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Add git history csv reports
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‎cypher/GitLog/List_git_file_directories_with_commit_statistics.cypher‎

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// List git file directories and their statistics
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MATCH (git_repository:Git&Repository)-[:HAS_FILE]->(git_file:Git&File&!Repository)
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WHERE git_file.deletedAt IS NULL // filter out deleted files
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ORDER BY git_file.relativePath
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WITH *
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,datetime.fromepochMillis(git_file.createdAtEpoch) AS fileCreatedAtTimestamp
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,datetime.fromepochMillis(coalesce(git_file.lastModificationAtEpoch, git_file.createdAtEpoch)) AS fileLastModificationAtTimestamp
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WITH *, git_repository.name + '/' + git_file.relativePath AS filePath
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WITH *, split(filePath, '/') AS pathElements
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WITH *, pathElements[-1] AS fileName
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MATCH (git_commit:Git&Commit)-[:CONTAINS_CHANGE]->(git_change:Git&Change)-->(old_files_included:Git&File&!Repository)-[:HAS_NEW_NAME*0..3]->(git_file)
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WITH pathElements
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,fileCreatedAtTimestamp
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,fileLastModificationAtTimestamp
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,fileName
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,filePath AS fileRelativePath
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,split(git_commit.author, ' <')[0] AS author
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,max(git_commit.sha) AS maxCommitSha
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,collect(DISTINCT git_commit.sha) AS commitHashes
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,date(max(git_commit.date)) AS lastCommitDate
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UNWIND pathElements AS pathElement
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WITH *
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,coalesce(nullif(split(fileRelativePath, '/' + pathElement)[0], fileRelativePath), '') AS parent
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WITH *
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,coalesce(nullif(parent,'') + '/', '') + pathElement AS directory
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WHERE pathElement <> fileName
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WITH directory AS directoryPath
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,split(directory, '/')[-1] AS directoryName
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,parent AS directoryParentPath
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,split(parent, '/')[-1] AS directoryParentName
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,size(split(directory, '/')) AS directoryPathLength
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,author
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,collect(DISTINCT fileRelativePath) AS files
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,max(date(fileCreatedAtTimestamp) ) AS lastCreationDate
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,max(date(fileLastModificationAtTimestamp)) AS lastModificationDate
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,apoc.coll.toSet(apoc.coll.flatten(collect(commitHashes))) AS commitHashes
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,max(maxCommitSha) AS maxCommitSha
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,max(lastCommitDate) AS lastCommitDate
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,max(fileRelativePath) AS maxFileRelativePath
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,duration.inDays(max(lastCommitDate), date()).days AS daysSinceLastCommit
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,duration.inDays(max(fileCreatedAtTimestamp), datetime()).days AS daysSinceLastCreation
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,duration.inDays(max(fileLastModificationAtTimestamp), datetime()).days AS daysSinceLastModification
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// Assure that the authors are ordered by their commit count descending per directory
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ORDER BY directoryPath ASCENDING, size(commitHashes) DESCENDING
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WITH directoryPath
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,directoryName
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,directoryParentPath
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,directoryParentName
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,directoryPathLength
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,collect(author)[0] AS mainAuthor
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,collect(author)[1] AS secondAuthor
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,collect(author)[2] AS thirdAuthor
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,count(DISTINCT author) AS authorCount
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,size(apoc.coll.toSet(apoc.coll.flatten(collect(files)))) AS fileCount
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,size(apoc.coll.toSet(apoc.coll.flatten(collect(commitHashes)))) AS commitCount
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,max(lastCreationDate) AS lastCreationDate
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,max(lastModificationDate) AS lastModificationDate
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,max(maxCommitSha) AS maxCommitSha
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,max(lastCommitDate) AS lastCommitDate
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,min(daysSinceLastCommit) AS daysSinceLastCommit
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,min(daysSinceLastCreation) AS daysSinceLastCreation
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,min(daysSinceLastModification) AS daysSinceLastModification
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,max(maxFileRelativePath) AS maxFileRelativePath
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// The final results are grouped by the statistic values like file count,...
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RETURN collect(directoryPath)[-1] AS directoryPath
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,apoc.text.join(collect(directoryName), '/') AS directoryName
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,collect(directoryParentPath)[0] AS directoryParentPath
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,collect(directoryParentName)[0] AS directoryParentName
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,mainAuthor
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,secondAuthor
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,thirdAuthor
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,authorCount
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,fileCount
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,commitCount
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,lastCreationDate
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,lastModificationDate
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,lastCommitDate
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,daysSinceLastCommit
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,daysSinceLastCreation
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,daysSinceLastModification
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,maxCommitSha
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,maxFileRelativePath
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,max(directoryPathLength) AS directoryPathLength
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,count(DISTINCT directoryPath) AS combinedDirectoriesCount

