove-Item $a; New-Item $a -ItemType \"Directory\" | Out-Null; $b=$a + (\"\!pathToFile!\" -replace '/','\'); New-Item $b -Force ^| Out-Null; cmd.exe /C (\"git show !branchOrCommit!:!pathToFile! ^> `\"\" + $b + \"`\"\"); $c = New-Object System.Diagnostics.Process;" ) & ( IF !interactive!==1 ( SET "a=!a! $c.StartInfo.Filename = \"openwith.exe\"; $c.StartInfo.Arguments = $b;" ) ELSE ( SET "a=!a! $c.StartInfo.Filename = $b;" ) ) & ( SET "a=!a! $c.start() ^| Out-Null;" ) & ( IF !interactive!==1 SET "a=!a! Wait-Process -InputObject $c;" ) & ( SET "a=!a! Start-Sleep -Milliseconds 500; Remove-Item -Recurse $a;" ) & powershell.exe -Command "!a!"

Usage

There's two ways you can use git open..

• git open <path-to-file>
• git open <branch/commit> <path-to-file>

git open <path-to-file> will..

• if the file at path-to-file is staged.. open the staged file
• otherwise.. open the file from HEAD (i.e. normally the last commit)

git open <branch/commit> <path-to-file> will open the file from the specified branch or commit.

NOTE: the value that can be specified for commit here is displayed in the SHA1 ID box in gitk if selecting a commit (usually no more than the 10 first characters have to be copied, as long as there isn't any ambiguity with another commit it will suffice)

Regardless of which way of using git open, you can additionally provide the -i/--interactive parameter anywhere which will prompt for choosing a program with which to open the file instead of using the default program.

NOTE: e.g. git open -i <branch/commit> <path-to-file> and git open <branch/commit> --interactive <path-to-file> mean the same

Examples

If e.g. there is a file a.tif which was committed and now git status outputs..

On branch <branch>
Your branch is up to date with 'origin/<branch>'.

Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
        modified:   a.tif

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        a.tif

To open a.tif from the previous commit type git open HEAD a.tif.
To open the staged a.tif type git open a.tif.
To open the unstaged a.tif type .\a.tif.

To open a.tif from a specific commit type git open <commit> a.tif.
To open a.tif from the commit before a specific commit type git open <commit>~1 a.tif.
To open a.tif from the second to last commit type git open HEAD~1 a.tif.