thirdparty: update thirdparty-linux-amd64_tcc.sh, to also record its own full invocation command, and commit the changes automatically

Author: spytheman

thirdparty/build_scripts/thirdparty-linux-amd64_tcc.sh

@@ -1,4 +1,18 @@
-#!/usr/bin/env bash
+## NOTE: this script does *not* use a shebang **deliberately**, in order to
+## access the same shell, to capture its own launching command with `fc`,
+## and to record it later in the new commit message in thirdpart/tcc.
+
+## WARNING: THE ORIGINAL OF THIS SCRIPT IS IN:
+## https://github.com/vlang/v/blob/master/thirdparty/build_scripts/thirdparty-linux-amd64_tcc.sh ,
+## I.E. IN THE MAIN V REPOSITORY. IF YOU NEED TO MAKE CHANGES, CHANGE THAT.
+##
+## THE `build.sh` FILE IN `vlang/tccbin` REPO IS A COPY, RECORDED AT THE TIME
+## OF REBUILDING, FOR EASIER/RELIABLE REPRODUCTION OF HISTORIC VERSIONS.
+## IT IS NOT INTENDED TO BE MODIFIED.
+
+BUILD_CMD=`fc -nl -0`
+## remove whitespaces before/after the actual command:
+BUILD_CMD="$(echo "${BUILD_CMD}" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')"
 
 set -e
 
@@ -13,9 +27,10 @@ export TCC_COMMIT="${TCC_COMMIT:-mob}"
 export TCC_FOLDER="${TCC_FOLDER:-thirdparty/tcc.$TCC_COMMIT}"
 export CC="${CC:-gcc}"
 
+echo " BUILD_CMD: \`$BUILD_CMD\`"
 echo "        CC: $CC"
 echo "TCC_COMMIT: $TCC_COMMIT"
-echo "TCC_FOLDER: $TCC_FOLDER"
+echo "TCC_FOLDER: \`$TCC_FOLDER\`"
 echo ===============================================================
 
 rm -rf tinycc/
@@ -69,4 +84,11 @@ uname -a                                            > $TCC_FOLDER/build_machine_
 ## show the builtin search paths for sanity checking:
 $TCC_FOLDER/tcc.exe -v -v
 
+pushd .
+cd $TCC_FOLDER
+git add .
+git commit -m "build with \`$BUILD_CMD\`"
+popd
+
 echo "tcc commit: $TCC_COMMIT , full hash: $TCC_COMMIT_FULL_HASH . The tcc executable is ready in $TCC_FOLDER/tcc.exe "
+