‎scripts/reports/GitHistoryCsv.sh‎

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#!/usr/bin/env bash
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# Executes "GitLog" Cypher queries to get the "git-history-csv" CSV reports.
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# It contains lists of files with only one author, last changed or created files, pairwise changed files,...
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# Requires executeQueryFunctions.sh, cleanupAfterReportGeneration.sh
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# Fail on any error ("-e" = exit on first error, "-o pipefail" exist on errors within piped commands)
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set -o errexit -o pipefail
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# Overrideable Constants (defaults also defined in sub scripts)
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REPORTS_DIRECTORY=${REPORTS_DIRECTORY:-"reports"}
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## Get this "scripts/reports" directory if not already set
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# Even if $BASH_SOURCE is made for Bourne-like shells it is also supported by others and therefore here the preferred solution.
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# CDPATH reduces the scope of the cd command to potentially prevent unintended directory changes.
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# This way non-standard tools like readlink aren't needed.
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REPORTS_SCRIPT_DIR=${REPORTS_SCRIPT_DIR:-$( CDPATH=. cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P )}
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echo "GitHistoryCsv: REPORTS_SCRIPT_DIR=${REPORTS_SCRIPT_DIR}"
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# Get the "scripts" directory by taking the path of this script and going one directory up.
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SCRIPTS_DIR=${SCRIPTS_DIR:-"${REPORTS_SCRIPT_DIR}/.."} # Repository directory containing the shell scripts
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echo "GitHistoryCsv: SCRIPTS_DIR=${SCRIPTS_DIR}"
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# Get the "cypher" directory by taking the path of this script and going two directory up and then to "cypher".
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CYPHER_DIR=${CYPHER_DIR:-"${REPORTS_SCRIPT_DIR}/../../cypher"}
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echo "GitHistoryCsv: CYPHER_DIR=${CYPHER_DIR}"
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# Define functions to execute cypher queries from within a given file
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source "${SCRIPTS_DIR}/executeQueryFunctions.sh"
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# Create report directory
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REPORT_NAME="git-history-csv"
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FULL_REPORT_DIRECTORY="${REPORTS_DIRECTORY}/${REPORT_NAME}"
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mkdir -p "${FULL_REPORT_DIRECTORY}"
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# Local Constants
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GIT_LOG_CYPHER_DIR="${CYPHER_DIR}/GitLog"
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echo "GitHistoryCsv: $(date +'%Y-%m-%dT%H:%M:%S%z') Processing git history..."
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# Detailed git file statistics
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execute_cypher "${GIT_LOG_CYPHER_DIR}/List_git_files_with_commit_statistics_by_author.cypher" > "${FULL_REPORT_DIRECTORY}/List_git_files_with_commit_statistics_by_author.csv"
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execute_cypher "${GIT_LOG_CYPHER_DIR}/List_git_files_that_were_changed_together_with_another_file.cypher" > "${FULL_REPORT_DIRECTORY}/List_git_files_that_were_changed_together_with_another_file.csv"
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execute_cypher "${GIT_LOG_CYPHER_DIR}/List_git_file_directories_with_commit_statistics.cypher" > "${FULL_REPORT_DIRECTORY}/List_git_file_directories_with_commit_statistics.csv"
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# Overall distribution of how many files were changed with one git commit, how many were changed with two, etc.
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execute_cypher "${GIT_LOG_CYPHER_DIR}/List_git_files_per_commit_distribution.cypher" > "${FULL_REPORT_DIRECTORY}/List_git_files_per_commit_distribution.csv"
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# Data basis for finding out if there is a correlation between pairwise changed files and their dependencies
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execute_cypher "${GIT_LOG_CYPHER_DIR}/List_pairwise_changed_files_with_dependencies.cypher" > "${FULL_REPORT_DIRECTORY}/List_pairwise_changed_files_with_dependencies.csv"
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# Clean-up after report generation. Empty reports will be deleted.
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source "${SCRIPTS_DIR}/cleanupAfterReportGeneration.sh" "${FULL_REPORT_DIRECTORY}"
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echo "GitHistoryCsv: $(date +'%Y-%m-%dT%H:%M:%S%z') Successfully finished."

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