new makefiles post

master
Adam Veldhousen 5 years ago
parent a3f89c8ad2
commit 4f9e4a34b0
Signed by: adam
GPG Key ID: 6DB29003C6DD1E4B

@ -0,0 +1,62 @@
---
title: "Using credentials in your Makefiles"
date: 2020-01-14T05:57:04Z
draft: false
tags: [make, programming]
---
Recently while working on a project I needed a way to include secrets in my repo for local development that integrated
with my *Make* based build setup. I found that a nice way to do this is with the `include` command in *Make*.
The `include` command allows you to include external files to augment your makefile. First I created a `secrets.mk` and
declared variables in it for my API keys.
```makefile {linenos=table}
# secrets.mk
github_access_token := 'xxxxxxxxxxxxxxxxx'
slack_access_token := 'xxxxxxxxxxxxxxxxx'
```
Then in my makefile I added `include secrets.mk`. Don't forget to add `secrets.mk` to your `.gitignore`!
```makefile
include secrets.mk
.PHONY: dev
dev: app
GITHUB_ACCESS_TOKEN=$(github_access_token) \
SLACK_ACCESS_TOKEN=$(slack_access_token) \
./app
app:
go build -o app main.go
```
One issue with this I ran into was in my CI build I didn't have a `secrets.mk` file. *Make* will fail if it cannot find an
include file on disk or if it *Make* unable to find a rule to generate one. Luckily you can preprend a dash to the include
statement to make it optional, so the rest of your tasks that don't require an include will still be usable.
```makefile
-include secrets.mk
```
Lastly, another neat thing about using this technique is that if an include isn't found, *Make* will look for a task that
can generate it. I added a `secrets.mk` task to my makefile that creates a stub include file that can get filled out with
the correct credentials if needed.
```makefile
include secrets.mk
.PHONY: dev
dev: app
GITHUB_ACCESS_TOKEN=$(github_access_token) \
SLACK_ACCESS_TOKEN=$(slack_access_token) \
./app
app:
go build -o app main.go
secrets.mk:
echo "github_access_token:='xxxxxxxx'" > ./secrets.mk
echo "slack_access_token:='xxxxxxxxx'" >> ./secrets.mk
```

@ -41,7 +41,7 @@ $(OPENRING_BIN):
./hugo gen chromastyles --style=solarized-dark256 > assets/css/syntax.css
./layouts/partials/openring.out.html: $(OPENRING_BIN)
openring \
$(OPENRING_BIN) \
-s https://drewdevault.com/feed.xml \
-s https://dave.cheney.net/feed/atom \
-s https://blog.benjojo.co.uk/rss.xml \

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