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e1fb068300
* Add homebrew installation and validation scripts * Update `/etc/environment` in `updatepath.sh` script Keep this code for sake of compatibility with the existing installation logic. It will be changed in its own PR * Remove env. variables from homebrew validation task * Move reboot to the dedicated script and task Co-authored-by: Sergey Dolin <v-sedoli@micorosoft.com>
66 lines
2.3 KiB
Bash
66 lines
2.3 KiB
Bash
#!/bin/bash
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################################################################################
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## File: etc-environment.sh
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## Desc: Helper functions for source and modify /etc/environment
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################################################################################
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# NB: sed expression use '%' as a delimiter in order to simplify handling
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# values containg slashes (i.e. directory path)
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# The values containing '%' will break the functions
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function getEtcEnvironmentVar {
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var_name="$1"
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# remove `var_name=` and possible quotes from the line
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grep "^${var_name}=" /etc/environment |sed -E "s%^${var_name}=\"?([^\"]+)\"?.*$%\1%"
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}
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function addEtcEnvironmentVar {
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var_name="$1"
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var_value="$2"
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echo "$var_name=\"$var_value\"" | sudo tee -a /etc/environment
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}
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function replaceEtcEnvironmentVar {
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var_name="$1"
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var_value="$2"
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# modify /etc/environemnt in place by replacing a string that begins with var_name
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sudo sed -ie "s%^${var_name}=.*$%${var_name}=\"${var_value}\"%" /etc/environment
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}
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function setEtcEnvironmentVar {
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var_name="$1"
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var_value="$2"
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if grep "$var_name" /etc/environment > /dev/null; then
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replaceEtcEnvironmentVar $var_name $var_value
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else
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addEtcEnvironmentVar $var_name $var_value
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fi
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}
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function addEtcEnvironmentPathElement {
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element="$1"
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etc_path=$(getEtcEnvironmentVar PATH)
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setEtcEnvironmentVar PATH "${element}:${etc_path}"
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}
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# Process /etc/environment as if it were shell script with `export VAR=...` expressions
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# The PATH variable is handled specially in order to do not override the existing PATH
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# variable. The value of PATH variable read from /etc/environment is added to the end
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# of value of the exiting PATH variable exactly as it would happen with real PAM app read
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# /etc/environment
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#
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# TODO: there might be the others variables to be processed in the same way as "PATH" variable
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# ie MANPATH, INFOPATH, LD_*, etc. In the current implementation the values from /etc/evironments
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# replace the values of the current environment
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function reloadEtcEnvironment {
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# add `export ` to every variable of /etc/environemnt except PATH and eval the result shell script
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eval $(grep -v '^PATH=' /etc/environment | sed -e 's%^%export %')
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# handle PATH specially
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etc_path=$(getEtcEnvironmentVar PATH)
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export PATH="$PATH:$etc_path"
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}
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