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‎.devcontainer/devcontainer.json‎

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{
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"image": "mcr.microsoft.com/devcontainers/base:alpine-3.20",
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"customizations": {
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"vscode": {
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"extensions": ["ms-vscode.live-server"],
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"settings": {
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// Hide workspace files to make it seem like a blank working environment
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"files.exclude": {
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"**/.git": true,
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"**/.codespaces": true,
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"**/exercise-monitor.log": true,
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// This variable is not dynamic. It is replaced by workflow 0-start-exercise.yml
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"**/${RepoName}": true
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},
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"livePreview.openPreviewTarget": "External Browser",
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"livePreview.serverRoot": "stack-overflown/src",
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// Hide publish button
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"git.showActionButton": {
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"publish": false
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},
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// Don't show notification when devcontainer.json is removed
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"github.codespaces.devcontainerChangedNotificationStyle": "none",
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// Show everything for Git graph
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"scm.graph.showIncomingChanges": true,
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"scm.graph.showOutgoingChanges": true,
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"scm.defaultViewMode": "tree",
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"scm.graph.badges": "all"
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}
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}
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},
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"workspaceFolder": "/workspaces",
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"postCreateCommand": "./${RepositoryName}/.devcontainer/post-create.sh",
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"postStartCommand": "./${RepositoryName}/.devcontainer/post-start.sh"
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}

‎.devcontainer/exercise-monitor/.githooks/post-checkout‎

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#!/bin/bash
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echo "Git Hook: Post Checkout"
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# Get checkout information
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PREVIOUS_HEAD=$1
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NEW_HEAD=$2
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BRANCH_NAME=$(git branch --show-current)
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REPO_NAME=$(basename "$(git rev-parse --show-toplevel)")
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d '{
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"event_type": "post-checkout",
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"client_payload": {
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"previous_head": "'"$PREVIOUS_HEAD"'",
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"new_head": "'"$NEW_HEAD"'",
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"branch_name": "'"$BRANCH_NAME"'",
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"repository_name": "'"$REPO_NAME"'",
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"timestamp": "'"$(date -u +"%Y-%m-%dT%H:%M:%SZ")"'"
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}
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}' 2>/dev/null || echo "Failed to send repository dispatch event"

‎.devcontainer/exercise-monitor/.githooks/post-commit‎

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#!/bin/bash
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echo "Git Hook: Post Commit"
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# Get commit information
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COMMIT_HASH=$(git rev-parse HEAD)
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COMMIT_MESSAGE=$(git log -1 --pretty=%B)
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COMMIT_AUTHOR=$(git log -1 --pretty="%an <%ae>")
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BRANCH_NAME=$(git branch --show-current)
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REPO_NAME=$(basename "$(git rev-parse --show-toplevel)")
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MODIFIED_FILES=$(git show --pretty=format: --name-only HEAD | jq -R . | jq -s .)
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# Get total commit count on branch
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DEFAULT_BRANCH=$(git branch --sort=committerdate --format='%(committerdate:short) %(refname:short)' | head -n 1 | cut -d' ' -f2)
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if [ "$BRANCH_NAME" != "$DEFAULT_BRANCH" ]; then
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BRANCH_COMMIT_COUNT=$(git rev-list --count ${DEFAULT_BRANCH}..${BRANCH_NAME})
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BRANCH_COMMIT_MESSAGES=$(git log ${DEFAULT_BRANCH}..${BRANCH_NAME} --pretty=format:'%h%x1f%s' | jq -R -s -c 'split("\n") | map(select(length > 0)) | map(split("\u001f") | {id: .[0], message: .[1]})')
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# echo "Total commits on branch '${BRANCH_NAME}' since '${DEFAULT_BRANCH}': ${BRANCH_COMMIT_COUNT}"
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else
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BRANCH_COMMIT_COUNT=$(git rev-list --count HEAD)
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BRANCH_COMMIT_MESSAGES=$(git log --pretty=format:'%h%x1f%s' | jq -R -s -c 'split("\n") | map(select(length > 0)) | map(split("\u001f") | {id: .[0], message: .[1]})')
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# echo "Total commits on branch '${DEFAULT_BRANCH}': ${BRANCH_COMMIT_COUNT}"
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fi
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# Build JSON payload
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PAYLOAD=$(jq -n \
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--arg event_type "post-commit" \
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--arg commit_hash "$COMMIT_HASH" \
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--arg commit_message "$COMMIT_MESSAGE" \
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--arg commit_author "$COMMIT_AUTHOR" \
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--arg branch_name "$BRANCH_NAME" \
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--argjson branch_commit_count "$BRANCH_COMMIT_COUNT" \
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--argjson branch_commit_messages "$BRANCH_COMMIT_MESSAGES" \
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--arg repository_name "$REPO_NAME" \
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--argjson modified_files "$MODIFIED_FILES" \
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--arg timestamp "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
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'{
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"event_type": $event_type,
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"client_payload": {
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"commit_hash": $commit_hash,
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"commit_message": $commit_message,
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"commit_author": $commit_author,
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"branch_name": $branch_name,
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"branch_commit_count": $branch_commit_count,
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"branch_commit_messages": $branch_commit_messages,
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"repository_name": $repository_name,
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"modified_files": $modified_files,
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"timestamp": $timestamp
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}
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}')
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d "$PAYLOAD" 2>/dev/null || echo "Failed to send repository dispatch event"

