(This answer is for typical other persons, that may land here, and that may find it useful)
If you come to install heroku snap using snap command through the command line as follow
sudo snap install heroku --classic (the thing you will find in the heroku doc).
And that after installation the heroku command isn't available. Then here the solution and the why:
First know that when you install a new snap, it get added to /snap folder. A new folder with the snap name is created (/snap/heroku), and the executable file for the command is added to /snap/bin (/snap/bin/heroku).
Try
/snap/bin/heroku help
and you will find it work very well.
Solution: So you have just to add /snap/bin to your PATH environement variable.
Heroku is supposing that it's already done. I don't know, if that should have been done automatically at the installation of snapd package. But any way, that's it.
For how to add new paths to the PATH environment variable look at the links bellow, to get a good idea (case you don't know that already):
Here links about why you need to logout and login back or reboot
Here an example:
sudo nano /etc/environment
i chose to add the path through /etc/environment (remember you can't use shell commands).
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/node-v9.6.1-linux-x64/bin:/snap/bin
You can see i add it at the end (that simple).
Reboot your computer or logout and login back (PAM script handle the construction of the PATH from /etc/environment at session creation time)
If You want to have the effect take place right away, execute:
source /etc/environment && export PATH
(it affect only the current opened shell and the children processes)
Here another example doing it in /etc/profile:
if [ "`id -u`" -eq 0 ]; then
PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
else
PATH="/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games"
fi
PATH="$PATH:/snap/bin"
export PATH
I just added one line (the one before the last, and note that a portion from the whole file (/etc/profile)).
Reboot or logout and login back.
Execute :
source /etc/profile
to be operational right away (affect the current shell and the children processes).
There is different ways to add to PATH, even an infinity of ways if we give our imagination a go. The difference between the ways is about when it get set, and executed, and what scope it reach. As also organization aspect (i can have my own text list (one path per line), and have it compiled and executed in the right manner and place for example). Better see the links above, i put a good selection out there, to get a better understanding about how things work, and what method to choose. But generally the two above for a system wide configuration, are mostly what you need.
