From 128f118c552819d052c7ebc40f7bcfdcf7826c8a Mon Sep 17 00:00:00 2001 From: lu0 Date: Sat, 11 Sep 2021 20:50:54 -0500 Subject: [PATCH] Migrate and refactor from lu0/git-scripts/git-partial-clone to make it a submodule. --- .gitignore | 3 + LICENSE | 674 +++++++++++++++++++++++++++++++++++++++++++ README.md | 63 ++++ example.conf | 22 ++ git-partial-clone.sh | 193 +++++++++++++ template.conf | 22 ++ 6 files changed, 977 insertions(+) create mode 100644 .gitignore create mode 100644 LICENSE create mode 100644 README.md create mode 100644 example.conf create mode 100755 git-partial-clone.sh create mode 100644 template.conf diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..d0b3889 --- /dev/null +++ b/.gitignore @@ -0,0 +1,3 @@ +tmp/ +releases/ + \ No newline at end of file diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/LICENSE @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/README.md b/README.md new file mode 100644 index 0000000..00e5a4c --- /dev/null +++ b/README.md @@ -0,0 +1,63 @@ +`git-partial-clone` +--- + +This script clones a subdirectory of a github/gitlab repository. + +# Usage +## Quick test +Test the script with the example config file. +By the end of the execution, you will see a `tmp` directory containing the subfolder of the example repository. +```zsh +./git-partial-clone.sh example.conf +``` +## Install +Add the script to your `PATH` +```zsh +ln -srf git-partial-clone.sh ~/.local/bin/git-partial-clone +``` +Then you can execute the script from any directory with your custom config file. +```zsh +git-partial-clone path/to/your/config/file.conf +``` + +# Configuration +Fill in the config file ([`template.conf`](./template.conf)) with the information of the repository you're cloning. You can see the example file [here](./example.conf). + +## Mandatory variables + +- `GIT_HOST`: + - `github` if the repository is hosted on Github. + - `gitlab` if the repository is hosted on Gitlab. +- `REPO_OWNER`: + - Username of the owner/author of the repository. +- `REPO_NAME`: + - Name of the repository to be cloned. +- **`REMOTE_PARTIAL_DIR`**: + - **Subdirectory of the repository you want to clone**. + - Omit it to clone the entire repository. + +## Mandatory variables for **private repositories** +You will need to generate an access token in order to clone private repositories, as password authentication is deprecated. + +- Github: [github.com/settings/tokens](https://github.com/settings/tokens). +- Gitlab: [gitlab.com/-/profile/personal_access_tokens](https://gitlab.com/-/profile/personal_access_tokens). + +Once you have a token, store it in a file. + +- `TOKEN_PATH`: + - Path to the file containing the access token. +- `GIT_USER`: + - Username with access to the repository. + +## Optional variables +The following variables give you more control over the objects you're cloning. +- `BRANCH`: + - The branch to be fetched. + - Omit it to pull all of the branches and switch to the default one. +- `COMMIT_DEPTH`: + - Number of commits you want to fetch (useful for deployment purposes). + - Omit it to fetch the entire remote history. +- `PARENT_DIR`: + - Path to the target parent directory. + - Omit it to clone the repository in the current directory. + \ No newline at end of file diff --git a/example.conf b/example.conf new file mode 100644 index 0000000..d115c3c --- /dev/null +++ b/example.conf @@ -0,0 +1,22 @@ +# +# Example of the git-partial-clone configuration file +# +# Copyright (c) 2021 Lucero Alvarado +# https://github.com/lu0/git-partial-clone +# +# THIS FILE DOES NOT SUPPORT INLINE COMMENTS! +# + +GIT_HOST=github +REPO_OWNER=lu0 +REPO_NAME=vscode-settings +REMOTE_PARTIAL_DIR=json/snippets + +TOKEN_PATH= +GIT_USER= + +BRANCH= +COMMIT_DEPTH=3 + +PARENT_DIR=tmp + \ No newline at end of file diff --git a/git-partial-clone.sh b/git-partial-clone.sh new file mode 100755 index 0000000..67e2872 --- /dev/null +++ b/git-partial-clone.sh @@ -0,0 +1,193 @@ +#!