‎.devcontainer/exercise-monitor/.githooks/post-merge‎

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#!/bin/bash
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echo "Git Hook: Post Merge"
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# Get merge information
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CURRENT_HEAD=$(git rev-parse HEAD)
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BRANCH_NAME=$(git branch --show-current)
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LAST_COMMIT_MESSAGE=$(git log -1 --pretty=%B)
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MERGE_AUTHOR=$(git log -1 --pretty="%an <%ae>")
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REPO_NAME=$(basename "$(git rev-parse --show-toplevel)")
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BRANCH_COMMIT_COUNT=$(git rev-list --count HEAD)
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BRANCH_COMMIT_MESSAGES=$(git log --pretty=format:'%h%x1f%s' | jq -R -s -c 'split("\n") | map(select(length > 0)) | map(split("\u001f") | {id: .[0], message: .[1]})')
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# echo "Total commits on branch '${DEFAULT_BRANCH}': ${BRANCH_COMMIT_COUNT}"
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# Build JSON payload
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PAYLOAD=$(jq -n \
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--arg event_type "post-merge" \
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--arg current_head "$CURRENT_HEAD" \
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--arg branch_name "$BRANCH_NAME" \
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--argjson branch_commit_count "$BRANCH_COMMIT_COUNT" \
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--argjson branch_commit_messages "$BRANCH_COMMIT_MESSAGES" \
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--arg last_commit_message "$LAST_COMMIT_MESSAGE" \
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--arg merge_author "$MERGE_AUTHOR" \
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--arg repository_name "$REPO_NAME" \
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--arg timestamp "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
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'{
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"event_type": $event_type,
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"client_payload": {
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"current_head": $current_head,
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"branch_name": $branch_name,
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"branch_commit_count": $branch_commit_count,
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"branch_commit_messages": $branch_commit_messages,
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"last_commit_message": $last_commit_message,
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"merge_author": $merge_author,
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"repository_name": $repository_name,
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"timestamp": $timestamp
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}
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}')
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d "$PAYLOAD" 2>/dev/null || echo "Failed to send repository dispatch event"

‎.devcontainer/exercise-monitor/codespace-created.sh‎

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#!/bin/bash
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# If not running in a Codespace, exit
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if [ -z "${CODESPACE_NAME}" ]; then
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echo "Not running in a Codespace. Exiting."
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exit 0
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fi
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echo "Exercise Monitor: Event: codespace-created" >> /workspaces/exercise-monitor.log
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# Get Codespace information
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CODESPACE_NAME="${CODESPACE_NAME}"
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d '{
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"event_type": "codespace-created",
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"client_payload": {
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"codespace_name": "'"$CODESPACE_NAME"'",
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"timestamp": "'"$(date -u +"%Y-%m-%dT%H:%M:%SZ")"'"
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}
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}' 2>/dev/null || echo "Failed to send repository dispatch event"
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‎.devcontainer/exercise-monitor/codespace-started.sh‎

