[Buildroot] [PATCH v3 03/11] support/download/post-process-helpers: add helper function for post process scripts

From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
To: James Hilliard <james.hilliard1@gmail.com>,
	Christian Stewart <christian@paral.in>,
	Buildroot List <buildroot@buildroot.org>,
	Matt Weber <Matthew.Weber@rockwellcollins.com>,
	"Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Patrick Havelange <patrick.havelange@essensium.com>,
	Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Subject: [Buildroot] [PATCH v3 03/11] support/download/post-process-helpers: add helper function for post process scripts
Date: Thu,  6 Jan 2022 21:59:51 +0100	[thread overview]
Message-ID: <20220106210000.397694-4-thomas.petazzoni@bootlin.com> (raw)
In-Reply-To: <20220106210000.397694-1-thomas.petazzoni@bootlin.com>

download post process scripts will often need to unpack the source
code tarball, do some operation, and then repack it. In order to help
with this, post-process-helpers provide an unpack() function and a
repack() function.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
---
 support/download/helpers | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/support/download/helpers b/support/download/helpers
index 40d5eea591..4c5eb466cc 100755
--- a/support/download/helpers
+++ b/support/download/helpers
@@ -72,5 +72,27 @@ mk_tar_gz() {
     popd >/dev/null
 }
 
+post_process_unpack() {
+    local dest="${1}"
+    local tarball="${2}"
+    local one_file
+
+    mkdir "${dest}"
+    tar -C "${dest}" --strip-components=1 -xf "${tarball}"
+    one_file="$(find "${dest}" -type f -print0 |LC_ALL=C sort -z |head -z -n1 |tr -d "\0")"
+    touch -r "${one_file}" "${dest}.timestamp"
+}
+
+post_process_repack() {
+    local in_dir="${1}"
+    local base_dir="${2}"
+    local out="${3}"
+    local date
+
+    date="@$(stat -c '%Y' "${in_dir}/${base_dir}.timestamp")"
+
+    mk_tar_gz "${in_dir}/${base_dir}" "${base_dir}" "${date}" "${out}"
+}
+
 # Keep this line and the following as last lines in this file.
 # vim: ft=bash
-- 
2.33.1

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