80 lines
2.4 KiB
Bash
Executable file
80 lines
2.4 KiB
Bash
Executable file
#!/bin/bash
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#
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# Usage: git-credential-ghtoken <operation>
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#
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# Allows `git` to authenticate with GitHub using `GH_USER` and `GH_TOKEN`
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# environment variables.
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#
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# To install this:
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#
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# git config --global credential.https://github.com.helper \
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# "$(pwd)/scripts/git-credential-ghtoken"
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#
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# Or copy it into your path and run:
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#
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# git config --global credential.https://github.com.helper ghtoken
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#
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#
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# Copyright (c) 2018 Faraday, Inc.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# Standard paranoia.
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set -euo pipefail
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# Parse our command-line arguments.
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operation="$1"
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# Ignore all operations besides `get`.
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if [ "$operation" != get ]; then
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exit 0
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fi
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# Quit now if we don't have the necessary environment variables.
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if [ ! -v GH_USER ] || [ ! -v GH_TOKEN ]; then
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exit 0
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fi
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# Parse the input we receive from `git`.
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while read line; do
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var="$(echo "$line" | sed 's/=.*$//')"
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val="$(echo "$line" | sed 's/^.*=//')"
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case "$var" in
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# Only send credentials over HTTPS.
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protocol)
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if [ "$val" != https ]; then
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exit 0
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fi
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;;
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# Only send credentials to GitHub (just extra paranoia; change as
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# needed).
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host)
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if [ "$val" != github.com ]; then
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exit 0
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fi
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;;
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esac
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done
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# Output our credentials.
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cat <<EOD
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username=$GH_USER
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password=$GH_TOKEN
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EOD
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