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#!/bin/bash
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# If not running in a Codespace, exit
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if [ -z "${CODESPACE_NAME}" ]; then
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echo "Not running in a Codespace. Exiting."
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exit 0
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fi
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echo "Exercise Monitor: Event: codespace-started" >> /workspaces/exercise-monitor.log
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# Get Codespace information
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CODESPACE_NAME="${CODESPACE_NAME}"
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d '{
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"event_type": "codespace-started",
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"client_payload": {
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"codespace_name": "'"$CODESPACE_NAME"'",
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"timestamp": "'"$(date -u +"%Y-%m-%dT%H:%M:%SZ")"'"
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}
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}' 2>/dev/null || echo "Failed to send repository dispatch event"
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‎.devcontainer/exercise-monitor/git-config-changed.sh‎

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#!/bin/bash
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# Get config type from argument
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CONFIG_TYPE=$1
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echo "Exercise Monitor: Event: git-config-changed ($CONFIG_TYPE)" >> /workspaces/exercise-monitor.log
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# Send repository dispatch event
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curl -X POST \
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-H "Accept: application/vnd.github.v3+json" \
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-H "Authorization: token ${GITHUB_TOKEN}" \
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"https://api.github.com/repos/${GITHUB_REPOSITORY}/dispatches" \
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-d '{
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"event_type": "git-config-changed",
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"client_payload": {
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"config_type": "'"$CONFIG_TYPE"'",
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"timestamp": "'"$(date -u +"%Y-%m-%dT%H:%M:%SZ")"'"
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}
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}' 2>/dev/null || echo "Failed to send repository dispatch event"

‎.devcontainer/exercise-monitor/git-config-monitor.sh‎

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#!/bin/bash
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# Monitor global config changes
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inotifywait -m --include '\.gitconfig$' -e close_write,move,delete /home/vscode | \
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while read -r file; do
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config_type="global"
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/home/vscode/.vscode-remote/data/Machine/exercise-monitor/git-config-changed.sh $config_type
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done &
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# Monitor .git/config changes in repos of /workspaces directory
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inotifywait -m -r --include '\.git/config$' -e close_write,move,delete /workspaces | \
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while read -r file; do
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config_type="repository"
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/home/vscode/.vscode-remote/data/Machine/exercise-monitor/git-config-changed.sh $config_type
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done &
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echo "Exercise Monitor: Enabled event: git-config-changed" >> /workspaces/exercise-monitor.log
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# Heartbeat to keep above monitors alive
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while true; do
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sleep $((60*5)) # 5 minutes
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echo "Exercise Monitor: hearbeat: git-config-monitor" >> /workspaces/exercise-monitor.log
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done

‎.devcontainer/exercise-monitor/install.sh‎

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#!/bin/bash
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echo "Exercise Monitor: Installation started"
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# Install exercise monitor
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cp -r /workspaces/${RepositoryName}/.devcontainer/exercise-monitor /home/vscode/.vscode-remote/data/Machine/exercise-monitor
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echo "Exercise Monitor: Copied monitor files to codespace"
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# Enable Git hook events
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git config --global core.hooksPath /home/vscode/.vscode-remote/data/Machine/exercise-monitor/.githooks
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echo "Exercise Monitor: Enabled event: post-commit"
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echo "Exercise Monitor: Enabled event: post-checkout"
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echo "Exercise Monitor: Enabled event: post-merge"
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# Add support for running monitors in the background using tmux and inotify
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sudo apk add tmux
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sudo apk add inotify-tools
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# Trigger codespace created event
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/home/vscode/.vscode-remote/data/Machine/exercise-monitor/codespace-created.sh
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echo "Exercise Monitor: Installation finished"

‎.devcontainer/exercise-monitor/start.sh‎

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#!/bin/bash
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# Trigger event: codespace-started
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/home/vscode/.vscode-remote/data/Machine/exercise-monitor/codespace-started.sh
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# Watch the Git config
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tmux new-session -d -s git_config_monitor '/home/vscode/.vscode-remote/data/Machine/exercise-monitor/git-config-monitor.sh'
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# Show running background processes and commands to manually stop.
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# tmux ls
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# tmux kill-session -t git_config_monitor
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# pgrep inotifywait
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# for pid in $(pgrep inotifywait); do kill -- "$pid"; done
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echo "Exercise Monitor: Started" >> /workspaces/exercise-monitor.log

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