Is it possible to make .gitignore changed according to environment variables

Question

Is it possible to add to .gitignore rules depends on environment variables?

for example

if -e $(ENV_VAR) \"AAA\"
!liba.so
else
liba.so

---

Answer 1

The answer is no. Gitignore rules are static. You can turn around it by dynamically creating your .gitignore file. So, you will also have dynamically created static rules.

This can be easily done within the application building system such a Makefile. The .gitignore file can rebuilt each time the project is built.

Example Makefile:

all: my_app .gitignore

.gitignore: some deps
    cp my_static_gitignore_rules .gitignore
    echo 'dynamically_created_rule1' >> .gitignore
    echo 'dynamically_created_rule2' >> .gitignore

my_app: my_app.c
    ...