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Enable set the VENDORED_PATH for libgit2 (#650) 

### What this change is doing?
This change aims to enable us to set the `VENDORED_PATH` as an environment variable and failback to the default value if the environment variable is not set. Thus, this change should not break current behavior.

### Why we need this?
This will enable using the script to build libgit2 form source code downloaded manually.

Example:
```sh
LIBGIT2_VER="1.0.1"
DOWNLOAD_URL="https://codeload.github.com/libgit2/libgit2/tar.gz/v${LIBGIT2_VER}""
LIBGIT2_PATH="${HOME}/libgit2-${LIBGIT2_VER}"
wget -O "${LIBGIT2_PATH}.tar.gz" "$DOWNLOAD_URL"
tar -xzvf "${LIBGIT2_PATH}.tar.gz"

VENDORED_PATH=$LIBGIT2_PATH sh ./script/build-libgit2.sh --static
```

(cherry picked from commit f3a746d7b6)
This commit is contained in:
Suhaib Mujahid 2020-09-30 19:57:50 -04:00 committed by lhchavez
parent a81a08606f
commit 0a8255c206
1 changed files with 2 additions and 2 deletions
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4
script/build-libgit2.sh
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@ -15,8 +15,8 @@ if [ "$#" -eq "0" ]; then
usage
fi
ROOT="$(cd "$(dirname "$0")/.." && echo "${PWD}")"
VENDORED_PATH="${ROOT}/vendor/libgit2"
ROOT=${ROOT-"$(cd "$(dirname "$0")/.." && echo "${PWD}")"}
VENDORED_PATH=${VENDORED_PATH-"${ROOT}/vendor/libgit2"}
BUILD_SYSTEM=OFF
while [ $# -gt 0 ]; do