I want to use git command git show -s --format=%h in batch file, want to store the result in variable.
This doesn't work:
FOR /F %%i IN ('git show -s --format=%h') DO set commit=%%i
echo commit=%commit%
because with echo on the command it executes is:
FOR /F %i IN ('git show -s --format') DO set commit=%i
and output is:
commit=
This method works, but seems odd solution:
set hhh="=%%h"
FOR /F %%i IN ('git show -s --format%hhh%') DO set commit=%%i
because the command executes is:
FOR /F %i IN ('git show -s --format"=%h"') DO set commit=%i
and output is correct:
commit=6446e53
I guess it it related to how variables are referenced and used in batch file with percent sign.
Is there a better solution, that will execute as it should: git show -s --format=%h?
CodePudding user response：
Here is a list of how to escape characters in batch files: Escape Characters - by Rob van der Woude
In case the link goes down in the future:
| Character to be escaped | Escape Sequence | Remark |
|---|---|---|
| % | %% | |
| ^ | ^^ | May not always be required in doublequoted strings, but it won't hurt |
| & | ^& | |
| < | ^< | |
| > | ^> | |
| | | ^| | |
| ' | ^' | Required only in the FOR /F "subject" (i.e. between the parenthesis), unless backq is used |
| ` | ^` | Required only in the FOR /F "subject" (i.e. between the parenthesis), if backq is used |
| , | ^, | Required only in the FOR /F "subject" (i.e. between the parenthesis), even in doublequoted strings |
| ; | ^; | |
| = | ^= | |
| ( | ^( | |
| ) | ^) | |
| ! | ^^! | Required only when delayed variable expansion is active |
| " | "" | Required only inside the search pattern of FIND |
| \ | \\ | Required only inside the regex pattern of FINDSTR |
| [ | \[ | |
| ] | \] | |
| " | \" | |
| . | \. | |
| * | \* | |
| ? | \? |