/bin/bash + +# +# The git-partial-clone script +# Clone a subdirectory of a github/gitlab repository +# +# Copyright (c) 2021 Lucero Alvarado +# https://github.com/lu0/git-partial-clone +# + +CONFIG_FILE_PATH=${1} + +git-partial-clone() { + # Source config file + [ ${1} ] \ + && get-variables-from-file ${1} \ + || { notif err "git-partial-clone requires a configuration file." && abort ;} + + check-mandatory-vars "GIT_HOST REPO_NAME REPO_OWNER" || abort + get-token-from-file "${TOKEN_PATH}" GIT_TOKEN + + # Change working directory + get-clone-dir-path "${PARENT_DIR}" "${REPO_NAME}" CLONE_DIR || abort + mkdir "${CLONE_DIR}" && cd "${CLONE_DIR}" || abort + + # Add origin + [ -d "${CLONE_DIR}"/.git/ ] \ + && notif err "${CLONE_DIR} is already a git directory." && abort \ + || git init + GIT_URL=${GIT_HOST}.com/${REPO_OWNER}/${REPO_NAME} + [ ${GIT_USER} ] && [ ${GIT_TOKEN} ] \ + && git remote add origin https://${GIT_USER}:${GIT_TOKEN}@${GIT_URL}.git \ + || git remote add origin https://${GIT_URL}.git + + enable-partial-clone ${CLONE_DIR} ${REMOTE_PARTIAL_DIR} + fetch-commit-history ${CLONE_DIR} ${COMMIT_DEPTH} + + # Pull branch(es) + [ ${BRANCH} ] \ + && { notif ok "Trying to fetch branch ${BRANCH}" && \ + pull-single-branch ${CLONE_DIR} ${BRANCH} ;} \ + || { notif warn "BRANCH not specified, pulling every branch in ${REPO_NAME}." && \ + pull-all-branches ${CLONE_DIR} ;} + + # Done + [ ${REMOTE_PARTIAL_DIR} ] \ + && notif ok "${REMOTE_PARTIAL_DIR} of https://${GIT_URL} was cloned into" \ + || notif ok "https://${GIT_URL} was cloned into" + notif ok "${CLONE_DIR}" + cd - && unset-variables-from-file ${1} +} + +check-mandatory-vars() { + # Returns an error if a mandatory variable is missing. + # Usage: check-mandatory-vars ${STRING_OF_SPACE_SEPARATED_VAR_NAMES} + local vars_arr=($1) + local count=0 + for var_name in "${vars_arr[@]}"; do + local var_value="${!var_name}" + # echo "$var_name=${var_value}" + [ "${var_value}" ] \ + || { notif err "$var_name is mandatory." && ((++count)) ;} + done + [[ $count -eq 0 ]] && return 0 || return 1 +} + +get-token-from-file() { + # Reads the contents of the token file + # Usage: get-token-from-file + eval TOKEN_PATH="${1}" # expand quoted path + MSG_NO_TOKEN="The repository must be public in order to be cloned." + MSG_TOKEN_PROVIDED="A token was found! The repository will be cloned if you have access to it." + + [[ -z $TOKEN_PATH ]] \ + && notif warn "You did not provide a token. ${MSG_NO_TOKEN}" \ + || { MY_TOKEN=$(cat ${TOKEN_PATH}) && [ ${MY_TOKEN} ] \ + && eval "${2}='${MY_TOKEN}'" && notif ok "${MSG_TOKEN_PROVIDED}" \ + || notif err "Could not find a token in ${TOKEN_PATH}. ${MSG_NO_TOKEN}" ;} +} + +get-clone-dir-path() { + # Returns the path where the repository will be cloned. + # Usage: get-clone-dir-path + local PARENT_DIR="${1}" + local REPO_NAME="${2}" + [[ -z "${PARENT_DIR}" ]] && PARENT_DIR=${PWD} && notif warn "PARENT_DIR is blank" + + # Convert to absolute + [[ "${PARENT_DIR:0:1}" != "/" ]] && PARENT_DIR=${PWD}/${PARENT_DIR} + + # Remove leading slash + [[ "${PARENT_DIR}" == */ ]] && PARENT_DIR="${PARENT_DIR: : -1}" + + mkdir -p "${PARENT_DIR}" && [ -d "${PARENT_DIR}" ] \ + && eval "${3}='${PARENT_DIR}/${REPO_NAME}'" \ + && notif ok "The repository will be cloned within ${PARENT_DIR}" && return 0 \ + || { notif err "${PARENT_DIR} does not exist." && return 1 ;} +} + +get-variables-from-file() { + # Set the variables contained in a file of key-value pairs + export $(grep --invert-match '^#' ${1} | xargs -d '\n') +} + +unset-variables-from-file() { + # Removes variables contained in a file of key-value pairs + unset $(grep --invert-match '^#' ${1} | \ + grep --perl-regexp --only-matching '.*(?=\=)' | xargs) +} + +enable-partial-clone() { + # Enable partial cloning if a subfolder is provided + local CLONE_DIR=${1} + local REMOTE_PARTIAL_DIR=${2} + [ ${REMOTE_PARTIAL_DIR} ] \ + && git -C ${CLONE_DIR} config --local extensions.partialClone origin \ + && git -C ${CLONE_DIR} sparse-checkout set ${REMOTE_PARTIAL_DIR} +} + +fetch-commit-history() { + # Fetch history according to the provided commit depth + local CLONE_DIR="${1}" + local COMMIT_DEPTH="${2}" + [ ${COMMIT_DEPTH} ] && [ ${COMMIT_DEPTH} -eq ${COMMIT_DEPTH} ] \ + && { notif warn "Using COMMIT_DEPTH=${COMMIT_DEPTH}." \ + && git -C ${CLONE_DIR} fetch --depth ${COMMIT_DEPTH} --filter=blob:none \ + || abort clean ;} \ + || { notif warn "COMMIT_DEPTH not provided, fetching all of the history." \ + && git -C ${CLONE_DIR} fetch --filter=blob:none \ + || abort clean ;} +} + +pull-single-branch() { + local CLONE_DIR=${1} + local BRANCH=${2} + git -C ${CLONE_DIR} checkout -b $BRANCH + git -C ${CLONE_DIR} pull origin $BRANCH \ + && git -C ${CLONE_DIR} branch --set-upstream-to=origin/$BRANCH ${BRANCH} \ + || abort clean +} + +pull-all-branches() { + # Pull every branch in the remote + # and switch to the default branch + local CLONE_DIR=${1} + + # Create empty branches + N_BRANCHES=$(git -C ${CLONE_DIR} branch -r | wc -l) + for ((i=1; i<=$N_BRANCHES; i++)); do + BRANCH_NAME_i=$(git -C ${CLONE_DIR} branch -r | \ + head -$i | tail -1 | sed s/"origin\/"// | xargs) + git -C ${CLONE_DIR} checkout -b $BRANCH_NAME_i + done + + # Pull and track every branch + for ((i=1; i<=$N_BRANCHES; i++)); do + CURRENT_BRANCH=$(git -C ${CLONE_DIR} branch -r | \ + head -$i | tail -1 | sed s/"origin\/"// | xargs) + git -C ${CLONE_DIR} checkout $CURRENT_BRANCH + git -C ${CLONE_DIR} pull origin $CURRENT_BRANCH + git -C ${CLONE_DIR} branch --set-upstream-to=origin/$CURRENT_BRANCH ${CURRENT_BRANCH} + done + HEAD_BRANCH=$(git -C ${CLONE_DIR} remote show origin | \ + grep --perl-regexp --only-matching '(?<=HEAD branch: ).*') + git checkout ${HEAD_BRANCH} +} + +notif() { + # Usage: notif + local info='\033[0m' + local ok='\033[0;32m' + local warn='\033[0;33m' + local err='\033[0;31m' + local STATUS=${!1} + local MSG="${2}" + printf $STATUS"${MSG}\n" + printf ${info} +} + +abort() { + notif err "Aborted." + case $# in + 1) + notif warn "Removing empty tree in ${CLONE_DIR}" + rm -rf ${CLONE_DIR} && \ + rmdir -p --ignore-fail-on-non-empty ${CLONE_DIR%/*} + ;; + esac + exit +} + +git-partial-clone ${CONFIG_FILE_PATH} + \ No newline at end of file diff --git a/template.conf b/template.conf new file mode 100644 index 0000000..3ea9605 --- /dev/null +++ b/template.conf @@ -0,0 +1,22 @@ +# +# Example of the git-partial-clone configuration file +# +# Copyright (c) 2021 Lucero Alvarado +# https://github.com/lu0/git-partial-clone +# +# THIS FILE DOES NOT SUPPORT INLINE COMMENTS! +# + +GIT_HOST= +REPO_OWNER= +REPO_NAME= +REMOTE_PARTIAL_DIR= + +TOKEN_PATH= +GIT_USER= + +BRANCH= +COMMIT_DEPTH= + +PARENT_DIR= + \ No newline at end of file